using System;
using System.Collections.Generic;
using System.Linq;
using Tanshu.Accounts.Entities;
using Tanshu.Common.Helpers;
using Tanshu.Accounts.Contracts;
using Tanshu.Accounts.Repository;

namespace Tanshu.Accounts.Print
{

    public static partial class Thermal
    {
        private static string DesignBill(Guid voucherID)
        {
            using (var bi = new VoucherBI())
            {
                Voucher voucher = bi.Get(x => x.VoucherID == voucherID);
                var list = new Dictionary<int, Inventory>();
                foreach (var item in voucher.Kots.SelectMany(kot => kot.Inventories))
                {
                    int hash = item.Product.ProductID.GetHashCode();
                    hash = hash ^ item.IsHappyHour.GetHashCode();
                    foreach (var mod in item.InventoryModifier.Where(x => x.Modifier.ShowInBill))
                    {
                        hash = hash ^ mod.Modifier.ModifierID.GetHashCode();
                    }
                    if (list.ContainsKey(hash))
                        list[hash].Quantity += item.Quantity;
                    else
                        list.Add(hash, item);
                }

                var billText = "";
                billText += Header(voucher);
                billText += Products(voucher, list.Values.ToList());

                decimal amount;
                amount = list.Values.Sum(item => item.Quantity * item.Price);
                if (amount != 0)
                    billText += "\n\r" + FormatText("Total : ", 33, Align.Right) + FormatBillNum(amount, 9);

                amount = list.Values.Where(x=>x.IsHappyHour == true).Sum(item => item.Quantity * item.Price);
                if (amount != 0)
                    billText += "\n\r" + FormatText("Happy Hour Discount : ", 33, Align.Right) + FormatBillNum(amount, 9);

                amount = list.Values.Sum(item => item.Quantity * item.EffectivePrice * item.Discount);
                if (amount != 0)
                    billText += "\n\r" + FormatText("Discount : ", 33, Align.Right) + FormatBillNum(amount, 9);

                amount = list.Values.Sum(item => item.Quantity * item.EffectivePrice * (1 - item.Discount));
                if (amount != 0)
                {
                    billText += "\n\r" + FormatText("    : ", 33, Align.Right) + "---------";
                    billText += "\n\r" + FormatText("Net : ", 33, Align.Right) + FormatBillNum(amount, 9);

                }

                amount = list.Values.Sum(item => item.Quantity * item.EffectivePrice * (1 - item.Discount) * item.ServiceCharge);
                if (amount != 0)
                    billText += "\n\r" + FormatText("Service Charge : ", 33, Align.Right) + FormatBillNum(amount, 9);

                var vatList = from i in list.Values
                              group i by i.Vat into vat
                              select new
                              {
                                  Tax = vat.Key,
                                  Amount = vat.Sum(x => x.VatAmount)
                              };
                foreach (var item in vatList)
                    if (item.Amount != 0)
                        billText += "\n\r" + FormatText(item.Tax.Name, 33, Align.Right) + FormatBillNum(item.Amount, 9);

                var stList = from i in list.Values
                             group i by i.ServiceTax into serviceTax
                             select new
                             {
                                 Tax = serviceTax.Key,
                                 Amount = serviceTax.Sum(x => x.ServiceTaxAmount)
                             };
                foreach (var item in stList)
                    if (item.Amount != 0)
                        billText += "\n\r" + FormatText(item.Tax.Name, 33, Align.Right) + FormatBillNum(item.Amount, 9);

                amount = list.Values.Sum(item => item.Amount);
                if (amount != 0)
                    billText += string.Format("\n\r{0,33}{1,9:#,##0.00;(#,##0.00);0}", "Final Amount : ", Math.Round(amount, 0));

                billText += DrawLine;

                if (voucher.VoucherType == VoucherType.NoCharge || voucher.VoucherType == VoucherType.Staff)
                {
                    billText += "\n\r" + "THIS IS NOT A BILL - DON'T PAY".Center42();
                    billText += DrawLine;
                }
                if (voucher.Narration != "")
                {
                    billText += "\n\r" + FormatText(voucher.Narration, 42, Align.Centre);
                    billText += DrawLine;
                }
                if (voucher.Customer.CustomerID != Constants.CASH_CUSTOMER)
                {
                    billText += "\n\r" + voucher.Customer.Name;
                    billText += string.Format("\n\r{0}\n\r{1}", voucher.Customer.Phone, voucher.Customer.Address);
                    billText += DrawLine;
                }
                billText += "\n\r" + "Cashier : " + voucher.User.Name;
                using (var bis = new SettingBI())
                    billText += "\n\r" + bis.Get(x => x.Name == "Footer").Details;
                return billText;
            }
        }
        private static string Products(Voucher voucher, IList<Inventory> list)
        {
            string billNo;
            switch (voucher.VoucherType)
            {
                case VoucherType.NoCharge:
                    billNo = "NC-" + voucher.BillID.Value.ToString();
                    break;
                case VoucherType.Staff:
                    billNo = "ST-" + voucher.BillID.Value.ToString();
                    break;
                case VoucherType.TakeAway:
                case VoucherType.Regular:
                default:
                    billNo = (voucher.BillID.Value % 10000).ToString();
                    break;
            }


            var billText = "";
            billText += "\n\r" + string.Format("Bill No: {0,-12} {1:dd-MMM-yyyy HH:mm:ss}", billNo, voucher.Date);
            billText += "\n\r" + "Table No.: " + voucher.Table.Name;
            billText += "\n\r" + "------------------------------------------";
            billText += "\n\r" + "Qty.  Particulars            Price  Amount";
            billText += "\n\r" + "------------------------------------------";
            foreach (var item in list.Where(item => item.Quantity != 0))
            {
                billText += "\n\r" + FormatBillNum(item.Quantity, 5) + " ";
                billText += FormatText(item.EffectiveName, 22, Align.Left) + " ";
                billText += FormatBillNum(item.Price, 6) + " ";
                billText += FormatBillNum(item.Price * item.Quantity, 6);
                foreach (var mod in item.InventoryModifier.Where(x => x.Modifier.ShowInBill))
                {
                    billText += "\n\r -- " + FormatText(mod.Modifier.Name, 38, Align.Left);
                }
            }
            billText += "\n\r" + "------------------------------------------";
            return billText;
        }
        private static string Header(Voucher voucher)
        {
            var billText = "";
            using (var bi = new SettingBI())
                billText += "\n\r" + bi.Get(x => x.Name == "Header").Details;
            switch (voucher.VoucherType)
            {
                case VoucherType.Regular:
                    billText += "\n\r" + "Retail Invoice".Center42();
                    billText += "\n\r";
                    break;
                case VoucherType.NoCharge:
                    billText += "\n\r" + "NO CHARGE - THIS IS NOT A BILL - DON'T PAY".Center42();
                    billText += "\n\r";
                    break;
                case VoucherType.TakeAway:
                    billText += "\n\r" + "Retail Invoice (Delivery)".Center42();
                    billText += "\n\r";
                    break;
                case VoucherType.Staff:
                    billText += "\n\r" + "STAFF CONSUMPTION -- THIS IS NOT A BILL".Center42();
                    billText += "\n\r";
                    break;
            }
            return billText;
        }
    }
}