using System;
using System.Data.SqlClient;
using System.Data;
using Tanshu.Accounts.Contracts;
using Tanshu.Accounts.DAOFactory;
using Tanshu.Data.DAO;

namespace Tanshu.Accounts.SqlDAO
{
    public class CheckoutDAO : BaseDAO, ICheckoutDAO
    {
        private readonly DateTime _startDate;
        private readonly DateTime _finishDate;
        private readonly Guid _userID;
        public CheckoutDAO(DateTime startDate, DateTime finishDate, Guid userID, IConnectionDAO connection)
            : base(connection)
        {
            _startDate = startDate;
            _finishDate = finishDate;
            _userID = userID;
        }
        public decimal GetDetail(ref string info, PaidStatus paidStatus, string infoLine)
        {
            decimal amount = 0;
            info = "";

            const string query = @"
SELECT t.Date, s.BillID, c.Name, SUM(i.Amount) AS Amount, SUM(Quantity * Rate * Discount) AS Discount FROM Vouchers t INNER JOIN SaleVoucher s ON t.VoucherID = s.VoucherID
INNER JOIN Inventory i ON t.VoucherID = i.VoucherID
INNER JOIN Customers c ON s.CustomerID = c.CustomerID
WHERE t.Type = 'S'
AND t.LastEditDate BETWEEN @StartDate AND @FinishDate AND t.UserID = @UserID
AND s.PaidStatus = @PaidStatus
GROUP  BY t.Date, c.Name, s.BillID
";
            using (var cmd = new SqlCommand(query))
            {
                cmd.Parameters.AddWithValue("@PaidStatus", (int)paidStatus);
                cmd.Parameters.AddWithValue("@StartDate", _startDate);
                cmd.Parameters.AddWithValue("@FinishDate", _finishDate);
                cmd.Parameters.AddWithValue("@UserID", _userID);

                using (var dr = connection.ExecuteReader(cmd))
                {
                    if (dr.Read())
                    {
                        info = infoLine;

                        do
                        {
                            amount += dr.GetDecimal(3);
                            info += string.Format("\n\r{0:dd-MMM-yyyy HH:mm:ss} {1} {2}", dr.GetDateTime(0), dr.GetString(1), dr.GetString(2));
                            info += string.Format("\n\rAmount: {0:#0.00} :: Discount: {1:#0.00}", dr.GetDecimal(3), dr.GetDecimal(4));
                            info += "\n\r------------------------------------------";
                        } while (dr.Read());
                    }
                }
            }
            return amount;
        }

        public decimal GetOpenings()
        {
            const string query = "SELECT ISNULL(SUM(Amount), 0) FROM Payments WHERE Type = 'Opening' AND Date BETWEEN @StartDate AND @FinishDate AND CashierID = @UserID";
            using (var cmd = new SqlCommand(query))
            {
                cmd.Parameters.AddWithValue("@StartDate", _startDate);
                cmd.Parameters.AddWithValue("@FinishDate", _finishDate);
                cmd.Parameters.AddWithValue("@UserID", _userID);
                return (decimal)connection.ExecuteScalar(cmd);
            }
        }

        public decimal GetReceipts()
        {
            const string query = "SELECT ISNULL(SUM(Amount), 0) FROM Payments WHERE Type = 'Receipt' AND Date BETWEEN @StartDate AND @FinishDate AND CashierID = @UserID";
            using (var cmd = new SqlCommand(query))
            {
                cmd.Parameters.AddWithValue("@StartDate", _startDate);
                cmd.Parameters.AddWithValue("@FinishDate", _finishDate);
                cmd.Parameters.AddWithValue("@UserID", _userID);
                return (decimal)connection.ExecuteScalar(cmd);
            }
        }

        public decimal GetPayments()
        {
            const string query = "SELECT ISNULL(SUM(Amount), 0) FROM Payments WHERE Type = 'Payment' AND Date BETWEEN @StartDate AND @FinishDate AND CashierID = @UserID";
            using (var cmd = new SqlCommand(query))
            {
                cmd.Parameters.AddWithValue("@StartDate", _startDate);
                cmd.Parameters.AddWithValue("@FinishDate", _finishDate);
                cmd.Parameters.AddWithValue("@UserID", _userID);
                return (decimal)connection.ExecuteScalar(cmd);
            }
        }

        public decimal GetAdditionalVoids()
        {
            const string query = "SELECT ISNULL(SUM(Amount), 0) FROM Payments WHERE Type = 'Additional Void' AND Date BETWEEN @StartDate AND @FinishDate AND CashierID = @UserID";
            using (var cmd = new SqlCommand(query))
            {
                cmd.Parameters.AddWithValue("@StartDate", _startDate);
                cmd.Parameters.AddWithValue("@FinishDate", _finishDate);
                cmd.Parameters.AddWithValue("@UserID", _userID);
                return (decimal)connection.ExecuteScalar(cmd);
            }
        }

        public decimal GetRetainedOvernight()
        {
            const string query = "SELECT ISNULL(SUM(Amount), 0) FROM Payments WHERE Type = 'Retained at Night' AND Date BETWEEN @StartDate AND @FinishDate AND CashierID = @UserID";
            using (var cmd = new SqlCommand(query))
            {
                cmd.Parameters.AddWithValue("@StartDate", _startDate);
                cmd.Parameters.AddWithValue("@FinishDate", _finishDate);
                cmd.Parameters.AddWithValue("@UserID", _userID);
                return (decimal)connection.ExecuteScalar(cmd);
            }
        }

        public decimal GetAdvancesReceived()
        {
            const string query = "SELECT ISNULL(SUM(Amount), 0) FROM Advances WHERE DateIn BETWEEN @StartDate AND @FinishDate AND CashierIn = @UserID";
            using (var cmd = new SqlCommand(query))
            {
                cmd.Parameters.AddWithValue("@StartDate", _startDate);
                cmd.Parameters.AddWithValue("@FinishDate", _finishDate);
                cmd.Parameters.AddWithValue("@UserID", _userID);
                return (decimal)connection.ExecuteScalar(cmd);
            }
        }

        public decimal GetAdvancesAdjusted()
        {
            const string query = "SELECT ISNULL(SUM(Amount), 0) FROM Advances WHERE DateOut BETWEEN @StartDate AND @FinishDate AND CashierOut = @UserID";
            using (var cmd = new SqlCommand(query))
            {
                cmd.Parameters.AddWithValue("@StartDate", _startDate);
                cmd.Parameters.AddWithValue("@FinishDate", _finishDate);
                cmd.Parameters.AddWithValue("@UserID", _userID);
                return (decimal)connection.ExecuteScalar(cmd);
            }
        }

        public string GetPaymentString()
        {
            var paymentString = "";
            const string query = "SELECT Date, Type, Amount, Narration FROM Payments WHERE Date BETWEEN @StartDate AND @FinishDate AND CashierID = @UserID ORDER BY Type";
            using (var cmd = new SqlCommand(query))
            {
                cmd.Parameters.AddWithValue("@StartDate", _startDate);
                cmd.Parameters.AddWithValue("@FinishDate", _finishDate);
                cmd.Parameters.AddWithValue("@UserID", _userID);
                using (IDataReader dr = connection.ExecuteReader(cmd))
                {
                    string currentType = "";
                    while (dr.Read())
                    {
                        if (currentType != dr.GetString(1))
                        {
                            paymentString += string.Format("\n\r--- {0,-30} -------", dr.GetString(1));
                            currentType = dr.GetString(1);
                        }
                        paymentString += string.Format("\n\r{0:HH:mm} => {1:#0.00} => {2}", dr.GetDateTime(0), dr.GetDecimal(2), dr.GetString(3));
                    }
                }
            }
            return paymentString;
        }
        public string GetActiveCashiers()
        {
            string cashiers = "";
            string query = @"
SELECT Name FROM Users WHERE UserID IN
(
SELECT DISTINCT UserID FROM Vouchers WHERE Date BETWEEN @StartDate AND @FinishDate 
UNION 
SELECT DISTINCT CashierID FROM Payments WHERE Date BETWEEN @StartDate AND @FinishDate 
UNION
SELECT DISTINCT CashierIn FROM Advances WHERE DateIn BETWEEN @StartDate AND @FinishDate 
UNION
SELECT DISTINCT CashierOut FROM Advances WHERE DateOut BETWEEN @StartDate AND @FinishDate
)";

            using (SqlCommand cmd = new SqlCommand(query))
            {
                cmd.Parameters.AddWithValue("@StartDate", _startDate);
                cmd.Parameters.AddWithValue("@FinishDate", _finishDate);

                using (IDataReader dr = connection.ExecuteReader(cmd))
                {
                    while (dr.Read())
                    {
                        cashiers += string.Format("{0}, ", dr.GetString(0));
                    }
                }
            }
            return cashiers;
        }
        public decimal GetNetSales()
        {
            const string query = @"
SELECT ISNULL(SUM(i.Amount), 0) AS Amount FROM Vouchers t INNER JOIN SaleVoucher s ON t.VoucherID = s.VoucherID
INNER JOIN Inventory i ON t.VoucherID = i.VoucherID
INNER JOIN Customers c ON s.CustomerID = c.CustomerID
WHERE t.Type = 'S'
AND t.LastEditDate BETWEEN @StartDate AND @FinishDate AND t.UserID = @UserID
AND s.PaidStatus != @Pending AND s.PaidStatus != @Void
";
            using (var cmd = new SqlCommand(query))
            {
                cmd.Parameters.AddWithValue("@Pending", (int)PaidStatus.Pending);
                cmd.Parameters.AddWithValue("@Void", (int)PaidStatus.Void);
                cmd.Parameters.AddWithValue("@StartDate", _startDate);
                cmd.Parameters.AddWithValue("@FinishDate", _finishDate);
                cmd.Parameters.AddWithValue("@UserID", _userID);
                return (decimal)connection.ExecuteScalar(cmd);
            }
        }

        public decimal GetDiscountsBills(ref string info)
        {
            decimal amount = 0;
            info = "";

            const string query = @"
SELECT t.Date, s.BillID, c.Name, SUM(i.Amount) AS Amount, SUM(Quantity * Rate * Discount) AS Discount FROM Vouchers t INNER JOIN SaleVoucher s ON t.VoucherID = s.VoucherID
INNER JOIN Inventory i ON t.VoucherID = i.VoucherID
INNER JOIN Customers c ON s.CustomerID = c.CustomerID
WHERE t.Type = 'S'
AND t.LastEditDate BETWEEN @StartDate AND @FinishDate AND t.UserID = @UserID
AND s.PaidStatus != @Pending AND s.PaidStatus != @Void
GROUP  BY t.Date, c.Name, s.BillID, i.Discount
HAVING i.Discount >= .05
";
            using (var cmd = new SqlCommand(query))
            {
                cmd.Parameters.AddWithValue("@Pending", (int)PaidStatus.Pending);
                cmd.Parameters.AddWithValue("@Void", (int)PaidStatus.Void);
                cmd.Parameters.AddWithValue("@StartDate", _startDate);
                cmd.Parameters.AddWithValue("@FinishDate", _finishDate);
                cmd.Parameters.AddWithValue("@UserID", _userID);
                using (IDataReader dr = connection.ExecuteReader(cmd))
                {
                    if (dr.Read())
                    {
                        info = "\n\r--- High Discounts Bills -----------------";

                        do
                        {
                            amount += dr.GetDecimal(3);
                            info += string.Format("\n\r{0:dd-MMM-yyyy HH:mm:ss} {1} {2}", dr.GetDateTime(0), dr.GetString(1), dr.GetString(2));
                            info += string.Format("\n\rAmount: {0:#0.00} :: Discount: {1:#0.00}", dr.GetDecimal(3), dr.GetDecimal(4));
                            info += "\n\r------------------------------------------";
                        } while (dr.Read());
                    }
                }
            }
            return amount;
        }

        public decimal GetOldPending()
        {
            const string query = @"
SELECT ISNULL(SUM(i.Amount), 0) FROM Vouchers t INNER JOIN SaleVoucher s ON t.VoucherID = s.VoucherID
INNER JOIN Inventory i ON t.VoucherID = i.VoucherID
WHERE t.Type = 'S'
AND s.PaidStatus = @Pending 
AND t.LastEditDate < @StartDate AND t.UserID = @UserID
";
            using (var cmd = new SqlCommand(query))
            {
                cmd.Parameters.AddWithValue("@Pending", (int)PaidStatus.Pending);
                cmd.Parameters.AddWithValue("@StartDate", _startDate);
                cmd.Parameters.AddWithValue("@UserID", _userID);
                return (decimal)connection.ExecuteScalar(cmd);
            }
        }

        public decimal GetOldReceipts()
        {
            const string query = @"
SELECT ISNULL(SUM(i.Amount), 0) FROM Vouchers t INNER JOIN SaleVoucher s ON t.VoucherID = s.VoucherID
INNER JOIN Inventory i ON t.VoucherID = i.VoucherID
WHERE t.Type = 'S'
AND s.PaidStatus != @Pending AND s.PaidStatus != @Void
AND t.CreationDate < @StartDate AND t.LastEditDate >= @StartDate AND t.UserID = @UserID
";
            using (var cmd = new SqlCommand(query))
            {
                cmd.Parameters.AddWithValue("@Pending", (int)PaidStatus.Pending);
                cmd.Parameters.AddWithValue("@Void", (int)PaidStatus.Void);
                cmd.Parameters.AddWithValue("@StartDate", _startDate);
                cmd.Parameters.AddWithValue("@UserID", _userID);
                return (decimal)connection.ExecuteScalar(cmd);
            }
        }

        public decimal GetOldVoided()
        {
            const string query = @"
SELECT ISNULL(SUM(i.Amount), 0) FROM Vouchers t INNER JOIN SaleVoucher s ON t.VoucherID = s.VoucherID
INNER JOIN Inventory i ON t.VoucherID = i.VoucherID
WHERE t.Type = 'S'
AND s.PaidStatus = @Void
AND t.CreationDate < @StartDate AND t.LastEditDate >= @StartDate AND t.UserID = @UserID
";
            using (var cmd = new SqlCommand(query))
            {
                cmd.Parameters.AddWithValue("@Void", (int)PaidStatus.Void);
                cmd.Parameters.AddWithValue("@StartDate", _startDate);
                cmd.Parameters.AddWithValue("@UserID", _userID);
                return (decimal)connection.ExecuteScalar(cmd);
            }
        }
    }
}