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  DepartmentDA

    internal class DepartmentDA
    {
        #region  Constructor

        private DepartmentDA() { }

        #endregion

        #region  Insert function

        internal static void Insert(TransactionContext tc, Department item)
        {
            tc.ExecuteNonQuery("INSERT INTO Department(DepartmentID, code, description, parentID, parentsID, CreatedBy, CreationDate, SequenceNo, Status,TIRE,rccode)" +
            " VALUES(%n, %s, %s, %n, %s, %n, %d, %n, %n,%n,%s)", item.ID.Integer, item.Code, item.Name, DataReader.GetNullValue(item.ParentID, IDType.Integer), item.ParentsID, item.CreatedBy.Integer, item.CreatedDate, item.Sequence, item.Status, item.Tier, item.RCCode);
        }

        #endregion

        #region  Update function

        internal static void Update(TransactionContext tc, Department item)
        {
            tc.ExecuteNonQuery("UPDATE Department SET code=%s, description=%s, parentID=%n, parentsID=%s, ModifiedBy=%n, ModifiedDate=%d, SequenceNo=%n, Status=%n,TIRE=%n, rccode=%s" +
            " WHERE DepartmentID=%n", item.Code, item.Name, DataReader.GetNullValue(item.ParentID,IDType.Integer), item.ParentsID, item.ModifiedBy.Integer, item.ModifiedDate, item.Sequence, item.Status, item.Tier,item.RCCode, item.ID.Integer);
        }

        internal static void UpdateCode(TransactionContext tc, Department item, string sCode)
        {
            string sSQL = SQLParser.MakeSQL("UPDATE Department Set code = %s Where DepartmentID = %n", sCode, item.ID.Integer);
            tc.ExecuteNonQuery(sSQL);
        }

        #endregion

        #region Get Function

        internal static IDataReader Get(TransactionContext tc)
        {
            return tc.ExecuteReader("SELECT * FROM Department where status=1 Order by SequenceNo");
        }

        internal static IDataReader GetBySalaryMonthAndRCCode(TransactionContext tc, DateTime salaryMonth)
        {
            return tc.ExecuteReader("SELECT * FROM DEPARTMENT WHERE RCCode IN (SELECT  DISTINCT RCCode  FROM SALARYMONTHLY WHERE SalaryMonth=%d and PayrollTypeID =1) order by SequenceNo", salaryMonth);
        }

        internal static IDataReader Get(TransactionContext tc, string sCode)
        {
            return tc.ExecuteReader("SELECT * FROM Department WHERE Code=%s", sCode);
        }

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

        internal static IDataReader GetChild(TransactionContext tc, ID nID)
        {
            return tc.ExecuteReader("SELECT * FROM Department WHERE PARENTID=%n order by DESCRIPTION", nID.Integer);
        }

        internal static IDataReader GetParents(TransactionContext tc,EnumStatus status)
        {
            if(EnumStatus.Active==status || EnumStatus.Inactive==status)
            {
                return tc.ExecuteReader("SELECT * FROM Department Where PARENTID IS NULL and Status=%n Order by SequenceNo",status);
            }
            else
            {
                return tc.ExecuteReader("SELECT * FROM Department Where PARENTID IS NULL Order by SequenceNo");
            }
        }

        internal static IDataReader GetParentLessChilds(TransactionContext tc)
        {
            return tc.ExecuteReader("SELECT * FROM Department Where PARENTID IS NULL Order by DepartmentID");
        }

        internal static IDataReader GetByTier(TransactionContext tc, int tier, int parentid)
        {
            if (parentid == -1)
            {
                return tc.ExecuteReader("SELECT * FROM Department Where Tire=%n Order by DepartmentID", tier);
            }
            else
            {
                return tc.ExecuteReader("SELECT * FROM Department Where Tire=%n and ParentID=%n Order by DepartmentID", tier, parentid);
            }
        }

        internal static IDataReader GetByTier(TransactionContext tc, int tier)
        {
            return tc.ExecuteReader("SELECT * FROM Department Where Tire=%n Order by DepartmentID", tier);
        }

        #endregion

        #region  Delete function

        internal static void Delete(TransactionContext tc, ID nID)
        {
            tc.ExecuteNonQuery("UPDATE [Department] SET CreatedBy=%n,ModifiedBy=%n  Where DepartmentID=%n", Payroll.BO.User.CurrentUser.ID.Integer, Payroll.BO.User.CurrentUser.ID.Integer, nID.Integer);
            tc.ExecuteNonQuery("DELETE FROM [Department] WHERE DepartmentID=%n", nID.Integer);
        }
        internal static DataSet GetForTree(TransactionContext tc)
        {
            return tc.ExecuteDataSet("SELECT * FROM Department Where Tire IN(1,2) Order by Description");
        }
        #endregion

        internal static DataSet GetAllChilds(TransactionContext tc, ID parentID)
        {
            DataSet rootDataset = new DataSet();
            DataSet tempdataset = new DataSet();
            try
            {
                string query = SQLParser.MakeSQL(@"WITH cte AS 
                                                (
                                                SELECT pc.PARENTID as DeptParent, pc.* FROM DEpartment AS pc WHERE pc.PARENTID = %n
                                                UNION ALL
                                                SELECT %n as DeptParent, pc2.* FROM DEpartment pc2 JOIN cte c ON pc2.PARENTID = c.DepartmentID)
                                                SELECT * FROM CTE                                
                                                UNION
                                                SELECT dept.DEPARTMENTID as DeptParent, dept.* FROM DEpartment AS dept WHERE dept.DEPARTMENTID =%n ", parentID.Integer, parentID.Integer, parentID.Integer);

                tempdataset = tc.ExecuteDataSet(query);

                tempdataset.Tables[0].TableName = "Department";
                rootDataset.Tables.Add(tempdataset.Tables[0].Copy());
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
            return rootDataset;
        }

        internal static DataSet GetRCCodeBySalaryMonth(TransactionContext tc, DateTime salaryMonth)
        {
            DataSet rootDataset = new DataSet();
            DataSet tempdataset = new DataSet();
            try
            {
                string query = SQLParser.MakeSQL(@"SELECT DISTINCT Rccode FROM SALARYMONTHLY WHERE SalaryMonth=%d and PAYROLLTYPEID=%n", salaryMonth, SystemInformation.CurrentSysInfo.PayrollTypeID.Integer);

                tempdataset = tc.ExecuteDataSet(query);

                tempdataset.Tables[0].TableName = "Rccode";
                rootDataset.Tables.Add(tempdataset.Tables[0].Copy());
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
            return rootDataset;
        }

        internal static DataSet GetDepartmentWiseManpower(TransactionContext tc, string sParam)
        {
            DataSet rootDataset = new DataSet();
            DataSet tempdataset = new DataSet();
            try
            {
                string query = SQLParser.MakeSQL(@"SELECT d.[Code] Unit,tab1.Departmnt,tab1.Grade,tab1.Manpower FROM DEPARTMENT d,
                                                (SELECT  d.PARENTID, d.[DESCRIPTION] Departmnt,g.[Code] Grade,COUNT(Employeeid) Manpower
                                                FROM EMPLOYEE e 
                                                inner join department d on e.DepartmentID = d.DepartmentID
                                                inner join Grades g on e.GradeID = g.GradeID
                                                %q
                                                GROUP BY d.PARENTID,d.[DESCRIPTION],g.Code
                                                )tab1
                                                WHERE d.DEPARTMENTID=tab1.PARENTID", sParam);

                tempdataset = tc.ExecuteDataSet(query);

                tempdataset.Tables[0].TableName = "Manpower";
                rootDataset.Tables.Add(tempdataset.Tables[0].Copy());
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
            return rootDataset;
        }
    }

    #endregion
}