using System;
using Ease.Core.Model;
using Ease.Core.DataAccess;
using HRM.BO;
using Ease.Core.Utility;
using System.Collections.Generic;
using System.Linq;

namespace HRM.DA
{
    public abstract class AbstractTaxCalculator
    {
        #region Define Class Variable
        protected SalaryMonthly _salary;
        private BonusProcess.BonusProcessDetail _bonus;
        protected Employee _employee;
        protected TaxParameter _taxParameter;
        private TaxParameter _PrvYeartaxParameter;
        protected List<TaxParameterSlab> _taxSlabs;
        protected List<IncomeTax> _currentYearTax;
        private List<IncomeTax> _prvYearTotalIncomes;
        protected List<ADParameter> _adParameters;
        protected List<TaxMergeMaster> _mergeItems;
        protected List<ProcessItem> _processItems;
        private List<ITEmpHead> _assignedHeads;
        private List<BonusParameter> _projectionBonusParams;
        protected List<BonusParameter> _ApplicableBonusParams;
        protected List<BonusProcess.BonusProcessDetail> _paidBonuses;
        protected List<BATBGrandFatherTaging> _bATBGrandFatherTagings;
        protected List<AllowanceDeduction> _allowanceDeductions;
        protected List<EmployeeTaxInvestment> _empTaxInvestments = null;
        protected List<TaxInvestment> _investmentTypes =null;
        protected double _projectedMonth;
        protected double _onceoffAmount;
        List<OTProcess> _oTProcesss = null;
        private double _taxontaxamount;
        public bool? _investmentwithoutpf= null;
        public bool? _monthlyexemption = null;
        public bool _isActualInvestment;
        #endregion Define Class Variable

        public AbstractTaxCalculator()
        {

        }
        public AbstractTaxCalculator(int taxParameterID, int payrolltypeid)
        {
            _isActualInvestment = false;
            _salary = null;
            _taxSlabs = null;
            TaxParameter param = new TaxParameterService().Get(taxParameterID);
            _mergeItems = new TaxMergeMasterService().GetbyTaxParameter(param.ID, payrolltypeid);
            if (param != null)
                _assignedHeads = new ITEmpHeadService().GetWithTaxParam(param.ID);
            _processItems = new ProcessItemService().Get();
            _onceoffAmount = 0;
            this.payrolltype = new PayrollTypeService().Get(payrolltypeid);
        }

        public AbstractTaxCalculator(TaxParameter taxparam, PayrollType ptype)
        {
            _isActualInvestment = false;
            _salary = null;
            _taxSlabs = null;
            TaxParameter param =  taxparam;
            _mergeItems = new TaxMergeMasterService().GetbyTaxParameter(param.ID, ptype.ID);
            this.payrolltype = ptype;
            if (param != null)
                _assignedHeads = new ITEmpHeadService().GetWithTaxParam(param.ID);
            _processItems = new ProcessItemService().Get();
            _onceoffAmount = 0;
        }

        public abstract TaxParameter TaxParameter { set; }
        public abstract Employee Employee { set; }
        public abstract SalaryMonthly Salary { set; }
        public abstract List<ADParameter> AdParameters { set; }
        public List<AllowanceDeduction> AllowanceDeductions
        {
            get
            {
                return _allowanceDeductions;
            }
            set
            {
                _allowanceDeductions = value;
            }
        }

        public List<BonusProcess.BonusProcessDetail> PaidBonues
        {
            get
            {
                return _paidBonuses;
            }
            set
            {
                _paidBonuses = value;
            }
        }

        public List<IncomeTax> CurrentYearTax
        {
            get
            {
                return _currentYearTax;
            }
            set { _currentYearTax = value; }
        }
        public BonusProcess.BonusProcessDetail Bonus
        {
            set
            {
                _bonus = value;
            }
        }
        public List<IncomeTax> Calculate()
        {
            List<IncomeTax> returnedItems = new List<IncomeTax>();
            return returnedItems;
        }
        private void EmployeeSlab()
        {
            //TaxParameter.Get
        }
        public PayrollType payrolltype { get; set; }

        private void Add(IncomeTax taxItem)
        {
            if (taxItem.Position == 0)
            {
                ProcessItem pitem = _processItems.Find(delegate (ProcessItem item)
                { return item.ItemCode == (int)taxItem.ItemGroup; });
                if (pitem == null) throw new ServiceException("Tax process item code not found in the process collection; Item Code:" + taxItem.ItemGroup.ToString());
                taxItem.Position = pitem.Position;
            }

            IncomeTax existItem = _currentYearTax.Find(delegate (IncomeTax item)
            { return item.ItemGroup == taxItem.ItemGroup && item.ItemID == taxItem.ItemID; });
            if (existItem == null) _currentYearTax.Add(taxItem);
            else
            {
                existItem.PreviousAmount = existItem.PreviousAmount + taxItem.PreviousAmount;
                existItem.ThisMonthAmount = existItem.ThisMonthAmount + taxItem.ThisMonthAmount;
                existItem.ProjectedAmount = existItem.ProjectedAmount + taxItem.ProjectedAmount;
                existItem.Position = taxItem.Position;
                existItem.Description = taxItem.Description;
            }
        }

        protected IncomeTax Add(EnumIncomeTaxItemGroup group, int itemId,
            string description, double thismonthAmount,
            double projectedamount, EnumIncomeTaxSide side)
        {

            IncomeTax existItem = _currentYearTax.Find(delegate (IncomeTax item)
            { return item.ItemGroup == group && item.ItemID == itemId; });
            if (existItem == null)
            {
                ProcessItem pitem = _processItems.Find(delegate (ProcessItem item)
                { return item.ItemCode == (int)group; });
                if (pitem == null) throw new ServiceException("Tax process item code not found in the process collection; Item Code:" + group.ToString());

                IncomeTax taxItem = new IncomeTax();
                taxItem.ItemGroup = group;
                taxItem.ItemID = itemId;



                taxItem.Description = (description == string.Empty) ? pitem.UserDescription : description;
                taxItem.Position = pitem.Position;
                taxItem.PreviousAmount = projectedamount;
                taxItem.ThisMonthAmount = thismonthAmount;
                taxItem.ProjectedAmount = projectedamount;
                taxItem.EmployeeID = _employee.ID;
                taxItem.Side = side;
                _currentYearTax.Add(taxItem);
                return taxItem;
            }
            else
            {
                if (existItem.Position == 0)
                {
                    ProcessItem pitem = _processItems.Find(delegate (ProcessItem item)
                    { return item.ItemCode == (int)group; });
                    if (pitem == null) throw new ServiceException("Tax process item code not found in the process collection; Item Code:" + group.ToString());
                    existItem.Position = pitem.Position;
                }

                existItem.ThisMonthAmount = existItem.ThisMonthAmount + thismonthAmount;
                existItem.ProjectedAmount = existItem.ProjectedAmount + projectedamount;
                existItem.Description = description;
                existItem.Side = side;
                return existItem;
            }
        }
        protected void CalcualteprojectMonth()
        {
            //_projectedMonth  = 12 - Ease.CoreV35.Utility.Global.DateFunctions.DateDiff ("m", 
            //           SystemInformation.CurrentSysInfo.TaxYearEndDate, 
            //           SystemInformation.CurrentSysInfo.NextPayProcessDate);
            _projectedMonth = 12 - (((this.payrolltype.NextPayProcessDate.Year - this.payrolltype.TaxYearEndDate.Year) * 12)
                + this.payrolltype.NextPayProcessDate.Month - this.payrolltype.TaxYearEndDate.Month);
            if (_projectedMonth < 0) _projectedMonth = 0;

            //_projectedMonth= Ease.CoreV35.Utility.Global.DateFunctions.DateDiff("m",
            //             new DateTime(2010, 12, 31), new DateTime(2011, 6, 30));
            if (_employee.EndOfContractDate != null && _employee.EndOfContractDate != DateTime.MinValue)
            {
                if (_employee.EndOfContractDate < _taxParameter.FiscalyearDateTo)
                    _projectedMonth = GetProjectionMonth((DateTime)_employee.EndOfContractDate);
            }
        }
        protected void CalculateOT()
        {
            // find current month OT


            if (_oTProcesss == null)
                _oTProcesss = new OTProcessService().Get(this.payrolltype.NextPayProcessDate);


            OTProcess op = _oTProcesss.FirstOrDefault(x => x.EmployeeID == _employee.ID);
            if (op == null) return;

            IncomeTax otItem = _currentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
            && x.ItemGroup == EnumIncomeTaxItemGroup.TimeCard && x.ItemID == 2);
            //if (otItem == null) otItem = this.Add(EnumIncomeTaxItemGroup.TimeCard, (int)EnumIncomeTaxItemGroup.TimeCard, string.Empty, 0, 0, EnumIncomeTaxSide.Dec_SalaryIncome);

            if (otItem == null) otItem = this.Add(EnumIncomeTaxItemGroup.TimeCard, (int)EnumIncomeTaxItemGroup.TimeCard, "Time Card", 0, 0, EnumIncomeTaxSide.Dec_SalaryIncome);

            // update this month amount
            otItem.ThisMonthAmount = op.Amount;
            otItem.ProjectedAmount = op.Amount * _projectedMonth;

        }

        private double GetProjectionMonth(DateTime date)
        {
            double nFraction;
            //If Month is July then no need for Projection
            if (date.Month == 7)
                nFraction = Convert.ToDouble(0);
            else
                nFraction = GlobalFunctions.GetFraction(this.payrolltype.NextPayProcessDate.AddDays(1), date);
            return nFraction;
        }
        private double GetAmountfromSalary(SalaryMonthlyDetail detail)
        {
            if (detail.itemGroupCode == EnumSalaryGroup.Arrear)
                _onceoffAmount = _onceoffAmount + detail.ChangedAmount;
            if (detail.itemGroupCode == EnumSalaryGroup.Miscellaneous || detail.itemGroupCode == EnumSalaryGroup.OtherItem) return 0;
            if (detail.itemGroupCode == EnumSalaryGroup.Gross || detail.itemGroupCode == EnumSalaryGroup.Arrear)
                return detail.ChangedAmount;
            else return -detail.ChangedAmount;
        }
        protected IncomeTax GetTaxItem(EnumTaxMergeType type, int ItemId, string itemName)
        {
            IncomeTax taxItem = TaxMergeMaster.Extract(
                _mergeItems, type, ItemId);
            if (taxItem == null) throw new ServiceException("Tax setup not found for the Item :" + itemName);
            if (taxItem != null)
                taxItem.EmployeeID = _employee.ID;
            return taxItem;
        }

        protected void InitializeForNextMonth()
        {
            if (_currentYearTax == null)
            {
                _currentYearTax = new List<IncomeTax>();
                _currentYearTax = new IncomeTaxService().Get(_employee.ID, EnumIncomeTaxDataFrom.ProcessTempData);
            }
            foreach (IncomeTax item in _currentYearTax)
            {
                item.PreviousAmount = item.PreviousAmount + item.ThisMonthAmount;
                item.ThisMonthAmount = 0;
                item.ProjectedAmount = 0;
            }
        }
        private SalaryMonthlyDetail CreateSalaryDetail(string description, EnumSalaryItemCode itemCode, int itemid, int supportid, double amount)
        {
            SalaryMonthlyDetail odetail = new SalaryMonthlyDetail();
            odetail.Description = description;
            odetail.itemGroupCode = EnumSalaryGroup.Gross;
            odetail.ItemCode = itemCode;
            odetail.ItemID = itemid;
            odetail.ChangedAmount = amount;
            odetail.SupportID = supportid;
            return odetail;
        }
        protected void CalculateOnlyProjection()
        {
            foreach (IncomeTax item in this.CurrentYearTax)
                item.ProjectedAmount = 0;

            List<ADParameter> adParams = null;
            List<ADParameterEmployee> adParamEmps = null;
            EmployeeGradeSalary oEmpGSalary = new EmployeeGradeSalary();
            List<TaxRawItem> rawItems = new List<TaxRawItem>();
            _projectedMonth = _projectedMonth + 1;
            _salary = new SalaryMonthly();
            _salary.Details.Add(this.CreateSalaryDetail("Basic Salary", EnumSalaryItemCode.Basic_Salary, (int)EnumSalaryItemCode.Basic_Salary, 0, _employee.BasicSalary));

            if (_adParameters == null) _adParameters = new ADParameterService().Get(EnumStatus.Regardless, EnumAllowOrDeduct.Allowance, this.payrolltype.ID);
            adParams = new ADParameterService().GetApplicableParameters(_employee, (int)_employee.GradeID, _adParameters);
            if (adParams != null)
            {
                foreach (ADParameter adParam in adParams)
                {
                    //if (adParam.EntitleType == EnumEntitleType.Grade)
                    //    _salary.Details.Add(this.CreateSalaryDetail(adParam.AllowanceDeduction.Name,
                    //        EnumSalaryItemCode.Allowance, adParam.AllowanceDeduction.ID, adParam.ID, new ADParameterService().GetGradeDefinedAmount(_employee, _employee.BasicSalary,
                    //    _employee.GrossSalary, new EmployeeGradeSalary())));

                }
            }

            adParamEmps = new ADParameterEmployeeService().GetByEmployee(_employee.ID, EnumAllowOrDeduct.Allowance, EnumADEmpType.AppliedToIndividual);

            if (adParamEmps != null)
            {
                foreach (ADParameterEmployee adEmp in adParamEmps)
                {
                    _salary.Details.Add(this.CreateSalaryDetail(adEmp.AllowDeduct.Name,
                        EnumSalaryItemCode.Allowance, adEmp.AllowDeduct.ID, adEmp.ID, adEmp.MonthlyAmount));

                }
            }
            this.IncludePayslipItems();
            foreach (IncomeTax item in this.CurrentYearTax)
            {
                item.PreviousAmount = 0;
                item.ThisMonthAmount = 0;
            }
        }
        protected void CalculateOnlyProjection(List<ADParameter> oParams)
        {
            foreach (IncomeTax item in this.CurrentYearTax)
                item.ProjectedAmount = 0;

            List<ADParameter> adParams = null;
            List<ADParameterEmployee> adParamEmps = null;
            EmployeeGradeSalary oEmpGSalary = new EmployeeGradeSalary();
            List<TaxRawItem> rawItems = new List<TaxRawItem>();
       //     _projectedMonth = _projectedMonth + 1;
            _salary = new SalaryMonthly();
            _salary.Details.Add(this.CreateSalaryDetail("Basic Salary", EnumSalaryItemCode.Basic_Salary, (int)EnumSalaryItemCode.Basic_Salary, 0, _employee.BasicSalary));
            if(this._allowanceDeductions == null)
            {
                this._allowanceDeductions = new AllowanceDeductionService().Get(EnumStatus.Regardless, this.payrolltype.ID);
            }

            if (_adParameters == null) _adParameters = oParams;// ADParameter.Get(EnumStatus.Regardless, EnumAllowOrDeduct.Allowance);
            adParams = new ADParameterService().GetApplicableParameters(_employee, (int)_employee.GradeID, _adParameters);
            if (adParams != null)
            {
                foreach (ADParameter adParam in adParams)
                {
                    adParam.AllowanceDeduction = this._allowanceDeductions.FirstOrDefault(x => x.ID == adParam.AllowDeductID);

                    if (adParam.EntitleType == EnumEntitleType.Grade)
                        _salary.Details.Add(this.CreateSalaryDetail(adParam.AllowanceDeduction.Name,
                            EnumSalaryItemCode.Allowance, adParam.AllowanceDeduction.ID, adParam.ID, 
                            new ADParameterService().GetGradeDefinedAmount(_employee, _employee.BasicSalary,
                        _employee.GrossSalary, new EmployeeGradeSalary(), adParam)));

                }
            }

            adParamEmps = new ADParameterEmployeeService().GetByEmployee(_employee.ID, EnumAllowOrDeduct.Allowance, EnumADEmpType.AppliedToIndividual);

            if (adParamEmps != null)
            {
                foreach (ADParameterEmployee adEmp in adParamEmps)
                {
                    _salary.Details.Add(this.CreateSalaryDetail(adEmp.AllowDeduct.Name,
                        EnumSalaryItemCode.Allowance, adEmp.AllowDeduct.ID, adEmp.ADParameterID, adEmp.MonthlyAmount));

                }
            }
            this.IncludePayslipItems();
            foreach (IncomeTax item in this.CurrentYearTax)
            {
                item.PreviousAmount = 0;
                item.ThisMonthAmount = 0;
            }
        }


        private bool IsExamptedItem(IncomeTax Item)
        {
            bool IsExamptedItem = false;

            if (Item.ItemGroup == EnumIncomeTaxItemGroup.House_Rent_Allowance)
                IsExamptedItem = true;
            else if (Item.ItemGroup == EnumIncomeTaxItemGroup.Conveyance_Allowance)
                IsExamptedItem = true;
            else if (Item.ItemGroup == EnumIncomeTaxItemGroup.Medical_Allowance)
                IsExamptedItem = true;
            else if (Item.ItemGroup == EnumIncomeTaxItemGroup.LFA_Allowance)
                IsExamptedItem = true;

            return IsExamptedItem;
        }

        private IncomeTax PayslipAllowanceDeduction(SalaryMonthlyDetail salaryDetail, EnumTaxMergeType type)
        {
            EmployeeGradeSalary oEmpGSalary = new EmployeeGradeSalary();
            IncomeTax item = null;
            ADParameter adparameter = _adParameters.FirstOrDefault(x => x.ID == salaryDetail.SupportID);
            if (adparameter == null)
                throw new ServiceException("Allowance/deduction parameter not found for " + salaryDetail.Description);
            if (adparameter.IsTaxable == false) return null;

            item = this.GetTaxItem(type, salaryDetail.ItemID, salaryDetail.Description);
            item.ThisMonthAmount = GlobalFunctions.Round(item.ThisMonthAmount + GetAmountfromSalary(salaryDetail));



            if (adparameter.Periodicity == EnumPeriodicity.OneOff)
            {
                //if (User.CurrentUser.LogInPayrollTypeID.Integer == 1)
                //{
                if (IsExamptedItem(item) == false)
                    _onceoffAmount = _onceoffAmount + item.ThisMonthAmount;
                //}
                //else
                //{
                //    if (adparameter.IsDependsOnAttendance == true)
                //    {
                //        item.ProjectedAmount = GlobalFunctions.Round(item.ThisMonthAmount) * _projectedMonth;

                //    }
                //}
            }
            else
            {
                if (salaryDetail.itemGroupCode == EnumSalaryGroup.Gross)
                {
                    //if (User.CurrentUser.LogInPayrollTypeID.Integer != 1 && item.ItemGroup == EnumIncomeTaxItemGroup.Conveyance_Allowance)
                    //{
                    //    double conveyance = adparameter.FlatAmount;
                    //    if (_employee.GrandFather != null) conveyance = adparameter.GFFlatAmount;
                    //    item.ProjectedAmount = conveyance;
                    //    item.ProjectedAmount = 26 * _projectedMonth * conveyance;
                    //}
                    //else
                    {
                        #region Management Payrol
                        if (adparameter.EntitleType == EnumEntitleType.Grade)
                        {
                            item.ProjectedAmount = GlobalFunctions.Round( new ADParameterService().GetGradeDefinedAmount(_employee, _employee.BasicSalary, _employee.GrossSalary, oEmpGSalary, adparameter)) * _projectedMonth;
                        }
                        else
                        {
                            DateTime fromDate = GlobalFunctions.FirstDateOfMonth(this.payrolltype.NextPayProcessDate);
                            DateTime toDate = this.payrolltype.NextPayProcessDate;
                            if (salaryDetail.SupportID != null)
                            {

                                ADParameterEmployee oempadp = salaryDetail.ADParamEmployee;
                                if (oempadp == null)
                                    oempadp = new ADParameterEmployeeService().Get(_employee.ID, salaryDetail.ItemID, (int)salaryDetail.SupportID, EnumArrearType.NotPresent);
                                //ADParameterEmployee oempadp = ADParameterEmployee.Get(_employee.ID, ID.FromInteger(salaryDetail.ItemID), salaryDetail.SupportID);
                                if (oempadp != null)
                                {

                                    fromDate = GlobalFunctions.FirstDateOfMonth(this.payrolltype.NextPayProcessDate.AddMonths(1));

                                    if (oempadp.TillDate == null || oempadp.TillDate == DateTime.MinValue)
                                    {
                                        if (_employee.EndOfContractDate == null)
                                            toDate = _taxParameter.FiscalyearDateTo;
                                        else toDate = (DateTime)_employee.EndOfContractDate;
                                    }
                                    else
                                    {
                                        if (_employee.EndOfContractDate == null)
                                            toDate = (DateTime)oempadp.TillDate;
                                        else toDate = (DateTime)_employee.EndOfContractDate;


                                    }

                                    double nproject = 0;
                                    if (fromDate > toDate) nproject = 0;
                                    else
                                    {
                                        if (toDate > _taxParameter.FiscalyearDateTo) toDate = _taxParameter.FiscalyearDateTo;
                                        nproject = GlobalFunctions.GetFraction(fromDate, toDate);
                                    }

                                    item.ProjectedAmount = GlobalFunctions.Round(oempadp.GetAmount(_employee.BasicSalary, 0)) * nproject;
                                }
                                else item.ProjectedAmount = GlobalFunctions.Round(item.ThisMonthAmount) * _projectedMonth;
                            }
                            else item.ProjectedAmount = GlobalFunctions.Round(item.ThisMonthAmount) * _projectedMonth;
                        }
                        #endregion
                    }
                }
            }
            return item;
        }

        protected void IncludePayslipItems()
        {
            foreach (SalaryMonthlyDetail salaryDetail in _salary.Details)
            {
                IncomeTax item = null;
                switch (salaryDetail.ItemCode)
                {
                    case EnumSalaryItemCode.Basic_Salary:

                        item = GetTaxItem(EnumTaxMergeType.NONE, (int)EnumIncomeTaxItemGroup.Basic_Salary, salaryDetail.Description);
                        item.ThisMonthAmount = GlobalFunctions.Round(GetAmountfromSalary(salaryDetail));
                        if (salaryDetail.itemGroupCode == EnumSalaryGroup.Gross) item.ProjectedAmount = GlobalFunctions.Round(_employee.BasicSalary) * _projectedMonth;
                        break;
                    case EnumSalaryItemCode.Over_Time_Amount:
                        item = GetTaxItem(EnumTaxMergeType.OT, salaryDetail.ItemID, salaryDetail.Description);
                        if (item == null) throw new ServiceException("Tax grouping not found for " + salaryDetail.Description);
                        item.ThisMonthAmount = GlobalFunctions.Round(GetAmountfromSalary(salaryDetail));
                        break;
                    case EnumSalaryItemCode.Bonus:
                        //if (salaryDetail.ItemID == (int)EnumBATBBonusType.Management_Festival && PaidBonues != null)
                        //{
                        //    BonusProcess.BonusProcessDetail obDetail = PaidBonues.FirstOrDefault(x => x.EmployeeID.Integer == _employee.ID.Integer && x.BonusID.Integer == salaryDetail.ItemID && x.IsLFA == true);
                        //    if (obDetail != null) item = GetTaxItem(EnumTaxMergeType.NONE, (int)EnumIncomeTaxItemGroup.LFA_Allowance, salaryDetail.Description);
                        //    else item = GetTaxItem(EnumTaxMergeType.Bonus, salaryDetail.ItemID, salaryDetail.Description);
                        //}
                        //else 
                        item = GetTaxItem(EnumTaxMergeType.Bonus, salaryDetail.ItemID, salaryDetail.Description);
                        if (item == null) throw new ServiceException("Tax grouping not found for " + salaryDetail.Description);
                        item.ThisMonthAmount = GlobalFunctions.Round(GetAmountfromSalary(salaryDetail));
                        break;
                    case EnumSalaryItemCode.Allowance:
                        item = this.PayslipAllowanceDeduction(salaryDetail, EnumTaxMergeType.Allowance);
                        if (item == null) continue;
                        break;
                    case EnumSalaryItemCode.Deduction:
                        item = this.PayslipAllowanceDeduction(salaryDetail, EnumTaxMergeType.Deduction);
                        if (item == null) continue;
                        break;
                    //case EnumSalaryItemCode.PF_Contribution:
                    //    item = GetTaxItem(EnumTaxMergeType.NONE, (int)EnumIncomeTaxItemGroup.Company_Contri_PF, salaryDetail.Description);
                    //    item.ThisMonthAmount =GlobalFunctions.Round(GetAmountfromSalary(salaryDetail));
                    //    break;
                    default:
                        break;
                }
                if (item != null) item.Side = EnumIncomeTaxSide.Inc_SalaryIncome;
                if (item != null) this.Add(item);
            }

        }

        protected void CalculateExemptionOnward2023()
        {

            double annualIncome = this.GetAnnualIncome();

            IncomeTax exempted = _currentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
              && x.ItemGroup == EnumIncomeTaxItemGroup.AnnualExemption && x.ItemID == (int)EnumIncomeTaxItemGroup.AnnualExemption); 

            if (exempted == null) exempted = this.Add(EnumIncomeTaxItemGroup.AnnualExemption,
                                                        (int)EnumIncomeTaxItemGroup.AnnualExemption, string.Empty, 0, 0,
                                                        EnumIncomeTaxSide.Dec_AnnualIncome);


            if (_employee.ForeignExPat && (_employee.JoiningDate - payrolltype.NextPayProcessDate).TotalDays <= 183) 
            {
                exempted.ThisMonthAmount = 0;
                exempted.PreviousAmount = 0;
                exempted.ProjectedAmount = 0;
                return;
            }

            if (annualIncome > 0)
            {
                exempted.ProjectedAmount = Math.Ceiling( (annualIncome / 3) * 1);
                if (exempted.ProjectedAmount > 450000)
                {
                    exempted.ProjectedAmount = 450000;
                }
            }

            exempted.TotalAmount = exempted.ProjectedAmount;
        }

        protected void CalculateExamtion()
        {
            this.CalculateExemptionOnward2023();
            return;
            #region get Examtion items from processItem
            var examtionItems = from pItem in _processItems
                                where pItem.ItemGroup == 7
                                select pItem;
            #endregion
            if(this._monthlyexemption ==null)
                this._monthlyexemption = new SystemConfigarationService().GetconfigBooleanValue(EnumConfigurationType.Logic, "incometax", "monthlyexemption");

            foreach (var processItem in examtionItems)
            {
                double tempAmount = 0;

                #region House rent allowance
                if (processItem.ItemCode == (int)EnumIncomeTaxItemGroup.Exemption_House_Rent_Allowance)
                {
                    //if (_employee.JoiningDate.Day > 1)
                    //    _employee.JoiningDate = new DateTime(_employee.JoiningDate.Year, _employee.JoiningDate.Month, 1);
                    IncomeTax basicItem = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID && 
                    x.ItemGroup == EnumIncomeTaxItemGroup.Basic_Salary && x.ItemID == (int) EnumIncomeTaxItemGroup.Basic_Salary);

                    IncomeTax HRItem = _currentYearTax.FirstOrDefault(x=> x.EmployeeID == _employee.ID && 
                    x.ItemGroup == EnumIncomeTaxItemGroup.House_Rent_Allowance && x.ItemID == (int)EnumIncomeTaxItemGroup.House_Rent_Allowance);
                    if (HRItem == null || HRItem.TotalAmount == 0) continue; //throw new ServiceException("House rent allowance not found in the collection while calculating HR Examtion");
                    //continue; //

                    IncomeTax HrExption = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID && 
                     x.ItemGroup ==  EnumIncomeTaxItemGroup.Exemption_House_Rent_Allowance && 
                      x.ItemID ==  (int)EnumIncomeTaxItemGroup.Exemption_House_Rent_Allowance);
                    if (HrExption == null) HrExption = this.Add(EnumIncomeTaxItemGroup.Exemption_House_Rent_Allowance,
                        (int)EnumIncomeTaxItemGroup.Exemption_House_Rent_Allowance, string.Empty, 0, 0, EnumIncomeTaxSide.Dec_SalaryIncome);
                    //if (oCycles != null && oCycles.Count>0)
                    //{
                    //    EmpLifeCycle cycle = oCycles.Find(x => x.IsContinue==true);
                    //    if (cycle != null)
                    //        _employee.JoiningDate = cycle.EffectDate;
                    //}
                    //if (_employee.JoiningDate < new DateTime(_taxParameter.FiscalyearDatefrom.Year, 7, 1))
                    //{
                    //    monthlyexemption = false;
                    //}
                    //else
                    this._monthlyexemption = true;

                    HrExption.ProjectedAmount = 0;
                    //HrExption.ThisMonthAmount = 0;
                    //HrExption.PreviousAmount = 0;
                    //HrExption.TotalAmount = 0;

                    if (this._monthlyexemption == false)
                    {
                        HrExption.ProjectedAmount = 0;
                        HrExption.ThisMonthAmount = 0;
                        HrExption.PreviousAmount = 0;
                        HrExption.TotalAmount = 0;
                        if (_taxParameter.MaxHRPercent != 0)
                        {
                            double hrAmount = (basicItem.TotalAmount * _taxParameter.MaxHRPercent) / 100;
                            double maxMonthlyAmount = (_taxParameter.MaxHRAmount / 12) * 12 - _projectedMonth;

                            if (hrAmount > _taxParameter.MaxHRAmount)
                                HrExption.ProjectedAmount = _taxParameter.MaxHRAmount;
                            else HrExption.ProjectedAmount = hrAmount;

                            if (HrExption.TotalAmount > HRItem.TotalAmount || Math.Abs(HrExption.TotalAmount - HRItem.TotalAmount) < 10)
                                HrExption.ProjectedAmount = HRItem.TotalAmount -
                                                         (HrExption.ThisMonthAmount + HrExption.PreviousAmount);
                        }
                        else
                        {
                            if (HRItem.TotalAmount > _taxParameter.MaxHRAmount)
                                HrExption.ProjectedAmount = _taxParameter.MaxHRAmount;
                            else HrExption.ProjectedAmount = HRItem.TotalAmount;

                            if (HrExption.TotalAmount > HRItem.TotalAmount || Math.Abs(HrExption.TotalAmount - HRItem.TotalAmount) < 10)
                                HrExption.ProjectedAmount = HRItem.TotalAmount -
                                                         (HrExption.ThisMonthAmount + HrExption.PreviousAmount);
                        }
                    }
                    else
                    {
                        //#region monthly Examption
                        //if (HRItem.TotalAmount > _taxParameter.MaxHRAmount)
                        //{
                        //    tempAmount = _taxParameter.MaxHRAmount - HrExption.PreviousAmount;
                        //    HrExption.ThisMonthAmount = tempAmount / (_projectedMonth + 1);
                        //    HrExption.ProjectedAmount = _taxParameter.MaxHRAmount -
                        //                                 (HrExption.ThisMonthAmount + HrExption.PreviousAmount);
                        //    if (HrExption.TotalAmount > _taxParameter.MaxHRAmount || Math.Abs(HrExption.TotalAmount - HRItem.TotalAmount) < 10)
                        //        HrExption.ProjectedAmount = HrExption.TotalAmount - _taxParameter.MaxHRAmount;
                        //}
                        //else
                        //{

                        double def = 0;
                        double nFracAmount = 0;
                        #region This code needed for only this month to calculate previous month
                        double maxMonthlyAmount = _taxParameter.MaxHRAmount / 12;

                        //if (HrExption.PreviousAmount == 0 && _employee.JoiningDate < new DateTime(_taxParameter.FiscalyearDatefrom.Year, 7, 1))
                        //{
                        //    if (maxMonthlyAmount * (SystemInformation.CurrentSysInfo.NextPayProcessDate.Month- _taxParameter.FiscalyearDatefrom.Month)  > HRItem.PreviousAmount)
                        //    {
                        //        HrExption.PreviousAmount = maxMonthlyAmount * (SystemInformation.CurrentSysInfo.NextPayProcessDate.Month - _taxParameter.FiscalyearDatefrom.Month);
                        //    }
                        //    else HrExption.PreviousAmount = HRItem.PreviousAmount;
                        //}
                        DateTime fromDate = _employee.JoiningDate;
                        DateTime todate = this.payrolltype.NextPayProcessDate;
                        if (_employee.JoiningDate < _taxParameter.FiscalyearDatefrom) fromDate = _taxParameter.FiscalyearDatefrom;

                        if (HrExption.PreviousAmount == 0) // that mean sytem started tax calculation middle of the fiscal year
                        {
                            if (HRItem.PreviousAmount > 0)
                            {
                                def = Global.DateFunctions.DateDiff("m", fromDate, GlobalFunctions.LastDateOfMonth(todate));
                                if (HRItem.PreviousAmount < maxMonthlyAmount * def)
                                    HrExption.PreviousAmount = HRItem.PreviousAmount;
                                else HrExption.PreviousAmount = maxMonthlyAmount * def;
                            }
                            else if (HRItem.PreviousAmount == 0 &&
                                    GlobalFunctions.FirstDateOfMonth(_employee.JoiningDate) < GlobalFunctions.FirstDateOfMonth(todate)) // New Joiner with Arrear
                            {
                                def = Global.DateFunctions.DateDiff("m", fromDate, GlobalFunctions.LastDateOfMonth(todate));
                                HrExption.PreviousAmount = maxMonthlyAmount * def;
                            }
                        }
                        //todate = _taxParameter.FiscalyearDateTo;
                        //if (_taxParameter.FiscalyearDatefrom < _employee.JoiningDate) fromDate = _employee.JoiningDate;
                        //if (_employee.EndOfContractDate != null && _employee.EndOfContractDate < _taxParameter.FiscalyearDateTo)
                        //    todate = (DateTime)_employee.EndOfContractDate;

                        //if (fromDate == GlobalFunctions.FirstDateOfMonth(_employee.JoiningDate))
                        //    def = Global.DateFunctions.DateDiff("m", fromDate, GlobalFunctions.LastDateOfMonth(todate)) + 1;
                        //else
                        //{
                        //    def = Global.DateFunctions.DateDiff("m", fromDate, GlobalFunctions.LastDateOfMonth(todate));
                        //    TimeSpan ts = GlobalFunctions.LastDateOfMonth(fromDate) - fromDate;
                        //    nFracAmount = (maxMonthlyAmount / (double)DateTime.DaysInMonth(fromDate.Year, fromDate.Month)) * ((double)ts.Days + 1);
                        //}
                        //              if(_employee.JoiningDate < new DateTime(2018, 2,1))
                        //HrExption.ProjectedAmount = (maxMonthlyAmount * def) + nFracAmount;


                        if (_employee.EndOfContractDate != null && _salary != null)
                        {
                            if (_salary.SalaryMonth > GlobalFunctions.FirstDateOfMonth((DateTime)_employee.EndOfContractDate)
                                && _salary.SalaryMonth <= GlobalFunctions.LastDateOfMonth((DateTime)_employee.EndOfContractDate))
                            {
                                maxMonthlyAmount = maxMonthlyAmount * GlobalFunctions.GetFractinalOfTillDate((DateTime)_employee.EndOfContractDate);

                            }
                        }

                        if (HRItem.ThisMonthAmount < maxMonthlyAmount)
                            maxMonthlyAmount = HRItem.ThisMonthAmount;

                        HrExption.ThisMonthAmount = maxMonthlyAmount;


                        double hrAmount = (basicItem.ProjectedAmount * _taxParameter.MaxHRPercent) / 100;

                        if (hrAmount > _taxParameter.MaxHRAmount / 12 * _projectedMonth)
                            HrExption.ProjectedAmount = _taxParameter.MaxHRAmount / 12 * _projectedMonth;
                        else HrExption.ProjectedAmount = hrAmount;

                        //if (hrAmount > _taxParameter.MaxHRAmount / 12 * Math.Ceiling(_projectedMonth))
                        //    HrExption.ProjectedAmount = _taxParameter.MaxHRAmount / 12 * Math.Ceiling(_projectedMonth);
                        //else HrExption.ProjectedAmount = hrAmount;



                        if (HrExption.TotalAmount > HRItem.TotalAmount || Math.Abs(HrExption.TotalAmount - HRItem.TotalAmount) < 10)
                            HrExption.ProjectedAmount = HRItem.TotalAmount -
                                                        (HrExption.ThisMonthAmount + HrExption.PreviousAmount);

                        if (HrExption.TotalAmount > _taxParameter.MaxHRAmount)
                        {
                            double excess = HrExption.TotalAmount - _taxParameter.MaxHRAmount;
                            HrExption.ProjectedAmount = HrExption.ProjectedAmount - excess;
                        }



                        //if (HRItem.ThisMonthAmount < maxMonthlyAmount)
                        //{
                        //    double nBasic = basicItem.ThisMonthAmount * def;
                        //    nBasic = (nBasic * 50) / 100;
                        //    if (HrExption.PreviousAmount < nBasic)
                        //        HrExption.PreviousAmount = nBasic;
                        //}
                        //#endregion

                        //if (maxMonthlyAmount < HRItem.ThisMonthAmount)
                        //{
                        //    HrExption.ThisMonthAmount = maxMonthlyAmount;
                        //    HrExption.ProjectedAmount = maxMonthlyAmount * _projectedMonth;
                        //}
                        //else
                        //{
                        //    HrExption.ThisMonthAmount = HRItem.ThisMonthAmount;
                        //    HrExption.ProjectedAmount = HRItem.ThisMonthAmount * _projectedMonth;

                        //    if (_salary != null && _salary.Details.Any(x => x.itemGroupCode == EnumSalaryGroup.UnauthLeave))
                        //    {
                        //        double unhraount = 0;
                        //        SalaryMonthlyDetail odt = _salary.Details.FirstOrDefault(x => x.itemGroupCode == EnumSalaryGroup.Gross
                        //            && x.ItemCode == EnumSalaryItemCode.Allowance && x.ItemID == 1);

                        //        if (odt != null)
                        //            unhraount = odt.ChangedAmount;
                        //        HrExption.ProjectedAmount = (unhraount + HRItem.ThisMonthAmount) * _projectedMonth;
                        //    }
                        //}

                        //    HrExption.ThisMonthAmount = HRItem.ThisMonthAmount;

                        //tempAmount = HRItem.TotalAmount - HrExption.PreviousAmount;
                        //HrExption.ThisMonthAmount = HRItem.ThisMonthAmount;
                        //HrExption.ProjectedAmount = HRItem.ProjectedAmount;
                        //if (HrExption.TotalAmount > HRItem.TotalAmount || Math.Abs(HrExption.TotalAmount - HRItem.TotalAmount) < 10)
                        //    HrExption.ProjectedAmount = HRItem.TotalAmount -
                        //                             (HrExption.ThisMonthAmount + HrExption.PreviousAmount);
                        //}
                        #endregion monthly Examption
                    }
                    HrExption.ThisMonthAmount = GlobalFunctions.Round(HrExption.ThisMonthAmount);
                    HrExption.ProjectedAmount = GlobalFunctions.Round(HrExption.ProjectedAmount);
                    HrExption.TotalAmount = HrExption.ThisMonthAmount + HrExption.PreviousAmount + HrExption.ProjectedAmount;

                    //if (_employee.JoiningDate < new DateTime(_taxParameter.FiscalyearDatefrom.Year, 7, 1))
                    //{
                    //    HrExption.ThisMonthAmount = GlobalFunctions.Round(HrExption.ThisMonthAmount);
                    //    HrExption.ProjectedAmount = GlobalFunctions.Round(HrExption.ProjectedAmount);
                    //    HrExption.TotalAmount = HrExption.ThisMonthAmount + HrExption.PreviousAmount + HrExption.ProjectedAmount;

                    //}
                    //else
                    //{
                    //    HrExption.ThisMonthAmount = 0;
                    //    HrExption.ProjectedAmount = 0;

                    //}
                    //DataSet ds = IncomeTax.GetTaxAdj(EnumIncomeTaxItemGroup.Exemption_House_Rent_Allowance, (int)EnumIncomeTaxItemGroup.Exemption_House_Rent_Allowance, _employee.ID);
                    //if (ds != null && ds.Tables.Count > 0)
                    //{
                    //    foreach (DataRow dr in ds.Tables[0].Rows)
                    //    {
                    //        HrExption.PreviousAmount = Convert.ToDouble(dr[4].ToString());
                    //    }
                    //}
                    //HrExption.TotalAmount = HrExption.PreviousAmount;
                }
                #endregion House rent allowance

                #region Conveyance Allowance Examtion
                else if (processItem.ItemCode == (int)EnumIncomeTaxItemGroup.Exemption_Conveyance_Allowance)
                {
                    IncomeTax CnvItem = _currentYearTax.FirstOrDefault(x=>x.EmployeeID== _employee.ID && 
                       x.ItemGroup == EnumIncomeTaxItemGroup.Conveyance_Allowance && x.ItemID == (int)EnumIncomeTaxItemGroup.Conveyance_Allowance);
                    if (CnvItem == null || CnvItem.TotalAmount == 0) continue;

                    IncomeTax CvExption = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID &&  
                     x.ItemGroup ==   EnumIncomeTaxItemGroup.Exemption_Conveyance_Allowance && x.ItemID == (int)EnumIncomeTaxItemGroup.Exemption_Conveyance_Allowance);
                    if (CvExption == null) CvExption = this.Add(EnumIncomeTaxItemGroup.Exemption_Conveyance_Allowance, (int)EnumIncomeTaxItemGroup.Exemption_Conveyance_Allowance, string.Empty, 0, 0, EnumIncomeTaxSide.Dec_SalaryIncome);

                    if (this._monthlyexemption == false)
                    {
                        CvExption.TotalAmount = 0;
                        CvExption.ProjectedAmount = 0;
                        CvExption.PreviousAmount = 0;
                        CvExption.ThisMonthAmount = 0;
                        if (CnvItem.TotalAmount > _taxParameter.MaxConvAmount || Math.Abs(CnvItem.TotalAmount - _taxParameter.MaxConvAmount) < 10)
                            CvExption.ProjectedAmount = _taxParameter.MaxConvAmount;
                        else CvExption.ProjectedAmount = CnvItem.TotalAmount;

                    }
                    else
                    {
                        if (CnvItem.TotalAmount > _taxParameter.MaxConvAmount)
                            CvExption.ThisMonthAmount = _taxParameter.MaxConvAmount / 12;
                        else CvExption.ThisMonthAmount = CnvItem.ThisMonthAmount;
                        if (CnvItem.TotalAmount > _taxParameter.MaxConvAmount || Math.Abs(CnvItem.TotalAmount - _taxParameter.MaxConvAmount) < 10)
                        {
                            CvExption.ProjectedAmount = _taxParameter.MaxConvAmount - (
                                                    CvExption.ThisMonthAmount + CvExption.PreviousAmount);
                        }
                        else
                        {
                            CvExption.ProjectedAmount = CnvItem.TotalAmount - (
                                                    CvExption.ThisMonthAmount + CvExption.PreviousAmount);
                        }
                    }
                    CvExption.Side = EnumIncomeTaxSide.Dec_SalaryIncome;
                    CvExption.ThisMonthAmount = GlobalFunctions.Round(CvExption.ThisMonthAmount);
                    CvExption.ProjectedAmount = GlobalFunctions.Round(CvExption.ProjectedAmount);

                    CvExption.TotalAmount = CvExption.ThisMonthAmount + CvExption.PreviousAmount + CvExption.ProjectedAmount;

                }
                #endregion Conveyance Allowance Examtion

                #region Other Allowance Examption
                else if (processItem.ItemCode == (int)EnumIncomeTaxItemGroup.Exemption_Medical_Allowance)
                {
                    IncomeTax MedicalItem = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID && 
                     x.ItemGroup ==  EnumIncomeTaxItemGroup.Medical_Allowance && x.ItemID == (int)EnumIncomeTaxItemGroup.Medical_Allowance);
                    if (MedicalItem == null) continue;   //throw new ServiceException("Conveyance allowance not found in the collection while calculating HR Examtion");

                    IncomeTax mdExption = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID && 
                    x.ItemGroup == EnumIncomeTaxItemGroup.Exemption_Medical_Allowance && x.ItemID == (int)EnumIncomeTaxItemGroup.Exemption_Medical_Allowance);
                    if (mdExption == null) mdExption = this.Add(EnumIncomeTaxItemGroup.Exemption_Medical_Allowance, (int)EnumIncomeTaxItemGroup.Exemption_Medical_Allowance, string.Empty, 0, 0, EnumIncomeTaxSide.Dec_SalaryIncome);

                    IncomeTax basicItem =  _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID && 
                    x.ItemGroup == EnumIncomeTaxItemGroup.Basic_Salary && x.ItemID == (int)EnumIncomeTaxItemGroup.Basic_Salary);

                    //Sumon on 24 June 2014
                    double nMamount = 0;
                    if (basicItem != null) nMamount = basicItem.TotalAmount *
                        (double)((_taxParameter.MaxMedicalPercent != 0) ? _taxParameter.MaxMedicalPercent / 100 : 0);

                    if (MedicalItem == null || MedicalItem.TotalAmount == 0)
                        mdExption.ProjectedAmount = 0.00;
                    else if (nMamount > _taxParameter.MaxMedicalAmount)
                        mdExption.ProjectedAmount = MedicalItem.TotalAmount < _taxParameter.MaxMedicalAmount ? MedicalItem.TotalAmount : GlobalFunctions.Round(_taxParameter.MaxMedicalAmount);
                    else
                        mdExption.ProjectedAmount = MedicalItem.TotalAmount > nMamount ? GlobalFunctions.Round(nMamount) : MedicalItem.TotalAmount;
                    //End

                    //mdExption.ProjectedAmount =GlobalFunctions.Round(MedicalItem.TotalAmount);
                    mdExption.TotalAmount = mdExption.ThisMonthAmount + mdExption.PreviousAmount + mdExption.ProjectedAmount;
                    mdExption.Side = EnumIncomeTaxSide.Dec_SalaryIncome;
                    // this.Add(mdExption);
                }
                else if (processItem.ItemCode == (int)EnumIncomeTaxItemGroup.Exemption_LFA_Allowance)
                {
                    IncomeTax LFAItem = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID && 
                    x.ItemGroup == EnumIncomeTaxItemGroup.LFA_Allowance && x.ItemID == (int)EnumIncomeTaxItemGroup.LFA_Allowance);
                    if (LFAItem == null) continue;// throw new ServiceException("LFA allowance not found in the collection while calculating HR Examtion");
                    //continue;   //
                    IncomeTax lfaExption = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID 
                    && x.ItemGroup == EnumIncomeTaxItemGroup.Exemption_LFA_Allowance && x.ItemID == (int)EnumIncomeTaxItemGroup.Exemption_LFA_Allowance);
                    if (lfaExption == null) lfaExption = this.Add(EnumIncomeTaxItemGroup.Exemption_LFA_Allowance, (int)EnumIncomeTaxItemGroup.Exemption_LFA_Allowance, string.Empty, 0, 0, EnumIncomeTaxSide.Dec_SalaryIncome);

                    lfaExption.ProjectedAmount = GlobalFunctions.Round(LFAItem.TotalAmount);
                    lfaExption.TotalAmount = lfaExption.ThisMonthAmount + lfaExption.PreviousAmount + lfaExption.ProjectedAmount;

                    lfaExption.Side = EnumIncomeTaxSide.Dec_SalaryIncome;
                    // this.Add(mdExption);
                }
                else if (processItem.ItemCode == (int)EnumIncomeTaxItemGroup.WPPF_Examption)
                {
                    IncomeTax wppfItem = _currentYearTax.FirstOrDefault(x=>x.EmployeeID ==_employee.ID &&  
                    x.ItemGroup == EnumIncomeTaxItemGroup.WPPF_Allowance && x.ItemID == (int)EnumIncomeTaxItemGroup.WPPF_Allowance);
                    if (wppfItem == null) continue;// throw new ServiceException("LFA allowance not found in the collection while calculating HR Examtion");
                    //continue;   //
                    IncomeTax wppfExption = _currentYearTax.FirstOrDefault(x=>x.EmployeeID== _employee.ID 
                    && x.ItemGroup == EnumIncomeTaxItemGroup.WPPF_Examption && x.ItemID == (int)EnumIncomeTaxItemGroup.WPPF_Examption);
                    if (wppfExption == null) wppfExption = this.Add(EnumIncomeTaxItemGroup.WPPF_Examption, (int)EnumIncomeTaxItemGroup.WPPF_Examption, string.Empty, 0, 0, EnumIncomeTaxSide.Dec_SalaryIncome);

                    double exception = wppfItem.TotalAmount;
                    if (wppfItem.TotalAmount > 50000) exception = 50000;

                    wppfExption.ProjectedAmount = GlobalFunctions.Round(exception);
                    //wppfExption.ThisMonthAmount = 0; // need to remove
                    //wppfExption.PreviousAmount = 0;// need to remove
                    wppfExption.TotalAmount = wppfExption.ProjectedAmount;
                    wppfExption.Side = EnumIncomeTaxSide.Dec_SalaryIncome;
                }
                #endregion Other Allowance Examption
            }
        }
        protected void CalculateCPF()
        {
            if (_employee.PFMemberType != EnumPFMembershipType.Live) return;
            IncomeTax pfItem = _currentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID &&
            x.ItemGroup == EnumIncomeTaxItemGroup.Company_Contri_PF && x.ItemID == (int)EnumIncomeTaxItemGroup.Company_Contri_PF);
            if (pfItem == null) pfItem = this.Add(EnumIncomeTaxItemGroup.Company_Contri_PF, (int)EnumIncomeTaxItemGroup.Company_Contri_PF, string.Empty, 0, 0, EnumIncomeTaxSide.Inc_AnnualIncome);

            IncomeTax BasicItem = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID 
            && x.ItemGroup == EnumIncomeTaxItemGroup.Basic_Salary && x.ItemID == (int)EnumIncomeTaxItemGroup.Basic_Salary);

            if (BasicItem == null) return;

            if (_salary != null)
                pfItem.ThisMonthAmount = _salary.GetDeductAmount(EnumSalaryItemCode.PF_Contribution, (int)EnumSalaryItemCode.PF_Contribution);
            else
            {
                pfItem.ThisMonthAmount = (BasicItem.ThisMonthAmount
                * this.payrolltype.pFContriCompany) / 100;
            }

            pfItem.ProjectedAmount = (BasicItem.ProjectedAmount
                * this.payrolltype.pFContriCompany) / 100;

            pfItem.ThisMonthAmount = GlobalFunctions.Round(pfItem.ThisMonthAmount);
            pfItem.ProjectedAmount = GlobalFunctions.Round(pfItem.ProjectedAmount);

        }

        //protected void CalculateUpdateBonusProjection(double nAmount)
        //{

        //    if (_employee.ForeignExPat == true) return;
        //    List<FestivalBonusProjection> taxProjections = FestivalBonusProjection.Get(EnumStatus.Active);

        //    IncomeTax pfItem = IncomeTax.Get(_currentYearTax, _employee.ID, EnumIncomeTaxItemGroup.Bonus, (int)EnumIncomeTaxItemGroup.Bonus);
        //    if (pfItem == null) pfItem = this.Add(EnumIncomeTaxItemGroup.Bonus, (int)EnumIncomeTaxItemGroup.Bonus, "Festival Bonus", 0, 0, EnumIncomeTaxSide.Inc_SalaryIncome);
        //    pfItem.ProjectedAmount = nAmount + pfItem.ProjectedAmount;
        //    if (pfItem.ProjectedAmount <= 0)
        //        pfItem.ProjectedAmount = 0;
        //    pfItem.ProjectedAmount = GlobalFunctions.Round(pfItem.ProjectedAmount);

        //}

        protected void CalculateBonusProjection()
        {

            #region  Bonus projetion Management
            List<BonusParameter> oparams = null;
            if (_projectionBonusParams == null)
            {
                _projectionBonusParams = new List<BonusParameter>();
                List<BonusParameter> ops = new BonusParameterService().Get(EnumStatus.Active, this.payrolltype.ID);
                foreach (BonusParameter oitem in ops)

                    if (oitem.IsProjectInTaxCalculation == true)
                    {
                        _projectionBonusParams.Add(oitem);
                    }
            }

            if (_projectionBonusParams == null || _projectionBonusParams.Count == 0) return;
            oparams = new BonusParameterService().GetApplicableParameters(_employee, (int) _employee.GradeID, _projectionBonusParams);
            if (oparams == null) return;

            _ApplicableBonusParams = oparams;



            foreach (BonusParameter item in oparams)
            {
                IncomeTax pfItem = GetTaxItem(EnumTaxMergeType.Bonus, item.BonusID, item.BonusName);
                pfItem.Side = EnumIncomeTaxSide.Inc_SalaryIncome;

                if (pfItem == null) pfItem = this.Add(EnumIncomeTaxItemGroup.Bonus,
                    (int)EnumIncomeTaxItemGroup.Bonus, item.BonusName, 0, 0, EnumIncomeTaxSide.Inc_SalaryIncome);


                // pfItem = _currentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID &&
                //x.ItemGroup == EnumIncomeTaxItemGroup.Bonus && x.ItemID == item.BonusID);

                //if (pfItem == null) pfItem = this.Add(EnumIncomeTaxItemGroup.Bonus, 
                //    (int)EnumIncomeTaxItemGroup.Bonus, item.BonusName , 0, 0, EnumIncomeTaxSide.Inc_SalaryIncome);

                BonusCalculator ocal = new BonusCalculator();
                double bonusAmount = pfItem.ProjectedAmount + ocal.CalcluateBonus(item, _employee, _employee.BasicSalary, _employee.GrossSalary,
                        Global.DateFunctions.LastDateOfYear(payrolltype.NextPayProcessDate));

                pfItem.ProjectedAmount = 0;
                //First Project Month
                if (bonusAmount >0 && item.firstProjectMonth != null && item.firstProjectMonth > payrolltype.NextPayProcessDate)
                {
                    if(item.secondProjectMonth !=null)
                        pfItem.ProjectedAmount = bonusAmount / 2;
                    else pfItem.ProjectedAmount = bonusAmount;
                }
                if (bonusAmount > 0 && item.secondProjectMonth != null && item.secondProjectMonth > payrolltype.NextPayProcessDate)
                {
                    pfItem.ProjectedAmount = pfItem.ProjectedAmount + bonusAmount / 2;
                }

                if (payrolltype.NextPayProcessDate.Month == 6) // Forcely zero on month Jun
                    pfItem.ProjectedAmount = 0;

                if (pfItem.ProjectedAmount <= 0)
                    pfItem.ProjectedAmount = 0;

                pfItem.ProjectedAmount = GlobalFunctions.Round(pfItem.ProjectedAmount);

                this.Add(pfItem);
            }


            #endregion



        }

        protected void CalculateInvestment()
        {

            IncomeTax InvestmentItem = _currentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID &&
               x.ItemGroup == EnumIncomeTaxItemGroup.Tax_Credit_On_Investment && x.ItemID == (int)EnumIncomeTaxItemGroup.Tax_Credit_On_Investment);
            if (InvestmentItem == null) InvestmentItem = this.Add(EnumIncomeTaxItemGroup.Tax_Credit_On_Investment, (int)EnumIncomeTaxItemGroup.Tax_Credit_On_Investment, string.Empty, 0, 0, EnumIncomeTaxSide.Dec_GrossTax);

            if (_employee.ForeignExPat == true) return;

            if (this._investmentwithoutpf == null)
                this._investmentwithoutpf = new SystemConfigarationService().GetconfigBooleanValue(EnumConfigurationType.Logic, "incometax", "investmentwithoutpf");

            IncomeTax AnnualItem = null;
            double nExemptedAmount = 0;
            //if (this._investmentwithoutpf==true)
            //{
            //    AnnualItem = _currentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID && x.ItemGroup == EnumIncomeTaxItemGroup.Annual_Salary_Income
            //                                           && x.ItemID == (int)EnumIncomeTaxItemGroup.Annual_Salary_Income);

            //    IncomeTax ExemptedItem = _currentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID && x.ItemGroup == EnumIncomeTaxItemGroup.AnnualExemption
            //                                          && x.ItemID == (int)EnumIncomeTaxItemGroup.AnnualExemption);
            //    if (ExemptedItem != null)
            //    {
            //        nExemptedAmount = ExemptedItem.TotalAmount;
            //    }

            //}
            //else
            AnnualItem = _currentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID && x.ItemGroup == EnumIncomeTaxItemGroup.Annual_Income
                                                   && x.ItemID == (int)EnumIncomeTaxItemGroup.Annual_Income);

            double investmentCanBeShown = (((AnnualItem.TotalAmount - nExemptedAmount) * _taxParameter.MaxInvestPercent) / 100);


            if (investmentCanBeShown > _taxParameter.MaxInvAmount) investmentCanBeShown = _taxParameter.MaxInvAmount;
            double investAmount = investmentCanBeShown;
            _isActualInvestment = false;
            if (this.payrolltype.ActualTaxInvestment == true)
            {
                _taxParameter.InvestmentActiveMonth = _taxParameter.FiscalyearDatefrom;
                _isActualInvestment = true;
            }

            if (_isActualInvestment == false && _taxParameter.InvestmentActiveMonth == null) _isActualInvestment = false;
            else
            {
                DateTime investmonth = new DateTime(_taxParameter.FiscalyearDatefrom.Year, ((DateTime)_taxParameter.InvestmentActiveMonth).Month, 1);
                investmonth = GlobalFunctions.LastDateOfMonth(investmonth);
                if (investmonth <= this.payrolltype.NextPayProcessDate)
                    _isActualInvestment = true;
            }

            if (_isActualInvestment == true)  // payroll type wise Actual investment date is different, so this done in temporary basis
            {
                IncomeTax ActualInvestment = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID && 
                           x.ItemGroup == EnumIncomeTaxItemGroup.Investment_Actual && x.ItemID == (int)EnumIncomeTaxItemGroup.Investment_Actual);

                if (ActualInvestment == null)
                    ActualInvestment = this.Add(EnumIncomeTaxItemGroup.Investment_Actual, (int)EnumIncomeTaxItemGroup.Investment_Actual, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_Info_Item);

                IncomeTax pfItem = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID && x.ItemGroup == EnumIncomeTaxItemGroup.Company_Contri_PF 
                                                              && x.ItemID ==  (int)EnumIncomeTaxItemGroup.Company_Contri_PF);
                investAmount = 0;
                if (pfItem != null)
                    investAmount = investAmount + (pfItem.TotalAmount * 2);
                if (this._investmentTypes == null) this._investmentTypes = new TaxInvestmentService().Get(EnumStatus.Regardless);
                if (this._empTaxInvestments == null) this._empTaxInvestments = new EmployeeTaxInvestmentService().GetByTaxParamID(this._taxParameter.ID);
                double nactualInvt = EmployeeTaxInvestment.GetAmount(this._employee.ID, _empTaxInvestments, _investmentTypes);
                investAmount = investAmount + nactualInvt;

                ActualInvestment.ProjectedAmount = nactualInvt;
                ActualInvestment.TotalAmount = nactualInvt;
            }

            IncomeTax InvestmentAllowed = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID && x.ItemGroup == EnumIncomeTaxItemGroup.Investment_Allowed
                                            && x.ItemID ==    (int)EnumIncomeTaxItemGroup.Investment_Allowed);
            if (InvestmentAllowed == null) InvestmentAllowed = this.Add(EnumIncomeTaxItemGroup.Investment_Allowed,
                                                    (int)EnumIncomeTaxItemGroup.Investment_Allowed, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_Info_Item);

            InvestmentAllowed.ProjectedAmount = GlobalFunctions.Round(investmentCanBeShown);
            InvestmentAllowed.TotalAmount = GlobalFunctions.Round(investmentCanBeShown);

            if (investAmount > investmentCanBeShown)
                investAmount = investmentCanBeShown;

            #region Rebate
            double taxCredit = 0;
            double nTempRebate = (investAmount * _taxParameter.MaxInvExempPercent) / 100;
            if (nTempRebate > (AnnualItem.TotalAmount * .03))
                nTempRebate = AnnualItem.TotalAmount * .03;
            if (nTempRebate > 1000000)
                nTempRebate = 1000000;
            taxCredit = nTempRebate;
            #endregion

            InvestmentItem.ProjectedAmount = GlobalFunctions.Round(taxCredit);
            InvestmentItem.TotalAmount = GlobalFunctions.Round(taxCredit);
        }

        protected void CmpProvidedHouseAndTransport(DateTime month)
        {
            try
            {
                if (_assignedHeads == null) return;

                List<ITEmpHead> Items = _assignedHeads.FindAll(x=>x.EmployeeID == _employee.ID);
                if (Items == null || Items.Count == 0) return;

                DateTime fromDate = GlobalFunctions.FirstDateOfMonth(month);
                DateTime toDate = GlobalFunctions.LastDateOfMonth(month);
                bool bvalid = false;

                IncomeTax basicSalaryItem = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID
                                       && x.ItemGroup == EnumIncomeTaxItemGroup.Basic_Salary
                                       && x.ItemID ==    (int)EnumIncomeTaxItemGroup.Basic_Salary);

                if (basicSalaryItem == null) throw new ServiceException("Basic salary item not found in the collection on "
                                                       + " calculating Company provided Car/HouseRent of the Employee No:" + _employee.EmployeeNo);
                double tempAmount = 0;
                double carparcent = ((double)5 / (double)100);
                double hrPercent = ((double)25 / (double)100);
                foreach (ITEmpHead item in Items)
                {
                    IncomeTax taxItem;
                    bvalid = false;
                    if (item.StartDate <= fromDate && item.EndDate >= fromDate) bvalid = true;
                    else bvalid = false;
                    if (item.StartDate <= toDate && item.EndDate >= toDate) bvalid = true;
                    else bvalid = false;
                    if (item.StartDate >= fromDate) { fromDate = item.StartDate; }
                    if (item.EndDate <= toDate) { toDate = item.EndDate; }

                    if (bvalid == false) continue;
                    #region Calculate Car calculation
                    if (item.HeadID == EnumIncomeTaxHead.Car)
                    {
                        taxItem = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID
                                       && x.ItemGroup ==  EnumIncomeTaxItemGroup.Cmp_Provided_car
                                       && x.ItemID ==     (int)EnumIncomeTaxItemGroup.Cmp_Provided_car);
                        if (taxItem == null) taxItem = this.Add(EnumIncomeTaxItemGroup.Cmp_Provided_car,
                                                            (int)EnumIncomeTaxItemGroup.Cmp_Provided_car, "Company provided car", 0, 0, EnumIncomeTaxSide.Inc_SalaryIncome);

                        tempAmount = item.HouseRent;
                        if (item.EndDate >= _taxParameter.FiscalyearDateTo) toDate = _taxParameter.FiscalyearDateTo;
                        taxItem.ThisMonthAmount = tempAmount;

                        toDate = item.EndDate;
                        if (item.EndDate > _taxParameter.FiscalyearDateTo) toDate = _taxParameter.FiscalyearDateTo;

                        if (_employee.EndOfContractDate != null && _employee.EndOfContractDate < toDate)
                            toDate = Convert.ToDateTime(_employee.EndOfContractDate);


                        //if (_projectedMonth == 0) tempAmount = basicSalaryItem.ProjectedAmount;
                        //else tempAmount = basicSalaryItem.ProjectedAmount / _projectedMonth;

                        if (toDate == GlobalFunctions.LastDateOfMonth(toDate))
                            taxItem.ProjectedAmount = (tempAmount * (Global.DateFunctions.DateDiff("m", GlobalFunctions.LastDateOfMonth(month).AddDays(1), toDate) + 1) );
                        else
                            taxItem.ProjectedAmount = (tempAmount * GlobalFunctions.GetFraction(GlobalFunctions.LastDateOfMonth(month).AddDays(1), toDate)) ;

                        taxItem.ProjectedAmount = GlobalFunctions.Round(taxItem.ProjectedAmount);

                        if(taxItem.TotalAmount <120000)
                        {
                            taxItem.ProjectedAmount = 120000 - (taxItem.PreviousAmount + taxItem.ThisMonthAmount);
                        }
                    }
                    #endregion Calculate Car calculation

                    #region Calculate House rent calculation
                    if (item.HeadID == EnumIncomeTaxHead.House)
                    {
                        taxItem = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID 
                                       && x.ItemGroup == EnumIncomeTaxItemGroup.Cmp_Provided_House
                                       && x.ItemID ==     (int)EnumIncomeTaxItemGroup.Cmp_Provided_House);
                        if (taxItem == null) taxItem = this.Add(EnumIncomeTaxItemGroup.Cmp_Provided_House,
                                                            (int)EnumIncomeTaxItemGroup.Cmp_Provided_House, "Company provided House", 0, 0, EnumIncomeTaxSide.Inc_SalaryIncome);


                        if (item.HouseRent == 0)
                        {
                            if (_salary == null)
                                tempAmount = basicSalaryItem.ThisMonthAmount;
                            else
                            {
                                SalaryMonthlyDetail detail = _salary.Details.FirstOrDefault(x=>x.itemGroupCode == EnumSalaryGroup.Gross
                                    && x.ItemCode == EnumSalaryItemCode.Basic_Salary && x.ItemID == (int)EnumSalaryItemCode.Basic_Salary);
                                if (detail == null) continue;
                                tempAmount = detail.ChangedAmount;
                                #region basic salary arrear effect
                                foreach (EmployeeGradeSalary gse in _salary.ArrearGradeSalaries)
                                {
                                    if (gse.TillDate > item.StartDate)
                                    {
                                        if (item.StartDate > gse.EffectDate)
                                            tempAmount = tempAmount + gse.BasicSalary *
                                                   GlobalFunctions.GetFraction(item.StartDate, (DateTime)gse.TillDate);
                                        else
                                        {
                                            SalaryMonthlyDetail arreardetail = _salary.Details.FirstOrDefault(x=>x.itemGroupCode == EnumSalaryGroup.Arrear
                                            && x.ItemCode == EnumSalaryItemCode.Basic_Salary && x.ItemID == (int)EnumSalaryItemCode.Basic_Salary);
                                            if (arreardetail != null)
                                            {
                                                tempAmount = tempAmount + arreardetail.ChangedAmount;
                                            }
                                        }
                                    }
                                }

                                foreach (EmployeeGradeSalary gse in _salary.ArrearPaidGradeSalaries)
                                {
                                    if (gse.TillDate > item.StartDate)
                                    {
                                        if (item.StartDate > gse.EffectDate)
                                            tempAmount = tempAmount - gse.BasicSalary *
                                                   GlobalFunctions.GetFraction(item.StartDate, (DateTime)gse.TillDate);
                                        else
                                            tempAmount = tempAmount - gse.BasicSalary *
                                                   GlobalFunctions.GetFraction(gse.EffectDate, (DateTime)gse.TillDate);
                                    }
                                }
                                #endregion basic salary arrear effect
                            }
                            taxItem.ThisMonthAmount = GlobalFunctions.Round(tempAmount * hrPercent);
                        }
                        else
                            taxItem.ThisMonthAmount = GlobalFunctions.Round(GlobalFunctions.GetFraction(fromDate, toDate) * item.HouseRent);

                        //if (item.EndDate <= toDate) continue;
                        //toDate = item.EndDate;
                        if (item.EndDate >= _taxParameter.FiscalyearDateTo) toDate = _taxParameter.FiscalyearDateTo;
                        if (item.HouseRent == 0)
                        {
                            if (_projectedMonth == 0)
                                tempAmount = basicSalaryItem.ProjectedAmount;
                            else tempAmount = basicSalaryItem.ProjectedAmount / _projectedMonth;

                            if (toDate == GlobalFunctions.LastDateOfMonth(toDate))
                                taxItem.ProjectedAmount = (tempAmount * (Global.DateFunctions.DateDiff("m", GlobalFunctions.LastDateOfMonth(month).AddDays(1), toDate) + 1) * hrPercent);
                            else
                                taxItem.ProjectedAmount = (tempAmount * GlobalFunctions.GetFraction(GlobalFunctions.LastDateOfMonth(month).AddDays(1), toDate)) * hrPercent;

                            taxItem.ProjectedAmount = GlobalFunctions.Round(taxItem.ProjectedAmount);
                        }
                        else
                        {
                            taxItem.ProjectedAmount = GlobalFunctions.GetFraction(
                                GlobalFunctions.LastDateOfMonth(month).AddDays(1), toDate) * item.HouseRent;
                            taxItem.ProjectedAmount = GlobalFunctions.Round(taxItem.ProjectedAmount);
                        }

                        taxItem.Side = EnumIncomeTaxSide.Inc_SalaryIncome;
                    }
                    #endregion Calculate Car calculation
                }
            }
            catch (ServiceException ex)
            {
                throw new ServiceException(ex.Message);
            }
            catch (Exception ex)
            {
                throw new ServiceException(ex.Message);
            }

        }
        private double GetTotalSalary()
        {
            double TotGross;
            double TotExemp;
            TotGross = 0; TotExemp = 0;
            foreach (IncomeTax item in _currentYearTax)
            {
                if (item.Side == EnumIncomeTaxSide.Dec_SalaryIncome)
                    TotExemp = TotExemp + item.TotalAmount;
                else if (item.Side == EnumIncomeTaxSide.Inc_SalaryIncome)
                    TotGross = TotGross + item.TotalAmount;
            }
            return TotGross - TotExemp;
        }

        protected double GetAnnualIncome()
        {
            double TotIncome = 0;
            foreach (IncomeTax item in _currentYearTax)
            {
                if (item.Side == EnumIncomeTaxSide.Inc_AnnualIncome)
                    TotIncome = TotIncome + item.TotalAmount;
                else if (item.Side == EnumIncomeTaxSide.Dec_AnnualIncome)
                    TotIncome = TotIncome - item.TotalAmount;
            }
            TotIncome = this.GetTotalSalary() + TotIncome;
            return TotIncome;
        }

        protected void CalculateTotalIncome()
        {
            IncomeTax salaryIncome = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID &&
                x.ItemGroup == EnumIncomeTaxItemGroup.Annual_Salary_Income && x.ItemID == (int)EnumIncomeTaxItemGroup.Annual_Salary_Income);
            if (salaryIncome == null) salaryIncome = this.Add(EnumIncomeTaxItemGroup.Annual_Salary_Income,
                                                        (int)EnumIncomeTaxItemGroup.Annual_Salary_Income, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_fixed_Item);
            salaryIncome.TotalAmount = 0;
            salaryIncome.PreviousAmount = 0;
            salaryIncome.ThisMonthAmount = 0;
            salaryIncome.ProjectedAmount = 0;
            foreach (IncomeTax item in _currentYearTax)
            {
                if (item.Side == EnumIncomeTaxSide.Inc_SalaryIncome)
                {
                    salaryIncome.PreviousAmount = salaryIncome.PreviousAmount + item.PreviousAmount;
                    salaryIncome.ThisMonthAmount = salaryIncome.ThisMonthAmount + item.ThisMonthAmount;
                    salaryIncome.ProjectedAmount = salaryIncome.ProjectedAmount + item.ProjectedAmount;
                    salaryIncome.TotalAmount = salaryIncome.TotalAmount + item.TotalAmount;
                }
                else if (item.Side == EnumIncomeTaxSide.Dec_SalaryIncome)
                {
                    salaryIncome.PreviousAmount = salaryIncome.PreviousAmount - item.PreviousAmount;
                    salaryIncome.ThisMonthAmount = salaryIncome.ThisMonthAmount - item.ThisMonthAmount;
                    salaryIncome.ProjectedAmount = salaryIncome.ProjectedAmount - item.ProjectedAmount;
                    salaryIncome.TotalAmount = salaryIncome.TotalAmount - item.TotalAmount;
                }
            }

            salaryIncome.PreviousAmount = GlobalFunctions.Round(salaryIncome.PreviousAmount);
            salaryIncome.ThisMonthAmount = GlobalFunctions.Round(salaryIncome.ThisMonthAmount);
            salaryIncome.ProjectedAmount = GlobalFunctions.Round(salaryIncome.ProjectedAmount);

            IncomeTax annualIncome = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID 
                        && x.ItemGroup == EnumIncomeTaxItemGroup.Annual_Income && x.ItemID == (int)EnumIncomeTaxItemGroup.Annual_Income);
            if (annualIncome == null) annualIncome = this.Add(EnumIncomeTaxItemGroup.Annual_Income,
                                                        (int)EnumIncomeTaxItemGroup.Annual_Income, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_fixed_Item);

            annualIncome.TotalAmount = 0;
            annualIncome.PreviousAmount = 0;
            annualIncome.ThisMonthAmount = 0;
            annualIncome.ProjectedAmount = 0;
            foreach (IncomeTax item in _currentYearTax)
            {
                if (item.Side == EnumIncomeTaxSide.Inc_AnnualIncome)
                {
                    annualIncome.PreviousAmount = annualIncome.PreviousAmount + item.PreviousAmount;
                    annualIncome.ThisMonthAmount = annualIncome.ThisMonthAmount + item.ThisMonthAmount;
                    annualIncome.ProjectedAmount = annualIncome.ProjectedAmount + item.ProjectedAmount;
                    annualIncome.TotalAmount = annualIncome.TotalAmount + item.TotalAmount;
                }
                else if (item.Side == EnumIncomeTaxSide.Dec_AnnualIncome)
                {
                    annualIncome.PreviousAmount = annualIncome.PreviousAmount - item.PreviousAmount;
                    annualIncome.ThisMonthAmount = annualIncome.ThisMonthAmount - item.ThisMonthAmount;
                    annualIncome.ProjectedAmount = annualIncome.ProjectedAmount - item.ProjectedAmount;
                    annualIncome.TotalAmount = annualIncome.TotalAmount - item.TotalAmount;

                }
            }

            annualIncome.PreviousAmount = annualIncome.PreviousAmount + salaryIncome.PreviousAmount;
            annualIncome.ThisMonthAmount = annualIncome.ThisMonthAmount + salaryIncome.ThisMonthAmount;
            annualIncome.ProjectedAmount = annualIncome.ProjectedAmount + salaryIncome.ProjectedAmount;
            annualIncome.TotalAmount = annualIncome.TotalAmount + salaryIncome.TotalAmount;

            annualIncome.PreviousAmount = GlobalFunctions.Round(annualIncome.PreviousAmount);
            annualIncome.ThisMonthAmount = GlobalFunctions.Round(annualIncome.ThisMonthAmount);
            annualIncome.ProjectedAmount = GlobalFunctions.Round(annualIncome.ProjectedAmount);
        }
        protected double GetTaxRebate()
        {
            double TotIncome = 0;
            foreach (IncomeTax item in _currentYearTax)
            {
                if (item.ItemGroup == EnumIncomeTaxItemGroup.Tax_Gross_Rebate ||
                    item.ItemGroup == EnumIncomeTaxItemGroup.Tax_Gross_Refund ||
                    item.ItemGroup == EnumIncomeTaxItemGroup.Tax_Gross_OtherRebate ||
                    item.ItemGroup == EnumIncomeTaxItemGroup.Tax_Gross_OtherAddable )
                {
                    if (item.Side == EnumIncomeTaxSide.Inc_GrossTax)
                        TotIncome = TotIncome + item.TotalAmount;
                    else if (item.Side == EnumIncomeTaxSide.Dec_GrossTax)
                        TotIncome = TotIncome - item.TotalAmount;
                }
            }
            return TotIncome;
        }

        /// <summary>
        /// follwing function equal the net tax payable and tax deducted amount. Adjusted amount stores in Tax refund item.
        /// </summary>
        protected void CalculateYearlyRefund()
        {
            IncomeTax oNetTaxPayable = this.CurrentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID && 
                   x.ItemGroup == EnumIncomeTaxItemGroup.Net_Payable && x.ItemID ==  (int)EnumIncomeTaxItemGroup.Net_Payable);
            IncomeTax oTaxDeducted = this.CurrentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID &&
                   x.ItemGroup == EnumIncomeTaxItemGroup.Tax_Deducted && x.ItemID == (int)EnumIncomeTaxItemGroup.Tax_Deducted);


            if (oNetTaxPayable == null) oNetTaxPayable = this.Add(EnumIncomeTaxItemGroup.Net_Payable,
                                                    (int)EnumIncomeTaxItemGroup.Net_Payable, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_fixed_Item);

            if (oTaxDeducted == null) oTaxDeducted = this.Add(EnumIncomeTaxItemGroup.Tax_Deducted,
                                        (int)EnumIncomeTaxItemGroup.Tax_Deducted, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_fixed_Item);

            if ((oNetTaxPayable.TotalAmount - oTaxDeducted.TotalAmount) != 0)
            {

                IncomeTax TaxRefund = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID
                        && x.ItemGroup == EnumIncomeTaxItemGroup.Tax_Refund_On_Current_Year && x.ItemID == (int)EnumIncomeTaxItemGroup.Tax_Refund_On_Current_Year);
                if (TaxRefund == null) TaxRefund = this.Add(EnumIncomeTaxItemGroup.Tax_Refund_On_Current_Year,
                                                        (int)EnumIncomeTaxItemGroup.Tax_Refund_On_Current_Year, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_fixed_Item);
                TaxRefund.ThisMonthAmount = 0;
                TaxRefund.PreviousAmount = 0;
                TaxRefund.ProjectedAmount = 0;
                TaxRefund.TotalAmount = 0;


                TaxRefund.TotalAmount = GlobalFunctions.Round(oNetTaxPayable.TotalAmount - oTaxDeducted.TotalAmount);

                // set equal to Net_Taxable_income to Tax_deducted_current_year amount
                //   oTaxDeducted.TotalAmount = oNetTaxPayable.TotalAmount;
            }
        }
        protected void CalculateNetPayable()
        {

            IncomeTax GrossTax = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID
               && x.ItemGroup == EnumIncomeTaxItemGroup.Gross_Tax && x.ItemID == (int)EnumIncomeTaxItemGroup.Gross_Tax);
            if (GrossTax == null)
            {
                this.Add(GrossTax);
            }
            this.CalculateGrossTax();


            IncomeTax netPayable = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID &&
                    x.ItemGroup == EnumIncomeTaxItemGroup.Net_Payable && x.ItemID == (int)EnumIncomeTaxItemGroup.Net_Payable);
            if (netPayable == null) netPayable = this.Add(EnumIncomeTaxItemGroup.Net_Payable,
                                                    (int)EnumIncomeTaxItemGroup.Net_Payable, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_fixed_Item);
            netPayable.TotalAmount = 0;
            netPayable.PreviousAmount = 0;
            netPayable.ThisMonthAmount = 0;
            netPayable.ProjectedAmount = 0;
            if (GrossTax.TotalAmount > 0)
            {

                IncomeTax InvestItem = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID 
                    && x.ItemGroup == EnumIncomeTaxItemGroup.Tax_Credit_On_Investment && x.ItemID == (int)EnumIncomeTaxItemGroup.Tax_Credit_On_Investment);
                if (InvestItem == null) this.CalculateInvestment();

                netPayable.ProjectedAmount = netPayable.ProjectedAmount + GrossTax.TotalAmount - InvestItem.TotalAmount;
                if (netPayable.ProjectedAmount < _taxParameter.MinTaxAmount)
                    netPayable.ProjectedAmount = _taxParameter.MinTaxAmount;

            }

            netPayable.ProjectedAmount = netPayable.ProjectedAmount + this.GetTaxRebate();

            // netPayable.ProjectedAmount = netPayable.ProjectedAmount>=5000?GlobalFunctions.Round(netPayable.ProjectedAmount):5000;
            netPayable.TotalAmount = GlobalFunctions.Round(netPayable.ProjectedAmount);
        }

        protected void CalculateGrossTax()
        {

            IncomeTax GrossTax = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID 
                    && x.ItemGroup == EnumIncomeTaxItemGroup.Gross_Tax && x.ItemID == (int)EnumIncomeTaxItemGroup.Gross_Tax);
            if (GrossTax == null) GrossTax = this.Add(EnumIncomeTaxItemGroup.Gross_Tax,
                                                    (int)EnumIncomeTaxItemGroup.Gross_Tax, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_fixed_Item);
            double annualIncome = this.GetAnnualIncome();
            double yearlyTax = this.GetTaxAmount(annualIncome);
            GrossTax.TotalAmount = 0;
            GrossTax.PreviousAmount = 0;
            GrossTax.ThisMonthAmount = 0;
            GrossTax.ProjectedAmount = GlobalFunctions.Round(yearlyTax);
            GrossTax.TotalAmount = GlobalFunctions.Round(yearlyTax);
        }

        protected double CalculateDecutedAmount()
        {
            double nAmount = 0;
            double nTaxAmount = 0;
            IncomeTax TaxDeductitem = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID
                    && x.ItemGroup == EnumIncomeTaxItemGroup.Tax_Deducted && x.ItemID == (int)EnumIncomeTaxItemGroup.Tax_Deducted);
            if (TaxDeductitem != null)
            {
                nAmount = TaxDeductitem.ThisMonthAmount;
                TaxDeductitem.ThisMonthAmount = 0;
            }

            this.CalculateThisMonth();

            TaxDeductitem = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID &&
                   x.ItemGroup == EnumIncomeTaxItemGroup.Tax_Deducted && x.ItemID == (int)EnumIncomeTaxItemGroup.Tax_Deducted);
            if (TaxDeductitem != null)
            {
                nTaxAmount = TaxDeductitem.ThisMonthAmount - nAmount;
            }
            return nTaxAmount;
        }

        protected void UndoDecutedAmount(double nAmount)
        {
            IncomeTax TaxDeductitem = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID 
                    && x.ItemGroup == EnumIncomeTaxItemGroup.Tax_Deducted && x.ItemID == (int)EnumIncomeTaxItemGroup.Tax_Deducted);
            if (TaxDeductitem != null)
                TaxDeductitem.ThisMonthAmount = TaxDeductitem.ThisMonthAmount - nAmount;
            //this.CalculateThisMonth();
        }
        protected double CalculateOnceOfInvestmentAmt(double IncomeAmount)
        {


            if (_employee.ForeignExPat == true) return 0;
            if(this._investmentwithoutpf ==null)
                this._investmentwithoutpf = new SystemConfigarationService().GetconfigBooleanValue(EnumConfigurationType.Logic, "incometax", "investmentwithoutpf");

            IncomeTax AnnItem = null;
                AnnItem = _currentYearTax.FirstOrDefault(x=>x.EmployeeID== _employee.ID && x.ItemGroup == EnumIncomeTaxItemGroup.Annual_Income
                                                           && x.ItemID == (int)EnumIncomeTaxItemGroup.Annual_Income);

            double totalIncome = IncomeAmount; //AnnItem.TotalAmount - _onceoffAmount;

            double investmentCanBeShown = ((totalIncome * _taxParameter.MaxInvestPercent) / 100);
            if (investmentCanBeShown > _taxParameter.MaxInvAmount) investmentCanBeShown = _taxParameter.MaxInvAmount;
            double investAmount = investmentCanBeShown;
            _isActualInvestment = false;


            if (payrolltype.ActualTaxInvestment == true)
            {
                _taxParameter.InvestmentActiveMonth = _taxParameter.FiscalyearDatefrom;
                _isActualInvestment = true;
            }

            if (_isActualInvestment == false && _taxParameter.InvestmentActiveMonth == null) _isActualInvestment = false;
            else
            {
                DateTime investmonth = new DateTime(_taxParameter.FiscalyearDatefrom.Year, ((DateTime)_taxParameter.InvestmentActiveMonth).Month, 1);
                investmonth = GlobalFunctions.LastDateOfMonth(investmonth);
                if (investmonth <= payrolltype.NextPayProcessDate)
                    _isActualInvestment = true;
            }
            if (_isActualInvestment == true)
            {
                IncomeTax ActualInvestment = _currentYearTax.FirstOrDefault(x=>x.EmployeeID== _employee.ID && 
                           x.ItemGroup == EnumIncomeTaxItemGroup.Investment_Actual && x.ItemID == (int)EnumIncomeTaxItemGroup.Investment_Actual);

                if (ActualInvestment == null)
                    ActualInvestment = this.Add(EnumIncomeTaxItemGroup.Investment_Actual, (int)EnumIncomeTaxItemGroup.Investment_Actual, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_Info_Item);

                IncomeTax pfItem = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID && x.ItemGroup == EnumIncomeTaxItemGroup.Company_Contri_PF
                                                             && x.ItemID ==   (int)EnumIncomeTaxItemGroup.Company_Contri_PF);
                investAmount = 0;
                if (pfItem != null)
                    investAmount = investAmount + (pfItem.TotalAmount * 2);
                //EmployeeTaxInvestment etax = new EmployeeTaxInvestment();
                //double nactualInvt = new EmployeeTaxInvestmentService().GetAmount(_taxParameter.ID, _employee.ID);
                if (this._investmentTypes == null) this._investmentTypes = new TaxInvestmentService().Get(EnumStatus.Regardless);
                if (this._empTaxInvestments == null) this._empTaxInvestments = new EmployeeTaxInvestmentService().GetByTaxParamID(this._taxParameter.ID);
                double nactualInvt = EmployeeTaxInvestment.GetAmount(this._employee.ID, _empTaxInvestments, _investmentTypes);


                investAmount = investAmount + nactualInvt;
            }


            if (investAmount > investmentCanBeShown)
                investAmount = investmentCanBeShown;
            double taxCredit = 0;
            taxCredit = (investAmount * _taxParameter.MaxInvExempPercent) / 100;

            //if (totalIncome <= 1500000)
            //    taxCredit = investAmount * .15;
            //else taxCredit = investAmount * .10;

            //if (AnnItem.TotalAmount > 1000000 && AnnItem.TotalAmount <= 3000000)
            //    taxCredit = (investAmount > 250000) ? (250000 * .15) + (investAmount - 250000) * .12 : investAmount * .15;
            //if (AnnItem.TotalAmount > 3000000)
            //{
            //    taxCredit = (investAmount > 250000) ? (250000 * .15) : investAmount * .15;
            //    investAmount = investAmount - 250000;
            //    if (investAmount > 0)
            //        taxCredit = taxCredit + ((investAmount > 500000) ? (500000 * .12) + (investAmount - 500000) * .10 : investAmount * .12);
            //}

            //IncomeTax InvestmentItem = IncomeTax.Get(_currentYearTax, _employee.ID, EnumIncomeTaxItemGroup.Tax_Credit_On_Investment,
            //                                    (int)EnumIncomeTaxItemGroup.Tax_Credit_On_Investment);
            return (taxCredit);
        }
        protected void CalculateThisMonth()
        {

            IncomeTax TaxDeductitem = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID &&
                    x.ItemGroup == EnumIncomeTaxItemGroup.Tax_Deducted && x.ItemID == (int)EnumIncomeTaxItemGroup.Tax_Deducted);
            if (TaxDeductitem == null) TaxDeductitem = this.Add(EnumIncomeTaxItemGroup.Tax_Deducted,
                                                    (int)EnumIncomeTaxItemGroup.Tax_Deducted, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_fixed_Item);

            this.CalculateGrossTax();
            this.CalculateNetPayable();
            double onceOffTax = 0;
            double netPayable = this._currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID &&
                    x.ItemGroup == EnumIncomeTaxItemGroup.Net_Payable && x.ItemID == (int)EnumIncomeTaxItemGroup.Net_Payable).TotalAmount;
            double annualIncome = this.GetAnnualIncome();
            //double grossTax = IncomeTax.Get(this._currentYearTax, _employee.ID,
            //        EnumIncomeTaxItemGroup.Gross_Tax, (int)EnumIncomeTaxItemGroup.Gross_Tax).TotalAmount;

            //if (_onceoffAmount > 0)
            //{
            //    onceOffTax = grossTax - this.GetTaxAmount(annualIncome - _onceoffAmount);
            //    onceOffTax = onceOffTax - CalculateOnceOfInvestmentAmt();
            //    if (onceOffTax < 0) onceOffTax = 0;
            //}
            double exptionAmount = 0;
            var expItem = this._currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID &&
               x.ItemGroup == EnumIncomeTaxItemGroup.AnnualExemption && x.ItemID == 
               (int)EnumIncomeTaxItemGroup.AnnualExemption);
            if (expItem != null) exptionAmount = expItem.TotalAmount;
            
            if (_employee.Status == EnumEmployeeStatus.Discontinued)
                TaxDeductitem.ThisMonthAmount = netPayable - TaxDeductitem.TotalAmount;
            else
            {

                if (_projectedMonth < 0)
                    throw new ServiceException("Projected month can't be less then Zero.");

                if (_onceoffAmount > 0 && netPayable >= _taxParameter.MinTaxAmount)
                {
                    double onceofIncome = annualIncome - _onceoffAmount + exptionAmount;
                    double Onceexemption = (onceofIncome / 3) * 1;
                    if (Onceexemption > 450000)
                    {
                        onceofIncome = onceofIncome - 450000;
                    }
                    else onceofIncome = onceofIncome - Onceexemption;

                    onceOffTax = this.GetTaxAmount(onceofIncome);
                    double invAmount = CalculateOnceOfInvestmentAmt(onceofIncome);
                    onceOffTax = onceOffTax - invAmount;
                    onceOffTax = onceOffTax + this.GetTaxRebate();
                    if (_taxParameter.MinTaxAmount > onceOffTax)
                        onceOffTax = _taxParameter.MinTaxAmount;

                    double ntp = netPayable - onceOffTax;
                    if (ntp < 0) ntp = 0;
                    onceOffTax = onceOffTax - TaxDeductitem.TotalAmount; // Tax to be paid rest of the year;
                    TaxDeductitem.ThisMonthAmount = ntp + (onceOffTax / (_projectedMonth + 1));
                }
                else TaxDeductitem.ThisMonthAmount = ((netPayable - TaxDeductitem.TotalAmount) / (_projectedMonth + 1));

                if (TaxDeductitem.TotalAmount > netPayable)
                    TaxDeductitem.ThisMonthAmount = netPayable - TaxDeductitem.PreviousAmount;
            }

            if (TaxDeductitem.ThisMonthAmount < 0)
            {
                TaxDeductitem.ThisMonthAmount = GlobalFunctions.Round(0);
            }
            else
            {
                TaxDeductitem.ThisMonthAmount = GlobalFunctions.Round(TaxDeductitem.ThisMonthAmount);
            }
            TaxDeductitem.ProjectedAmount = GlobalFunctions.Round(TaxDeductitem.ProjectedAmount);

            if (this.payrolltype.NextPayProcessDate.Month != 6 && _employee.JoiningDate > GlobalFunctions.FirstDateOfMonth(this.payrolltype.NextPayProcessDate) && _employee.JoiningDate <= this.payrolltype.NextPayProcessDate)
            {
                double fraction = GlobalFunctions.GetFraction(_employee.JoiningDate, this.payrolltype.NextPayProcessDate);
                double thismonthtemp = TaxDeductitem.ThisMonthAmount;
                TaxDeductitem.ThisMonthAmount = GlobalFunctions.Round(TaxDeductitem.ThisMonthAmount * fraction);
                TaxDeductitem.ProjectedAmount = TaxDeductitem.ProjectedAmount + (thismonthtemp - GlobalFunctions.Round(TaxDeductitem.ThisMonthAmount * fraction));
            }
        }

        protected double GetTaxAmount(double TaxableIncome)
        {
 
            double taxAmount = 0;
            if (_employee.ForeignExPat == true)
            {
                if ((_employee.JoiningDate - payrolltype.NextPayProcessDate).TotalDays  <= 183) return TaxableIncome * .3;
            }
            List<TaxParameterSlab> parameterSlabs = new TaxParameterService().CalculateTaxOnSlab(payrolltype, _taxParameter, _employee, TaxableIncome);
            taxAmount = TaxParameterSlab.GetTotalTaxAmount(parameterSlabs);
            return taxAmount;
 
        }

        //protected void UpdateRawItems(List<TaxRawItem> rawItems, EnumSide nSide)
        //{
        //foreach (TaxRawItem item in rawItems)
        //{
        //    if (item.Amount == 0) continue;
        //    IncomeTax taxItem = null;
        //    switch (item.ItemType)
        //    {
        //        case enumIncomeTaxItemType.Basic_Salary:
        //            taxItem = GetTaxItem(EnumTaxMergeType.NONE, (int)EnumIncomeTaxItemGroup.Basic_Salary, item.Description);
        //            break;
        //        case enumIncomeTaxItemType.Allowance:
        //            taxItem = GetTaxItem(EnumTaxMergeType.Allowance, item.ItemId, item.Description);
        //            break;
        //        case enumIncomeTaxItemType.Deduction:
        //            taxItem = GetTaxItem(EnumTaxMergeType.Allowance, item.ItemId, item.Description);
        //            break;
        //        case enumIncomeTaxItemType.OT:
        //            taxItem = GetTaxItem(EnumTaxMergeType.OT, item.ItemId, item.Description);
        //            break;
        //        case enumIncomeTaxItemType.Bonus:
        //            taxItem = GetTaxItem(EnumTaxMergeType.Bonus, item.ItemId, item.Description);
        //            break;
        //        case enumIncomeTaxItemType.FinalSettlement:
        //            taxItem = GetTaxItem(EnumTaxMergeType.Settlement, item.ItemId, item.Description);
        //            break;
        //            break;
        //        case enumIncomeTaxItemType.OPI:
        //            //taxItem = GetTaxItem(EnumTaxMergeType.Bonus, item.ItemId, item.Description);
        //            //taxItem.ThisMonthAmount = GlobalFunctions.Round(item.Amount);
        //            break;
        //        case enumIncomeTaxItemType.AdjustItem:
        //            taxItem = GetTaxItem(EnumTaxMergeType.TaxAdjustItem, item.ItemId, item.Description);
        //            break;
        //        case enumIncomeTaxItemType.Earned_Leave:
        //            taxItem = GetTaxItem(EnumTaxMergeType.NONE, (int)EnumIncomeTaxItemGroup.Earned_Leave, item.Description);
        //            break;

        //        default:
        //            break;
        //    }

        //    if (taxItem != null)
        //    {
        //        taxItem.ThisMonthAmount = (nSide == EnumSide.Deduct) ? -GlobalFunctions.Round(item.Amount) : GlobalFunctions.Round(item.Amount);
        //        if (taxItem != null) taxItem.Side = EnumIncomeTaxSide.Inc_SalaryIncome;
        //        this.Add(taxItem);
        //    }
        //}
        protected void UpdateRawItems(List<TaxRawItem> rawItems, EnumSide nSide)
        {
            foreach (TaxRawItem item in rawItems)
            {
                if (item.Amount == 0) continue;
                IncomeTax taxItem = null;
                switch (item.ItemType)
                {
                    case enumIncomeTaxItemType.Basic_Salary:
                        taxItem = GetTaxItem(EnumTaxMergeType.NONE, (int)EnumIncomeTaxItemGroup.Basic_Salary, item.Description);
                        taxItem.ThisMonthAmount = taxItem.ThisMonthAmount + item.Amount;
                        if (item.ChangePrgAmount == true) taxItem.ProjectedAmount = (_employee.BasicSalary * _projectedMonth);

                        break;
                    case enumIncomeTaxItemType.Allowance:
                        if (item.ChangePrgAmount == true)
                        {
                            SalaryMonthlyDetail odtl = new SalaryMonthlyDetail();
                            odtl.CalculatedAmount = item.Amount;
                            odtl.ChangedAmount = item.Amount;
                            odtl.Description = item.Description;
                            odtl.itemGroupCode = EnumSalaryGroup.Gross;
                            odtl.ItemCode = EnumSalaryItemCode.Allowance;
                            odtl.ItemID = item.ItemId;
                            odtl.SupportID = item.SupportID;

                            //taxItem = GetTaxItem(EnumTaxMergeType.Allowance, item.ItemId, item.Description);
                            //double namount = taxItem.ThisMonthAmount;
                            taxItem = this.PayslipAllowanceDeduction(odtl, EnumTaxMergeType.Allowance);
                            //taxItem.ThisMonthAmount = taxItem.ThisMonthAmount + namount;
                        }
                        else
                        {
                            taxItem = GetTaxItem(EnumTaxMergeType.Allowance, item.ItemId, item.Description);
                            taxItem.ThisMonthAmount = taxItem.ThisMonthAmount + item.Amount;
                        }
                        break;
                    case enumIncomeTaxItemType.Deduction:
                        if (item.ChangePrgAmount == true)
                        {
                            SalaryMonthlyDetail odtl = new SalaryMonthlyDetail();
                            odtl.CalculatedAmount = item.Amount;
                            odtl.ChangedAmount = item.Amount;
                            odtl.Description = item.Description;
                            odtl.itemGroupCode = EnumSalaryGroup.Deductions;
                            odtl.ItemCode = EnumSalaryItemCode.Deduction;
                            odtl.ItemID = item.ItemId;
                            odtl.SupportID = item.SupportID;

                            //taxItem = GetTaxItem(EnumTaxMergeType.Allowance, item.ItemId, item.Description);
                            //double namount = taxItem.ThisMonthAmount;
                            taxItem = this.PayslipAllowanceDeduction(odtl, EnumTaxMergeType.Deduction);
                            //taxItem.ThisMonthAmount = taxItem.ThisMonthAmount + namount;
                        }
                        else
                        {
                            taxItem = GetTaxItem(EnumTaxMergeType.Allowance, item.ItemId, item.Description);
                            taxItem.ThisMonthAmount = taxItem.ThisMonthAmount + item.Amount;
                        }
                        //taxItem = GetTaxItem(EnumTaxMergeType.Allowance, item.ItemId, item.Description);
                        break;
                    case enumIncomeTaxItemType.OT:
                        taxItem = GetTaxItem(EnumTaxMergeType.OT, item.ItemId, item.Description);
                        taxItem.ThisMonthAmount = taxItem.ThisMonthAmount + item.Amount;
                        break;
                    case enumIncomeTaxItemType.Bonus:
                        taxItem = GetTaxItem(EnumTaxMergeType.Bonus, item.ItemId, item.Description);
                        if (taxItem == null)
                            taxItem = GetTaxItem(EnumTaxMergeType.NONE, (int)EnumIncomeTaxItemGroup.Bonus, item.Description);

                        taxItem.ThisMonthAmount = taxItem.ThisMonthAmount + item.Amount;
                        break;
                    case enumIncomeTaxItemType.FinalSettlement:
                        taxItem = GetTaxItem(EnumTaxMergeType.Settlement, item.ItemId, item.Description);
                        taxItem.ThisMonthAmount = taxItem.ThisMonthAmount + item.Amount;
                        break;
                    case enumIncomeTaxItemType.OPI:
                        //taxItem = GetTaxItem(EnumTaxMergeType.Bonus, item.ItemId, item.Description);
                        //taxItem.ThisMonthAmount = GlobalFunctions.Round(item.Amount);
                        break;
                    case enumIncomeTaxItemType.AdjustItem:
                        taxItem = GetTaxItem(EnumTaxMergeType.TaxAdjustItem, item.ItemId, item.Description);
                        taxItem.ThisMonthAmount = taxItem.ThisMonthAmount + item.Amount;
                        break;
                    case enumIncomeTaxItemType.Earned_Leave:
                        taxItem = GetTaxItem(EnumTaxMergeType.NONE, (int)EnumIncomeTaxItemGroup.Earned_Leave, item.Description);
                        taxItem.ThisMonthAmount = taxItem.ThisMonthAmount + item.Amount;
                        break;
                    case enumIncomeTaxItemType.LFA:
                        taxItem = GetTaxItem(EnumTaxMergeType.NONE, (int)EnumIncomeTaxItemGroup.LFA_Allowance, item.Description);
                        taxItem.ThisMonthAmount = taxItem.ThisMonthAmount + item.Amount;
                        break;
                    default:
                        break;
                }

                if (taxItem != null)
                {
                    // taxItem.ThisMonthAmount = (nSide == EnumSide.Deduct) ? -GlobalFunctions.Round(item.Amount) : GlobalFunctions.Round(item.Amount);
                    if (taxItem != null) taxItem.Side = EnumIncomeTaxSide.Inc_SalaryIncome;
                    this.Add(taxItem);
                }
            }


        }


        private double GetTaxConciderInvestment(double income)
        {
            double taxamount = this.GetTaxAmount(income);

            if (_employee.ForeignExPat == true) return 0;
            if(this._investmentwithoutpf ==null)
                this._investmentwithoutpf = new SystemConfigarationService().GetconfigBooleanValue( EnumConfigurationType.Logic, "incometax", "investmentwithoutpf");

            double investmentCanBeShown = ((taxamount * _taxParameter.MaxInvestPercent) / 100);
            if (investmentCanBeShown > _taxParameter.MaxInvAmount) investmentCanBeShown = _taxParameter.MaxInvAmount;
            double investAmount = investmentCanBeShown;
            _isActualInvestment = false;
            if (_taxParameter.InvestmentActiveMonth == null) _isActualInvestment = false;
            else
            {
                DateTime investmonth = new DateTime(_taxParameter.FiscalyearDatefrom.Year, ((DateTime)_taxParameter.InvestmentActiveMonth).Month, 1);
                investmonth = GlobalFunctions.LastDateOfMonth(investmonth);
                if (investmonth <= payrolltype.NextPayProcessDate)
                    _isActualInvestment = true;
            }
            if (_isActualInvestment == true)
            {
                IncomeTax ActualInvestment = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID && 
                       x.ItemGroup == EnumIncomeTaxItemGroup.Investment_Actual && x.ItemID == (int)EnumIncomeTaxItemGroup.Investment_Actual);
                investAmount = ActualInvestment.ThisMonthAmount;
            }


            if (investAmount > investmentCanBeShown)
                investAmount = investmentCanBeShown;
            double taxCredit = 0;
            taxCredit = (investAmount * _taxParameter.MaxInvExempPercent) / 100;
            taxamount = taxamount - taxCredit;
            return taxamount;
        }

        private double GetTaxonTaxAmount(double onAmount)
        {

            //IncomeTax carIncome = IncomeTax.Get(_currentYearTax, _employee.ID,
            //           EnumIncomeTaxItemGroup.Cmp_Provided_car,
            //               (int)EnumIncomeTaxItemGroup.Cmp_Provided_car);
            this.CalculateTotalIncome();

            IncomeTax IncomeWithCar = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID 
              && x.ItemGroup == EnumIncomeTaxItemGroup.Annual_Salary_Income && x.ItemID == (int)EnumIncomeTaxItemGroup.Annual_Salary_Income);

            double dif = 0;
            double onlyCarTax = this.GetTaxConciderInvestment(IncomeWithCar.TotalAmount - onAmount); ;
            double taxwithCar = this.GetTaxConciderInvestment(IncomeWithCar.TotalAmount);

            dif = taxwithCar - onlyCarTax;
            double addedIncome = dif + taxwithCar;
            double prvTax = taxwithCar;

            while (dif < 0)
            {
                dif = this.GetTaxConciderInvestment(addedIncome);
                dif = dif - prvTax;
                prvTax = addedIncome;
                if (dif > 0) addedIncome = addedIncome + dif;
            }

            dif = addedIncome - taxwithCar;

            return dif;
        }

        /// <summary>
        /// Find the gross tax 
        /// include gross tax in total salary income 
        /// calculate salary income, annual income 
        /// </summary>


        protected double CulculateArrearOnMonth()
        {
            double nAmount = 0;
            double nTaxAmount = 0;
            IncomeTax TaxDeductitem = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID &&
                    x.ItemGroup == EnumIncomeTaxItemGroup.Tax_Deducted && x.ItemID == (int)EnumIncomeTaxItemGroup.Tax_Deducted);

            if (TaxDeductitem == null) TaxDeductitem = this.Add(EnumIncomeTaxItemGroup.Tax_Deducted,
                                        (int)EnumIncomeTaxItemGroup.Tax_Deducted, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_fixed_Item);

            IncomeTax onetTax = _currentYearTax.FirstOrDefault(x=>x.EmployeeID == _employee.ID
                        && x.ItemGroup == EnumIncomeTaxItemGroup.Net_Payable && x.ItemID == (int)EnumIncomeTaxItemGroup.Net_Payable);

            if (onetTax != null)
            {
                nAmount = onetTax.TotalAmount;
                nAmount = nAmount / (double)12;
                int arrMonth = 12 - (int)_projectedMonth;
                nAmount = nAmount * arrMonth;
                if (TaxDeductitem != null)
                {
                    nAmount = nAmount - TaxDeductitem.TotalAmount;
                    if (nAmount < 0) nAmount = 0;
                    TaxDeductitem.ThisMonthAmount = nAmount;
                    nTaxAmount = nAmount;
                }
            }

            //this.CalculateThisMonth();

            //TaxDeductitem = IncomeTax.Get(_currentYearTax, _employee.ID,
            //        EnumIncomeTaxItemGroup.Tax_Deducted, (int)EnumIncomeTaxItemGroup.Tax_Deducted);
            //if (TaxDeductitem != null)
            //{
            //    nTaxAmount = TaxDeductitem.ThisMonthAmount - nAmount;
            //}
            return nTaxAmount;
        }
    }
    public interface ISalaryTax
    {
        SalaryMonthly Salary { set; get; }
        List<IncomeTax> Calculate();
    }
    public interface IBonusTax
    {
        BonusProcess.BonusProcessDetail Bonus { set; get; }
        List<IncomeTax> Calculate();
    }
    public interface ITaxCalculator
    {

    }
    public class TaxCalculator : AbstractTaxCalculator
    {
        public TaxCalculator(int taxparamid, int payrolltypeid):base(taxparamid, payrolltypeid)
        {
            
        }
        public TaxCalculator() : base()
        {

        }
        public override List<ADParameter> AdParameters
        {
            set { _adParameters = value; }
        }
        public override SalaryMonthly Salary
        {
            set { _salary = value; }
        }
        public override Employee Employee
        {
            set
            {
                if (_taxParameter == null) throw new ServiceException("Taxparameter must set before Employee");
                _taxSlabs = new TaxParameterService().GetEmployeeSlab( payrolltype,
                                    _taxParameter, value);
                TaxParameter.SetMinimumTax(value, _taxParameter);

                _employee = value;

            }
        }


        public override TaxParameter TaxParameter
        {
            set
            {
                _taxParameter = value;
            }
        }

        public List<IncomeTax> SalaryTax()
        {
            string smessage = "";
            try
            {
                _isActualInvestment = true;
                this._onceoffAmount = 0;

                smessage = "InitiazedNextMonth";
                this.InitializeForNextMonth();
                smessage = "CalcualteprojectMonth";
                this.CalcualteprojectMonth();
                smessage = "IncludePayslipItems";
                this.IncludePayslipItems();
                //smessage = "Calculate OT";
                //this.CalculateOT();
                smessage = "CmpProvidedHouseAndTransport";
                this.CmpProvidedHouseAndTransport(payrolltype.NextPayProcessDate);
                smessage = "Calculate-Bonus-Projection";
                this.CalculateBonusProjection();
                smessage = "CalculateCPF";
                this.CalculateCPF();
                //this.CalculateTaxOnTax();
                //smessage = "Calculate tax on tax";
                smessage = "Calculate-Exemption";
                this.CalculateExemptionOnward2023();
                smessage = "Calculate-Total-Income";
                this.CalculateTotalIncome();
                smessage = "CalculateInvestment";
                this.CalculateInvestment();
                smessage = "CalculateGrossTax";
                this.CalculateGrossTax();
                smessage = "CalculateNetPayable";
                this.CalculateNetPayable();
                smessage = "CalculateThisMonth";
                this.CalculateThisMonth();
                smessage = "Trade of tool calculation";
                //   this.ToolOfTradeCalculation();
                smessage = "End";
                return this.CurrentYearTax;
            }
            catch (ServiceException ex)
            {
                throw new ServiceException(ex.Message + "###" + smessage);
            }
            catch (Exception ex)
            {
                throw new ServiceException(ex.Message + "###" + smessage);
            }
        }

        public List<IncomeTax> RecalculateTax(int nTaxParamterID)
        {
            List<IncomeTax> empTaxCertificates = new List<IncomeTax>();

            try
            {
                // if IncomeTax.get() function not return employee order-by wise data, rest of the function will not culculate properly.                
                List<IncomeTax> oTaxYearly = new  IncomeTaxService().GetPrvYear(nTaxParamterID, this.payrolltype.ID);
                if (this.payrolltype.TaxParamID == nTaxParamterID)
                    oTaxYearly = new IncomeTaxService().GetByYear(nTaxParamterID, EnumIncomeTaxDataFrom.ProcessTempData, this.payrolltype.ID);
                else
                    oTaxYearly = new IncomeTaxService().GetPrvYear(nTaxParamterID,payrolltype.ID);
                int? nCurrEmployeeid = null;
                if (oTaxYearly.Count > 0) nCurrEmployeeid = oTaxYearly[0].EmployeeID;
                _taxParameter = new TaxParameterService().Get((int)nTaxParamterID);
                this.payrolltype.ActualTaxInvestment = true;
                List<Employee> oemps = new EmployeeService().GetAllEmps();
                while (true)
                {
                    _employee = oemps.FirstOrDefault(x => x.ID == nCurrEmployeeid);
                    if(_employee == null)  _employee = new EmployeeService().Get((int)nCurrEmployeeid);

                    _isActualInvestment = true;
                    this.CurrentYearTax = oTaxYearly.FindAll(x=>x.EmployeeID == nCurrEmployeeid);
                    // Initialize the current data.
                    foreach (IncomeTax item in this.CurrentYearTax)
                        oTaxYearly.Remove(item); // Remove from collection


                    this.CalculateTotalIncome();
                    this.CalculateInvestment();
                    this.CalculateGrossTax();
                    this.CalculateNetPayable();

                    foreach (IncomeTax item in this.CurrentYearTax)
                    {
                        item.EmployeeID = _employee.ID;
                        item.TaxParameterID = nTaxParamterID;
                        empTaxCertificates.Add(item);
                    }

                    if (oTaxYearly.Count > 0) nCurrEmployeeid = oTaxYearly[0].EmployeeID;
                    else break;
                }
            }
            catch (Exception ex)
            {
                throw new ServiceException(ex.Message);
            }

            return empTaxCertificates;
        }

        //public List<IncomeTax> CalculateBonus(List<TaxRawItem> rawItems, ref double ntaxAmount)
        //{
        //    try
        //    {
        //        double nTempAmount = 0;
        //        bool bStartMonth = false;
        //        _isActualInvestment = true;
        //        this._onceoffAmount = rawItems.Sum(x => x.Amount);

        //        IncomeTax oIncomeTax = new IncomeTax();
        //        EnumIncomeTaxDataFrom datafrom = new IncomeTaxService().GetEnumForSalaryIT(_employee.ID);
        //        if (datafrom == EnumIncomeTaxDataFrom.SalaryITTempData)
        //        {
        //            throw new ServiceException("Current month salary is processed and not yet finalized. Tax calculation "
        //                + " is not allowed middle of this process. You have to Undo or finalize the salary to calculate tax.");
        //        }
        //        this.CurrentYearTax = new List<IncomeTax>();
        //        this.CurrentYearTax = new IncomeTaxService().Get(_employee.ID, EnumIncomeTaxDataFrom.ProcessTempData);
        //        if (this.payrolltype.NextPayProcessDate.Month == 7) // if month is july and salary not yet processed then, clear all tax data
        //        {
        //            bStartMonth = true;
        //            this.CalcualteprojectMonth();
        //            this.CalculateOnlyProjection();
        //        }
        //        this.UpdateRawItems(rawItems, EnumSide.Add);
        //        this.CalculateExamtion();
        //        this.CalculateBonusProjection();
        //        this.CalculateCPF();
        //        this.CalculateTotalIncome();
        //        this.CalculateInvestment();
        //        this.CalculateGrossTax();


        //        double totalAmount = 0;
        //        IncomeTax netPayable = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
        //                  && x.ItemGroup == EnumIncomeTaxItemGroup.Net_Payable && x.ItemID == (int)EnumIncomeTaxItemGroup.Net_Payable);
        //        if (netPayable != null)
        //            nTempAmount = netPayable.TotalAmount;
        //        ntaxAmount = 0;
        //        this.CalculateNetPayable();

        //        if (_ApplicableBonusParams != null)
        //        {
        //            BonusParameter oparam = _ApplicableBonusParams.FirstOrDefault(x => x.BonusID == rawItems[0].ItemId);
        //            if (oparam != null && oparam.IsFestival == true) // isFestival mean bonus is projected for tax. So no need to deduct tax in bonus process
        //                return this.CurrentYearTax;
        //        }

        //        ntaxAmount = nTempAmount;
        //        netPayable = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
        //                  && x.ItemGroup == EnumIncomeTaxItemGroup.Net_Payable && x.ItemID == (int)EnumIncomeTaxItemGroup.Net_Payable);
        //        if (netPayable != null)
        //            if (totalAmount > 0)
        //                ntaxAmount = netPayable.TotalAmount - totalAmount;
        //            else
        //                ntaxAmount = (-totalAmount - netPayable.TotalAmount) > 0 ? 0 : netPayable.TotalAmount;

        //        double grossTax = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
        //                     && x.ItemGroup == EnumIncomeTaxItemGroup.Gross_Tax && x.ItemID == (int)EnumIncomeTaxItemGroup.Gross_Tax).TotalAmount;

        //        if (_onceoffAmount > 0)
        //        {

        //            double annualIncome = this.GetAnnualIncome();
        //            ntaxAmount = grossTax - this.GetTaxAmount(annualIncome - _onceoffAmount);
        //            ntaxAmount = ntaxAmount - CalculateOnceOfInvestmentAmt();
        //            if (ntaxAmount < 0) ntaxAmount = 0;
        //        }

        //        IncomeTax TaxDeductitem = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID &&
        //                    x.ItemGroup == EnumIncomeTaxItemGroup.Tax_Deducted && x.ItemID == (int)EnumIncomeTaxItemGroup.Tax_Deducted);
        //        if (TaxDeductitem == null) TaxDeductitem = this.Add(EnumIncomeTaxItemGroup.Tax_Deducted,
        //                            (int)EnumIncomeTaxItemGroup.Tax_Deducted, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_fixed_Item);

        //        TaxDeductitem.ThisMonthAmount = TaxDeductitem.ThisMonthAmount + ntaxAmount;


        //        return this.CurrentYearTax;
        //    }
        //    catch (ServiceException ex)
        //    {
        //        throw new ServiceException(ex.Message);
        //    }
        //    catch (Exception ex)
        //    {
        //        throw new ServiceException(ex.Message);
        //    }
        //}
        public List<IncomeTax> CalculateBonus(List<TaxRawItem> rawItems, BonusParameter bonusParam, ref double ntaxAmount, List<ADParameter> oParams, List<IncomeTax> oTaxes)
        {
            try
            {
                double nTempAmount = 0;
                bool bStartMonth = false;
                _isActualInvestment = false;
                this._onceoffAmount = rawItems.Sum(x => x.Amount);

                IncomeTax oIncomeTax = new IncomeTax();

                this.CurrentYearTax = new List<IncomeTax>();
                foreach (IncomeTax item in oTaxes)
                {
                    if (item.EmployeeID == _employee.ID)
                        this.CurrentYearTax.Add(item);
                }
                if (this.payrolltype.NextPayProcessDate.Month == 7 && this.CurrentYearTax.Count ==0) // if month is july and salary not yet processed then, clear all tax data
                {
                    bStartMonth = true;
                    _projectedMonth = 12;
                    if (_projectedMonth < 0) _projectedMonth = 0;
                    if (_employee.EndOfContractDate != null && _employee.EndOfContractDate != DateTime.MinValue)
                    {
                        if (_employee.EndOfContractDate < _taxParameter.FiscalyearDateTo)
                            _projectedMonth = 0;
                    }
                    this.CalculateOnlyProjection(oParams);
                }

                this.UpdateRawItems(rawItems, EnumSide.Add);
                this.CalculateBonusProjection();
                this.CalculateExemptionOnward2023();
                this.CalculateTotalIncome();
                this.CalculateInvestment();
                this.CalculateGrossTax();

                if (bonusParam.IsProjectInTaxCalculation == true)
                {
                    this.CalculateNetPayable();
                    return this.CurrentYearTax;
                }


                IncomeTax ntpBeforeBonus = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
                         && x.ItemGroup == EnumIncomeTaxItemGroup.Net_Payable && x.ItemID == (int)EnumIncomeTaxItemGroup.Net_Payable);

                this.CalculateNetPayable();

                //if (_ApplicableBonusParams != null)
                //{
                //    BonusParameter oparam = _ApplicableBonusParams.FirstOrDefault(x => x.BonusID == rawItems[0].ItemId);
                //    if (oparam != null && oparam.IsFestival == true) // isFestival mean bonus is projected for tax. So no need to deduct tax in bonus process
                //        return this.CurrentYearTax;
                //}



                //netPayable = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID &&
                //   x.ItemGroup == EnumIncomeTaxItemGroup.Net_Payable && x.ItemID == (int)EnumIncomeTaxItemGroup.Net_Payable);
                //if (netPayable != null)
                //    if (totalAmount > 0)
                //        ntaxAmount = netPayable.TotalAmount - totalAmount;
                //    else
                //        ntaxAmount = (-totalAmount - netPayable.TotalAmount) > 0 ? 0 : netPayable.TotalAmount;

                IncomeTax netPayable = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID &&
                   x.ItemGroup == EnumIncomeTaxItemGroup.Net_Payable && x.ItemID == (int)EnumIncomeTaxItemGroup.Net_Payable);
                if (netPayable != null)
                {
       

                    double annualIncome = this.GetAnnualIncome();
                    double newGross =  this.GetTaxAmount(annualIncome - _onceoffAmount);
                    ntaxAmount = newGross - CalculateOnceOfInvestmentAmt(annualIncome - _onceoffAmount);

                    if (newGross >0 && ntaxAmount < _taxParameter.MinTaxAmount)
                        ntaxAmount = _taxParameter.MinTaxAmount;

                    ntaxAmount = ntaxAmount + this.GetTaxRebate();
                    if (ntaxAmount < 0) ntaxAmount = 0;
                    if (ntpBeforeBonus != null && ntpBeforeBonus.TotalAmount < _taxParameter.MinTaxAmount &&
                        ntaxAmount >= _taxParameter.MinTaxAmount) // before bonus tax amount was zero, 
                                                                  //  now eligible for tax
                    {
                        ntaxAmount = netPayable.TotalAmount;
                    }
                    else if (ntpBeforeBonus != null && ntpBeforeBonus.TotalAmount == _taxParameter.MinTaxAmount 
                            && ntaxAmount == _taxParameter.MinTaxAmount) // tax amount was min_tax
                    {
                        ntaxAmount = 0;
                        //IncomeTax ditem = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID &&
                        //           x.ItemGroup == EnumIncomeTaxItemGroup.Tax_Deducted && x.ItemID == (int)EnumIncomeTaxItemGroup.Tax_Deducted);
                        //if (ditem != null)
                        //{
                        //    ntaxAmount = ntpBeforeBonus.TotalAmount - ditem.TotalAmount;
                        //}
                        //else ntaxAmount = _taxParameter.MinTaxAmount;
                    }
                    else
                    {
                        ntaxAmount = netPayable.TotalAmount - ntaxAmount;
                    }
                    if (ntaxAmount < 0) ntaxAmount = 0;
                    ntaxAmount = GlobalFunctions.Round(ntaxAmount);
                }

                if(ntaxAmount> this._onceoffAmount) // if tax amount greater than bonus amount
                {
                    ntaxAmount = this._onceoffAmount;
                }

                IncomeTax TaxDeductitem = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID &&
                           x.ItemGroup == EnumIncomeTaxItemGroup.Tax_Deducted && x.ItemID == (int)EnumIncomeTaxItemGroup.Tax_Deducted);
                if (TaxDeductitem == null) TaxDeductitem = this.Add(EnumIncomeTaxItemGroup.Tax_Deducted,
                                    (int)EnumIncomeTaxItemGroup.Tax_Deducted, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_fixed_Item);

                TaxDeductitem.PreviousAmount = TaxDeductitem.PreviousAmount + TaxDeductitem.ThisMonthAmount ;
                TaxDeductitem.ThisMonthAmount = ntaxAmount;


                return this.CurrentYearTax;
            }
            catch (ServiceException ex)
            {
                throw new ServiceException(ex.Message);
            }
            catch (Exception ex)
            {
                throw new ServiceException(ex.Message);
            }
        }


        public List<IncomeTax> UndoBonus(List<TaxRawItem> rawItems, double taxAmount)
        {
            try
            {
                _isActualInvestment = true;
                this._onceoffAmount = 0;

                IncomeTax oIncomeTax = new IncomeTax();
                //EnumIncomeTaxDataFrom datafrom = oIncomeTax.GetEnumForSalaryIT(_employee.ID);
                //if (datafrom == EnumIncomeTaxDataFrom.SalaryITTempData)
                //{
                //    throw new ServiceException("Current month salary is processed and not yet finalized. Tax calculation "
                //        + " is not allowed middle of this process. You have to Undo or finalize the salary to calculate tax.");
                //}




                this.UpdateRawItems(rawItems, EnumSide.Deduct);
                this.CalculateBonusProjection();
                this.CalculateTotalIncome();
                this.CalculateInvestment();
                this.CalculateGrossTax();
                this.CalculateNetPayable();
                this.UndoDecutedAmount(taxAmount);
                return this.CurrentYearTax;
            }
            catch (ServiceException ex)
            {
                throw new ServiceException(ex.Message);
            }
            catch (Exception ex)
            {
                throw new ServiceException(ex.Message);
            }
        }


        /// <summary>
        /// 
        /// </summary>
        /// <param name="rawItems"></param>
        /// <returns></returns>



        public double Calculate(List<TaxRawItem> rawItems)
        {
            try
            {

                _isActualInvestment = true;
                this._onceoffAmount = 0;

                IncomeTax oIncomeTax = new IncomeTax();
                EnumIncomeTaxDataFrom datafrom = new IncomeTaxService().GetEnumForSalaryIT(_employee.ID);
                this.CurrentYearTax = new List<IncomeTax>();
                this.CurrentYearTax = new IncomeTaxService().Get(_employee.ID, datafrom);
                this.CalcualteprojectMonth();
                this.UpdateRawItems(rawItems, EnumSide.Add);
                this.CmpProvidedHouseAndTransport(this.payrolltype.NextPayProcessDate);
                this.CalculateExamtion();
                this.CalculateBonusProjection();
                this.CalculateCPF();
                this.CalculateTotalIncome();
                this.CalculateInvestment();
                this.CalculateGrossTax();
                double totalAmount = 0;
                IncomeTax netPayable = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID &&
                        x.ItemGroup == EnumIncomeTaxItemGroup.Net_Payable && x.ItemID == (int)EnumIncomeTaxItemGroup.Net_Payable);
                if (netPayable != null)
                    totalAmount = netPayable.TotalAmount;
                this.CalculateNetPayable();

                netPayable = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID &&
                 x.ItemGroup == EnumIncomeTaxItemGroup.Net_Payable && x.ItemID == (int)EnumIncomeTaxItemGroup.Net_Payable);


                if (netPayable != null)
                    totalAmount = netPayable.TotalAmount - totalAmount;

                // if the amount is equal to yearly netpayable, the amount should be dsitributed next of the projected month
                if (totalAmount == netPayable.TotalAmount && netPayable.TotalAmount == _taxParameter.MinTaxAmount && _projectedMonth > 0)
                    totalAmount = totalAmount / _projectedMonth;
                return totalAmount;
            }
            catch (ServiceException ex)
            {
                throw new ServiceException(ex.Message);
            }
            catch (Exception ex)
            {
                throw new ServiceException(ex.Message);
            }
        }
        //End OPI Calculation
        /// <summary>
        /// 
        /// </summary>
        /// <param name="rawItem"></param>
        /// <param name="taxAmount"></param>
        /// <returns></returns>
        public List<IncomeTax> Calculate(List<TaxRawItem> rawItems, ref double ntaxAmount)
        {
            try
            {
                _isActualInvestment = true;
                this._onceoffAmount = rawItems[0].Amount;

                IncomeTax oIncomeTax = new IncomeTax();
                EnumIncomeTaxDataFrom datafrom = new IncomeTaxService().GetEnumForSalaryIT(_employee.ID);
                if (datafrom == EnumIncomeTaxDataFrom.SalaryITTempData)
                {
                    throw new ServiceException("Current month salary is processed and not yet finalized. Tax calculation "
                        + " is not allowed middle of this process. You have to Undo or finalize the salary to calculate tax.");
                }
                this.CurrentYearTax = new List<IncomeTax>();
                this.CurrentYearTax = new IncomeTaxService().Get(_employee.ID, EnumIncomeTaxDataFrom.ProcessTempData);

                this.CalcualteprojectMonth();
                this.UpdateRawItems(rawItems, EnumSide.Add);
                this.CmpProvidedHouseAndTransport(this.payrolltype.NextPayProcessDate);
                this.CalculateExamtion();
                this.CalculateBonusProjection();
                this.CalculateCPF();
                this.CalculateTotalIncome();
                this.CalculateInvestment();
                this.CalculateGrossTax();
                this.CalculateNetPayable();
                ntaxAmount = this.CalculateDecutedAmount();
                return this.CurrentYearTax;
            }
            catch (ServiceException ex)
            {
                throw new ServiceException(ex.Message);
            }
            catch (Exception ex)
            {
                throw new ServiceException(ex.Message);
            }
        }


        /// <summary>
        /// 
        /// </summary>
        /// <param name="rawItem"></param>
        /// <param name="taxAmount"></param>
        /// <returns></returns>
        public List<IncomeTax> CalculateSettlementTax(List<TaxRawItem> rawItems)
        {
            try
            {
                _isActualInvestment = true;
                this._onceoffAmount = 0;

                IncomeTax oIncomeTax = new IncomeTax();
                EnumIncomeTaxDataFrom datafrom = new IncomeTaxService().GetEnumForSalaryIT(_employee.ID);
                if (datafrom == EnumIncomeTaxDataFrom.SalaryITTempData)
                {
                    throw new ServiceException("Current month salary is processed and not yet finalized. Tax calculation "
                        + " is not allowed middle of this process. You have to Undo or finalize the salary to calculate tax.");
                }
                this.CurrentYearTax = new List<IncomeTax>();
                this.CurrentYearTax = new IncomeTaxService().Get(_employee.ID, EnumIncomeTaxDataFrom.ProcessTempData);

                this._projectedMonth = 0;
                foreach (IncomeTax item in this.CurrentYearTax)
                {
                     item.PreviousAmount = item.PreviousAmount + item.ThisMonthAmount;
                    item.ThisMonthAmount = 0;
                    item.ProjectedAmount = 0;
                }
                this.UpdateRawItems(rawItems, EnumSide.Add);
                this.CmpProvidedHouseAndTransport((DateTime)_employee.DiscontinueDate);
                this.CalculateExamtion();
                this.CalculateTotalIncome();
                this.CalculateInvestment();
                this.CalculateGrossTax();
                this.CalculateNetPayable();

                IncomeTax TaxDeductitem = _currentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
                        && x.ItemGroup == EnumIncomeTaxItemGroup.Tax_Deducted && x.ItemID == (int)EnumIncomeTaxItemGroup.Tax_Deducted);
                IncomeTax netPayable = _currentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
                        && x.ItemGroup == EnumIncomeTaxItemGroup.Net_Payable && x.ItemID == (int)EnumIncomeTaxItemGroup.Net_Payable);

                TaxDeductitem.ThisMonthAmount = netPayable.TotalAmount - TaxDeductitem.TotalAmount;
                return this.CurrentYearTax;
            }
            catch (ServiceException ex)
            {
                throw new ServiceException(ex.Message);
            }
            catch (Exception ex)
            {
                throw new ServiceException(ex.Message);
            }
        }
        /// <summary>
        /// function will return total year tax, 
        /// </summary>
        /// <param name="rawItems"></param>
        /// <param name="ntaxAmount"></param>
        /// <returns></returns>

        public List<IncomeTax> CalculateYearlyTax(List<TaxRawItem> rawItems, ref double ntaxAmount)
        {
            try
            {
                this.CurrentYearTax = new List<IncomeTax>();

                _isActualInvestment = false;
                _projectedMonth = 0;
                this._onceoffAmount = 0;

                this.UpdateRawItems(rawItems, EnumSide.Add);
                this.CmpProvidedHouseAndTransport(this.payrolltype.NextPayProcessDate);
                this.CalculateExamtion();
                this.CalculateBonusProjection();
                this.CalculateCPF();
                this.CalculateTotalIncome();
                this.CalculateInvestment();
                this.CalculateGrossTax();
                this.CalculateNetPayable();
                this.CalculateThisMonth();
                ntaxAmount = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID && x.ItemGroup == EnumIncomeTaxItemGroup.Tax_Deducted
                                       && x.ItemID == (int)EnumIncomeTaxItemGroup.Tax_Deducted).TotalAmount;
                return this.CurrentYearTax;
            }
            catch (ServiceException ex)
            {
                throw new ServiceException(ex.Message);
            }
            catch (Exception ex)
            {
                throw new ServiceException(ex.Message);
            }
        }

        public List<IncomeTax> UndoCalculate(List<TaxRawItem> rawItems, double taxAmount)
        {
            try
            {
                _isActualInvestment = true;
                this._onceoffAmount = 0;

                IncomeTax oIncomeTax = new IncomeTax();
                EnumIncomeTaxDataFrom datafrom = new IncomeTaxService().GetEnumForSalaryIT(_employee.ID);
                if (datafrom == EnumIncomeTaxDataFrom.SalaryITTempData)
                {
                    throw new ServiceException("Current month salary is processed and not yet finalized. Tax calculation "
                        + " is not allowed middle of this process. You have to Undo or finalize the salary to calculate tax.");
                }

                this.CurrentYearTax = new List<IncomeTax>();
                this.CurrentYearTax = new IncomeTaxService().Get(_employee.ID, EnumIncomeTaxDataFrom.ProcessTempData);

                this.CalcualteprojectMonth();
                //foreach (IncomeTax item in this.CurrentYearTax)
                //    item.ProjectedAmount = 0;

                this.UpdateRawItems(rawItems, EnumSide.Deduct);
                this.CmpProvidedHouseAndTransport(this.payrolltype.NextPayProcessDate);
                this.CalculateExamtion();
                this.CalculateBonusProjection();
                this.CalculateCPF();
                this.CalculateTotalIncome();
                this.CalculateInvestment();
                this.CalculateGrossTax();
                this.CalculateNetPayable();
                this.UndoDecutedAmount(taxAmount);
                return this.CurrentYearTax;
            }
            catch (ServiceException ex)
            {
                throw new ServiceException(ex.Message);
            }
            catch (Exception ex)
            {
                throw new ServiceException(ex.Message);
            }
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="naxParameterID"></param>
        public List<IncomeTax> DoTaxYearEnd(int payrolltypeid)
        {
            List<IncomeTax> empTaxCertificates = new List<IncomeTax>();
            PayrollType ptyp = new PayrollTypeService().Get(payrolltypeid);
            List<Employee> employess = new EmployeeService().GetAllEmps();
            try
            {
                // if IncomeTax.get() function not return employee order-by wise data, rest of the function will not culculate properly.                
                List<IncomeTax> oTaxYearly = new IncomeTaxService().Get(EnumIncomeTaxDataFrom.ProcessTempData, ptyp.ID);
                oTaxYearly = oTaxYearly.OrderBy(x=>x.EmployeeID).ToList();
                int? nCurrEmployeeid = null;
                if (oTaxYearly.Count > 0) nCurrEmployeeid = oTaxYearly[0].EmployeeID;
                _taxParameter = new TaxParameterService().Get((int)ptyp.TaxParamID);
                this.payrolltype = ptyp;
                while (true)
                {
                    _employee = employess.FirstOrDefault(x => x.ID == oTaxYearly[0].EmployeeID);
                    this.CurrentYearTax = oTaxYearly.FindAll(x => x.EmployeeID == nCurrEmployeeid);
                    if (this.CurrentYearTax == null) continue;
                    if (_employee.Status != EnumEmployeeStatus.Live)
                    {
                        foreach (IncomeTax item in this.CurrentYearTax) item.ProjectedAmount = 0;

                        _isActualInvestment = false;
                        this._onceoffAmount = 0;
                        this.CalculateExamtion();
                        this.CalculateTotalIncome();
                        this.CalculateInvestment();
                        this.CalculateGrossTax();
                        this.CalculateNetPayable();
                        this.CalculateYearlyRefund();
                    }

                    foreach (IncomeTax item in this.CurrentYearTax)
                    {
                        item.TaxParameterID = (int)ptyp.TaxParamID; 
                        empTaxCertificates.Add(item);
                        oTaxYearly.Remove(item);
                    }


                    if (oTaxYearly.Count > 0) nCurrEmployeeid = oTaxYearly[0].EmployeeID;
                    else break;
                }
            }
            catch (Exception ex)
            {
                throw new ServiceException(ex.Message);
            }
            return empTaxCertificates;
        }
        //public List<IncomeTax> DoTaxYearEndReProcess(int nTaxParamterID, bool isMaximumInvestment)
        //{
        //    List<IncomeTax> empTaxCertificates = new List<IncomeTax>();

        //    try
        //    {
        //        // if IncomeTax.get() function not return employee order-by wise data, rest of the function will not culculate properly.                
        //        List<IncomeTax> oTaxYearly = new IncomeTaxService().GetPrvYear(nTaxParamterID, this.payrolltype.ID);
        //        if (this.payrolltype.TaxParamID == nTaxParamterID)
        //            oTaxYearly = new IncomeTaxService().GetByYear(nTaxParamterID, EnumIncomeTaxDataFrom.ProcessTempData, this.payrolltype.ID);
        //        else
        //            oTaxYearly = new IncomeTaxService().GetPrvYear(nTaxParamterID, this.payrolltype.ID);
        //        int? nCurrEmployeeid = null;
        //        if (oTaxYearly.Count > 0) nCurrEmployeeid = oTaxYearly[0].EmployeeID;
        //        _taxParameter = new TaxParameterService().Get(nTaxParamterID);
        //        while (true)
        //        {
        //            _employee = new EmployeeService().Get((int)nCurrEmployeeid);


        //            this.CurrentYearTax = oTaxYearly.FindAll(x => x.EmployeeID == nCurrEmployeeid);

        //            // Initialize the current data.
        //            foreach (IncomeTax item in this.CurrentYearTax)
        //            {
        //                item.ProjectedAmount = 0;
        //                oTaxYearly.Remove(item); // Remove from collection
        //            }

        //            _isActualInvestment = !isMaximumInvestment;

        //            IncomeTax car = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
        //                && x.ItemGroup == EnumIncomeTaxItemGroup.Cmp_Provided_car && x.ItemID == (int)EnumIncomeTaxItemGroup.Cmp_Provided_car);
        //            if (car != null)
        //            {
        //                if (car.TotalAmount < 60000)
        //                    car.TotalAmount = 60000;
        //            }

        //            this.CalculateExamtion();

        //            this.CalculateTotalIncome();
        //            this.CalculateInvestment();
        //            this.CalculateGrossTax();
        //            this.CalculateNetPayable();
        //            this.CalculateYearlyRefund();

        //            foreach (IncomeTax item in this.CurrentYearTax)
        //            {
        //                item.EmployeeID = _employee.ID;
        //                item.TaxParameterID = nTaxParamterID;
        //                empTaxCertificates.Add(item);
        //            }


        //            if (oTaxYearly.Count > 0) nCurrEmployeeid = oTaxYearly[0].EmployeeID;
        //            else break;
        //        }
        //    }
        //    catch (Exception ex)
        //    {
        //        throw new ServiceException(ex.Message);
        //    }
        //    return empTaxCertificates;
        //}

        public List<IncomeTax> CalculateLTATax(List<TaxRawItem> rawItems, ref double ntaxAmount)
        {
            double namount = rawItems.Select(c => c.Amount).Sum(); ;
            return this.CalculateLTATax(rawItems, namount, ref ntaxAmount);
        }
        public List<IncomeTax> CalculateLTATax(List<TaxRawItem> rawItems, double onceoffAmount, ref double ntaxAmount)
        {
            try
            {
                _isActualInvestment = true;
                this._onceoffAmount = onceoffAmount;

                IncomeTax oIncomeTax = new IncomeTax();
                EnumIncomeTaxDataFrom datafrom = new IncomeTaxService().GetEnumForSalaryIT(_employee.ID);
                if (datafrom == EnumIncomeTaxDataFrom.SalaryITTempData)
                {
                    throw new ServiceException("Current month salary is processed and not yet finalized. Tax calculation "
                        + " is not allowed middle of this process. You have to Undo or finalize the salary to calculate tax.");
                }
                this.CurrentYearTax = new List<IncomeTax>();
                this.CurrentYearTax = new IncomeTaxService().Get(_employee.ID, EnumIncomeTaxDataFrom.ProcessTempData);


                this.CalcualteprojectMonth();
                _projectedMonth = _projectedMonth + 1;
                foreach (IncomeTax item in this.CurrentYearTax)
                {
                    item.PreviousAmount = item.PreviousAmount + item.ThisMonthAmount;
                    item.ThisMonthAmount = 0;
                    //if (item.ItemGroup != EnumIncomeTaxItemGroup.Other_Allowance)
                    //    item.ProjectedAmount = 0;
                }
                this.UpdateRawItems(rawItems, EnumSide.Add);
                //   this.CmpProvidedHouseAndTransport(SystemInformation.CurrentSysInfo.LastPayProcessDate.AddMonths(-1));
                this.CalculateExamtion();
                //   this.CalculateBonusProjection();
                this.CalculateCPF();
                this.CalculateTotalIncome();
                this.CalculateInvestment();
                this.CalculateGrossTax();
                this.CalculateNetPayable();
                ntaxAmount = this.CulculateArrearOnMonth();
                return this.CurrentYearTax;
            }
            catch (ServiceException ex)
            {
                throw new ServiceException(ex.Message);
            }
            catch (Exception ex)
            {
                throw new ServiceException(ex.Message);
            }
        }

        public List<IncomeTax> UndoEncashAmount(List<TaxRawItem> oTaxRowItems, double nTaxAmount)
        {
            try
            {
                _isActualInvestment = true;
                this._onceoffAmount = 0;

                IncomeTaxService tempIncomeTaxService = new IncomeTaxService();

                EnumIncomeTaxDataFrom datafrom = tempIncomeTaxService.GetEnumForSalaryIT(_employee.ID);
                if (datafrom == EnumIncomeTaxDataFrom.SalaryITTempData)
                {
                    throw new ServiceException("Current month salary is processed and not yet finalized. Tax calculation "
                                               + " is not allowed middle of this process. You have to Undo or finalize the salary to calculate tax.");
                }

                this.CurrentYearTax = new List<IncomeTax>();
                this.CurrentYearTax = tempIncomeTaxService.Get(_employee.ID, EnumIncomeTaxDataFrom.ProcessTempData);

                this.UpdateRawItemsForEncash(oTaxRowItems, EnumSide.Deduct);
                //this.CalculateBonusProjection();
                IncomeTax taxitem = this.CurrentYearTax.Find(x => x.Description == "Leave Encashment" && x.ItemGroup == EnumIncomeTaxItemGroup.Earned_Leave && x.ItemID == 100);
                if (taxitem != null)
                    taxitem.ThisMonthAmount = 0;
                this.CalculateTotalIncome();
                this.CalculateInvestment();
                this.CalculateGrossTax();
                this.CalculateNetPayable();
                this.UndoDecutedAmount(nTaxAmount);
                return this.CurrentYearTax;
            }
            catch (ServiceException ex)
            {
                throw new ServiceException(ex.Message);
            }
            catch (Exception ex)
            {
                throw new ServiceException(ex.Message);
            }
        }
        protected void UpdateRawItemsForEncash(List<TaxRawItem> rawItems, EnumSide nSide)
        {
            foreach (TaxRawItem item in rawItems)
            {
                if (item.Amount == 0) continue;
                IncomeTax taxItem = null;
                //nSide = EnumSide.Add;
                switch (item.ItemType)
                {
                    case enumIncomeTaxItemType.Basic_Salary:
                        taxItem = GetTaxItem(EnumTaxMergeType.NONE, (int)EnumIncomeTaxItemGroup.Basic_Salary, item.Description);
                        break;
                    case enumIncomeTaxItemType.Allowance:
                        taxItem = GetTaxItem(EnumTaxMergeType.Allowance, item.ItemId, item.Description);
                        break;
                    case enumIncomeTaxItemType.Deduction:
                        taxItem = GetTaxItem(EnumTaxMergeType.Allowance, item.ItemId, item.Description);
                        break;
                    case enumIncomeTaxItemType.OT:
                        taxItem = GetTaxItem(EnumTaxMergeType.OT, item.ItemId, item.Description);
                        break;
                    case enumIncomeTaxItemType.Bonus:
                        taxItem = GetTaxItem(EnumTaxMergeType.Bonus, item.ItemId, item.Description);
                        break;
                    case enumIncomeTaxItemType.FinalSettlement:
                        taxItem = GetTaxItem(EnumTaxMergeType.Settlement, item.ItemId, item.Description);
                        break;
                    case enumIncomeTaxItemType.OPI:
                        //taxItem = GetTaxItem(EnumTaxMergeType.Bonus, item.ItemId, item.Description);
                        //taxItem.ThisMonthAmount = GlobalFunctions.Round(item.Amount);
                        break;
                    case enumIncomeTaxItemType.AdjustItem:
                        taxItem = GetTaxItem(EnumTaxMergeType.TaxAdjustItem, item.ItemId, item.Description);
                        break;
                    case enumIncomeTaxItemType.Earned_Leave:
                        taxItem = GetTaxItem(EnumTaxMergeType.LeaveEncashment, 100, item.Description);
                        break;
                    case enumIncomeTaxItemType.Compensation:
                        taxItem = GetTaxItem(EnumTaxMergeType.Compensation, 0, item.Description);
                        break;
                    case enumIncomeTaxItemType.NoticePay:
                        taxItem = GetTaxItem(EnumTaxMergeType.NoticePayDeduction, 0, item.Description);
                        nSide = EnumSide.Deduct;
                        break;
                    default:
                        break;
                }

                if (taxItem != null)
                {
                    taxItem.ThisMonthAmount = 0;
                    if (taxItem != null) taxItem.Side = nSide == EnumSide.Add ? EnumIncomeTaxSide.Inc_SalaryIncome : EnumIncomeTaxSide.Dec_SalaryIncome;
                    this.Add(taxItem);
                }
            }

        }

        private void Add(IncomeTax taxItem)
        {
            if (taxItem.Position == 0)
            {
                ProcessItem pitem = _processItems.Find(delegate (ProcessItem item)
                    { return item.ItemCode == (int)taxItem.ItemGroup; });
                if (pitem == null) throw new ServiceException("Tax process item code not found in the process collection; Item Code:" + taxItem.ItemGroup.ToString());
                taxItem.Position = pitem.Position;
            }

            IncomeTax existItem = _currentYearTax.Find(delegate (IncomeTax item)
                { return item.ItemGroup == taxItem.ItemGroup && item.ItemID == taxItem.ItemID; });
            if (existItem == null) _currentYearTax.Add(taxItem);
            else
            {
                existItem.PreviousAmount = existItem.PreviousAmount + taxItem.PreviousAmount;
                existItem.ThisMonthAmount = existItem.ThisMonthAmount + taxItem.ThisMonthAmount;
                existItem.ProjectedAmount = existItem.ProjectedAmount + taxItem.ProjectedAmount;
                existItem.Position = taxItem.Position;
                existItem.Description = taxItem.Description;
            }
        }

        public List<IncomeTax> CalculateEncashAmount(List<TaxRawItem> rawItems, ref double ntaxAmount, DateTime nextPayProcessDate)
        {
            try
            {
                double nTempAmount = 0;
                bool bStartMonth = false;
                _isActualInvestment = true;
                this._onceoffAmount = rawItems.Sum(x => x.Amount);

                IncomeTaxService tempIncomeTaxService = new IncomeTaxService();
                EnumIncomeTaxDataFrom datafrom = tempIncomeTaxService.GetEnumForSalaryIT(_employee.ID);
                if (datafrom == EnumIncomeTaxDataFrom.SalaryITTempData)
                {
                    throw new ServiceException("Current month salary is processed and not yet finalized. Tax calculation "
                        + " is not allowed middle of this process. You have to Undo or finalize the salary to calculate tax.");
                }
                if (this.CurrentYearTax == null)
                {
                    this.CurrentYearTax = new List<IncomeTax>();
                    this.CurrentYearTax = tempIncomeTaxService.Get(_employee.ID, EnumIncomeTaxDataFrom.ProcessTempData);
                }

                if (nextPayProcessDate.Month == 7) // if month is july and salary not yet processed then, clear all tax data
                {
                    bStartMonth = true;
                    this.CalcualteprojectMonth();
                    this.CalculateOnlyProjection();
                }
                this.UpdateRawItems(rawItems, EnumSide.Add);
                IncomeTax taxitem = this.CurrentYearTax.Find(x => x.Description == "Leave Encashment" && x.ItemGroup == EnumIncomeTaxItemGroup.Earned_Leave && x.ItemID == 100);
                if (taxitem != null)
                    taxitem.Side = EnumIncomeTaxSide.Inc_SalaryIncome;
                this.CalculateExamtion();
                //this.CalculateBonusProjection();
                this.CalculateCPF();
                this.CalculateTotalIncome();
                this.CalculateInvestment();
                this.CalculateGrossTax();


                double totalAmount = 0;
                IncomeTax netPayable = tempIncomeTaxService.Get(this.CurrentYearTax, _employee.ID,
                         EnumIncomeTaxItemGroup.Net_Payable, (int)EnumIncomeTaxItemGroup.Net_Payable);
                if (netPayable != null)
                    nTempAmount = netPayable.TotalAmount;
                ntaxAmount = 0;
                this.CalculateNetPayable();



                ntaxAmount = nTempAmount;
                //netPayable = IncomeTax.Get(this.CurrentYearTax, _employee.ID, EnumIncomeTaxItemGroup.Net_Payable, (int)EnumIncomeTaxItemGroup.Net_Payable);
                if (netPayable != null)
                    if (totalAmount > 0)
                        ntaxAmount = netPayable.TotalAmount - totalAmount;
                    else
                        ntaxAmount = (-totalAmount - netPayable.TotalAmount) > 0 ? 0 : netPayable.TotalAmount;

                double grossTax = tempIncomeTaxService.Get(this.CurrentYearTax, _employee.ID,
                             EnumIncomeTaxItemGroup.Gross_Tax, (int)EnumIncomeTaxItemGroup.Gross_Tax).TotalAmount;

                if (_onceoffAmount > 0)
                {

                    double annualIncome = this.GetAnnualIncome();
                    ntaxAmount = grossTax - this.GetTaxAmount(annualIncome - _onceoffAmount);
                    ntaxAmount = ntaxAmount - CalculateOnceOfInvestmentAmt(annualIncome - _onceoffAmount);
                    if (ntaxAmount < 0) ntaxAmount = 0;
                }

                IncomeTax TaxDeductitem = tempIncomeTaxService.Get(this.CurrentYearTax, _employee.ID,
                           EnumIncomeTaxItemGroup.Tax_Deducted, (int)EnumIncomeTaxItemGroup.Tax_Deducted);
                if (TaxDeductitem == null) TaxDeductitem = this.Add(EnumIncomeTaxItemGroup.Tax_Deducted,
                                    (int)EnumIncomeTaxItemGroup.Tax_Deducted, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_fixed_Item);

                TaxDeductitem.ThisMonthAmount = TaxDeductitem.ThisMonthAmount + ntaxAmount;


                return this.CurrentYearTax;
            }
            catch (ServiceException ex)
            {
                throw new ServiceException(ex.Message);
            }
            catch (Exception ex)
            {
                throw new ServiceException(ex.Message);
            }
        }

        public double getSalaryAmount(List<SalaryMonthly> salareis, int employeeid, EnumSalaryItemCode ItemCode, int ItemID)
        {
            double aAmount = 0;

            List<SalaryMonthly> empsalareis = salareis.FindAll(x => x.EmployeeID == employeeid).ToList();
            if (empsalareis != null)
            {
                empsalareis.ForEach(x =>
                {
                    x.Details.ForEach(y =>
                    {
                        if (ItemCode == EnumSalaryItemCode.PF_Contribution || ItemCode == EnumSalaryItemCode.Inc_Tax_Deduction)
                        {
                            if (y.ItemCode == ItemCode && (y.itemGroupCode == EnumSalaryGroup.Deductions) && y.ItemID == ItemID)
                            {
                                aAmount = aAmount + y.ChangedAmount;
                            }
                        }
                        else if (ItemCode == EnumSalaryItemCode.Deduction && ItemCode != EnumSalaryItemCode.PF_Contribution)
                        {
                            if (y.ItemCode == ItemCode && (y.itemGroupCode == EnumSalaryGroup.Deductions) && y.ItemID == ItemID)
                            {
                                aAmount = aAmount - y.ChangedAmount;
                            }
                        }
                        else
                        {
                            if (y.ItemCode == ItemCode && (y.itemGroupCode == EnumSalaryGroup.Gross
                        || y.itemGroupCode == EnumSalaryGroup.Arrear) && y.ItemID == ItemID)
                            {
                                aAmount = aAmount + y.ChangedAmount;
                            }
                        }
                    });
                });
            }
            return aAmount;
        }

        public double GetConvertedAmount(EnumIncomeTaxItemGroup taxGroup, int taxItemID, string name,
          List<TaxMergeMaster> taxmergs, List<SalaryMonthly> salareis,
          List<BonusProcess.BonusProcessDetail> BonusPayments, EnumSalaryItemCode? ItemCode)
        {
            double Amount = 0;
            List<TaxMergeMaster> txgs = taxmergs.Where(x => x.ItemGroup == taxGroup && x.ItemID == taxItemID).ToList();
            if (txgs != null)
            {
                foreach (TaxMergeMaster master in txgs)
                {
                    if (master.Description != name) continue;
                    foreach (TaxMergeMaster.TaxMergeDetail mergeDetail in master.TaxMergeDetails)
                    {

                        if (mergeDetail.Type == EnumTaxMergeType.Allowance)
                        {
                            Amount = Amount + this.getSalaryAmount(salareis, _employee.ID,
                                EnumSalaryItemCode.Allowance, mergeDetail.ItemID);
                        }
                        else if (mergeDetail.Type == EnumTaxMergeType.Deduction)
                        {
                            Amount = Amount + this.getSalaryAmount(salareis, _employee.ID,
                                EnumSalaryItemCode.Deduction, mergeDetail.ItemID);
                        }
                        else if (mergeDetail.Type == EnumTaxMergeType.OT)
                        {
                            Amount = Amount + this.getSalaryAmount(salareis, _employee.ID,
                                EnumSalaryItemCode.Over_Time_Amount, mergeDetail.ItemID);
                        }
                        else if (mergeDetail.Type == EnumTaxMergeType.Bonus)
                        {
                            Amount = Amount + BonusPayments.Where(x => x.EmployeeID == _employee.ID 
                            && x.BonusID == mergeDetail.ItemID).Sum(x => x.ChangeBonusAmount);

                        }
                        else if (ItemCode != null)
                        {
                            Amount = Amount + this.getSalaryAmount(salareis, _employee.ID,
                               (EnumSalaryItemCode)ItemCode, (int)ItemCode);

                        }
                        else
                        {
                            /// throw new Exception("Merge head not found");
                        }
                    }
                }
            }
            else
            {
                if (ItemCode != null)
                {
                    Amount = Amount + this.getSalaryAmount(salareis, _employee.ID,
                       (EnumSalaryItemCode)ItemCode, (int)ItemCode);

                }
            }
            return Amount;
        }
        public List<IncomeTax> TaxReconsiliation(int payrolltypeid, List<Employee> emps,  
            int nTaxParamterID, EnumIncomeTaxDataFrom datafrom)
        {
            List<SalaryMonthly> salareis = null;
            List<BonusProcess.BonusProcessDetail> bonuspaments = null;
            List<IncomeTax> empTaxCertificates = new List<IncomeTax>();
            List<IncomeTax> oTaxYearly = null;
            string inSQL = Employee.getEmpID(emps);
            List<ITEmpHead> assignedHeads = new ITEmpHeadService().GetWithTaxParam(nTaxParamterID);
            PayrollType ptype = new PayrollTypeService().Get(payrolltypeid);
            List<EmployeeTaxInvestment> empInvestments = new EmployeeTaxInvestmentService().GetAllUsersInfo(nTaxParamterID);
            double ProjectedMonths = 0;
            bool isExemptionYearly = new SystemConfigarationService().GetconfigBooleanValue(EnumConfigurationType.Logic, "incometax", "monthlyexemption");
            bool IsmaximumInvestment = new SystemConfigarationService().GetconfigBooleanValue(EnumConfigurationType.Logic, "incometax", "investmentwithoutpf");
            this._processItems = new ProcessItemService().Get();
            this.payrolltype = ptype;
            bool binvestmenton = new SystemConfigarationService().GetconfigBooleanValue(EnumConfigurationType.Logic, "incometax", "investmentwithoutpf");

            try
            {
                if (ptype.TaxParamID == nTaxParamterID)
                {
                    oTaxYearly = new IncomeTaxService().Get(datafrom, inSQL, payrolltypeid, null);
                }
                else
                    oTaxYearly = new IncomeTaxService().Get(datafrom, inSQL, payrolltypeid, nTaxParamterID);

                _taxParameter = new TaxParameterService().Get(nTaxParamterID);


                if (emps != null)
                {
                    salareis = new SalaryMonthlyService().Get(inSQL, _taxParameter.FiscalyearDatefrom, _taxParameter.FiscalyearDateTo, payrolltypeid);
                    bonuspaments = new BonusProcessService().GetBonusDetailsByEmps(inSQL, _taxParameter.FiscalyearDatefrom, _taxParameter.FiscalyearDateTo, payrolltypeid);
                }
                else
                {
                    List<Employee> allemp = new EmployeeService().GetAllEmps(payrolltypeid);
                    salareis = new  SalaryMonthlyService().GetByDateRange(_taxParameter.FiscalyearDatefrom, _taxParameter.FiscalyearDateTo, payrolltypeid);

                    emps = new List<BO.Employee>();
                    foreach (Employee item in allemp)
                    {
                        var isexist = salareis.FirstOrDefault(x => x.EmployeeID == item.ID);
                        if (isexist != null)
                        {
                            emps.Add(item);
                        }
                    }
                    bonuspaments = new BonusProcessService().GetBonusDetailsByEmps(inSQL, _taxParameter.FiscalyearDatefrom, _taxParameter.FiscalyearDateTo, payrolltypeid);
                }

                List<TaxMergeMaster> taxMerges = new TaxMergeMasterService().GetbyTaxParameter(_taxParameter.ID, payrolltypeid);
                foreach (Employee emp in emps)
                {
                    _employee = emp; //employees.FirstOrDefault(x => x.ID.Integer == nCurrEmployeeid.Integer); 
                    _isActualInvestment = true;
                    _projectedMonth = 12 - (((ptype.NextPayProcessDate.Year - ptype.TaxYearEndDate.Year) * 12)
                + ptype.NextPayProcessDate.Month - ptype.TaxYearEndDate.Month);
                    if (ProjectedMonths < 0) ProjectedMonths = 0;

                    if (emp.EndOfContractDate != null && emp.EndOfContractDate != DateTime.MinValue)
                    {
                        if (emp.EndOfContractDate < _taxParameter.FiscalyearDateTo)
                            if (((DateTime)emp.EndOfContractDate).Month == 7)
                                ProjectedMonths = Convert.ToDouble(0);
                            else
                                ProjectedMonths = GlobalFunctions.GetFraction(this.payrolltype.NextPayProcessDate.AddDays(1), (DateTime)emp.EndOfContractDate);
                       
                    }


                    this.CurrentYearTax =oTaxYearly.FindAll(x=>x.EmployeeID== _employee.ID);

                    #region Calculate From Salary & Bonus
                    double basicSalary = 0;
                    IncomeTax HrExption = this.CurrentYearTax.FirstOrDefault(x=>x.EmployeeID== _employee.ID
                        && x.ItemGroup == EnumIncomeTaxItemGroup.Exemption_House_Rent_Allowance 
                        && x.ItemID == (int)EnumIncomeTaxItemGroup.Exemption_House_Rent_Allowance);

                    if (HrExption == null) HrExption = this.Add(EnumIncomeTaxItemGroup.Exemption_House_Rent_Allowance,
                        (int)EnumIncomeTaxItemGroup.Exemption_House_Rent_Allowance, string.Empty, 0, 0, EnumIncomeTaxSide.Dec_SalaryIncome);
                    HrExption.Description = "HR Exemption";

                    IncomeTax convExption = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
                        && x.ItemGroup == EnumIncomeTaxItemGroup.Exemption_Conveyance_Allowance
                        && x.ItemID == (int)EnumIncomeTaxItemGroup.Exemption_Conveyance_Allowance);
                    if (convExption == null) convExption = this.Add(EnumIncomeTaxItemGroup.Exemption_Conveyance_Allowance,
                        (int)EnumIncomeTaxItemGroup.Exemption_Conveyance_Allowance, string.Empty, 0, 0, EnumIncomeTaxSide.Dec_SalaryIncome);
                    convExption.Description = "Transport Exemption";

                    IncomeTax mdExption = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
                        && x.ItemGroup == EnumIncomeTaxItemGroup.Exemption_Medical_Allowance
                        && x.ItemID == (int)EnumIncomeTaxItemGroup.Exemption_Medical_Allowance);
                    if (mdExption == null) mdExption = this.Add(EnumIncomeTaxItemGroup.Exemption_Medical_Allowance, (int)EnumIncomeTaxItemGroup.Exemption_Medical_Allowance, string.Empty, 0, 0, EnumIncomeTaxSide.Dec_SalaryIncome);
                    mdExption.Description = "Medical Exemption";

                    IncomeTax lfaExption = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
                        && x.ItemGroup == EnumIncomeTaxItemGroup.Exemption_LFA_Allowance
                        && x.ItemID == (int)EnumIncomeTaxItemGroup.Exemption_LFA_Allowance);
                    if (lfaExption == null) lfaExption = this.Add(EnumIncomeTaxItemGroup.Exemption_LFA_Allowance, (int)EnumIncomeTaxItemGroup.Exemption_LFA_Allowance, string.Empty, 0, 0, EnumIncomeTaxSide.Dec_SalaryIncome);
                    mdExption.Description = "LFA Exemption";

                    foreach (IncomeTax item in this.CurrentYearTax)
                    {
                        if (item.Side != EnumIncomeTaxSide.Inc_SalaryIncome &&
                            item.Side != EnumIncomeTaxSide.Inc_AnnualIncome)
                            continue;

                        if (ProjectedMonths == 0) item.ProjectedAmount = 0;
                        double salaryCount = salareis.Count(x => x.EmployeeID == _employee.ID);
                        double reAmount = 0;
                        item.ThisMonthAmount = item.PreviousAmount + item.ThisMonthAmount + item.ProjectedAmount;
                        item.PreviousAmount = item.ProjectedAmount;


                        switch (item.ItemGroup)
                        {
                            case EnumIncomeTaxItemGroup.None:
                                break;
                            case EnumIncomeTaxItemGroup.Basic_Salary:
                                reAmount = this.GetConvertedAmount(EnumIncomeTaxItemGroup.Basic_Salary, item.ItemID, item.Description, taxMerges, salareis, bonuspaments, EnumSalaryItemCode.Basic_Salary);
                                basicSalary = reAmount + item.ProjectedAmount;
                                break;
                            case EnumIncomeTaxItemGroup.House_Rent_Allowance:
                                reAmount = this.GetConvertedAmount(EnumIncomeTaxItemGroup.House_Rent_Allowance, item.ItemID, item.Description, taxMerges,
                                    salareis, bonuspaments, null);

                                List<SalaryMonthly> empsalareis = salareis.FindAll(x => x.EmployeeID == _employee.ID).ToList();

                                if (isExemptionYearly == false)
                                {
                                    TaxMergeMaster txg = taxMerges.FirstOrDefault(x => x.ItemGroup == EnumIncomeTaxItemGroup.House_Rent_Allowance);
                                    double HRexemptedAmount = 0;
                                    double LasHRExemptedAmount = 0;
                                    if (empsalareis != null)
                                    {
                                        empsalareis.ForEach(x =>
                                        {
                                            double monthlyBasic = 0;
                                            double monthlyHouserent = 0;
                                            x.Details.ForEach(y =>
                                            {
                                                if (y.ItemCode == EnumSalaryItemCode.Basic_Salary && (y.itemGroupCode == EnumSalaryGroup.Gross
                                                || y.itemGroupCode == EnumSalaryGroup.Arrear) && y.ItemID == (int)EnumSalaryItemCode.Basic_Salary)
                                                {
                                                    monthlyBasic = monthlyBasic + y.ChangedAmount;
                                                }


                                                foreach (TaxMergeMaster.TaxMergeDetail mergeDetail in txg.TaxMergeDetails)
                                                {
                                                    if (y.ItemCode == EnumSalaryItemCode.Allowance && (y.itemGroupCode == EnumSalaryGroup.Gross
                                                      || y.itemGroupCode == EnumSalaryGroup.Arrear) && y.ItemID == mergeDetail.ItemID)
                                                    {
                                                        monthlyHouserent = monthlyHouserent + y.ChangedAmount;
                                                    }
                                                }
                                            });

                                            double basicPercent = monthlyBasic * _taxParameter.MaxHRPercent / 100;
                                            if (monthlyHouserent > _taxParameter.MaxHRAmount / 12) monthlyHouserent = _taxParameter.MaxHRAmount / 12;

                                            if (monthlyHouserent > basicPercent)
                                            {
                                                HRexemptedAmount = HRexemptedAmount + basicPercent;
                                                LasHRExemptedAmount = basicPercent;
                                            }
                                            else
                                            {
                                                HRexemptedAmount = HRexemptedAmount + monthlyHouserent;
                                                LasHRExemptedAmount = monthlyHouserent;
                                            }

                                        });
                                    }
                                    HRexemptedAmount = HRexemptedAmount + LasHRExemptedAmount * ProjectedMonths;
                                    HrExption.ThisMonthAmount = HrExption.ThisMonthAmount + HrExption.ProjectedAmount + HrExption.PreviousAmount;

                                    HrExption.PreviousAmount = HRexemptedAmount;
                                }
                                else
                                {
                                    double yearlyHR = basicSalary * _taxParameter.MaxHRPercent / 100;
                                    if (yearlyHR > _taxParameter.MaxHRAmount) yearlyHR = _taxParameter.MaxHRAmount;
                                    if (yearlyHR > reAmount) yearlyHR = reAmount;
                                    HrExption.ThisMonthAmount = HrExption.ThisMonthAmount + HrExption.ProjectedAmount + HrExption.PreviousAmount;
                                    HrExption.PreviousAmount = yearlyHR;
                                }
                                //HrExption.Description = "HR Exemption";
                                break;
                            case EnumIncomeTaxItemGroup.Conveyance_Allowance:

                                reAmount = this.GetConvertedAmount(EnumIncomeTaxItemGroup.Conveyance_Allowance, item.ItemID, item.Description, taxMerges,
                                    salareis, bonuspaments, null);

                                //if (isExemptionYearly == false)
                                //{

                                //    convExption.ThisMonthAmount = convExption.ThisMonthAmount + convExption.ProjectedAmount + convExption.PreviousAmount;
                                //    double convAmount = (salaryCount + ProjectedMonths) * (_taxParameter.MaxConvAmount / 12);
                                //    if (reAmount + item.ProjectedAmount > convAmount)
                                //        convExption.PreviousAmount = convAmount;
                                //    else convExption.PreviousAmount = reAmount + item.ProjectedAmount;
                                //}
                                //else
                                //{
                                convExption.ThisMonthAmount = convExption.ThisMonthAmount + convExption.ProjectedAmount + convExption.PreviousAmount;
                                if (reAmount + item.ProjectedAmount > _taxParameter.MaxConvAmount)
                                    convExption.PreviousAmount = _taxParameter.MaxConvAmount;
                                else convExption.PreviousAmount = reAmount + +item.ProjectedAmount;
                                //}
                                //convExption.Description = "Transport Exemption";
                                break;

                            case EnumIncomeTaxItemGroup.Medical_Allowance:
                                reAmount = this.GetConvertedAmount(EnumIncomeTaxItemGroup.Medical_Allowance, item.ItemID, item.Description, taxMerges,
                                    salareis, bonuspaments, null);

                                mdExption.ThisMonthAmount = mdExption.ThisMonthAmount + mdExption.ProjectedAmount + mdExption.PreviousAmount;
                                double nconvAmount = basicSalary * _taxParameter.MaxMedicalPercent / 100;
                                if (nconvAmount > _taxParameter.MaxMedicalAmount)
                                    nconvAmount = _taxParameter.MaxMedicalAmount;
                                if (reAmount + item.ProjectedAmount < nconvAmount)
                                    nconvAmount = reAmount + item.ProjectedAmount;
                                mdExption.PreviousAmount = nconvAmount;


                                //mdExption.Description = item.Description + " Exemption";
                                break;
                            case EnumIncomeTaxItemGroup.Company_Contri_PF:
                                reAmount = this.GetConvertedAmount(EnumIncomeTaxItemGroup.Company_Contri_PF, item.ItemID, item.Description, taxMerges,
                                    salareis, bonuspaments, EnumSalaryItemCode.PF_Contribution);
                                item.Description = "PF";
                                break;
                            case EnumIncomeTaxItemGroup.Bonus:
                                reAmount = this.GetConvertedAmount(EnumIncomeTaxItemGroup.Bonus, item.ItemID, item.Description, taxMerges,
                                    salareis, bonuspaments, null);
                                //if (isLFAInBonus == true)
                                //{
                                //    double lfaAmount = 0;
                                //    //bonuspaments.Where(x => x.EmployeeID == _employee.ID && x.IsLFA == true
                                //    //        ).Sum(y => y.ChangeBonusAmount);
                                //    reAmount = reAmount - lfaAmount;

                                //    lfaExption.ThisMonthAmount = lfaExption.ProjectedAmount;
                                //    lfaExption.PreviousAmount = lfaAmount;
                                //}
                                break;
                            case EnumIncomeTaxItemGroup.Earned_Leave:
                                break;
                            case EnumIncomeTaxItemGroup.Other_Cash_Benefits:
                                reAmount = this.GetConvertedAmount(EnumIncomeTaxItemGroup.Other_Cash_Benefits, item.ItemID, item.Description, taxMerges,
                                    salareis, bonuspaments, null);
                                break;
                            case EnumIncomeTaxItemGroup.Tax_Deducted:
                                reAmount = this.GetConvertedAmount(EnumIncomeTaxItemGroup.Tax_Deducted, item.ItemID, item.Description, taxMerges,
                                    salareis, bonuspaments, EnumSalaryItemCode.Inc_Tax_Deduction);

                                reAmount = reAmount + bonuspaments.Where(x => x.EmployeeID == _employee.ID).Sum(x => x.ChangeTaxAmount);
                                break;
                            case EnumIncomeTaxItemGroup.LFA_Allowance:
                                reAmount = this.GetConvertedAmount(EnumIncomeTaxItemGroup.LFA_Allowance, item.ItemID, item.Description, taxMerges,
                                    salareis, bonuspaments, null);
                                break;
                            case EnumIncomeTaxItemGroup.WPPF_Allowance:
                                reAmount = this.GetConvertedAmount(EnumIncomeTaxItemGroup.WPPF_Allowance, item.ItemID, item.Description, taxMerges,
                                    salareis, bonuspaments, null);
                                break;
                            case EnumIncomeTaxItemGroup.Other_Allowance:
                                reAmount = this.GetConvertedAmount(EnumIncomeTaxItemGroup.Other_Allowance, item.ItemID, item.Description, taxMerges,
                                    salareis, bonuspaments, null);
                                break;
                            case EnumIncomeTaxItemGroup.TimeCard:
                                reAmount = this.GetConvertedAmount(EnumIncomeTaxItemGroup.TimeCard, item.ItemID, item.Description, taxMerges,
                                    salareis, bonuspaments, null);
                                break;
                            case EnumIncomeTaxItemGroup.Cmp_Provided_car:
                                List<ITEmpHead> cars = assignedHeads.Where(x => x.EmployeeID == _employee.ID && x.HeadID == EnumIncomeTaxHead.Car).ToList();
                                double carAmount = 0;
                                foreach (ITEmpHead car in cars)
                                {
                                    List<SalaryMonthly> empcarsalarys = salareis.Where(x => x.Employee.ID == _employee.ID).ToList();
                                    if (empcarsalarys != null)
                                    {
                                        while (GlobalFunctions.LastDateOfMonth(car.StartDate) <= GlobalFunctions.LastDateOfMonth(car.EndDate))
                                        {
                                            var carsalary = empcarsalarys.FirstOrDefault(x => x.SalaryMonth == GlobalFunctions.LastDateOfMonth(car.StartDate));
                                            if (carsalary != null)
                                            {
                                                double tempcarAmount = carsalary.Details.Where(x => x.ItemCode == EnumSalaryItemCode.Basic_Salary).Sum(y => y.ChangedAmount)
                                                        ;
                                                carAmount = carAmount + tempcarAmount;
                                            }
                                            car.StartDate = GlobalFunctions.FirstDateOfMonth(car.StartDate.AddMonths(1));
                                        }

                                    }
                                }

                                carAmount = carAmount * .05 + item.PreviousAmount;
                                if (carAmount == 0) carAmount = 0;
                                else if (carAmount < 60000) carAmount = 60000;
                                reAmount = carAmount;
                                item.PreviousAmount = 0;
                                //item.Description = "Car";
                                break;
                            default:
                                break;
                        }
                        item.PreviousAmount = item.PreviousAmount + reAmount;
                    }

                    #endregion


                    #region Calculate Annual Income & Salary Income

                    IncomeTax annualIncome = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
                        && x.ItemGroup == EnumIncomeTaxItemGroup.Annual_Income
                        && x.ItemID == (int)EnumIncomeTaxItemGroup.Annual_Income);
                    IncomeTax salaryIncome = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
                        && x.ItemGroup == EnumIncomeTaxItemGroup.Annual_Salary_Income
                        && x.ItemID == (int)EnumIncomeTaxItemGroup.Annual_Salary_Income);

                    if (annualIncome == null) annualIncome = this.Add(EnumIncomeTaxItemGroup.Annual_Income,
                                         (int)EnumIncomeTaxItemGroup.Annual_Income, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_fixed_Item);
                    if (salaryIncome == null) salaryIncome = this.Add(EnumIncomeTaxItemGroup.Annual_Salary_Income,
                                         (int)EnumIncomeTaxItemGroup.Annual_Salary_Income, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_fixed_Item);

                    if (annualIncome != null && salaryIncome != null)
                    {
                        salaryIncome.ThisMonthAmount = salaryIncome.PreviousAmount + salaryIncome.ThisMonthAmount + salaryIncome.ProjectedAmount;
                        annualIncome.ThisMonthAmount = annualIncome.PreviousAmount + annualIncome.ThisMonthAmount + annualIncome.ProjectedAmount;
                        salaryIncome.PreviousAmount = this.CurrentYearTax.Where(x => x.Side == EnumIncomeTaxSide.Inc_SalaryIncome).Sum(y => y.PreviousAmount)
                                                        - this.CurrentYearTax.Where(x => x.Side == EnumIncomeTaxSide.Dec_SalaryIncome).Sum(y => y.PreviousAmount);


                        annualIncome.PreviousAmount = salaryIncome.PreviousAmount + this.CurrentYearTax.Where(x => x.Side == EnumIncomeTaxSide.Inc_AnnualIncome).Sum(y => y.PreviousAmount)
                                                        - this.CurrentYearTax.Where(x => x.Side == EnumIncomeTaxSide.Dec_AnnualIncome).Sum(y => y.PreviousAmount);
                    }
                    #endregion

                    #region Calculate Investment
                    IncomeTax investment = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
                            && x.ItemGroup == EnumIncomeTaxItemGroup.Annual_Salary_Income
                            && x.ItemID == (int)EnumIncomeTaxItemGroup.Annual_Salary_Income);

                    double taxCredit = 0;
                    if (investment != null)
                    {
                        double investmentCanBeShown = 0;
                        if (binvestmenton == true)
                            investmentCanBeShown = ((salaryIncome.PreviousAmount * _taxParameter.MaxInvestPercent) / 100);
                        else
                            investmentCanBeShown = ((annualIncome.PreviousAmount * _taxParameter.MaxInvestPercent) / 100);

                        if (_employee.Gender == EnumGender.Male && salaryIncome.PreviousAmount <= 400000)
                        {
                            investmentCanBeShown = 0;
                        }
                        else if (_employee.Gender == EnumGender.Female && salaryIncome.PreviousAmount <= 450000)
                        {
                            investmentCanBeShown = 0;
                        }

                        if (investmentCanBeShown > _taxParameter.MaxInvAmount) investmentCanBeShown = _taxParameter.MaxInvAmount;
                        double investAmount = investmentCanBeShown;
                        if (IsmaximumInvestment == false)
                        {
                            IncomeTax ActualInvestment = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
                               && x.ItemGroup == EnumIncomeTaxItemGroup.Investment_Actual
                               && x.ItemID == (int)EnumIncomeTaxItemGroup.Investment_Actual);


                            if (ActualInvestment == null)
                                ActualInvestment = this.Add(EnumIncomeTaxItemGroup.Investment_Actual, (int)EnumIncomeTaxItemGroup.Investment_Actual, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_Info_Item);
                            IncomeTax pfItem = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
                                               && x.ItemGroup == EnumIncomeTaxItemGroup.Company_Contri_PF
                                               && x.ItemID == (int)EnumIncomeTaxItemGroup.Company_Contri_PF);

                            investAmount = 0;
                            if (pfItem != null)
                                investAmount = investAmount + (pfItem.PreviousAmount * 2);
                            double nactualInvt = 0;
                            nactualInvt = empInvestments.Where(x => x.EmployeeID == _employee.ID).Sum(y => y.Amount);
                            investAmount = investAmount + nactualInvt;

                            ActualInvestment.ThisMonthAmount = ActualInvestment.ProjectedAmount;
                            ActualInvestment.PreviousAmount = nactualInvt;
                        }

                        IncomeTax InvestmentAllowed = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
                                    && x.ItemGroup == EnumIncomeTaxItemGroup.Investment_Allowed
                                    && x.ItemID == (int)EnumIncomeTaxItemGroup.Investment_Allowed);


                        if (InvestmentAllowed == null) InvestmentAllowed = this.Add(EnumIncomeTaxItemGroup.Investment_Allowed,
                                                                (int)EnumIncomeTaxItemGroup.Investment_Allowed, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_Info_Item);

                        InvestmentAllowed.PreviousAmount = GlobalFunctions.Round(investmentCanBeShown);
                        InvestmentAllowed.ThisMonthAmount = InvestmentAllowed.ProjectedAmount;


                        if (investAmount > investmentCanBeShown)
                            investAmount = investmentCanBeShown;
                        taxCredit = (investAmount * _taxParameter.MaxInvExempPercent) / 100;

                        //if (annualIncome.PreviousAmount <= 1500000)
                        //    taxCredit = investAmount * .15;
                        //else taxCredit = investAmount * .10;

                        IncomeTax InvestmentItem = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
                                                    && x.ItemGroup == EnumIncomeTaxItemGroup.Tax_Credit_On_Investment
                                                    && x.ItemID == (int)EnumIncomeTaxItemGroup.Tax_Credit_On_Investment);

                        if (InvestmentItem == null) InvestmentItem = this.Add(EnumIncomeTaxItemGroup.Tax_Credit_On_Investment, (int)EnumIncomeTaxItemGroup.Tax_Credit_On_Investment, string.Empty, 0, 0, EnumIncomeTaxSide.Dec_GrossTax);

                        InvestmentItem.ThisMonthAmount = InvestmentItem.ProjectedAmount;
                        InvestmentItem.PreviousAmount = GlobalFunctions.Round(taxCredit);


                    }
                    #endregion

                    #region Calculate Gross Tax
                    IncomeTax GrossTax = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
                                        && x.ItemGroup == EnumIncomeTaxItemGroup.Gross_Tax
                                        && x.ItemID == (int)EnumIncomeTaxItemGroup.Gross_Tax);


                    if (GrossTax == null) GrossTax = this.Add(EnumIncomeTaxItemGroup.Gross_Tax,
                                                            (int)EnumIncomeTaxItemGroup.Gross_Tax, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_fixed_Item);
                    GrossTax.ThisMonthAmount = GrossTax.ProjectedAmount;
                    GrossTax.PreviousAmount = this.GetTaxAmount(annualIncome.PreviousAmount);


                    #endregion



                    #region Calculate net Tax
                    IncomeTax NetTax = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
                    && x.ItemGroup == EnumIncomeTaxItemGroup.Net_Payable
                    && x.ItemID == (int)EnumIncomeTaxItemGroup.Net_Payable);

                    if (NetTax == null) NetTax = this.Add(EnumIncomeTaxItemGroup.Net_Payable,
                                                            (int)EnumIncomeTaxItemGroup.Net_Payable, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_fixed_Item);


                    NetTax.ThisMonthAmount = NetTax.ProjectedAmount;
                    NetTax.PreviousAmount = GrossTax.PreviousAmount -
                        (this.CurrentYearTax.Where(x => x.ItemGroup == EnumIncomeTaxItemGroup.Tax_Gross_Rebate).Sum(x => x.ProjectedAmount)
                        + taxCredit);
                    if (GrossTax.PreviousAmount > 0 && NetTax.PreviousAmount < _taxParameter.MinTaxAmount)
                    {
                        NetTax.PreviousAmount = _taxParameter.MinTaxAmount;
                    }
                    else if (GrossTax.PreviousAmount <= 0)
                    {
                        NetTax.PreviousAmount = 0;
                    }
                    #endregion

                    IncomeTax taxdeducted = this.CurrentYearTax.FirstOrDefault(x => x.EmployeeID == _employee.ID
                                        && x.ItemGroup == EnumIncomeTaxItemGroup.Tax_Deducted
                                        && x.ItemID == (int)EnumIncomeTaxItemGroup.Tax_Deducted);

                    if (taxdeducted == null) taxdeducted = this.Add(EnumIncomeTaxItemGroup.Tax_Deducted,
                                                            (int)EnumIncomeTaxItemGroup.Tax_Deducted, string.Empty, 0, 0, EnumIncomeTaxSide.Tax_fixed_Item);

                    taxdeducted.ThisMonthAmount = taxdeducted.PreviousAmount + taxdeducted.ThisMonthAmount + taxdeducted.ProjectedAmount;
                    double taxdeductedamount = this.GetConvertedAmount(EnumIncomeTaxItemGroup.Tax_Deducted, (int)EnumIncomeTaxItemGroup.Tax_Deducted, taxdeducted.Description, taxMerges,
    salareis, bonuspaments, EnumSalaryItemCode.Inc_Tax_Deduction);

                    taxdeductedamount = taxdeductedamount + bonuspaments.Where(x => x.EmployeeID == _employee.ID).Sum(x => x.ChangeTaxAmount);
                    taxdeducted.PreviousAmount = taxdeductedamount;

                    foreach (IncomeTax ot in this.CurrentYearTax)
                    {
                        ot.EmployeeID = _employee.ID;
                        ot.TaxParameterID = nTaxParamterID;
                        empTaxCertificates.Add(ot);
                    }
                }
            }
            catch (Exception ex)
            {
                throw new ServiceException(ex.Message);
            }

            this.PaidBonues = bonuspaments;
            return empTaxCertificates;

        }

        public List<IncomeTax> MaternityLeaveCalculate(List<TaxRawItem> rawItems, CurrentUser currentUser, ref double ntaxAmount)
        {
            try
            {
                _isActualInvestment = true;
                this._onceoffAmount = rawItems[0].Amount;

                IncomeTax oIncomeTax = new IncomeTax();
                EnumIncomeTaxDataFrom datafrom = new IncomeTaxService().GetEnumForSalaryIT(_employee.ID);
                if (datafrom == EnumIncomeTaxDataFrom.SalaryITTempData)
                {
                    throw new ServiceException("Current month salary is processed and not yet finalized. Tax calculation "
                        + " is not allowed middle of this process. You have to Undo or finalize the salary to calculate tax.");
                }
                this.CurrentYearTax = new List<IncomeTax>();
                this.CurrentYearTax = new IncomeTaxService().Get(_employee.ID, EnumIncomeTaxDataFrom.ProcessTempData);

                this.CalcualteprojectMonth();
                _projectedMonth = _projectedMonth - (double)2;

                if ((_projectedMonth) < 0) _projectedMonth = 0;
                foreach (IncomeTax item in this.CurrentYearTax)
                {
                    if ((item.Side == EnumIncomeTaxSide.Inc_SalaryIncome || item.Side == EnumIncomeTaxSide.Inc_AnnualIncome)
                        && item.ThisMonthAmount > 0 && item.ProjectedAmount > 0)
                    {
                        item.ProjectedAmount = item.ThisMonthAmount * _projectedMonth;
                    }
                }

                this.UpdateRawItems(rawItems, EnumSide.Add);
                this.CmpProvidedTransport(currentUser);
                this.CalculateExamtion();
                this.CalculateBonusProjection();
                this.CalculateCPF();
                this.CalculateTotalIncome();
                this.CalculateInvestment();
                this.CalculateGrossTax();
                this.CalculateNetPayable();
                //ntaxAmount = this.CalculateDecutedAmount();

                //double totalAmount = 0;
                //IncomeTax netPayable = IncomeTax.Get(this.CurrentYearTax, _employee.ID,
                //         EnumIncomeTaxItemGroup.Net_Payable, (int)EnumIncomeTaxItemGroup.Net_Payable);
                //if (netPayable != null)
                //    totalAmount = netPayable.TotalAmount;
                //this.CalculateNetPayable();

                //netPayable = IncomeTax.Get(this.CurrentYearTax, _employee.ID,
                // EnumIncomeTaxItemGroup.Net_Payable, (int)EnumIncomeTaxItemGroup.Net_Payable);
                //if (netPayable != null)
                //    ntaxAmount = netPayable.TotalAmount - totalAmount;

                //// if the amount is equal to yearly netpayable, the amount should be dsitributed next of the projected month
                //// following if logic is required while employee taxable for this bonus amount
                //if (ntaxAmount == netPayable.TotalAmount && netPayable.TotalAmount == _taxParameter.MinTaxAmount && _projectedMonth > 0)
                //    ntaxAmount = ntaxAmount / _projectedMonth;
                ////this.CalculateNetPayable();
                double netPayable = new IncomeTaxService().Get(this.CurrentYearTax, _employee.ID,
                            EnumIncomeTaxItemGroup.Net_Payable, (int)EnumIncomeTaxItemGroup.Net_Payable).TotalAmount;
                double annualIncome = this.GetAnnualIncome();
                double grossTax = new IncomeTaxService().Get(this.CurrentYearTax, _employee.ID,
                        EnumIncomeTaxItemGroup.Gross_Tax, (int)EnumIncomeTaxItemGroup.Gross_Tax).TotalAmount;
                if (_onceoffAmount > 0)
                {
                    ntaxAmount = grossTax - this.GetTaxAmount(annualIncome - _onceoffAmount);
                    ntaxAmount = ntaxAmount - CalculateOnceOfInvestmentAmt(annualIncome - _onceoffAmount);
                }
                if (ntaxAmount < 0)
                    ntaxAmount = 0;

                IncomeTax TaxDeductitem = new IncomeTaxService().Get(this.CurrentYearTax, _employee.ID, EnumIncomeTaxItemGroup.Tax_Deducted,
                    (int)EnumIncomeTaxItemGroup.Tax_Deducted);
                if (TaxDeductitem != null)
                    TaxDeductitem.ThisMonthAmount = TaxDeductitem.ThisMonthAmount + ntaxAmount;

                return this.CurrentYearTax;
            }
            catch (ServiceException ex)
            {
                throw new ServiceException(ex.Message);
            }
            catch (Exception ex)
            {
                throw new ServiceException(ex.Message);
            }
        }
        protected void CmpProvidedTransport(CurrentUser currentUser)
        {
            try
            {
                DateTime month = (DateTime)currentUser.NextPayProcessDate;

                List<ITEmpHead> assignedHeads = new ITEmpHeadService().GetWithTaxParam((int)currentUser.TaxParamID);
                if (assignedHeads.Count == 0) return;

                List<ITEmpHead> ItemsAll = new ITEmpHeadService().Get(assignedHeads, _employee.ID);
                if (ItemsAll == null) return;
                List<ITEmpHead> Items = ItemsAll.FindAll(x => x.HeadID == EnumIncomeTaxHead.Car);
                if (Items == null) return;

                DateTime fromDate = GlobalFunctions.FirstDateOfMonth(month);
                DateTime toDate = GlobalFunctions.LastDateOfMonth(month);
                bool bvalid = false;

                double tempAmount = 0;

                foreach (ITEmpHead item in Items)
                {
                    if (item.HouseRent == 0) continue;
                    IncomeTax taxItem;
                    bvalid = false;
                    if (item.StartDate <= fromDate || item.EndDate >= fromDate) bvalid = true;
                    if (item.StartDate <= toDate || item.EndDate >= toDate) bvalid = true;
                    if (item.StartDate >= fromDate) { fromDate = item.StartDate; bvalid = true; }
                    if (item.EndDate <= toDate) { toDate = item.EndDate; bvalid = true; }

                    if (bvalid == false) continue;
                    #region Calculate Car calculation
                    if (item.HeadID == EnumIncomeTaxHead.Car)
                    {
                        taxItem = new IncomeTaxService().Get(CurrentYearTax, _employee.ID,
                                        EnumIncomeTaxItemGroup.Cmp_Provided_car,
                                            (int)EnumIncomeTaxItemGroup.Cmp_Provided_car);
                        if (taxItem == null) taxItem = this.Add(EnumIncomeTaxItemGroup.Cmp_Provided_car,
                                                            (int)EnumIncomeTaxItemGroup.Cmp_Provided_car, "Company provided car", 0, 0, EnumIncomeTaxSide.Inc_SalaryIncome);

                        taxItem.PreviousAmount = item.HouseRent * GlobalFunctions.GetFraction(item.StartDate, GlobalFunctions.LastDateOfMonth(month.AddMonths(-1)));
                        taxItem.ThisMonthAmount = item.HouseRent;
                        if (item.StartDate.Month == month.Month && item.StartDate.Year == month.Year)
                        {
                            int nDays = 30 - item.StartDate.Day + 1;
                            taxItem.ThisMonthAmount = (item.HouseRent / 30) * nDays;
                        }
                        else if (item.EndDate.Month == month.Month && item.EndDate.Year == month.Year)
                        {
                            int nDays = (item.EndDate - GlobalFunctions.FirstDateOfMonth(month)).Days + 1;
                            taxItem.ThisMonthAmount = (item.HouseRent / 30) * nDays;
                        }
                        else
                        {
                            taxItem.ThisMonthAmount = item.HouseRent * GlobalFunctions.GetFraction(fromDate, GlobalFunctions.LastDateOfMonth(month));
                        }
                        toDate = item.EndDate;
                        if (item.EndDate >= _taxParameter.FiscalyearDateTo)
                        {
                            toDate = _taxParameter.FiscalyearDateTo;
                        }
                        if (_employee.EndOfContractDate != null && _employee.EndOfContractDate < toDate)
                        {
                            toDate = Convert.ToDateTime(_employee.EndOfContractDate);
                        }

                        if (toDate == GlobalFunctions.LastDateOfMonth(toDate))
                        {
                            taxItem.ProjectedAmount = (item.HouseRent * Math.Abs((double)(((toDate.Year - month.Year) * 12) + toDate.Month - month.Month)));
                        }
                        else
                        {
                            taxItem.ProjectedAmount = (item.HouseRent * GlobalFunctions.GetFraction(GlobalFunctions.LastDateOfMonth(month).AddDays(1), toDate));
                        }

                        taxItem.ThisMonthAmount = GlobalFunctions.Round(taxItem.ThisMonthAmount);
                        taxItem.ProjectedAmount = GlobalFunctions.Round(taxItem.ProjectedAmount);

                    }
                    #endregion Calculate Car calculation

                }
            }
            catch (ServiceException ex)
            {
                throw new ServiceException(ex.Message);
            }
            catch (Exception ex)
            {
                throw new ServiceException(ex.Message);
            }

        }
    }


    public class TaxProcess
    {

        public void CalculateTax()
        {

        }

        #region ISalaryTax Members


        public void Calculate()
        {
        }

        #endregion
    }


}