<?php

declare(strict_types=1);

/*
 * Chill is a software for social workers
 *
 * For the full copyright and license information, please view
 * the LICENSE file that was distributed with this source code.
 */

namespace Chill\DocStoreBundle\Workflow;

use Chill\DocStoreBundle\Service\StoredObjectToPdfConverter;
use Chill\MainBundle\Entity\Workflow\EntityWorkflow;
use Chill\MainBundle\Workflow\EntityWorkflowManager;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpFoundation\RequestStack;
use Symfony\Component\Workflow\Event\CompletedEvent;
use Symfony\Component\Workflow\WorkflowEvents;

/**
 * Event subscriber to convert objects to PDF when the document reach a signature step.
 */
class ConvertToPdfBeforeSignatureStepEventSubscriber implements EventSubscriberInterface
{
    public function __construct(
        private readonly EntityWorkflowManager $entityWorkflowManager,
        private readonly StoredObjectToPdfConverter $storedObjectToPdfConverter,
        private readonly RequestStack $requestStack,
    ) {}

    public static function getSubscribedEvents(): array
    {
        return [
            WorkflowEvents::COMPLETED => 'convertToPdfBeforeSignatureStepEvent',
        ];
    }

    public function convertToPdfBeforeSignatureStepEvent(CompletedEvent $event): void
    {
        $entityWorkflow = $event->getSubject();
        if (!$entityWorkflow instanceof EntityWorkflow) {
            return;
        }

        $tos = $event->getTransition()->getTos();
        $workflow = $event->getWorkflow();
        $metadataStore = $workflow->getMetadataStore();

        foreach ($tos as $to) {
            $metadata = $metadataStore->getPlaceMetadata($to);
            if (array_key_exists('isSignature', $metadata) && 0 < count($metadata['isSignature'])) {
                $this->convertToPdf($entityWorkflow);

                return;
            }
        }
    }

    private function convertToPdf(EntityWorkflow $entityWorkflow): void
    {
        $storedObject = $this->entityWorkflowManager->getAssociatedStoredObject($entityWorkflow);

        if (null === $storedObject) {
            return;
        }

        if ('application/pdf' === $storedObject->getCurrentVersion()->getType()) {
            return;
        }

        $this->storedObjectToPdfConverter->addConvertedVersion($storedObject, $this->requestStack->getCurrentRequest()->getLocale(), 'pdf');
    }
}