namespace Inspectron.Epson.PrintServer.Printers.Utils.FinalRecipe;

public class ReceiptConverter
{
    private readonly int _lineWidth;
    private readonly int _bigFontLineWidth;

    public ReceiptConverter(int lineWidth = 42, int bigFontLineWidth = 21)
    {
        _lineWidth = lineWidth;
        _bigFontLineWidth = bigFontLineWidth;
    }

    public List<PrintCommand> ConvertToPrintCommands(FinalReceipt finalReceipt)
    {
        var commands = new List<PrintCommand>();

        // Header - Company info
        commands.Add(new PrintCommand(Center(finalReceipt.CompanyName, false)));
        commands.Add(new PrintCommand(Center(finalReceipt.Address1, false)));
        commands.Add(new PrintCommand(Center(finalReceipt.Address2, false)));
        commands.Add(new PrintCommand(Center(finalReceipt.Phone, false)));
        commands.Add(new PrintCommand(""));
        commands.Add(new PrintCommand(""));

        // FinalReceipt info
        string receiptLine = $"Rechnung Nr. {finalReceipt.ReceiptNumber}".PadRight(_lineWidth/2)+$"{finalReceipt.DateTime:HH:mm dd.MM.yyyy}".PadLeft(_lineWidth/2);
        commands.Add(new PrintCommand(receiptLine,isBold:true));
        commands.Add(new PrintCommand($"Guests: {finalReceipt.Guests}"));
        commands.Add(new PrintCommand(""));

        // Items
        foreach (var item in finalReceipt.Items)
        {
            string quantityDesc = $"{item.Quantity}x {item.Description}";
            string prices = $"{item.UnitPrice:F2}"+$"{item.TotalPrice:F2}".PadLeft(7)+$" {item.TaxCategory}";

            // Calculate spacing to align prices to the right
            int spacesNeeded = _lineWidth - quantityDesc.Length - prices.Length;
            if (spacesNeeded < 1) spacesNeeded = 1;

            string itemLine = quantityDesc + new string(' ', spacesNeeded) + prices;
            commands.Add(new PrintCommand(itemLine));
        }

        commands.Add(new PrintCommand("")); // Reini
        commands.Add(new PrintCommand("---------".PadLeft(_lineWidth)));
        commands.Add(new PrintCommand("")); //Reini

        // Total
        string totalLine = $"Summe:  {finalReceipt.Total:F2} {finalReceipt.Currency}";
        commands.Add(new PrintCommand(Center(totalLine, true), true, true));
        commands.Add(new PrintCommand(""));

        // Alternate currency
        if (finalReceipt.TotalInAlternateCurrency.HasValue)
        {
            string altCurrencyLine = $"{finalReceipt.TotalInAlternateCurrency:F2} {finalReceipt.AlternateCurrency}";
            commands.Add(new PrintCommand(altCurrencyLine.PadLeft(_lineWidth)));
            commands.Add(new PrintCommand(""));
        }

        // Payment method
        string paymentLine = $"{finalReceipt.PaymentMethod}";
        string paymentAmount = $"{finalReceipt.PaymentAmount:F2} {finalReceipt.Currency}";
        int paymentSpaces = _lineWidth - paymentLine.Length - paymentAmount.Length;
        if (paymentSpaces < 1) paymentSpaces = 1;
        commands.Add(new PrintCommand(paymentLine + new string(' ', paymentSpaces) + paymentAmount,isBold:true));
        commands.Add(new PrintCommand(""));

        // Tax breakdown
        foreach (var tax in finalReceipt.TaxBreakdown)
        {
            string taxLine = "MwSt  %".PadRight(_lineWidth/4)+"  Brutto".PadRight(_lineWidth / 4) + "  Netto".PadRight(_lineWidth / 4) + "MwSt".PadLeft(_lineWidth / 4);
            if (finalReceipt.TaxBreakdown.IndexOf(tax) == 0)
            {
                commands.Add(new PrintCommand(taxLine));
            }

            string taxDetail = ($"{tax.Category}:"+ $"{tax.Rate}%".PadLeft(5)).PadRight(_lineWidth / 4) + $"{tax.Gross:F2} {tax.Currency}".PadLeft(_lineWidth/4)+$"{tax.Net:F2} {tax.Currency}".PadLeft(_lineWidth/4)+$"{tax.TaxAmount:F2} {tax.Currency}".PadLeft(_lineWidth / 4);
            commands.Add(new PrintCommand(taxDetail));
        }
        commands.Add(new PrintCommand(""));

        // Footer info
        //commands.Add(new PrintCommand(Center($"Bedient von: {finalReceipt.WaiterName}", false)));
        //commands.Add(new PrintCommand(Center($"Terminal: {finalReceipt.Terminal}", false)));
        //commands.Add(new PrintCommand(Center($"Tisch: {finalReceipt.TableNumber}", false)));
        commands.Add(new PrintCommand($"Bedient von:".PadLeft(_lineWidth / 2) + $" {finalReceipt.WaiterName}"));
        commands.Add(new PrintCommand($"Terminal:".PadLeft(_lineWidth / 2) + $" {finalReceipt.Terminal}"));
        commands.Add(new PrintCommand($"Tisch:".PadLeft(_lineWidth / 2)+$" {finalReceipt.TableNumber}"));
        commands.Add(new PrintCommand(""));
        commands.Add(new PrintCommand(""));

        // VAT number
        commands.Add(new PrintCommand(Center(finalReceipt.VatNumber, false)));

        // Thank you message
        commands.Add(new PrintCommand(Center(finalReceipt.ThankYouMessage, false)));
        commands.Add(new PrintCommand(Center(finalReceipt.GoodbyeMessageLine1, false)));
        commands.Add(new PrintCommand(Center(finalReceipt.GoodbyeMessageLine2, false)));

        return commands;
    }

    private string Center(string text, bool isBigFont)
    {
        int effectiveLineWidth = isBigFont ? _bigFontLineWidth : _lineWidth;

        if (string.IsNullOrEmpty(text) || text.Length >= effectiveLineWidth)
            return text;

        int totalPadding = effectiveLineWidth - text.Length;
        int leftPadding = totalPadding / 2;

        return new string(' ', leftPadding) + text;
    }
}