<?php

namespace App\Domain\Manga\Application\CommandHandler;

use App\Domain\Manga\Application\Command\FetchMangaChapters;
use App\Domain\Manga\Domain\Contract\Client\MangadexClientInterface;
use App\Domain\Manga\Domain\Contract\Repository\MangaRepositoryInterface;
use App\Domain\Manga\Domain\Model\Chapter;
use App\Domain\Manga\Domain\Model\ValueObject\ChapterId;
use App\Domain\Manga\Domain\Model\ValueObject\ExternalId;
use Ramsey\Uuid\Uuid;

readonly class FetchMangaChaptersHandler
{
    public function __construct(
        private MangadexClientInterface $mangadexClient,
        private MangaRepositoryInterface $mangaRepository
    ) {}

    public function handle(FetchMangaChapters $command): void
    {
        $manga = $this->mangaRepository->findByExternalId(new ExternalId($command->externalId));
        
        if ($manga === null) {
            throw new \RuntimeException('Manga not found');
        }

        $offset = 0;
        $limit = 500;
        $hasMore = true;

        while ($hasMore) {
            $feed = $this->mangadexClient->getMangaFeed(
                $command->externalId,
                $offset,
                $limit
            );

            foreach ($feed['data'] as $chapterData) {
                $chapter = new Chapter(
                    new ChapterId((string) Uuid::uuid4()),
                    $manga->getId()->getValue(),
                    (float) $chapterData['attributes']['chapter'],
                    $chapterData['attributes']['title'],
                    isset($chapterData['attributes']['volume']) ? (int) $chapterData['attributes']['volume'] : null,
                    true,
                    false,
                    new \DateTimeImmutable()
                );

                $this->mangaRepository->saveChapter($chapter);
            }

            $offset += $limit;
            $hasMore = count($feed['data']) === $limit;
        }
    }
}