<?php

namespace App\Services;

use BaconQrCode\Renderer\Image\SvgImageBackEnd;
use BaconQrCode\Renderer\ImageRenderer;
use BaconQrCode\Renderer\RendererStyle\RendererStyle;
use BaconQrCode\Writer;
use PragmaRX\Google2FA\Google2FA;

class AdminGoogle2fa
{
    private readonly Google2FA $google2fa;

    public function __construct(?Google2FA $google2fa = null)
    {
        $this->google2fa = $google2fa ?? new Google2FA;
    }

    public function generateSecret(): string
    {
        return $this->google2fa->generateSecretKey();
    }

    public function verify(string $secret, string $code): bool
    {
        $code = trim($code);
        if ($secret === '' || $code === '') {
            return false;
        }

        return (bool) $this->google2fa->verifyKey($secret, $code);
    }

    public function otpAuthUrl(string $username, string $secret, string $label = 'admin'): string
    {
        $issuer = (string) config('app.name', 'Coruna Lab');

        return $this->google2fa->getQRCodeUrl($issuer, $username.'@'.$label, $secret);
    }

    public function qrSvg(string $otpAuthUrl, int $size = 200): string
    {
        $writer = new Writer(new ImageRenderer(
            new RendererStyle($size),
            new SvgImageBackEnd
        ));

        return $writer->writeString($otpAuthUrl);
    }
}