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

namespace Tanshu.Accounts.Repository
{
    public class ReportsBI
    {
        public IList<SalesAnalysisDetail> SaleQuantity(DateTime startDate, DateTime finishDate)
        {
            startDate = startDate.Date.AddHours(6);
            finishDate = finishDate.Date.AddDays(1).AddHours(5);
            if (finishDate <= startDate)
                return new List<SalesAnalysisDetail>();

            using (var session = SessionManager.Session)
            {
                const string query = @"
select p.ProductID, p.FullName, i.IsHappyHour, Sum(i.Quantity)
from Voucher v 
inner join v.Kots k
inner join k.Inventories i
inner join i.Product p
inner join p.ProductGroup pg
where v.Date >= :startDate and v.Date <= :finishDate and v.Void = false
and exists (select Voucher from VoucherSettlement vs where vs.Voucher = v 
and vs.Settled in (:cash, :creditCard, :billToCompany, :staff))
group by p.ProductID, p.FullName, i.IsHappyHour, p.ProductGroup, pg.GroupType
order by pg.GroupType, p.ProductGroup, p.FullName, i.IsHappyHour
";
                var list = session
                   .CreateQuery(query)
                   .SetParameter("startDate", startDate)
                   .SetParameter("finishDate", finishDate)
                    .SetParameter("cash", SettleOption.Cash)
                   .SetParameter("creditCard", SettleOption.CreditCard)
                   .SetParameter("billToCompany", SettleOption.BillToCompany)
                   .SetParameter("staff", SettleOption.Staff)
                   .List<object[]>();
                var outList = new List<SalesAnalysisDetail>();
                foreach (var item in list)
                    outList.Add(new SalesAnalysisDetail() { ProductID = (Guid)item[0], Name = (string)item[1], IsHappyHour = (bool)item[2], Sale = (decimal)item[3] });
                return outList;
            }
        }
        public IList<SalesAnalysisDetail> NcQuantity(DateTime startDate, DateTime finishDate)
        {
            startDate = startDate.Date.AddHours(6);
            finishDate = finishDate.Date.AddDays(1).AddHours(5);
            if (finishDate <= startDate)
                return new List<SalesAnalysisDetail>();

            using (var session = SessionManager.Session)
            {
                const string query = @"
        select p.ProductID, p.FullName, i.IsHappyHour, Sum(i.Quantity)
        from Voucher v 
        inner join v.Kots k
        inner join k.Inventories i
        inner join i.Product p
        where v.Date >= :startDate and v.Date <= :finishDate and v.Void = false
        and exists (select Voucher from VoucherSettlement vs where vs.Voucher = v and vs.Settled = :noCharge)
        group by p.ProductID, p.FullName, i.IsHappyHour
";
                var list = session
                   .CreateQuery(query)
                   .SetParameter("startDate", startDate)
                   .SetParameter("finishDate", finishDate)
                   .SetParameter("noCharge", SettleOption.NoCharge)
                   .List<object[]>(); var outList = new List<SalesAnalysisDetail>();
                foreach (var item in list)
                    outList.Add(new SalesAnalysisDetail() { ProductID = (Guid)item[0], Name = (string)item[1], IsHappyHour = (bool)item[2], NC = (decimal)item[3] });
                return outList;
            }
        }

        public IList<BillDetail> GetBillDetails(DateTime startDate, DateTime finishDate)
        {
            startDate = startDate.Date.AddHours(6);
            finishDate = finishDate.Date.AddDays(1).AddHours(5);
            if (finishDate <= startDate)
                return new List<BillDetail>();
            using (var session = SessionManager.Session)
            {
                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)
                    .OrderBy(x => x.VoucherType).Asc
                    .ThenBy(x => x.BillID).Asc
                    .TransformUsing(Transformers.DistinctRootEntity)
                    .List();

                var outList = new List<BillDetail>();
                foreach (var item in list)
                {
                    if (item.Void)
                        outList.Add(new BillDetail()
                        {
                            Date = item.Date,
                            BillID = item.FullBillID,
                            Settlement = string.Format("Void: {0}", item.VoidReason),
                            Amount = Math.Round(item.Settlements.Single(x => x.Settled == SettleOption.Amount).Amount * -1, 2)
                        });

                    else
                    {
                        foreach (var so in item.Settlements.Where(x => x.Settled.Visible()))
                        {
                            outList.Add(new BillDetail()
                            {
                                Date = item.Date,
                                BillID = item.FullBillID,
                                Settlement = so.Settled.Display(),
                                Amount = Math.Round(so.Amount, 2)
                            });
                        }
                    }
                }
                return outList;
            }
        }
        public IList<SalesAnalysis> DiscountReport(DateTime startDate, DateTime finishDate)
        {
            startDate = startDate.Date.AddHours(6);
            finishDate = finishDate.Date.AddDays(1).AddHours(5);
            if (finishDate <= startDate)
                return new List<SalesAnalysis>();
            using (var session = SessionManager.Session)
            {
                const string query = @"
select pg.GroupType, sum(i.Quantity * i.EffectivePrice * i.Discount) 
from Inventory i
inner join i.Kot k
inner join k.Voucher v
inner join i.Product p
inner join p.ProductGroup pg
where v.Date >= :startDate and v.Date <= :finishDate and i.Discount != 0
and v not in (select Voucher from VoucherSettlement vs where vs.Voucher = v and (vs.Settled = :noCharge or vs.Settled = :staff))
group by pg.GroupType
order by pg.GroupType
";
                var list = session
                   .CreateQuery(query)
                   .SetParameter("startDate", startDate)
                   .SetParameter("finishDate", finishDate)
                   .SetParameter("noCharge", SettleOption.NoCharge)
                   .SetParameter("staff", SettleOption.Staff)
                   .List<object[]>();
                return list.Select(item => new SalesAnalysis()
                                               {
                                                   GroupType = (string)item[0],
                                                   Amount = (decimal)item[1]
                                               }).ToList();
            }
        }
        public IList<BillDetail> VoidOrReprintedBillsList(DateTime startDate, DateTime finishDate)
        {
            startDate = startDate.Date.AddHours(6);
            finishDate = finishDate.Date.AddDays(1).AddHours(5);
            if (finishDate <= startDate)
                return new List<BillDetail>();
            using (var session = SessionManager.Session)
            {
                Voucher vAlias = null;
                VoucherSettlement vsAlias = null;
                ICriterion amount = Restrictions.Where<VoucherSettlement>(x => x.Settled == SettleOption.Amount);

                var listVoids = session.QueryOver<Voucher>(() => vAlias)
                    .Left.JoinAlias(x => x.Settlements, () => vsAlias, amount)
                    .Where(x => x.Date >= startDate && x.Date <= finishDate && x.Void == true)
                    .OrderBy(x => x.VoucherType).Asc
                    .ThenBy(x => x.BillID).Asc
                    .TransformUsing(Transformers.DistinctRootEntity)
                    .List();

                var outList = new List<BillDetail>();
                foreach (var item in listVoids)
                {
                    outList.Add(new BillDetail()
                    {
                        Date = item.Date,
                        BillID = item.FullBillID,
                        Settlement = string.Format("Void: {0}", item.VoidReason),
                        Amount = Math.Round(item.Settlements.SingleOrDefault().Amount * -1, 2)
                    });
                }
                var listReprint = session.QueryOver<Reprint>()
                    .Where(x => x.Date >= startDate && x.Date <= finishDate)
                    .List();
                foreach (var item in listReprint)
                {
                    outList.Add(new BillDetail()
                    {
                        Date = item.Date,
                        BillID = item.Voucher.FullBillID,
                        Settlement = string.Format("Reprinted by {0}", item.User.Name),
                        Amount = item.Voucher.Settlements.Single(x => x.Settled == SettleOption.Amount).Amount * -1
                    });
                }

                return outList;
            }
        }
    }
}