using QRCoder;
using QRPay.Models;

namespace QRPay.Services;

public static class PaymentQrCodeService
{
    public static string GenerateDataUri(PaymentRequest paymentRequest)
    {
        var payment = new PayBySquareTextGenerator.Payment(
            paymentRequest.NormalizedIBAN,
            paymentRequest.Amount ?? 0m,
            "EUR",
            "1",
            paymentRequest.Remark ?? string.Empty);

        payment.ConstantSymbol = "0308";

        if (!string.IsNullOrWhiteSpace(paymentRequest.Name))
        {
            payment.BeneficiaryName = paymentRequest.Name;
        }

        var payBySquare = new PayBySquareTextGenerator.PayBySquareOverkill(payment);
        var stringData = payBySquare.GeneratePayBySquareOverkillString();

        using var qrCodeData = QRCodeGenerator.GenerateQrCode(stringData, QRCodeGenerator.ECCLevel.Q);
        using var qrCode = new PngByteQRCode(qrCodeData);
        var qrCodeImage = qrCode.GetGraphic(10);

        return $"data:image/png;base64,{Convert.ToBase64String(qrCodeImage)}";
    }
}