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

namespace Tanshu.Accounts.Print
{

    public static partial class Thermal
    {
        private static string DesignBill(Voucher voucher, IDictionary<int, Inventory> list)
        {
            var billText = "";
            billText += Header(voucher);
            billText += Products(voucher, list);

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

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

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

            // Begin Service Tax and VAT Hack

            amount = SplitTax(list.Values, .13125M);
            if (amount != 0)
                billText += "\n\r" + FormatText("VAT on Food : ", 33, Align.Right) +
                            FormatBillNum(amount, 9);

            amount = SplitTax(list.Values, .1575M);
            if (amount != 0)
                billText += "\n\r" + FormatText("VAT on Liqour : ", 33, Align.Right) +
                            FormatBillNum(amount, 9);

            amount = ServiceTax(list.Values);
            if (amount != 0)
                billText += "\n\r" + FormatText("Cental Govt. ST : ", 33, Align.Right) +
                            FormatBillNum(amount, 9);

            amount = Amount(list.Values);
            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 != 1)
            {
                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 + " / " + voucher.Waiter.Name;
            billText += "\n\r" + "Call: 0172-4026666, 8054923853, 8054923856";
            return billText;
        }
        private static string Products(Voucher voucher, IDictionary<int, Inventory> list)
        {
            var billNo = voucher.BillID.Substring(voucher.BillID.IndexOf("-") + 1);

            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.TableID;
            billText += "\n\r" + "------------------------------------------";
            billText += "\n\r" + "Qty.  Particulars            Price  Amount";
            billText += "\n\r" + "------------------------------------------";
            foreach (var item in list.Values.Where(item => item.Quantity != 0))
            {
                billText += "\n\r" + FormatBillNum(item.Quantity, 5) + " ";
                billText += FormatText(Name(item.Product), 22, Align.Left) + " ";
                billText += FormatBillNum(item.FullPrice, 6) + " ";
                billText += FormatBillNum(item.FullPrice * item.Quantity, 6);
            }
            billText += "\n\r" + "------------------------------------------";
            return billText;
        }
        private static string Header(Voucher voucher)
        {
            var billText = "";
            billText += "\n\r" + "Hops n Grains".Center42();
            billText += "\n\r" + "The Microbrewery".Center42();
            billText += "\n\r" + "SCO 358, Sector 9, Panchkula".Center42();
            billText += "\n\r" + "A Unit of Peitho Foods Pvt. Ltd.".Center42();
            billText += "\n\r" + "TIN: 06592507323".Center42();
            billText += "\n\r" + "Service Tax: AAFCP5097GSD001".Center42();
            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;
        }
    }
}