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;
using NHibernate;
using NHibernate.Transform;

namespace Tanshu.Accounts.Repository
{
    public class CheckoutBI
    {
        #region Properties
        public Dictionary<SettleOption, int> amounts = new Dictionary<SettleOption, int>();
        public Dictionary<SettleOption, string> info = new Dictionary<SettleOption, string>();
        public string Cashiers { get; private set; }
        public User Cashier { get; private set; }

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

        public string Manager
        {
            get { return Session.User.Name; }
        }
        #endregion
        protected readonly ISession _session;

        public CheckoutBI(Guid cashier, DateTime startDate, DateTime finishDate)
        {
            _session = SessionManager.Session;
            StartDate = startDate.Date.AddHours(6);
            FinishDate = finishDate.Date.AddDays(1).AddHours(5);

            Cashier = _session.QueryOver<User>()
                .Where(x => x.UserID == cashier)
                .SingleOrDefault();
            Cashiers = GetActiveCashiers();
            GetBillDetails();
        }
        public void GetBillDetails()
        {
            if (FinishDate <= StartDate)
                return;
            Voucher vAlias = null;
            VoucherSettlement vsAlias = null;

            var list = _session.QueryOver<Voucher>(() => vAlias)
                .Left.JoinAlias(x => x.Settlements, () => vsAlias)
                .Where(x => x.Date >= StartDate && x.Date <= FinishDate && x.User == Cashier)
                .OrderBy(x => x.VoucherType).Asc
                .ThenBy(x => x.BillID).Asc
                .TransformUsing(Transformers.DistinctRootEntity)
                .List();

            //voidInfo = "\n\r--- Void Bills ---------------------------";
            foreach (var item in list)
            {
                if (item.Void)
                {
                    if (!amounts.ContainsKey(SettleOption.Void))
                    {
                        amounts.Add(SettleOption.Void, 0);
                        info.Add(SettleOption.Void, string.Format("\n\r--- {0} ", SettleOption.Void.Display()).PadRight(44, '-'));
                    }

                    var amount = (int)(item.Settlements.Single(x => x.Settled == SettleOption.Amount).Amount * -1);
                    amounts[SettleOption.Void] += amount;
                    info[SettleOption.Void] += string.Format("\n\r{0:dd-MMM-yyyy HH:mm:ss} {1} {2}", item.Date, item.FullBillID, item.Customer.Name);
                    info[SettleOption.Void] += string.Format("\n\rAmount: {0:#0.00}", amount);
                    info[SettleOption.Void] += "\n\r------------------------------------------";
                }
                else
                {
                    foreach (var so in item.Settlements.Where(x => x.Settled.Visible()))
                    {
                        if (!amounts.ContainsKey(so.Settled))
                        {
                            amounts.Add(so.Settled, 0);
                            info.Add(so.Settled, string.Format("\n\r--- {0} ", so.Settled.Display()).PadRight(44, '-'));
                        }
                        var amount = (int)so.Amount;
                        amounts[so.Settled] += amount;
                        info[so.Settled] += string.Format("\n\r{0:dd-MMM-yyyy HH:mm:ss} {1} {2}", item.Date, item.FullBillID, item.Customer.Name);
                        info[so.Settled] += string.Format("\n\rAmount: {0:#0.00}", amount);
                        info[so.Settled] += "\n\r------------------------------------------";
                    }
                }
            }
        }

        private string GetActiveCashiers()
        {
            var cashiers = "";
            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;
        }
    }
}