@page "/"
@using QRCoder
@using SixLabors.ImageSharp.Formats
<PageTitle>Home</PageTitle>

<div class="modal-dialog modal-dialog-centered" role="document">
    <div class="modal-content">
        <div class="modal-header">
            <h5 class="modal-title">Create QR payment barcode</h5>
        </div>
        <div class="modal-body">
            <div class="form-group">
                <label for="input0">Name</label>
                <input type="text" class="form-control" id="input0" @bind="Name" placeholder="Enter beneficiary name">
            </div>
            <div class="form-group">
                <label for="input1">IBAN</label>
                <input type="text" class="form-control" id="input1" @bind="IBAN" placeholder="Enter IBAN">
            </div>
            <div class="form-group">
                <label for="input2">Amount</label>
                <input type="text" class="form-control" id="input2" placeholder="Enter amount in EUR" @bind="Amount">
            </div>
            <div class="form-group">
                <label for="input3">Remark</label>
                <input type="text" class="form-control" id="input3" placeholder="Enter optional remark" @bind="Remark">
            </div>
        </div>
        <div class="modal-footer">
            <button class="btn btn-primary" @onclick="@GenerateQRCode">Generate</button>
        </div>
        @if (_show)
        {
            <div class="text-center">
                <img src="@QRCodeStr" style="width:200px;height:200px" />
            </div>
        }
    </div>
</div>


@code {
    string IBAN { get; set; } = string.Empty;
    decimal Amount { get; set; } = 0;
    string Remark { get; set; } = string.Empty;
    string QRCodeStr { get; set; } = string.Empty;
    string Name { get; set; } = string.Empty;

    bool _show = false;

    public void GenerateQRCode()
    {
        QRCodeStr = string.Empty;

        if (!string.IsNullOrWhiteSpace(IBAN))
        {

            using (var ms = new MemoryStream())
            {
                QRCodeGenerator qRCodeGenerator = new QRCodeGenerator();

                var payment = new PayBySquareTextGenerator.Payment(IBAN.Replace(" ", ""), Amount, "EUR", "1", Remark);
                payment.ConstantSymbol = "0308";
                payment.BeneficiaryName = Name;

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

                // Generate QR code data
                using var qrCodeData = QRCodeGenerator.GenerateQrCode(stringData, QRCodeGenerator.ECCLevel.Q);
                using var qrCode = new PngByteQRCode(qrCodeData);
                byte[] qrCodeImage = qrCode.GetGraphic(20);

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

            _show = true;
        }
    }
}