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 PaymentDAO : BaseDAO, IPaymentDAO
    {
        public PaymentDAO(IConnectionDAO connection)
            : base(connection)
        { }

        public void Insert(PaymentBO payment)
        {
            using (SqlCommand cmd = new SqlCommand(@"
SET @PaymentID = NEWID();
INSERT INTO Payments (PaymentID, Date, Type, CashierID, Amount, Narration) 
VALUES (@PaymentID, @Date, @Type, @CashierID, @Amount, @Narration)
"))
            {
                cmd.Parameters.Add("@PaymentID", System.Data.SqlDbType.UniqueIdentifier);
                cmd.Parameters["@PaymentID"].Direction = System.Data.ParameterDirection.Output;
                cmd.Parameters.AddWithValue("@Date", payment.Date);
                cmd.Parameters.AddWithValue("@Type", payment.Type);
                cmd.Parameters.AddWithValue("@CashierID", payment.CashierID);
                cmd.Parameters.AddWithValue("@Amount", payment.Amount);
                cmd.Parameters.AddWithValue("@Narration", payment.Narration);
                connection.ExecuteNonQuery(cmd);
                payment.PaymentID = (Guid)cmd.Parameters["@PaymentID"].Value;
            }
        }
        public List<PaymentDisplayBO> GetPayments(Guid? userID, DateTime fromDate, DateTime toDate)
        {
            string query = "SELECT p.*, u.Name AS Cashier FROM Payments p INNER JOIN Users u ON p.CashierID = u.UserID WHERE Date BETWEEN @StartDate AND @FinishDate";
            if (userID.HasValue)
                query += " AND CashierID = @CashierID";
            SqlCommand cmd = new SqlCommand(query);
            cmd.Parameters.AddWithValue("@StartDate", fromDate);
            cmd.Parameters.AddWithValue("@FinishDate", toDate);
            if (userID.HasValue)
                cmd.Parameters.AddWithValue("@CashierID", userID.Value);
            return BusinessObjectDAO<PaymentDisplayBO>.GetBusinessObjects(connection.ExecuteReader(cmd));
        }
        public void Delete(Guid paymentID)
        {
            using (SqlCommand cmd = new SqlCommand("DELETE FROM Payments WHERE PaymentID = @PaymentID"))
            {
                cmd.Parameters.AddWithValue("@PaymentID", paymentID);
                connection.ExecuteNonQuery(cmd);
            }
        }
    }
}