<?php

namespace App\Services;

use BaconQrCode\Common\ErrorCorrectionLevel;
use BaconQrCode\Encoder\Encoder;
use BaconQrCode\Renderer\Color\Rgb;
use BaconQrCode\Renderer\Image\SvgImageBackEnd;
use BaconQrCode\Renderer\ImageRenderer;
use BaconQrCode\Renderer\RendererStyle\Fill;
use BaconQrCode\Renderer\RendererStyle\RendererStyle;
use BaconQrCode\Writer;

class QrCodeService
{
    /**
     * The QR code's width and height in the SVG, in pixels: the size a canvas draws it at.
     */
    public const SIZE = 1024;

    /**
     * Draw the contents as a QR code in SVG: black on white with a four-module quiet zone and
     * error correction M, the most reliable to scan from a screen or a print. The XML declaration
     * is dropped so the markup can sit inline in a page.
     */
    public function svg(string $contents): string
    {
        $svg = (new Writer(
            new ImageRenderer(
                new RendererStyle(self::SIZE, 4, null, null, Fill::uniformColor(new Rgb(255, 255, 255), new Rgb(0, 0, 0))),
                new SvgImageBackEnd,
            ),
        ))->writeString($contents, Encoder::DEFAULT_BYTE_MODE_ENCODING, ErrorCorrectionLevel::M());

        return trim(substr($svg, strpos($svg, "\n") + 1));
    }
}