using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Ease.CoreV35.Model;
using Payroll.BO;
using System.Data;
using System.Data.OleDb;
using System.IO;
using Ease.Excel;
using Ease.Excel.Reader;
using Ease.CoreV35.DataAccess;
using Payroll.BO;
using Payroll.Service.Attendence;
using System.Data.SqlClient;
using System.Configuration;

namespace Payroll.Service
{
    [Serializable]
    public class SystemDataUploadService : ServiceTemplate, ISystemDataUploadService
    {
        public SystemDataUploadService()
        { }
        
        #region Service Implementation

        public DataTable LoadData(string fileName)
        {
            return this.LoadExcelData(fileName);
            #region Old Code
            //DataTable dt = new DataTable("ImportedData");
            //try
            //{
            //    using (FileStream fs = new FileStream(fileName, FileMode.Open))
            //    {
            //        XlsReader reader = new XlsReader(fs, true);
            //        dt = reader.Data.Tables[0].Copy();                    
            //        fs.Close();                    
            //        fs.Dispose();

            //        reader = null;
            //    }
            //}
            //catch (Exception e)
            //{
            //    throw new ServiceException(e.Message, e);
            //}
            //return dt; 
            #endregion
        }

        public DataTable LoadData(string fileName, string sheetName)
        {
            return this.LoadExcelData(fileName, sheetName);

            #region Old Code
            //DataTable dt = new DataTable(sheetName);
            //try
            //{
            //    using (FileStream fs = new FileStream(fileName, FileMode.Open))
            //    {
            //        XlsReader reader = new XlsReader(fs, true);


            //        dt = reader.Data.Tables[0].Copy();
            //        fs.Close();
            //        fs.Dispose();

            //        reader = null;
            //    }
            //}
            //catch (Exception e)
            //{
            //    throw new ServiceException(e.Message, e);
            //}
            //return dt; 
            #endregion
        }

        public DataTable LoadExcelData(string fileName, string sheetName)
        {
            string connectionString = string.Empty;

            if (fileName.EndsWith("xls"))
                //Connection string for office 2003
                connectionString = string.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties=Excel 8.0;", fileName);
            else
                //Connection string for office 2007
                connectionString = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=Excel 12.0 Xml;", fileName);

            DataTable dt = new DataTable(sheetName);

            try
            {
                OleDbConnection connection = new OleDbConnection(connectionString);
                connection.Open();
                DataTable excelTable = connection.GetSchema("Tables");
                string tableName;

                if (excelTable.Rows.Count > 0)
                {
                    tableName = Convert.ToString(excelTable.Rows[0]["TABLE_NAME"]);
                    OleDbDataAdapter dataAdapter = new OleDbDataAdapter(string.Format("SELECT * FROM [{0}]", sheetName + "$"), connection);
                    //dt.TableName = sheetName;
                    dataAdapter.Fill(dt);
                    dataAdapter = null; 
                }

                connection.Close();
                connection = null;
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }

            return dt;

            
        }

        public DataTable LoadExcelData(string fileName)
        {
            string connectionString = string.Empty;
            
            if(fileName.EndsWith("xls"))
                //Connection string for office 2003
                connectionString = string.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties=Excel 8.0;", fileName);
            else
                //Connection string for office 2007
                connectionString = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=Excel 12.0 Xml;", fileName);

            DataTable dt = new DataTable();

            try
            {
                OleDbConnection connection = new OleDbConnection(connectionString);
                connection.Open();
                DataTable excelTable = connection.GetSchema("Tables");
                string tableName;

                if (excelTable.Rows.Count > 0)
                {
                    tableName = Convert.ToString(excelTable.Rows[0]["TABLE_NAME"]);
                    OleDbDataAdapter dataAdapter = new OleDbDataAdapter(string.Format("SELECT DISTINCT * FROM [{0}]", tableName), connection);
                    dt.TableName = tableName.Substring(0, tableName.Length - 1);
                    dataAdapter.Fill(dt);
                    dataAdapter = null;
                }

                connection.Close();
                connection = null;
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }

            return dt;
        }


        public void Save(ObjectsTemplate<Category> categorys, ObjectsTemplate<Grade> grades, ObjectsTemplate<Department> departments, ObjectsTemplate<Location> locations,
        ObjectsTemplate<Religion> religions, ObjectsTemplate<Designation> designations, ObjectsTemplate<Bank> banks, 
            ObjectsTemplate<Branch> branches, ObjectsTemplate<Employee> employees, ObjectsTemplate<AccessCard> oaccessCards )
        {
            TransactionContext tc = null;
            try
            {
                tc = TransactionContext.Begin(true);

                CategoryService.SaveForUpload(tc, categorys);
                GradeService.SaveForUpload(tc, grades);
                DepartmentService.SaveForUpload(tc, departments);
                LocationService.SaveForUpload(tc, locations);
                ReligionService.SaveForUpload(tc, religions);
                DesignationService.SaveForUpload(tc, designations);
                BankService.SaveForUpload(tc, banks);
                BranchService.SaveForUpload(tc, branches);
                EmployeeService.SaveForUpload(tc, employees);
                AccessCardService.SaveForExcelUpload(tc, oaccessCards);

                tc.End();

            }
            catch (Exception e)
            {
                #region Handle Exception
                if (tc != null)
                    tc.HandleError();
                ExceptionLog.Write(e);
                throw new ServiceException(e.Message, e);
                #endregion
            }

        }

        public void UpdateLocation( ObjectsTemplate<Employee> employees)
        {
            TransactionContext tc = null;
            try
            {
                tc = TransactionContext.Begin(true);
                ObjectsTemplate<Location> olocations = new ObjectsTemplate<Location>();
                int locID =50;
                Location op = Location.Get(ID.FromInteger(5));
                olocations.Add(op);
                foreach (Employee emp in employees)
                {
                    //oemployee = oemployees.Find(delegate(Employee emp) { return emp.EmployeeNo == dr["Employee No"].ToString(); });
                    Location onewloc= olocations.Find(delegate (Location item) {return item.Name == emp.Location.Name ;});
                    if (onewloc == null)
                    {
                        locID = locID + 1;
                        emp.Location.SetObjectID(locID);
                        olocations.Add(emp.Location);
                    }
                    else
                    {
                        emp.Location.SetObjectID(onewloc.ID.Integer);
                    }
                }

                LocationService.SaveForUpload(tc, olocations);
                //foreach (Employee emp in employees)
                //{
                //    MiscellaneousDA.updateLocation(tc, emp.ID, emp.Location.ID);
                //}

                tc.End();

            }

            catch (Exception e)
            {
                #region Handle Exception
                if (tc != null)
                    tc.HandleError();
                ExceptionLog.Write(e);
                throw new ServiceException(e.Message, e);
                #endregion
            }

        }

        public DataSet LoadViewData()
        {
            SqlConnection MyConn = null;
            SqlCommand com = null;
            string mySQL = "";
            SqlDataAdapter da = null;
            DataTable dt = null;
            string sConnectionString = ConfigurationSettings.AppSettings["ViewConnection"];
            //string sViews = @"vw_General,vw_SpouseWorkingBrac,vw_Academic,vw_Experience,vw_Training,vw_PublicationAward,vw_PromotionTransferHistory,vw_Punishment,vw_Organogram,vw_OrganogramPosting,vw_ChangeNodePosition";
            string sViews = ConfigurationSettings.AppSettings["Views"];
            DataSet ds = new DataSet();
            if (sViews != "")
            {
                string[] values = sViews.Split(',');
                foreach (string ss in values)
                {
                    if (ss == "vw_Organogram")
                        mySQL = "SELECT * from " + ss + " Order by Parent_Position_No,Position_No";
                    else
                        mySQL = "SELECT * from " + ss;
                    MyConn = new SqlConnection(sConnectionString);
                    com = new SqlCommand(mySQL, MyConn);
                    da = new SqlDataAdapter(com);
                    dt = new DataTable(ss);
                    try
                    {
                        da.Fill(dt);
                        ds.Tables.Add(dt);
                    }
                    catch (Exception exp) { throw new Exception("Could not read views. " + exp.Message); }
                }
            }
            return ds;
        }
        #endregion

        protected override T CreateObject<T>(Ease.CoreV35.DataAccess.DataReader dr)
        {
            throw new NotImplementedException();
        }
    }
}