using Ease.Core;
using Ease.Core.DataAccess;
using Ease.Core.Model;
using Ease.Core.Utility;
using HRM.BO;
using HRM.BO.Configuration;
using Microsoft.Extensions.Configuration;
using NPOI.SS.Formula.Eval;
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using static iTextSharp.text.pdf.AcroFields;

namespace HRM.DA
{
    public class ShortLeaveService : ServiceTemplate , IShortLeaveService
    {
        #region Private functions and declaration

        protected override T CreateObject<T>(DataReader oReader)
        {
            ShortLeave oShortLeave = new ShortLeave();
            MapObject(oShortLeave, oReader);
            return oShortLeave as T;
        }

        private void MapObject(ShortLeave oShortLeave, DataReader oReader)
        {
            base.SetObjectID(oShortLeave, oReader.GetInt32("ShortLeaveId").Value);
            oShortLeave.TelephoneNo = oReader.GetString("TelephoneNo");
            oShortLeave.ALTEMPID = oReader.GetString("ALTEMPID");
            oShortLeave.EntryDate = oReader.GetDateTime("EntryDate").Value;
            oShortLeave.TotalHour = oReader.GetDouble("TotalHour").Value;
            oShortLeave.DepartureTime = oReader.GetTime("DepartureTime").Value;
            oShortLeave.DepartureEntryByID = oReader.GetInt32("DepartureEntryByID", true, 0);
            oShortLeave.ReturnTime = oReader.GetTime("ReturnTime", true, TimeSpan.FromMinutes(0));
            oShortLeave.ReturnEntryByID = oReader.GetInt32("ReturnEntryByID", true, 0);
            oShortLeave.ActualInTime = oReader.GetTime("ActualInTime", true, TimeSpan.FromMinutes(0));
            oShortLeave.ActualOutTime = oReader.GetTime("ActualOutTime", true, TimeSpan.FromMinutes(0));
            oShortLeave.ExpectedReturnTime = oReader.GetTime("ExpectedReturnTime", true, TimeSpan.FromMinutes(0));
            oShortLeave.GatePassStatus = (EnumGatePassStatus)oReader.GetInt32("GatePassStatus").Value;
            oShortLeave.LineManagerID = oReader.GetInt32("LineManagerID").Value;
            oShortLeave.ApprovedBy = oReader.GetInt32("ApprovedBy", true, 0);
            oShortLeave.ApprovedDate = oReader.GetDateTime("ApprovedDate").Value;
            oShortLeave.EmployeeID = oReader.GetInt32("EmployeeID").Value;
            oShortLeave.PayrollTypeID = oReader.GetInt32("PayrollTypeID").Value;
            oShortLeave.Remarks = oReader.GetString("Remarks");
            oShortLeave.PlaceOfVisit = oReader.GetString("PlaceOfVisit");
            oShortLeave.PurposeOfVisit = oReader.GetString("PurposeOfVisit");
        }

        private ShortLeave CreateObject(DataReader oReader)
        {
            ShortLeave oShortLeave = new ShortLeave();
            MapObject(oShortLeave, oReader);
            return oShortLeave;
        }


        #endregion

        #region Service implementation


        #region Get Functions
        public ShortLeave Get(int id)
        {
            ShortLeave oShortLeave = new ShortLeave();

            TransactionContext tc = null;
            try
            {
                tc = TransactionContext.Begin();
                DataReader oreader = new DataReader(ShortLeaveDA.Get(tc, id));
                if (oreader.Read())
                {
                    oShortLeave = this.CreateObject<ShortLeave>(oreader);
                }

                oreader.Close();
                tc.End();
            }
            catch (Exception e)
            {
                #region Handle Exception

                if (tc != null)
                    tc.HandleError();
                ExceptionLog.Write(e);
                throw new ServiceException("Failed to Get Short Leave", e);

                #endregion
            }

            return oShortLeave;
        }

        public ShortLeave GetByDate(int id, DateTime date)
        {
            ShortLeave oShortLeave = new ShortLeave();

            TransactionContext tc = null;
            try
            {
                tc = TransactionContext.Begin();
                DataReader oreader = new DataReader(ShortLeaveDA.GetByDate(tc, id, date));
                if (oreader.Read())
                {
                    oShortLeave = this.CreateObject<ShortLeave>(oreader);
                }

                oreader.Close();
                tc.End();
            }
            catch (Exception e)
            {
                #region Handle Exception

                if (tc != null)
                    tc.HandleError();
                ExceptionLog.Write(e);
                throw new ServiceException("Failed to Get Short Leave", e);

                #endregion
            }

            return oShortLeave;
        }
        public List<ShortLeave> GetListByDate(int id, DateTime date)
        {
            List<ShortLeave> oShortLeaves = new List<ShortLeave>();

            TransactionContext tc = null;
            try
            {
                tc = TransactionContext.Begin();
                DataReader oreader = new DataReader(ShortLeaveDA.GetByDate(tc, id, date));
                    oShortLeaves = this.CreateObjects<ShortLeave>(oreader);

                oreader.Close();
                tc.End();
            }
            catch (Exception e)
            {
                #region Handle Exception

                if (tc != null)
                    tc.HandleError();
                ExceptionLog.Write(e);
                throw new ServiceException("Failed to Get Short Leave", e);

                #endregion
            }

            return oShortLeaves;
        }

        public DataTable Get(int empid, int payrollTypeID, EnumGatePassStatus status, DateTime fromDate, DateTime toDate)
        {
            TransactionContext tc = null;
            DataTable dt = null;
            try
            {
                tc = TransactionContext.Begin();
                //fromDate = fromDate.FirstDateOfMonth();
                //toDate = toDate.LastDateOfMonth();
                dt = ShortLeaveDA.Get(tc, empid, payrollTypeID, status, fromDate, toDate);
                tc.End();
            }
            catch (Exception e)
            {
                #region Handle Exception
                if (tc != null)
                    tc.HandleError();
                ExceptionLog.Write(e);
                throw new ServiceException("Failed to Get Short Leave Information" + e.Message, e);
                #endregion
            }

            return dt;
        }
        public DataTable GetAppliedSortLeave(int lmId, EnumGatePassStatus status)
        {
            TransactionContext tc = null;
            DataTable dt = null;
            try
            {
                tc = TransactionContext.Begin();
                dt = ShortLeaveDA.GetAppliedSortLeave(tc, lmId, status);
                tc.End();
            }
            catch (Exception e)
            {
                #region Handle Exception
                if (tc != null)
                    tc.HandleError();
                ExceptionLog.Write(e);
                throw new ServiceException("Failed to Get Applied Short Leave Data" + e.Message, e);
                #endregion
            }

            return dt;
        }

        public DataTable GetApprovedShortLeave(int lmId, EnumGatePassStatus status, DateTime fromDate, DateTime toDate)
        {
            TransactionContext tc = null;
            DataTable dt = null;
            try
            {
                tc = TransactionContext.Begin();
                dt = ShortLeaveDA.GetApprovedShortLeave(tc, lmId, status, fromDate, toDate);
                tc.End();
            }
            catch (Exception e)
            {
                #region Handle Exception
                if (tc != null)
                    tc.HandleError();
                ExceptionLog.Write(e);
                throw new ServiceException("Failed to Get Applied Short Leave Data" + e.Message, e);
                #endregion
            }

            return dt;
        }
        public void ApproveOrRejectShortLeave(int shortLeaveid, EnumGatePassStatus status, int approver)
        {
            TransactionContext tc = null;
            try 
            { 
                tc = TransactionContext.Begin();
                ShortLeaveDA.ApproveOrRejectShortLeave(tc, shortLeaveid, status, approver);
                tc.End();
            }
            catch (Exception e)
            {
                #region Handle Exception

                if (tc != null)
                    tc.HandleError();
                ExceptionLog.Write(e);
                throw new Exception("Failed to Approve Or Reject Short Leave. Because " + e.Message, e);

                #endregion
            }
        }

        public void ApproveMultipleShortLeave (string shortLeaveid, EnumGatePassStatus status, int approver)
        {
            TransactionContext tc = null;
            try
            {
                tc = TransactionContext.Begin();
                ShortLeaveDA.ApproveMultipleShortLeave(tc, shortLeaveid, status, approver);
                tc.End();
            }
            catch (Exception e)
            {
                #region Handle Exception

                if (tc != null)
                    tc.HandleError();
                ExceptionLog.Write(e);
                throw new Exception("Failed to Approve Or Reject Short Leave. Because " + e.Message, e);

                #endregion
            }
        }
        public DataTable getGatemanShortLeave(EnumGatePassStatus status, DateTime fromDate, DateTime toDate)
        {
            TransactionContext tc = null;
            DataTable dt = null;
            try
            {
                tc = TransactionContext.Begin();
                //fromDate = fromDate.FirstDateOfMonth();
                //toDate = toDate.LastDateOfMonth();
                dt = ShortLeaveDA.getGatemanShortLeave(tc, status, fromDate, toDate);
                tc.End();
            }
            catch (Exception e)
            {
                #region Handle Exception
                if (tc != null)
                    tc.HandleError();
                ExceptionLog.Write(e);
                throw new ServiceException("Failed to Get Short Leave Information" + e.Message, e);
                #endregion
            }

            return dt;
        }
        #endregion


        #region Save
        public int Save(ShortLeave oShortLeave)
        {
            TransactionContext tc = null;
            try
            {
                if (oShortLeave == null)
                {
                    oShortLeave = new ShortLeaveService().Get(oShortLeave.ID);
                }

                if (oShortLeave.Employee == null)
                {
                    oShortLeave.Employee = new EmployeeService().Get(oShortLeave.EmployeeID);
                }

                List<ShortLeave> oSL = new List<ShortLeave>();

                int currentoShortLeaveID = oShortLeave.ID;

                oSL = this.GetListByDate(oShortLeave.EmployeeID, oShortLeave.EntryDate);

                oSL = oSL.Where(x => x.GatePassStatus != EnumGatePassStatus.Rejected //&& x.GatePassStatus != EnumGatePassStatus.Approved
                                                 && x.ID != currentoShortLeaveID).ToList();

                if (oSL.Count>0)
                {
                    throw new Exception("Overlaps with previously applied Short leaves.");
                }
                else
                {
                    tc = TransactionContext.Begin(true);
                    Save(oShortLeave, tc);
                    tc.End();
                }


                //if (isNew == true && oShortLeave.GatePassStatus == EnumGatePassStatus.Applied)
                //{
                //    string subject = oShortLeave.Employee.EmployeeNo + "-" + oShortLeave.Employee.Name + ",  has applied " + oShortLeave.PurposeOfVisit + " Short Leave on "
                //                    + oShortLeave.EntryDate.ToString("dd MMM yyyy")
                //                    + " at " + oShortLeave.EntryDate.Add(oShortLeave.DepartureTime).ToString("hh:mm tt")
                //                    //" to " + oShortLeave.AppliedToDate.ToString("dd MMM yyyy") +
                //                    //" days:" + oShortLeave.AppliedTotalDays.ToString() 
                //                    + ". Your Approval is required";
                //    WFManager<IworkflowInterface> om = new WFManager<IworkflowInterface>(oShortLeave);
                //    om.InitiateProcess(tc, oShortLeave.EmployeeID, oShortLeave.SetupID, oShortLeave.ID, "", subject);
                //}
                //else
                //{
                //    tc = TransactionContext.Begin(true);

                //    if (oShortLeave.IsNew)
                //    {
                //        int id = tc.GenerateID("ShortLeave", "ShortLeaveID");
                //        base.SetObjectID(oShortLeave, id);
                //        ShortLeaveDA.Insert(tc, oShortLeave);
                //    }
                //    else
                //    {
                //        ShortLeaveDA.Update(tc, oShortLeave);
                //    }

                //    tc.End();
                //}

                //else if (oLeaveEntry.LeaveStatus == EnumLeaveStatus.Approved)
                //{
                //    new DailyAttnProcessService().UpdateLeave(tc, oLeaveEntry.EmpID, oLeaveEntry.LeaveID, oLeaveEntry.CreatedBy, oLeaveEntry.ApprovedFromDate, oLeaveEntry.ApprovedToDate);

                //}
                return oShortLeave.ID;
            }
            catch (Exception e)
            {
                #region Handle Exception

                if (tc != null)
                    tc.HandleError();
                ExceptionLog.Write(e);
                throw new Exception("Failed to Apply Short Leave. Because " + e.Message, e);

                #endregion
            }
        }
        public int Save(ShortLeave oShortLeave, TransactionContext tc)
        {
            try
            {
                bool isNew = oShortLeave.IsNew;

                if (oShortLeave.IsNew)
                {
                    int id = tc.GenerateID("ShortLeave", "ShortLeaveID");
                    base.SetObjectID(oShortLeave, id);
                    ShortLeaveDA.Insert(tc, oShortLeave);
                }
                else
                {
                    ShortLeaveDA.Update(tc, oShortLeave);
                }

                if (isNew == true && oShortLeave.GatePassStatus == EnumGatePassStatus.Applied)
                {
                    SendMail(oShortLeave);

                }
                //if (isNew == true && oShortLeave.GatePassStatus == EnumGatePassStatus.Applied)
                //{
                //    string subject = oShortLeave.Employee.EmployeeNo + "-" + oShortLeave.Employee.Name + ",  has applied " + oShortLeave.PurposeOfVisit + " Shortleave  at " 

                //                    + oShortLeave.EntryDate.ToString("dd MMM yyyy")

                //                    + ". Your Approval is required";
                //    WFManager<IworkflowInterface> om = new WFManager<IworkflowInterface>(oShortLeave);
                //    om.InitiateProcess(tc, oShortLeave.EmployeeID, oLeaveEntry.SetupID, oShortLeave.ID, "", subject);
                //}

                //else if (oLeaveEntry.LeaveStatus == EnumLeaveStatus.Approved)
                //{

                //}
                return oShortLeave.ID;
            }
            catch (Exception e)
            {
                #region Handle Exception

                if (tc != null)
                    tc.HandleError();
                ExceptionLog.Write(e);
                throw new ServiceException(e.Message, e);

                #endregion
            }
        }
        public void UpdateInAndOutTime(ShortLeave oShortleave, Employee oEmp)
        {
            TransactionContext tc = null;
            try
            {
                ShortLeave oSL = new ShortLeaveService().Get(oShortleave.ID);
                if(oShortleave.EntryDate != DateTime.Now.Date)
                {
                    throw new Exception("Incorrect Entry: Select employee applied today.");
                }

                if (oShortleave.ActualOutTime >= oSL.ActualOutTime && oSL.ActualOutTime != TimeSpan.FromMinutes(0) 
                    && oShortleave.ActualInTime == TimeSpan.FromMinutes(0) )
                {
                    throw new Exception("The Departure Entry is Already recorded.");
                }
                if (oShortleave.ActualInTime >= oSL.ActualInTime && oSL.ActualInTime != TimeSpan.FromMinutes(0) )
                {
                    throw new Exception("The Return Entry is Already recorded.");
                }
                tc = TransactionContext.Begin(true);
                ShortLeaveDA.UpdateInAndOutTime(tc, oShortleave, oEmp);
                tc.End();


            }
            catch (Exception e)
            {
                #region Handle Exception

                if (tc != null)
                    tc.HandleError();
                ExceptionLog.Write(e);
                throw new ServiceException(e.Message, e);

                #endregion
            }
        }

        #endregion


        #region Delete
        public void Delete(int id)
        {
            TransactionContext tc = null;
            try
            {
                tc = TransactionContext.Begin(true);
                ShortLeaveDA.Delete(tc, id);
                tc.End();
            }
            catch (Exception e)
            {
                #region Handle Exception

                if (tc != null)
                    tc.HandleError();
                ExceptionLog.Write(e);
                throw new ServiceException(e.Message, e);

                #endregion
            }
        }



        #endregion

        #endregion


        #region private methods

        private void SendMail(ShortLeave shortLeave)
        {

            try
            {

                //string Name = shortLeave.Employee.EmployeeNo + "-" + shortLeave.Employee.Name;

                Employee lm = new EmployeeService().Get(shortLeave.LineManagerID);
                string Name = lm.Name;
                string Email = lm.EmailAddress;



                var builder = new ConfigurationBuilder().SetBasePath(Directory.GetCurrentDirectory()).AddJsonFile("appsettings.json");
                EmailSettings emailSettings = new EmailSettings();
                IConfiguration Configuration = builder.Build();
                Configuration.GetSection("EmailSettings").Bind(emailSettings);

                MailSender mailSender = new MailSender();
                mailSender.AddTo(Email)
;

                mailSender.Subject = "Notification of Short Leave request (" + DateTime.Now.ToString("dd MMM yyyy") + ")";

                mailSender.Body = $@"<p>Dear {Name},</p>
                                        <p>A Short Leave request has been submitted for Employee ID-{shortLeave.Employee.EmployeeNo}</p>
                                        <p>Your Approval is required.</p>
                                        <p>Thanks {Name}</p>";
                                        //<p>Regards,</p>
                                        //<p>{shortLeave.Employee.Name}</p>";

                mailSender.ThreadSendMail(emailSettings);

            }
            catch (Exception ex)
            {
                //throw new ServiceException(ex.Message);
                //                throw new CustomException(EnumExceptionType.Informational, "Successfully submitted but system could not send E-mail. You do not need to submit it again.");
            }
        }


        #endregion
    }
}