using System;
using System.Collections.Generic;
using System.Linq;
using Tanshu.Accounts.Entities;
using Tanshu.Accounts.Entities.Auth;
using NHibernate.Criterion;
using Tanshu.Accounts.Contracts;
using Tanshu.Common.Helpers;

namespace Tanshu.Accounts.Repository
{
    public class CheckoutBI
    {
        #region Properties
        public decimal Opening { get; private set; }
        public decimal Receipts { get; private set; }
        public decimal AdvanceReceipts { get; private set; }
        public decimal CcReceipts { get; private set; }
        public decimal NcReceipts { get; private set; }
        public decimal BtcReceipts { get; private set; }
        public decimal AdvanceAdjusted { get; private set; }
        public decimal CashPayments { get; private set; }
        public decimal AdditionalVoids { get; private set; }
        public decimal VoidsInSystem { get; private set; }
        public decimal Discount { get; private set; }
        public decimal PendingBills { get; private set; }
        public decimal CashReceipts { get; private set; }
        public decimal ClosingBalance { get; private set; }
        public decimal RetainedOvernight { get; private set; }
        public decimal CashDeposited { get; private set; } //
        public decimal Excess { get; private set; } //
        public string Status { get; private set; } //
        public string Cashiers { get; private set; } //
        public User Cashier { get; private set; }

        public decimal OldPending { get; private set; }
        public decimal OldReceipts { get; private set; }
        public decimal OldVoided { get; private set; }

        public DateTime StartDate { get; private set; }
        public DateTime FinishDate { get; private set; }

        public string PendingString { get; private set; }
        public string CcString { get; private set; }
        public string NcString { get; private set; }
        public string BtcString { get; private set; }
        public string VoidsString { get; private set; }
        public string DiscountString { get; private set; }

        public string PaymentString { get; private set; }
        public string Manager
        {
            get { return Session.User.Name; }
        }
        #endregion

        public CheckoutBI(int cashier, DateTime startDate, DateTime finishDate)
        {
            using (var session = SessionManager.Session)
            {
                using (var bi = new UserBI(session, false))
                    this.Cashier = bi.Get(x => x.UserID == cashier);
                this.StartDate = startDate.Date.AddHours(6);
                this.FinishDate = finishDate.Date.AddDays(1).AddHours(5);

                string info;
                PendingBills = GetPrintInfo(out info, SettleOption.Unsettled);
                PendingString = info;
                CcReceipts = GetPrintInfo(out info, SettleOption.CreditCard);
                CcString = info;
                NcReceipts = GetPrintInfo(out info, SettleOption.NoCharge);
                NcString = info;
                BtcReceipts = GetPrintInfo(out info, SettleOption.BillToCompany);
                BtcString = info;
                VoidsInSystem = GetVoids(out info);
                VoidsString = info;
                //        Opening = dao.GetOpenings();
                //        Receipts = GetReceipts();
                PaymentString = "";
                //        CashPayments = dao.GetPayments();
                //        AdditionalVoids = dao.GetAdditionalVoids();
                //        RetainedOvernight = dao.GetRetainedOvernight();

                AdvanceReceipts = GetAdvancesReceived();
                AdvanceAdjusted = GetAdvancesAdjusted();
                //        PaymentString = dao.GetPaymentString();

                //        OldPending = dao.GetOldPending();
                //        OldReceipts = dao.GetOldReceipts();
                //        OldVoided = dao.GetOldVoided();


                Cashiers = GetActiveCashiers();
                CashReceipts = GetPrintInfo(out info, SettleOption.Cash);
                Discount = GetDiscountBills(.1M, out info);
                DiscountString = info;
                ClosingBalance = Opening
                    + Receipts
                    + AdvanceReceipts
                    - CashPayments
                    - AdditionalVoids
                    + CashReceipts;
            }
        }

        #region Advances
        private decimal GetAdvancesAdjusted()
        {
            using (var session = SessionManager.Session)
            {
                var amt = session.QueryOver<Advance>()
                .Where(i => i.DateOut >= StartDate && i.DateOut <= FinishDate && i.CashierOut == Cashier)
                .SelectList(k => k.SelectSum(j => j.Amount))
                .SingleOrDefault<decimal>();
                return amt;
            }
        }

        private decimal GetAdvancesReceived()
        {
            using (var session = SessionManager.Session)
            {
                var amt = session.QueryOver<Advance>()
                .Where(i => i.DateIn >= StartDate && i.DateIn <= FinishDate && i.CashierIn == Cashier)
                .SelectList(k => k.SelectSum(j => j.Amount))
                .SingleOrDefault<decimal>();
                return amt;
            }
        }
        #endregion

        public void Calculate(decimal cashDeposited, decimal retainedOvernight)
        {
            this.CashDeposited = cashDeposited;
            this.RetainedOvernight = retainedOvernight;
            Excess = CashDeposited - ClosingBalance;
            Status = string.Format("{0:Extra Cash Rs #,##0.00; Cash Short Rs #,##0.00;Cash Perfect}", Excess);
        }

        private decimal GetPrintInfo(out string info, SettleOption settleOption)
        {
            using (var session = SessionManager.Session)
            {
                Voucher voucher = null;
                decimal amount;
                decimal discount;
                info = string.Format("\n\r--- {0} ", settleOption.Display()).PadRight(44, '-');
                var list = session.QueryOver<Voucher>(() => voucher)
                    .Where(i => i.LastEditDate >= StartDate &&
                                i.LastEditDate <= FinishDate &&
                                i.User == Cashier &&
                                i.Void == false)
                    .WithSubquery.WhereExists(QueryOver.Of<VoucherSettlement>().Where(x => x.Voucher.VoucherID == voucher.VoucherID && x.Settled == settleOption).Select(x => x.Voucher))
                    .List();
                GetInfo(list, settleOption, out amount, out discount, ref info);
                return amount;
            }
        }

        //private decimal GetPending(out string info)
        //{
        //    using (var session = SessionManager.Session)
        //    {
        //        Voucher voucher = null;
        //        decimal amount;
        //        decimal discount;
        //        info = "\n\r--- Pending Bills ------------------------";
        //        var list = session.QueryOver<Voucher>(() => voucher)
        //            .Where(i => i.LastEditDate >= StartDate &&
        //                        i.LastEditDate <= FinishDate &&
        //                        i.User == Cashier &&
        //                        i.Void == false)
        //            .WithSubquery.WhereExists(QueryOver.Of<VoucherSettlement>().Where(x => x.Voucher.VoucherID == voucher.VoucherID && x.Settled == SettleOption.Unsettled).Select(x => x.Voucher))
        //            .List();
        //        GetInfo(list, SettleOption.Unsettled, out amount, out discount, ref info);
        //        return amount;
        //    }
        //}

        //private decimal GetNoCharge(out string info)
        //{
        //    using (var session = SessionManager.Session)
        //    {
        //        Voucher voucher = null;
        //        decimal amount;
        //        decimal discount;
        //        info = "\n\r--- No Charge ----------------------------";
        //        var list = session.QueryOver<Voucher>(() => voucher)
        //            .Where(i => i.LastEditDate >= StartDate &&
        //                        i.LastEditDate <= FinishDate &&
        //                        i.User == Cashier &&
        //                        i.Void == false)
        //            .WithSubquery.WhereExists(QueryOver.Of<VoucherSettlement>().Where(x => x.Voucher.VoucherID == voucher.VoucherID && x.Settled == SettleOption.NoCharge).Select(x => x.Voucher))
        //            .List();
        //        GetInfo(list, SettleOption.NoCharge, out amount, out discount, ref info);
        //        return amount;
        //    }
        //}
        //private decimal GetCashReceipts(out string info)
        //{
        //    using (var session = SessionManager.Session)
        //    {
        //        Voucher voucher = null;
        //        decimal amount;
        //        decimal discount;
        //        info = "\n\r--- Cash Settlement ----------------------";
        //        var list = session.QueryOver<Voucher>(() => voucher)
        //            .Where(i => i.LastEditDate >= StartDate &&
        //                        i.LastEditDate <= FinishDate &&
        //                        i.User == Cashier &&
        //                        i.Void == false)
        //            .WithSubquery.WhereExists(QueryOver.Of<VoucherSettlement>().Where(x => x.Voucher.VoucherID == voucher.VoucherID && x.Settled == SettleOption.Cash).Select(x => x.Voucher))
        //            .List();
        //        GetInfo(list, SettleOption.Cash, out amount, out discount, ref info);
        //        return amount;
        //    }
        //}
        //private decimal GetBillToCompany(out string info)
        //{
        //    using (var session = SessionManager.Session)
        //    {
        //        Voucher voucher = null;
        //        decimal amount;
        //        decimal discount;
        //        info = "\n\r--- Bill To Company ----------------------";
        //        var list = session.QueryOver<Voucher>(() => voucher)
        //            .Where(i => i.LastEditDate >= StartDate &&
        //                        i.LastEditDate <= FinishDate &&
        //                        i.User == Cashier &&
        //                        i.Void == false)
        //            .WithSubquery.WhereExists(QueryOver.Of<VoucherSettlement>().Where(x => x.Voucher.VoucherID == voucher.VoucherID && x.Settled == SettleOption.BillToCompany).Select(x => x.Voucher))
        //            .List();
        //        GetInfo(list, SettleOption.BillToCompany, out amount, out discount, ref info);
        //        return amount;
        //    }
        //}
        //private decimal GetCreditCard(out string info)
        //{
        //    using (var session = SessionManager.Session)
        //    {
        //        Voucher voucher = null;
        //        decimal amount;
        //        decimal discount;
        //        info = "\n\r--- Credit Card Bills --------------------";
        //        var list = session.QueryOver<Voucher>(() => voucher)
        //            .Where(i => i.LastEditDate >= StartDate &&
        //                        i.LastEditDate <= FinishDate &&
        //                        i.User == Cashier &&
        //                        i.Void == false)
        //            .WithSubquery.WhereExists(QueryOver.Of<VoucherSettlement>().Where(x => x.Voucher.VoucherID == voucher.VoucherID && x.Settled == SettleOption.CreditCard).Select(x => x.Voucher))
        //            .List();

        //        GetInfo(list, SettleOption.CreditCard, out amount, out discount, ref info);
        //        return amount;
        //    }
        //}
        private decimal GetVoids(out string info)
        {
            using (var session = SessionManager.Session)
            {
                decimal amount;
                decimal discount;
                info = "\n\r--- Void Bills ---------------------------";
                var list = (from i in session.QueryOver<Voucher>()
                            where i.LastEditDate >= StartDate &&
                            i.LastEditDate <= FinishDate &&
                            i.User == Cashier &&
                            i.Void == true
                            select i).List();
                GetInfo(list, out amount, out discount, ref info);
                return amount;
            }
        }
        private decimal GetDiscountBills(decimal disount, out string info)
        {
            using (var session = SessionManager.Session)
            {
                decimal amount;
                decimal discount;
                info = "\n\r--- High Discount Bills ------------------";
                const string query = @"
select distinct(v) from Voucher v
inner join v.Kots k
inner join k.Inventories i
where v.Date >= :startDate and v.Date <= :finishDate and v.User = :cashierID and v.Void = false
and exists (select Voucher from VoucherSettlement vs where vs.Voucher = v 
and vs.Settled != :noCharge and vs.Settled != :unSettled and vs.Settled != :amount and vs.Settled != :roundoff)
and i.Discount >= :discount";
                var list = session.CreateQuery(query)
                    .SetParameter("startDate", StartDate)
                    .SetParameter("finishDate", FinishDate)
                    .SetParameter("cashierID", Cashier.UserID)
                    .SetParameter("unSettled", SettleOption.Unsettled)
                    .SetParameter("noCharge", SettleOption.NoCharge)
                    .SetParameter("amount", SettleOption.Amount)
                    .SetParameter("roundoff", SettleOption.RoundOff)
                    .SetParameter("discount", disount)
                    .List<Voucher>();

                GetInfo(list, out amount, out discount, ref info);
                return discount;
            }
        }

        private static void GetInfo(ICollection<Voucher> list, out decimal amount, out decimal discount, ref string info)
        {
            amount = 0;
            discount = 0;
            if (list.Count == 0)
            {
                info = string.Empty;
                return;
            }
            foreach (var item in list)
            {
                var amt = item.Settlements.Where(x => x.Settled == SettleOption.Amount).Sum(x => x.Amount) * -1;
                var disc = item.Kots.Sum(x => x.Inventories.Sum(y => y.Quantity * y.Rate * y.Discount));
                info += string.Format("\n\r{0:dd-MMM-yyyy HH:mm:ss} {1} {2}", item.Date, item.BillID, item.Customer.Name);
                info += string.Format("\n\rAmount: {0:#0.00} :: Discount: {1:#0.00}", amt, disc);
                info += "\n\r------------------------------------------";
                amount += amt;
                discount += disc;
            }
        }

        private static void GetInfo(ICollection<Voucher> list, SettleOption settleOption, out decimal amount, out decimal discount, ref string info)
        {
            amount = 0;
            discount = 0;
            if (list.Count == 0)
            {
                info = string.Empty;
                return;
            }
            foreach (var item in list)
            {
                var amt = item.Settlements.Where(x => x.Settled == settleOption).Sum(x => x.Amount);
                var disc = item.Kots.Sum(x => x.Inventories.Sum(y => y.Quantity * y.Rate * y.Discount));
                info += string.Format("\n\r{0:dd-MMM-yyyy HH:mm:ss} {1} {2}", item.Date, item.BillID, item.Customer.Name);
                info += string.Format("\n\rAmount: {0:#0.00} :: Discount: {1:#0.00}", amt, disc);
                info += "\n\r------------------------------------------";
                amount += amt;
                discount += disc;
            }
        }

        private string GetActiveCashiers()
        {
            var cashiers = "";
            using (var session = SessionManager.Session)
            {
                const string query = @"
select distinct(u.Name) from Voucher v
inner join v.User u
where v.Date >= :startDate and v.Date <= :finishDate";
                var list = session.CreateQuery(query)
                    .SetParameter("startDate", StartDate)
                    .SetParameter("finishDate", FinishDate)
                    .List<string>();
                foreach (var item in list)
                    cashiers += item + ", ";
                return cashiers;
            }
        }
    }
}