<?php

declare(strict_types=1);

namespace App\Service;

use App\Entity\Actor;
use App\Entity\Movie;
use App\Entity\MovieRole;
use App\Exception\GatewayException;
use App\Gateway\TMDBGateway;
use Doctrine\ORM\EntityManagerInterface;

readonly class ActorSyncer
{
    public function __construct(
        private TMDBGateway $tmdbGateway,
        private EntityManagerInterface $em,
    ) {}

    /**
     * Fetch credits from TMDB for the given movie and create missing Actor/MovieRole entries.
     *
     * @throws GatewayException
     */
    public function syncActorsForMovie(Movie $movie): void
    {
        $creditsContext = $this->tmdbGateway->getMovieCredits($movie->getTmdbId());

        foreach ($creditsContext->cast as $actorModel) {
            $actor = $this->em->getRepository(Actor::class)->findOneBy(['tmdbId' => $actorModel->id]);
            if (!$actor instanceof Actor) {
                $actor = new Actor()
                    ->setPopularity($actorModel->popularity)
                    ->setName($actorModel->name)
                    ->setTmdbId($actorModel->id);

                $this->em->persist($actor);
            }

            $existingRole = $this->em->getRepository(MovieRole::class)->count(['actor' => $actor, 'movie' => $movie]);
            if (0 === $existingRole) {
                $role = new MovieRole()
                    ->setMovie($movie)
                    ->setActor($actor)
                    ->setCharacter($actorModel->character);

                $this->em->persist($role);
            }
        }
    }
}