using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Ease.CoreV35.DataAccess;
using System.Data;
using HRM.BO;
using Ease.Core.DataAccess;

namespace HRM.DA
{
    #region HolidayCalendarDA

    internal class HolidayCalendarDA
    {
        #region Constructor

        private HolidayCalendarDA()
        {
        }

        #endregion

        #region Insert function

        internal static void Insert(TransactionContext tc, HolidayCalendar item)
        {
            tc.ExecuteNonQuery(
                "INSERT INTO HolidayCalendar(HolidayCalendarID, Type, Description, HolidayDate, LocationID, WeeklyHolidayType, CreatedBy, CreatedDate)" +
                " VALUES(%n, %n, %s, %d, %n, %n, %n, %d)", item.ID, item.Type, item.Description, item.HolidayDate,
                item.LocationID, DataReader.GetNullValue(item.WeeklyHolidayType),
                item.CreatedBy, item.CreatedDate);
        }

        #endregion

        internal static IDataReader GetByDate(TransactionContext tc, DateTime dDate)
        {
            return tc.ExecuteReader("SELECT * FROM HolidayCalendar WHERE HolidayDate=%d", dDate);
        }
        #region Update function

        internal static void Update(TransactionContext tc, HolidayCalendar item)
        {
            tc.ExecuteNonQuery(
                "UPDATE HolidayCalendar SET Type=%n, Description=%s, HolidayDate=%d, LocationID=%n, WeeklyHolidayType=%n, ModifiedBy=%n, ModifiedDate=%d" +
                " WHERE HolidayCalendarID=%n", item.Type, item.Description, item.HolidayDate,
                item.LocationID, DataReader.GetNullValue(item.WeeklyHolidayType),
                item.ModifiedBy, item.ModifiedDate, item.ID);
        }

        #endregion

        #region Get Function

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

        internal static IDataReader GetWeeklyHoliDay(TransactionContext tc)
        {
            return tc.ExecuteReader("SELECT * FROM holidaycalendar WHERE locationid IS NULL");
        }

        internal static IDataReader GetHoliDayByLocation(TransactionContext tc, int nLocID)
        {
            return tc.ExecuteReader("SELECT * FROM holidaycalendar WHERE type=2 OR locationid=%n", nLocID);
        }

        internal static IDataReader GetWeeklyAndLocHoliday(TransactionContext tc, int? nLocID)
        {
            if (nLocID != null)
            {
                return tc.ExecuteReader(@"WITH cte AS(
SELECT createdby,createddate,holidaycalendarid,description,holidaydate,TYPE,locationid,modifiedby,modifieddate,weeklyholidaytype
,row_number()over(PARTITION BY HolidayDate ORDER BY TYPE) AS sn 
FROM holidaycalendar
	WHERE locationid=%n Or Type in(1,2) )
SELECT * FROM cte WHERE sn = 1", nLocID);
                //return tc.ExecuteReader("SELECT * FROM holidaycalendar WHERE type=2 OR locationid=%n", nLocID);
            }
            else
            {
                return tc.ExecuteReader("SELECT * FROM holidaycalendar WHERE type=2 OR (locationid is null)");
            }
            //return tc.ExecuteReader("SELECT * FROM holidaycalendar WHERE locationid IS NULL OR type=2 OR locationid=%n", nLocID);
        }

        internal static IDataReader GetHoliDays(TransactionContext tc, int nLocID)
        {
            string sql = string.Empty;
            if (nLocID > 0)
            {
                // Gets the All Holidays(national and location wise weekly). Take only 1 input for overlapping/same days
                sql = SQLParser.MakeSQL(@"WITH cte AS(
                                        SELECT createdby,createddate,holidaycalendarid,description,holidaydate,TYPE,locationid,modifiedby,modifieddate,weeklyholidaytype
                                        ,row_number()over(PARTITION BY HolidayDate ORDER BY TYPE) AS sn 
                                        FROM holidaycalendar
	                                        WHERE locationid=%n OR TYPE = 2)
                                        SELECT * FROM cte WHERE sn = 1", nLocID);
                return tc.ExecuteReader(sql);
            }
            else
            {
                // Gets the All Holidays(national and entire company Weekly). Take only 1 input for overlapping/same days
                sql = SQLParser.MakeSQL("SELECT * FROM holidaycalendar WHERE locationid is null");
            }

            return tc.ExecuteReader(sql);
        }

        internal static IDataReader GetNationalHolidays(TransactionContext tc)
        {
            string sql = string.Empty;
            sql = SQLParser.MakeSQL(@"WITH cte AS(
                                        SELECT createdby,createddate,holidaycalendarid,description,holidaydate,TYPE,locationid,modifiedby,modifieddate,weeklyholidaytype
                                        ,row_number()over(PARTITION BY HolidayDate ORDER BY TYPE) AS sn 
                                        FROM holidaycalendar
	                                        WHERE TYPE = 2)
                                        SELECT * FROM cte WHERE sn = 1");

            return tc.ExecuteReader(sql);
        }

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

        internal static int GetTotalMonthlyHolidays(TransactionContext tc, DateTime firstDateOfMonth, DateTime lastDateOfMonth)
        {
            int totalMonthlyHolidays = 0;
            object holidays = tc.ExecuteScalar("SELECT Count(*) FROM HolidayCalendar WHERE HoliDayDate BETWEEN %d AND %d", firstDateOfMonth, lastDateOfMonth);
            if (holidays != DBNull.Value)
            {
                totalMonthlyHolidays = Convert.ToInt32(holidays);
            }
            return totalMonthlyHolidays;
        }

        internal static int GetTotalMonthlyHolidays(TransactionContext tc, int loactionNumber,
            DateTime firstDateOfMonth, DateTime lastDateOfMonth)
        {
            int totalMonthlyHolidays = 0;
            object holidays =
                tc.ExecuteScalar(
                    "SELECT Count(*) FROM HolidayCalendar WHERE HoliDayDate >= %d AND HoliDayDate <= %d AND LocationID=%n",
                    firstDateOfMonth, lastDateOfMonth, loactionNumber);
            if (holidays != DBNull.Value)
            {
                totalMonthlyHolidays = Convert.ToInt32(holidays);
            }

            return totalMonthlyHolidays;
        }

        public static double GetNoofHoliday(TransactionContext tc)
        {
            object ob;
            ob = tc.ExecuteScalar("SELECT COUNT(HolidayCalendarID) FROM HolidayCalendar");
            return ob == DBNull.Value ? 0 : Convert.ToDouble(ob);
        }

        public static IDataReader GetbyMonthRange(TransactionContext tc, int nLocationID, DateTime dStartDate,
            DateTime dEndDate)
        {
            return tc.ExecuteReader(
                "Select * from HolidayCalendar where LocationID=%n AND HolidayDate between %d and %d order by HolidayDate",
                nLocationID, dStartDate, dEndDate);
            //Old Query
            //return tc.ExecuteReader("Select * from HolidayCalendar where LocationID is null OR LocationID=%n AND HolidayDate between %d and %d order by HolidayDate" , nLocationID , dStartDate , dEndDate);
        }

        public static IDataReader GetbyDateRange(TransactionContext tc, DateTime dStartDate, DateTime dEndDate)
        {
            return tc.ExecuteReader(
                "Select * from HolidayCalendar where HolidayDate between %d and %d order by HolidayDate", dStartDate,
                dEndDate);
        }

        #endregion

        #region Delete function

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

        internal static void DeleteAll(TransactionContext tc)
        {
            tc.ExecuteNonQuery("DELETE FROM HolidayCalendar");
        }

        internal static void DeleteAll(TransactionContext tc, int nYear)
        {
            //tc.ExecuteNonQuery("DELETE FROM HolidayCalendar where EXTRACT(YEAR FROM HolidayDate)=%n", nYear); // This is for oracle
            tc.ExecuteNonQuery("DELETE FROM [HolidayCalendar] where Year(HolidayDate)=%n", nYear);
        }

        #endregion
    }

    #endregion
}