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


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

        public List<SalesAnalysisBO> GetSalesTaxReturn(DateTime startDate, DateTime finishDate, ref decimal voids, ref decimal pending, ref decimal net, ref decimal vat, ref decimal serviceTax, ref decimal nc)
        {
            var list = new List<SalesAnalysisBO>();
            using (var cmd = new SqlCommand())
            {
                const string query = @"
SELECT NEWID(), 
CAST(i.Tax AS nvarchar(10)) AS Section, 
SUM(i.Quantity * i.Rate * (1 - i.Discount) * (i.Tax)) AS Quantity, 
SUM(i.Quantity * i.Rate * (1 - i.Discount)) AS Net, 
SUM(i.Amount) AS Gross
FROM Vouchers v INNER JOIN Inventory i ON v.VoucherID = i.VoucherID
WHERE v.PaidStatus NOT IN (@Pending, @Void, @Nc)
AND v.Date BETWEEN @StartDate AND @FinishDate
GROUP BY i.Tax
ORDER BY Section DESC;";
                cmd.CommandText = query;
                cmd.Parameters.AddWithValue("@Pending", (int)PaidStatus.Pending);
                cmd.Parameters.AddWithValue("@Void", (int)PaidStatus.Void);
                cmd.Parameters.AddWithValue("@Nc", (int)PaidStatus.Nc);
                cmd.Parameters.AddWithValue("@StartDate", startDate);
                cmd.Parameters.AddWithValue("@FinishDate", finishDate);
                list = BusinessObjectDAO<SalesAnalysisBO>.GetBusinessObjects(connection.ExecuteReader(cmd));
            }


            using (var cmd = new SqlCommand())
            {
                const string query = @"
SELECT ISNULL(SUM(i.Quantity * i.Rate), 0) AS Amount
FROM Vouchers v
INNER JOIN Inventory i ON v.VoucherID = i.VoucherID
WHERE v.PaidStatus = @Nc
AND v.Date BETWEEN @StartDate AND @FinishDate
";
                cmd.CommandText = query;
                cmd.Parameters.AddWithValue("@Nc", (int)PaidStatus.Nc);
                cmd.Parameters.AddWithValue("@StartDate", startDate);
                cmd.Parameters.AddWithValue("@FinishDate", finishDate);
                nc = Math.Round((decimal)connection.ExecuteScalar(cmd));
            }
            using (var cmd = new SqlCommand())
            {
                const string query = @"
SELECT ISNULL(SUM(i.Amount), 0) AS Amount
FROM Vouchers v INNER JOIN Inventory i ON v.VoucherID = i.VoucherID
WHERE v.Date BETWEEN @StartDate AND @FinishDate
AND v.PaidStatus = @Void";
                cmd.CommandText = query;
                cmd.Parameters.AddWithValue("@Void", (int)PaidStatus.Void);
                cmd.Parameters.AddWithValue("@StartDate", startDate);
                cmd.Parameters.AddWithValue("@FinishDate", finishDate);
                voids = Math.Round((decimal)connection.ExecuteScalar(cmd));
            }
            using (var cmd = new SqlCommand())
            {
                const string query = @"
SELECT ISNULL(SUM(i.Amount), 0) AS Amount
FROM Vouchers v INNER JOIN Inventory i ON v.VoucherID = i.VoucherID
WHERE v.PaidStatus = @Pending
AND v.Date BETWEEN @StartDate AND @FinishDate";
                cmd.CommandText = query;
                cmd.Parameters.AddWithValue("@Pending", (int)PaidStatus.Pending);
                cmd.Parameters.AddWithValue("@StartDate", startDate);
                cmd.Parameters.AddWithValue("@FinishDate", finishDate);
                pending = Math.Round((decimal)connection.ExecuteScalar(cmd));
            }
            using (var cmd = new SqlCommand())
            {
                const string query = @"
SELECT ISNULL(SUM(Quantity * Rate * (1 - Discount )), 0) AS Amount
FROM Vouchers v INNER JOIN Inventory i ON v.VoucherID = i.VoucherID
WHERE v.PaidStatus NOT IN (@Pending, @Void, @Nc)
AND v.Date BETWEEN @StartDate AND @FinishDate";
                cmd.CommandText = query;
                cmd.Parameters.AddWithValue("@Pending", (int)PaidStatus.Pending);
                cmd.Parameters.AddWithValue("@Void", (int)PaidStatus.Void);
                cmd.Parameters.AddWithValue("@Nc", (int)PaidStatus.Nc);
                cmd.Parameters.AddWithValue("@StartDate", startDate);
                cmd.Parameters.AddWithValue("@FinishDate", finishDate);
                net = Math.Round((decimal)connection.ExecuteScalar(cmd));
            }
            using (var cmd = new SqlCommand())
            {
                const string query = @"
SELECT ISNULL(SUM(i.Quantity * i.Rate * (1 - i.Discount) * i.Vat), 0) AS Amount
FROM Vouchers v INNER JOIN Inventory i ON v.VoucherID = i.VoucherID
WHERE v.PaidStatus NOT IN (@Pending, @Void, @Nc)
AND v.Date BETWEEN @StartDate AND @FinishDate";
                cmd.CommandText = query;
                cmd.Parameters.AddWithValue("@Pending", (int)PaidStatus.Pending);
                cmd.Parameters.AddWithValue("@Void", (int)PaidStatus.Void);
                cmd.Parameters.AddWithValue("@Nc", (int)PaidStatus.Nc);
                cmd.Parameters.AddWithValue("@StartDate", startDate);
                cmd.Parameters.AddWithValue("@FinishDate", finishDate);
                vat = Math.Round((decimal)connection.ExecuteScalar(cmd));
            }
            using (var cmd = new SqlCommand())
            {
                const string query = @"
SELECT ISNULL(SUM(i.Quantity * i.Rate * (1 - i.Discount) * i.ServiceTax), 0) AS Amount
FROM Vouchers v INNER JOIN Inventory i ON v.VoucherID = i.VoucherID
WHERE v.PaidStatus NOT IN (@Pending, @Void, @Nc)
AND v.Date BETWEEN @StartDate AND @FinishDate";
                cmd.CommandText = query;
                cmd.Parameters.AddWithValue("@Pending", (int)PaidStatus.Pending);
                cmd.Parameters.AddWithValue("@Void", (int)PaidStatus.Void);
                cmd.Parameters.AddWithValue("@Nc", (int)PaidStatus.Nc);
                cmd.Parameters.AddWithValue("@StartDate", startDate);
                cmd.Parameters.AddWithValue("@FinishDate", finishDate);
                serviceTax = Math.Round((decimal)connection.ExecuteScalar(cmd));
            }
            return list;
        }
        public List<SalesAnalysisDetailBO> GetSaleDetail(DateTime startDate, DateTime finishDate, Guid productGroupID)
        {
            using (SqlCommand cmd = new SqlCommand())
            {
                string query = @"
SELECT p.Name AS Product, pt.Name AS Section, SUM(i.Quantity) AS Quantity, SUM(i.Amount) AS Amount
FROM Vouchers v INNER JOIN Inventory i ON v.VoucherID = i.VoucherID
INNER JOIN Products p ON i.ProductID = p.ProductID
INNER JOIN ProductGroups pt ON p.ProductGroupID = pt.ProductGroupID
WHERE v.PaidStatus != @Pending AND v.PaidStatus != @Void
AND v.LastEditDate BETWEEN @StartDate AND @FinishDate AND p.ProductGroupID = @ProductGroupID
GROUP BY p.Name, pt.Name
ORDER BY Amount DESC;";
                cmd.CommandText = 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("@ProductGroupID", productGroupID);
                return BusinessObjectDAO<SalesAnalysisDetailBO>.GetBusinessObjects(connection.ExecuteReader(cmd));

            }
        }
        public List<SalesAnalysisBO> GetSale(DateTime startDate, DateTime finishDate)
        {
            using (var cmd = new SqlCommand())
            {
                const string query = @"
SELECT pg.ProductGroupID, pg.Name, SUM(i.Quantity * i.Rate * (1 - i.Discount)) AS Net, SUM(i.Quantity * i.Rate * (1 - i.Discount) * i.Vat) AS Vat, SUM(i.Quantity * i.Rate * (1 - i.Discount) * i.ServiceTax) AS ServiceTax
FROM Vouchers v
INNER JOIN Inventory i ON v.VoucherID = i.VoucherID
INNER JOIN Products p ON i.ProductID = p.ProductID
INNER JOIN ProductGroups pg ON p.ProductGroupID = pg.ProductGroupID
WHERE v.PaidStatus != @Pending AND v.PaidStatus != @Void
AND v.LastEditDate BETWEEN @StartDate AND @FinishDate
GROUP BY pg.ProductGroupID, pg.Name
ORDER BY Net DESC;";
                cmd.CommandText = 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);
                var list = BusinessObjectDAO<SalesAnalysisBO>.GetBusinessObjects(connection.ExecuteReader(cmd));
                decimal net = 0, vat = 0, serviceTax = 0;
                foreach (var i in list)
                {
                    net += i.Net;
                    vat += i.Vat;
                    serviceTax += i.ServiceTax;
                }
                list.Add(new SalesAnalysisBO
                {
                    Name = "Total",
                    Net = net,
                    Vat = vat,
                    ServiceTax = serviceTax
                });
                list.Add(new SalesAnalysisBO() { Name = "  --  " });
                return GetSettlement(list, startDate, finishDate);
            }
        }

        private List<SalesAnalysisBO> GetSettlement(List<SalesAnalysisBO> outList, DateTime startDate, DateTime finishDate)
        {
            outList.Add(new SalesAnalysisBO() { Name = "  --  " });
            if (finishDate <= startDate)
                return new List<SalesAnalysisBO>();
            using (var cmd = new SqlCommand())
            {
                const string query = @"
SELECT v.PaidStatus AS Status, Sum(i.Amount) AS Amount
FROM Vouchers v
INNER JOIN Inventory i ON v.VoucherID = i.VoucherID
WHERE v.LastEditDate BETWEEN @StartDate AND @FinishDate
GROUP BY v.PaidStatus
ORDER BY v.PaidStatus
";
                cmd.CommandText = query;
                cmd.Parameters.AddWithValue("@StartDate", startDate);
                cmd.Parameters.AddWithValue("@FinishDate", finishDate);

                var list = BusinessObjectDAO<SettlementReportBO>.GetBusinessObjects(connection.ExecuteReader(cmd));
                decimal amount = 0;
                foreach (var item in list)
                {
                    amount += item.Amount;
                    outList.Add(new SalesAnalysisBO() { Name = item.Status.ToString(), Net = item.Amount });
                }
                outList.Add(new SalesAnalysisBO() { Name = "Total", Net = amount });
                return GetAdvances(outList, startDate, finishDate);
            }
        }

        private List<SalesAnalysisBO> GetAdvances(List<SalesAnalysisBO> outList, DateTime startDate, DateTime finishDate)
        {
            outList.Add(new SalesAnalysisBO() { Name = "  --  " });
            if (finishDate <= startDate)
                return new List<SalesAnalysisBO>();
            using (var cmd = new SqlCommand())
            {
                string query = "SELECT a.*, ui.Name AS Cashier, ISNULL(uo.Name, '') AS UserOut FROM Advances a INNER JOIN Users ui ON a.CashierIn = ui.UserID LEFT OUTER JOIN Users uo ON a.CashierOut = uo.UserID WHERE DateIn BETWEEN @StartDate AND @FinishDate OR (DateOut is not null AND DateOut BETWEEN @StartDate AND @FinishDate)";
                cmd.CommandText = query;
                cmd.Parameters.AddWithValue("@StartDate", startDate);
                cmd.Parameters.AddWithValue("@FinishDate", finishDate);

                var list = BusinessObjectDAO<AdvanceDisplayBO>.GetBusinessObjects(connection.ExecuteReader(cmd));
                decimal amount = 0;
                foreach (var item in list)
                {
                    if (item.DateIn >= startDate && item.DateIn <= finishDate)
                    {
                        amount += item.Amount;
                        outList.Add(new SalesAnalysisBO() { Name = string.Format("Advance In {0}", item.Cashier), Net = item.Amount });
                    }
                    if (item.DateOut.HasValue && item.DateOut >= startDate && item.DateOut <= finishDate)
                    {
                        amount -= item.Amount;
                        outList.Add(new SalesAnalysisBO() { Name = string.Format("Advance Out {0}", item.UserOut), Net = item.Amount });
                    }
                }
                outList.Add(new SalesAnalysisBO() { Name = "Total Advance Taken", Net = amount });
                return outList;
            }
        }

        public decimal GetDetail(PaidStatus paidStatus, DateTime startDate, DateTime finishDate)
        {
            const string query = @"
SELECT SUM(i.Amount) AS Amount, SUM(i.Quantity * i.Rate * i.Discount) AS Discount FROM Vouchers v
INNER JOIN Inventory i ON v.VoucherID = i.VoucherID
WHERE v.LastEditDate BETWEEN @StartDate AND @FinishDate
AND v.PaidStatus = @PaidStatus
";
            using (var cmd = new SqlCommand(query))
            {
                cmd.Parameters.AddWithValue("@PaidStatus", (int)paidStatus);
                cmd.Parameters.AddWithValue("@StartDate", startDate);
                cmd.Parameters.AddWithValue("@FinishDate", finishDate);
                return (decimal)connection.ExecuteScalar(cmd);
            }
        }
    }
}