using System;
using System.Collections.Generic;
using System.Text;
using System.Data.SqlClient;
using Tanshu.Accounts.Contracts;
using Tanshu.Data.DAO;
using Tanshu.Accounts.DAOFactory;

namespace Tanshu.Accounts.SqlDAO
{
    public class VoucherDAO : BaseDAO, IVoucherDAO
    {
        public VoucherDAO(IConnectionDAO connection)
            : base(connection)
        { }

        public bool Insert(VoucherBO voucher)
        {
            using (SqlCommand cmd = new SqlCommand(@"
	SELECT @Code = ISNULL(MAX(Code), 0) + 1 FROM Vouchers WHERE Type = @Type

	SELECT @VoucherID = NEWID(), 
		@CreationDate = GETDATE(), 
		@LastEditDate = GETDATE(), 
		@Date = COALESCE(@Date, GETDATE())

	INSERT INTO [Vouchers] ([VoucherID], [Code], [Ref], [Date], [Narration], [UserID], [CreationDate], [LastEditDate], [Type])
		VALUES (@VoucherID, @Code, @Ref, @Date, @Narration, @UserID, @CreationDate, @LastEditDate, @Type)

	SELECT @timestamp = timestamp FROM [dbo].[Vouchers] WHERE VoucherID = @VoucherID
"))
            {
                cmd.Parameters.Add("@VoucherID", System.Data.SqlDbType.UniqueIdentifier);
                cmd.Parameters["@VoucherID"].Direction = System.Data.ParameterDirection.Output;
                cmd.Parameters.Add("@Code", System.Data.SqlDbType.Int);
                cmd.Parameters["@Code"].Direction = System.Data.ParameterDirection.Output;
                cmd.Parameters.AddWithValue("@Ref", voucher.Ref);

                cmd.Parameters.Add("@Date", System.Data.SqlDbType.DateTime);
                if (voucher.Date.HasValue)
                    cmd.Parameters["@Date"].Value = voucher.Date.Value;
                else
                    cmd.Parameters["@Date"].Value = DBNull.Value;
                cmd.Parameters["@Date"].Direction = System.Data.ParameterDirection.InputOutput;

                cmd.Parameters.AddWithValue("@Narration", voucher.Narration);
                cmd.Parameters.AddWithValue("@UserID", voucher.UserID);
                cmd.Parameters.Add("@CreationDate", System.Data.SqlDbType.DateTime);
                cmd.Parameters["@CreationDate"].Direction = System.Data.ParameterDirection.Output;
                cmd.Parameters.Add("@LastEditDate", System.Data.SqlDbType.DateTime);
                cmd.Parameters["@LastEditDate"].Direction = System.Data.ParameterDirection.Output;
                cmd.Parameters.AddWithValue("@Type", voucher.Type);
                cmd.Parameters.Add("@timestamp", System.Data.SqlDbType.Timestamp);
                cmd.Parameters["@timestamp"].Direction = System.Data.ParameterDirection.Output;
                connection.ExecuteNonQuery(cmd);
                voucher.VoucherID = (Guid)cmd.Parameters["@VoucherID"].Value;
                voucher.Code = (int)cmd.Parameters["@Code"].Value;
                voucher.CreationDate = (DateTime)cmd.Parameters["@CreationDate"].Value;
                voucher.LastEditDate = (DateTime)cmd.Parameters["@LastEditDate"].Value;
                voucher.Date = (DateTime)cmd.Parameters["@Date"].Value;
                voucher.timestamp = (byte[])cmd.Parameters["@timestamp"].Value;

                return true;
            }
        }
        public VoucherBO GetVoucher(Guid voucherID)
        {
            SqlCommand cmd = new SqlCommand("SELECT * FROM Vouchers WHERE VoucherID = @VoucherID");
            cmd.Parameters.AddWithValue("@VoucherID", voucherID);
            return BusinessObjectDAO<VoucherBO>.GetBusinessObject(connection.ExecuteReader(cmd));
        }
        public bool Delete(Guid voucherID)
        {
            using (SqlCommand cmd = new SqlCommand("DELETE from Vouchers where VoucherID = @VoucherID"))
            {
                cmd.Parameters.AddWithValue("@VoucherID", voucherID);
                connection.ExecuteNonQuery(cmd);
                return true;
            }
        }
        public bool Update(VoucherBO voucher)
        {
            using (SqlCommand cmd = new SqlCommand(@"
	SELECT @LastEditDate = GETDATE(), 
		@Date = COALESCE(@Date, GETDATE())

	UPDATE [Vouchers]
		SET [Ref] = @Ref,
		[Date] = @Date,
		[Narration] = @Narration,
		[UserID] = @UserID,
		[LastEditDate] = @LastEditDate,
		[Type] = @Type
		WHERE [VoucherID] = @VoucherID

	SELECT @Code = Code, @CreationDate = CreationDate, @timestamp = timestamp 
		FROM [Vouchers] 
		WHERE [VoucherID] = @VoucherID
"))
            {
                cmd.Parameters.AddWithValue("@VoucherID", voucher.VoucherID);
                cmd.Parameters.AddWithValue("@Code", voucher.Code);
                cmd.Parameters["@Code"].Direction = System.Data.ParameterDirection.Output;
                cmd.Parameters.AddWithValue("@Ref", voucher.Ref);

                cmd.Parameters.Add("@Date", System.Data.SqlDbType.DateTime);
                if (voucher.Date.HasValue)
                    cmd.Parameters["@Date"].Value = voucher.Date.Value;
                else
                    cmd.Parameters["@Date"].Value = DBNull.Value;
                cmd.Parameters["@Date"].Direction = System.Data.ParameterDirection.InputOutput;

                cmd.Parameters.AddWithValue("@Narration", voucher.Narration);
                cmd.Parameters.AddWithValue("@UserID", voucher.UserID);
                cmd.Parameters.Add("@CreationDate", System.Data.SqlDbType.DateTime);
                cmd.Parameters["@CreationDate"].Direction = System.Data.ParameterDirection.Output;
                cmd.Parameters.Add("@LastEditDate", System.Data.SqlDbType.DateTime);
                cmd.Parameters["@LastEditDate"].Direction = System.Data.ParameterDirection.Output;
                cmd.Parameters.AddWithValue("@Type", voucher.Type);
                cmd.Parameters.AddWithValue("@timestamp", voucher.timestamp);
                connection.ExecuteNonQuery(cmd);
                voucher.Code = (int)cmd.Parameters["@Code"].Value;
                voucher.CreationDate = (DateTime)cmd.Parameters["@CreationDate"].Value;
                voucher.LastEditDate = (DateTime)cmd.Parameters["@LastEditDate"].Value;
                voucher.Date = (DateTime)cmd.Parameters["@Date"].Value;
                voucher.timestamp = (byte[])cmd.Parameters["@timestamp"].Value;
                return true;
            }
        }
    }
}