using Ease.Core.DataAccess;
using System;
using System.Data;
using HRM.BO;
using iTextSharp.text.pdf.security;

namespace HRM.DA
{
    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, item.EmployeeID, item.EffectDate,
                DataReader.GetNullValue(item.EndDate), item.EmployeeStatus, item.Remarks, item.CreatedBy,
                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, item.EffectDate, DataReader.GetNullValue(item.EndDate),
                item.EmployeeStatus, item.Remarks, item.ModifiedBy, item.ModifiedDate, item.ID);
        }

        #endregion

        #region Get Function

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

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

        internal static IDataReader GetByEmpID(TransactionContext tc, int nEmpID)
        {
            return tc.ExecuteReader("SELECT * FROM EmployeeHistory WHERE EmployeeID=%n", nEmpID);
        }

        internal static IDataReader GetEmpLastHistory(TransactionContext tc, int nEmpID)
        {
            return tc.ExecuteReader(
                "SELECT * FROM EmployeeHistory WHERE EmployeeID=%n and effectDate=(select max(effectDate) FROM EmployeeHistory WHERE EmployeeID=%n)",
                nEmpID, nEmpID);
        }

        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 DESIGNATION,G.DESCRIPTION Grade,"
                //                                     + " Emp.JOININGDATE,Emp.ENDOFCONTRACTDATE,EH.EFFECTDATE,EH.REMARKS Comments,US.LoginID CommitedBy,EH.CreationDate,EH.ParamID"
                //                                     + " from EMPLOYEEHISTORY EH,EMPLOYEE Emp ,USERS US,DESIGNATION Deg,GRADES 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",
                //                                     PayrollGlobalFunctions.PayrollFirstDateOfMonth(dEffectDate), PayrollGlobalFunctions.PayrollLastDateOfMonth(dEffectDate),
                //                                     SystemInformation.CurrentSysInfo.PayrollTypeID);

                string sql = SQLParser.MakeSQL(
                    "Select Emp.Employeeid,eh.emplifecycleid,Eh.status, Emp.EMPLOYEENO,Emp.NAME,Deg.NAME DESIGNATION,G.DESCRIPTION Grade, Emp.JOININGDATE,"
                    + " Emp.ENDOFCONTRACTDATE,EH.EFFECTDATE,EH.REMARKS Comments,US.LoginID CommitedBy,EH.CreationDate"
                    + " from EmpLifeCycle EH,EMPLOYEE Emp ,USERS US,DESIGNATION Deg,GRADES 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);

                oEmpHistories = tc.ExecuteDataSet(sql);
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }

            return oEmpHistories;
        }

        #endregion

        #region Delete function

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

        internal static void DeleteByEmpID(TransactionContext tc, int nEmpID)
        {
            tc.ExecuteNonQuery("DELETE FROM EmployeeHistory WHERE EMPLOYEEID=%n", nEmpID);
        }

        #endregion
    }
}