<?php

namespace App\Service;

use App\Entity\Chapter;
use App\Entity\Manga;
use App\Interface\ClientInterface;
use App\Interface\MetadataProviderInterface;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Symfony\Component\String\Slugger\SluggerInterface;

readonly class MangadexProvider implements MetadataProviderInterface
{
    public function __construct(private ClientInterface $client, private SluggerInterface $slugger)
    {
    }

    public function search(?string $title): Collection
    {
        if($title === null) {
            return new ArrayCollection();
        }

        $results = $this->client->get('/manga', [
            'title' => $title,
            'contentRating' => ['safe', 'suggestive'],
            'includes' => ['cover_art', 'author'],
            'limit' => 25
        ]);

        $mangas = [];
        foreach ($results['data'] as $result) {
            $mangas[] = (new Manga())
                ->setExternalId($result['id'])
                ->setTitle($result['attributes']['title']['en'])
                ->setSlug($this->slugger->slug($result['attributes']['title']['en'])->lower())
                ->setDescription($result['attributes']['description']['fr'] ?? $result['attributes']['description']['en'] ?? '')
                ->setPublicationYear($result['attributes']['year'])
            ;
            $tags = [];
            foreach($result['attributes']['tags'] as $tag){
                $tags[] = $tag['attributes']['name']['en'];
            }

            $mangas[count($mangas) - 1]->setGenres($tags);

            foreach($result['relationships'] as $relationship) {
                if($relationship['type'] === 'author') {
                    $mangas[count($mangas) - 1]->setAuthor($relationship['attributes']['name']);
                }

                if($relationship['type'] === 'cover_art') {
                    $mangas[count($mangas) - 1]->setImageUrl('https://mangadex.org/covers/' . $result['id'] . '/' .$relationship['attributes']['fileName']);
                }
            }
        }

        $test = array_map(fn($manga) => $manga->getExternalId(), $mangas);

        $ratings = $this->client->get('/statistics/manga', [
            'manga' => $test
        ]);

        foreach($mangas as $manga) {
            $manga->setRating($ratings['statistics'][$manga->getExternalId()]['rating']['average']);
        }

        return new ArrayCollection($mangas);
    }

    public function getFeed(Manga $manga): Manga
    {
        if($manga->getExternalId() === null) {
            return $manga;
        }

        $chapters = [];
        $page = 0;

        do {
            $results = $this->getFeedWithPagination($manga->getExternalId(), $page);
            if (isset($results['data'])) {
                $chapters = array_merge($chapters, $results['data']);
            } else {
                break;
            }
            $page++;
        } while (count($chapters) < $results['total']);

        foreach($chapters as $result) {
            $chapterNumber = (float)$result['attributes']['chapter'];

            // Utilisez la méthode exists de Doctrine pour vérifier si un chapitre avec le même numéro existe déjà
            $chapterExists = $manga->getChapters()->exists(function($key, $existingChapter) use ($chapterNumber) {
                return $existingChapter->getNumber() === $chapterNumber;
            });

            // Si le chapitre existe déjà, on skip
            if ($chapterExists) {
                continue;
            }

            // Créez et ajoutez le nouveau chapitre
            $chapter = new Chapter();
            $chapter->setNumber($chapterNumber)
                ->setTitle($result['attributes']['title'])
                ->setVolume((int)$result['attributes']['volume'] ?? null);

            $manga->addChapter($chapter);
        }

        return $manga;
    }

    private function getFeedWithPagination(string $externalId, int $page): array
    {
        return $this->client->get('/manga/' . $externalId . '/feed', [
            'limit' => 500,
            'translatedLanguage' =>['en'],
            'order' => ['chapter' => 'asc'],
            'offset' => $page * 500
        ]);
    }
}