<?php
declare(strict_types=1);

namespace App\Service;

use App\Entity\DTO\QRCode\QRCode;
use Exception;
use Psr\Log\LoggerInterface;
use Symfony\Contracts\Cache\CacheInterface;
use Symfony\Contracts\Cache\ItemInterface;


final readonly class CachedQRCodeGenerator implements QRCodeGeneratorInterface
{
    private \DateInterval $cacheDuration;

    /**
     * @throws Exception
     */
    public function __construct(private CacheableQRCodeGeneratorInterface $innerGenerator, private CacheInterface $cache, private LoggerInterface $logger, string $cacheDuration)
    {
        $this->cacheDuration = new \DateInterval($cacheDuration);
    }

    public function generateQRCodeFromEntity(QRCode $entity): string
    {
        $key = $this->innerGenerator->getCacheKey($entity);
        return $this->cache->get($key, function(ItemInterface $c) use ($entity) {
            $this->logger->debug("cache miss for key " . $c->getKey(), [
                'entity' => $entity,
            ]);

            $c->expiresAfter($this->cacheDuration);

            return $this->innerGenerator->generateQRCodeFromEntity($entity);
        });
    }
}