using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Data.SqlClient;
using Tanshu.Data.DAO;
using Tanshu.Accounts.SqlDAO;
using Tanshu.Accounts.Entities;
using Tanshu.Accounts.Entities.Auth;
using NHibernate.Criterion;
using Tanshu.Accounts.Contracts;

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 StaffReceipts { 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 NetSales { 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 StaffString { 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)
            {
                this.Cashier = UserBI.GetUser(cashier);
                this.StartDate = startDate.Date.AddHours(6);
                this.FinishDate = finishDate.Date.AddDays(1).AddHours(5);

                string info;
                PendingBills = GetPending(out info);
                PendingString = info;
                CCReceipts = GetCreditCard(out info);
                CCString = info;
                NCReceipts = GetNoCharge(out info);
                NCString = info;
                BTCReceipts = GetBillToCompany(out info);
                BTCString = info;
                StaffReceipts = GetStaffBills(out info);
                StaffString = 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();
                NetSales = GetNetSales();
                Discount = GetDiscountBills(.1M, out info);
                DiscountString = info;
                ClosingBalance = Opening
                    + Receipts
                    + AdvanceReceipts
                    - CCReceipts
                    - BTCReceipts
                    - AdvanceAdjusted
                    - CashPayments
                    - AdditionalVoids
                    + NetSales;
            }
        }

        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;
            }
        }
        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 GetPending(out string info)
        {
            using (var session = SessionManager.Session)
            {
                decimal amount;
                decimal discount;
                info = "\n\r--- Pending Bills ------------------------";
                var list = (from i in session.QueryOver<SaleVoucher>()
                            where i.LastEditDate >= StartDate &&
                            i.LastEditDate <= FinishDate &&
                            i.User == Cashier &&
                            i.Void == false &&
                            i.Settled == SettleOptionFactory.OUnsettled
                            select i).List();
                GetInfo(list, out amount, out discount, ref info);
                return amount;
            }
        }
        private decimal GetNoCharge(out string info)
        {
            using (var session = SessionManager.Session)
            {
                decimal amount;
                decimal discount;
                info = "\n\r--- No Charge ----------------------------";
                var list = (from i in session.QueryOver<SaleVoucher>()
                            where i.LastEditDate >= StartDate &&
                            i.LastEditDate <= FinishDate &&
                            i.User == Cashier &&
                            i.Void == false &&
                            i.Settled == SettleOptionFactory.ONoCharge
                            select i).List();
                GetInfo(list, out amount, out discount, ref info);
                return amount;
            }
        }
        private decimal GetBillToCompany(out string info)
        {
            using (var session = SessionManager.Session)
            {
                decimal amount;
                decimal discount;
                info = "\n\r--- Bill To Company ----------------------";
                var list = (from i in session.QueryOver<SaleVoucher>()
                            where i.LastEditDate >= StartDate &&
                            i.LastEditDate <= FinishDate &&
                            i.User == Cashier &&
                            i.Void == false &&
                            i.Settled == SettleOptionFactory.OBillToCompany
                            select i).List();
                GetInfo(list, out amount, out discount, ref info);
                return amount;
            }
        }
        private decimal GetStaffBills(out string info)
        {
            using (var session = SessionManager.Session)
            {
                decimal amount;
                decimal discount;
                info = "\n\r--- Staff Bills --------------------------";
                var list = (from i in session.QueryOver<SaleVoucher>()
                            where i.LastEditDate >= StartDate &&
                            i.LastEditDate <= FinishDate &&
                            i.User == Cashier &&
                            i.Void == false &&
                            i.Settled == SettleOptionFactory.OStaff
                            select i).List();
                GetInfo(list, out amount, out discount, ref info);
                return amount;
            }
        }
        private decimal GetCreditCard(out string info)
        {
            using (var session = SessionManager.Session)
            {
                decimal amount;
                decimal discount;
                info = "\n\r--- Credit Card Bills --------------------";
                var list = (from i in session.QueryOver<SaleVoucher>()
                            where i.LastEditDate >= StartDate &&
                            i.LastEditDate <= FinishDate &&
                            i.User == Cashier &&
                            i.Void == false &&
                            i.Settled == SettleOptionFactory.OCreditCard
                            select i).List();
                GetInfo(list, 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<SaleVoucher>()
                            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 ------------------";
                string query = @"
select distinct(v) from SaleVoucher v
inner join v.Inventories i
where v.Date >= :startDate and v.Date <= :finishDate and v.User = :cashierID and v.Void = false and v.Settled != :unSettled and v.Settled != :noCharge
and i.Discount >= :discount";
                var list = session.CreateQuery(query)
                    .SetParameter("startDate", StartDate)
                    .SetParameter("finishDate", FinishDate)
                    .SetParameter("cashierID", Cashier.UserID)
                    .SetParameter("unSettled", SettleOptionFactory.Unsettled)
                    .SetParameter("noCharge", SettleOptionFactory.NoCharge)
                    .SetParameter("discount", disount)
                    .List<SaleVoucher>();

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

        private decimal GetNetSales()
        {
            using (var session = SessionManager.Session)
            {
                decimal amount = 0;
                string query = @"
select sum(i.Amount) from SaleVoucher v
inner join v.Inventories i
where v.Date >= :startDate and v.Date <= :finishDate and v.User = :cashierID and v.Void = false and v.Settled != :unSettled and v.Settled != :noCharge";
                amount = session.CreateQuery(query)
                    .SetParameter("startDate", StartDate)
                    .SetParameter("finishDate", FinishDate)
                    .SetParameter("cashierID", Cashier.UserID)
                    .SetParameter("unSettled", SettleOptionFactory.Unsettled)
                    .SetParameter("noCharge", SettleOptionFactory.NoCharge)
                    .UniqueResult<decimal>();
                return amount;
            }
        }

        private void GetInfo(IList<SaleVoucher> 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)
            {
                decimal amt, disc;
                amt = item.Inventories.Sum(x => x.Amount);
                disc = item.Inventories.Sum(x => x.Quantity * x.Rate * x.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()
        {
            string cashiers = "";
            using (var session = SessionManager.Session)
            {
                string query = @"
select distinct(u.Name) from SaleVoucher 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;
            }
        }
    }
}