using System;
using Payroll.BO;
using System.Data;
using System.Linq;
using Ease.CoreV35.Model;
using System.Data.SqlClient;
using Ease.CoreV35.DataAccess;
using System.Collections.Generic;
using Ease.CoreV35.DataAccess.SQL;

namespace Payroll.Service
{
    #region  EmployeeHistoryDA

    internal class EmployeeHistoryDA
    {
        #region  Constructor

        private EmployeeHistoryDA() { }

        #endregion

        #region  Insert function

        internal static void Insert(TransactionContext tc, EmployeeHistory item)
        { 
            tc.ExecuteNonQuery("INSERT INTO EmployeeHistory(ID, employeeID, effectDate, endDate, paramID, remarks, CreatedBy, CreationDate)" +
            " VALUES(%n, %n, %d, %d, %n, %s, %n, %d)", item.ID.Integer, item.EmployeeID.Integer, item.EffectDate, DataReader.GetNullValue(item.EndDate), item.EmployeeStatus, item.Remarks, item.CreatedBy.Integer, item.CreatedDate);
        }

        #endregion

        #region  Update function

        internal static void Update(TransactionContext tc, EmployeeHistory item)
        {
            tc.ExecuteNonQuery("UPDATE EmployeeHistory SET employeeID=%n, effectDate=%d, endDate=%d, paramID=%n, remarks=%s, ModifiedBy=%n, ModifiedDate=%d" +
            " WHERE ID=%n", item.EmployeeID.Integer, item.EffectDate, DataReader.GetNullValue(item.EndDate), item.EmployeeStatus, item.Remarks, item.ModifiedBy.Integer, item.ModifiedDate, item.ID.Integer);
        }

        #endregion

        #region Get Function

        internal static IDataReader Get(TransactionContext tc)
        {
            return tc.ExecuteReader("SELECT * FROM EmployeeHistory");

        }

        internal static IDataReader Get(TransactionContext tc, ID nID)
        {
            return tc.ExecuteReader("SELECT * FROM EmployeeHistory WHERE ID=%n", nID.Integer);
        }

        internal static IDataReader GetByEmpID(TransactionContext tc, ID nEmpID)
        {
            return tc.ExecuteReader("SELECT * FROM EmployeeHistory WHERE EmployeeID=%n", nEmpID.Integer);
        }
        internal static IDataReader GetEmpLastHistory(TransactionContext tc, ID nEmpID)
        {
            return tc.ExecuteReader("SELECT * FROM EmployeeHistory WHERE EmployeeID=%n and effectDate=(select max(effectDate) FROM EmployeeHistory WHERE EmployeeID=%n)", nEmpID.Integer, nEmpID.Integer);
        }
        internal static DateTime GetByEmpIDandParam(TransactionContext tc, int nEmpID, EnumEmployeeStatus ParamID)
        {
            DateTime nDate = DateTime.MinValue;
            object obj = tc.ExecuteScalar("Select max(EffectDate) EffectDate FROM EmployeeHistory WHERE EmployeeID=%n   AND ParamID=%n group by employeeid ", nEmpID, ParamID);
            if (obj != null)
            {
                nDate = Convert.ToDateTime(obj);
            }
            else
            {
                nDate = DateTime.MinValue;
            }
            return nDate;
            
        }

        internal static DataSet GetEmpHistory(TransactionContext tc, DateTime dEffectDate, DateTime dEffectDate2, int payrollTypeID)
        {
            DataSet oEmpHistories = new DataSet();
            try
            {
                //oEmpHistories = tc.ExecuteDataSet("Select Emp.EMPLOYEENO,Emp.NAME,Deg.NAME AS DESIGNATION,G.DESCRIPTION as Grade,"
                //                                     + " Emp.JOININGDATE,Emp.ENDOFCONTRACTDATE,EH.EFFECTDATE,EH.REMARKS as Comments,US.LoginID as CommitedBy,EH.CreationDate,EH.ParamID"
                //                                     + " from EMPLOYEEHISTORY as EH,EMPLOYEE as Emp ,USERS as US,DESIGNATION as Deg,GRADES as G"
                //                                     + " WHERE Emp.DESIGNATIONID=Deg.DESIGNATIONID"
                //                                     + " AND Emp.GRADEID=G.GRADEID"
                //                                     + " AND US.USERID=EH.CreatedBy"
                //                                     + " AND Emp.ENDOFCONTRACTDATE between %d and %d"
                //                                     + " AND Emp.EmpHistoryID =EH.ID AND Emp.EMPLOYEEID=EH.EMPLOYEEID AND Emp.PayrollTypeID=%n order by Emp.EMPLOYEENO",
                //                                     GlobalFunctions.FirstDateOfMonth(dEffectDate), GlobalFunctions.LastDateOfMonth(dEffectDate),
                //                                     SystemInformation.CurrentSysInfo.PayrollTypeID.Integer);

                oEmpHistories = tc.ExecuteDataSet("Select Emp.Employeeid,eh.emplifecycleid,Eh.status, Emp.EMPLOYEENO,Emp.NAME,Deg.NAME AS DESIGNATION,G.DESCRIPTION as Grade, Emp.JOININGDATE,"
                                                    +" Emp.ENDOFCONTRACTDATE,EH.EFFECTDATE,EH.REMARKS as Comments,US.LoginID as CommitedBy,EH.CreationDate"
                                                    +" from EmpLifeCycle as EH,EMPLOYEE as Emp ,USERS as US,DESIGNATION as Deg,GRADES as G "
                                                    +" WHERE Emp.DESIGNATIONID=Deg.DESIGNATIONID AND Emp.GRADEID=G.GRADEID AND US.USERID=EH.CreatedBy AND "
                                                    +" Emp.ENDOFCONTRACTDATE between %d and %d AND  eh.isdiscontinue=1 AND"
                                                    +" Emp.EMPLOYEEID=EH.EMPLOYEEID AND Emp.PayrollTypeID=%n order by Emp.EMPLOYEENO",
                                                    dEffectDate, dEffectDate2,
                                                    payrollTypeID);


            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
            return oEmpHistories;
        }
        
        #endregion

        #region  Delete function

        internal static void Delete(TransactionContext tc, ID nID)
        {
            tc.ExecuteNonQuery("DELETE FROM [EmployeeHistory] WHERE ID=%n", nID);
        }

        internal static void DeleteByEmpID(TransactionContext tc, ID nEmpID)
        {
            tc.ExecuteNonQuery("DELETE FROM [EmployeeHistory] WHERE EMPLOYEEID=%n", nEmpID.Integer);
        }
        #endregion
    }

    #endregion
}