class MangaDex {
    constructor() {
        this.baseUrl = "https://mangadex.org";
        this.apiUrl = "https://api.mangadex.org";
        this.type = "book-board";
        this.mediaType = "manga";
        this.version = "1.1";
    }

    getHeaders() {
        return {
            'User-Agent': 'MangaDex-Client-Adapter/1.0',
            'Content-Type': 'application/json'
        };
    }

    getFilters() {
        return {
            sort: {
                label: "Sort By",
                type: "select",
                options: [
                    { value: "relevance", label: "Relevance" },
                    { value: "latestUploadedChapter", label: "Latest Upload" },
                    { value: "followedCount", label: "Most Follows" },
                    { value: "createdAt", label: "Created At" },
                    { value: "updatedAt", label: "Updated At" },
                    { value: "title", label: "Title" },
                    { value: "year", label: "Year" },
                    { value: "rating", label: "Rating" }
                ],
                default: "relevance"
            },
            status: {
                label: "Status",
                type: "multiselect",
                options: [
                    { value: "ongoing", label: "Ongoing" },
                    { value: "completed", label: "Completed" },
                    { value: "hiatus", label: "Hiatus" },
                    { value: "cancelled", label: "Cancelled" }
                ]
            },
            demographic: {
                label: "Demographic",
                type: "multiselect",
                options: [
                    { value: "shounen", label: "Shounen" },
                    { value: "shoujo", label: "Shoujo" },
                    { value: "seinen", label: "Seinen" },
                    { value: "josei", label: "Josei" },
                    { value: "none", label: "None" }
                ]
            },
            content_rating: {
                label: "Content Rating",
                type: "multiselect",
                options: [
                    { value: "safe", label: "Safe" },
                    { value: "suggestive", label: "Suggestive" },
                    { value: "erotica", label: "Erotica" },
                    { value: "pornographic", label: "Pornographic" }
                ],
                default: "safe,suggestive"
            },
            original_language: {
                label: "Original Language",
                type: "multiselect",
                options: [
                    { value: "ja", label: "Japanese" },
                    { value: "zh", label: "Chinese" },
                    { value: "ko", label: "Korean" }
                ]
            },
            tags_mode: {
                label: "Tags Mode",
                type: "select",
                options: [
                    { value: "AND", label: "AND (Match All)" },
                    { value: "OR", label: "OR (Match Any)" }
                ],
                default: "AND"
            },
            tags: {
                label: "Tags",
                type: "multiselect",
                options: [
                    // Genres
                    { value: "391b0423-d847-456f-aff0-8b0cfc03066b", label: "Action" },
                    { value: "87cc87cd-a395-47af-b27a-93258283bbc6", label: "Adventure" },
                    { value: "5920b825-4181-4a17-beeb-9918b0ff7a30", label: "Boys Love" },
                    { value: "4d32cc48-9f00-4cca-9b5a-a839f0764984", label: "Comedy" },
                    { value: "5ca48985-9a9d-4bd8-be29-80dc0303db72", label: "Crime" },
                    { value: "b9af3a63-f058-46de-a9a0-e0c13906197a", label: "Drama" },
                    { value: "cdc58593-87dd-415e-bbc0-2ec27bf404cc", label: "Fantasy" },
                    { value: "a3c67850-4684-404e-9b7f-c69850ee5da6", label: "Girls Love" },
                    { value: "33771934-028e-4cb3-8744-691e866a923e", label: "Historical" },
                    { value: "cdad7e68-1419-41dd-bdce-27753074a640", label: "Horror" },
                    { value: "ace04997-f6bd-436e-b261-779182193d3d", label: "Isekai" },
                    { value: "81c836c9-914a-4eca-981a-560dad663e73", label: "Magical Girls" },
                    { value: "50880a9d-5440-4732-9afb-8f457127e836", label: "Mecha" },
                    { value: "c8cbe35b-1b2b-4a3f-9c37-db84c4514856", label: "Medical" },
                    { value: "ee968100-4191-4968-93d3-f82d72be7e46", label: "Mystery" },
                    { value: "b1e97889-25b4-4258-b28b-cd7f4d28ea9b", label: "Philosophical" },
                    { value: "423e2eae-a7a2-4a8b-ac03-a8351462d71d", label: "Romance" },
                    { value: "256c8bd9-4904-4360-bf4f-508a76d67183", label: "Sci-Fi" },
                    { value: "e5301a23-ebd9-49dd-a0cb-2add944c7fe9", label: "Slice of Life" },
                    { value: "69964a64-2f90-4d33-beeb-f3ed2875eb4c", label: "Sports" },
                    { value: "7064a261-a137-4d3a-8848-2d385de3a99c", label: "Superhero" },
                    { value: "07251805-a27e-4d59-b488-f0bfbec15168", label: "Thriller" },
                    { value: "f8f62932-27da-4fe4-8ee1-6779a8c5edba", label: "Tragedy" },
                    { value: "acc803a4-c95a-4c22-86fc-eb6b582d82a2", label: "Wuxia" },
                    // Themes
                    { value: "e64f6742-c834-471d-8d72-dd51fc02b835", label: "Aliens" },
                    { value: "3de8c75d-8ee3-48ff-98ee-e20a65c86451", label: "Animals" },
                    { value: "ea2bc92d-1c26-4930-9b7c-d5c0dc1b6869", label: "Cooking" },
                    { value: "9ab53f92-3eed-4e9b-903a-917c86035ee3", label: "Crossdressing" },
                    { value: "da2d50ca-3018-4cc0-ac7a-6b7d472a29ea", label: "Delinquents" },
                    { value: "39730448-9a5f-48a2-85b0-a70db87b1233", label: "Demons" },
                    { value: "2bd2e8d0-f146-434a-9b51-fc9ff2c5fe6a", label: "Genderswap" },
                    { value: "3bb26d85-09d5-4d2e-880c-c34b974339e9", label: "Ghosts" },
                    { value: "fad12b5e-68ba-460e-b933-9ae8318f5b65", label: "Gyaru" },
                    { value: "aafb99c1-7f60-43fa-b75f-fc9502ce29c7", label: "Harem" },
                    { value: "5bd0e105-4481-44ca-b6e7-7544da56b1a3", label: "Incest" },
                    { value: "2d1f5d56-a1e5-4d0d-a961-2193588b08ec", label: "Loli" },
                    { value: "85daba54-a71c-4554-8a28-9901a8b0afad", label: "Mafia" },
                    { value: "a1f53773-c69a-4ce5-8cab-fffcd90b1565", label: "Magic" },
                    { value: "799c202e-7daa-44eb-9cf7-8a3c0441531e", label: "Martial Arts" },
                    { value: "ac72833b-c4e9-4878-b9db-6c8a4a99444a", label: "Military" },
                    { value: "dd1f77c5-dea9-4e2b-97ae-224af09caf99", label: "Monster Girls" },
                    { value: "36fd93ea-e8b8-445e-b836-358f02b3d33d", label: "Monsters" },
                    { value: "f42fbf9e-188a-447b-9fdc-f19dc1e4d685", label: "Music" },
                    { value: "489dd859-9b61-4c37-af75-5b18e88daafc", label: "Ninja" },
                    { value: "92d6d951-ca5e-429c-ac78-451071cbf064", label: "Office Workers" },
                    { value: "df33b754-73a3-4c54-80e6-1a74a8058539", label: "Police" },
                    { value: "9467335a-1b83-4497-9231-765337a00b96", label: "Post-Apocalyptic" },
                    { value: "3b60b75c-a2d7-4860-ab56-05f391bb889c", label: "Psychological" },
                    { value: "0bc90acb-ccc1-44ca-a34a-b9f3a73259d0", label: "Reincarnation" },
                    { value: "65761a2a-415e-47f3-bef2-a9dababba7a6", label: "Reverse Harem" },
                    { value: "81183756-1453-4c81-aa9e-f6e1b63be016", label: "Samurai" },
                    { value: "caaa44eb-cd40-4177-b930-79d3ef2afe87", label: "School Life" },
                    { value: "ddefd648-5140-4e5f-ba18-4eca4071d19b", label: "Shota" },
                    { value: "eabc5b4c-6aff-42f3-b657-3e90cbd00b75", label: "Supernatural" },
                    { value: "5fff9cde-849c-4d78-aab0-0d52b2ee1d25", label: "Survival" },
                    { value: "292e862b-2d17-4062-90a2-0356caa4ae27", label: "Time Travel" },
                    { value: "d7d1730f-6eb0-4ba6-9437-602cac38664c", label: "Vampires" },
                    { value: "9438db5a-7e2a-4ac0-b39e-e0d95a34b8a8", label: "Video Games" },
                    { value: "d14322ac-4d6f-4e9b-afd9-629d5f4d8a41", label: "Villainess" },
                    { value: "631ef465-9aba-4afb-b0fc-ea10efe274a8", label: "Zombies" },
                    // Content
                    { value: "b29d6a3d-1569-4e7a-8caf-7557bc92cd5d", label: "Gore" },
                    { value: "97893a4c-12af-4dac-b6be-0dffb353568e", label: "Sexual Violence" }
                ]
            }
        };
    }

    async search({ query = "", page = 1, filters = {} }) {
        const limit = 25;
        const offset = (page - 1) * limit;

        const url = new URL(`${this.apiUrl}/manga`);

        // --- 1. Query ---
        if (query.trim()) {
            url.searchParams.append("title", query.trim());
        }

        // --- 2. Parámetros Fijos ---
        url.searchParams.append("limit", limit.toString());
        url.searchParams.append("offset", offset.toString());
        url.searchParams.append("includes[]", "cover_art");
        url.searchParams.append("availableTranslatedLanguage[]", "en");

        // --- 3. Filtros Dinámicos ---

        // A) Content Rating (Si no se especifica, usa safe+suggestive por defecto)
        if (filters.content_rating) {
            const ratings = String(filters.content_rating).split(",");
            ratings.forEach(r => {
                if (r.trim()) url.searchParams.append("contentRating[]", r.trim());
            });
        } else {
            // Default behavior if not set
            url.searchParams.append("contentRating[]", "safe");
            url.searchParams.append("contentRating[]", "suggestive");
        }

        // B) Tags (includedTags)
        if (filters.tags) {
            const tags = String(filters.tags).split(",");
            tags.forEach(t => {
                if (t.trim()) url.searchParams.append("includedTags[]", t.trim());
            });
        }

        // C) Tag Inclusion Mode
        if (filters.tags_mode) {
            url.searchParams.append("includedTagsMode", filters.tags_mode);
        }

        // D) Status
        if (filters.status) {
            const stats = String(filters.status).split(",");
            stats.forEach(s => {
                if (s.trim()) url.searchParams.append("status[]", s.trim());
            });
        }

        // E) Demographic
        if (filters.demographic) {
            const demos = String(filters.demographic).split(",");
            demos.forEach(d => {
                if (d.trim()) url.searchParams.append("publicationDemographic[]", d.trim());
            });
        }

        // F) Original Language
        if (filters.original_language) {
            const langs = String(filters.original_language).split(",");
            langs.forEach(l => {
                if (l.trim()) url.searchParams.append("originalLanguage[]", l.trim());
            });
        }

        // G) Sort
        // MangaDex usa order[KEY]=asc/desc
        const sortVal = filters.sort || "relevance";
        const orderDir = (sortVal === "title") ? "asc" : "desc";

        // Si hay búsqueda por texto, relevance es útil, sino latestUploaded
        url.searchParams.append(`order[${sortVal}]`, orderDir);


        try {
            const response = await fetch(url.toString(), { headers: this.getHeaders() });
            if (!response.ok) {
                console.error(`MangaDex API Error: ${response.statusText}`);
                return [];
            }

            const json = await response.json();
            if (!json || !Array.isArray(json.data)) {
                return [];
            }

            return json.data.map(manga => {
                const attributes = manga.attributes;
                const titleObject = attributes.title || {};
                const title = titleObject.en || Object.values(titleObject)[0] || 'Unknown Title';

                const coverRelationship = manga.relationships?.find(rel => rel.type === 'cover_art');
                const coverFileName = coverRelationship?.attributes?.fileName;

                const coverUrl = coverFileName
                    ? `https://uploads.mangadex.org/covers/${manga.id}/${coverFileName}.256.jpg`
                    : '';

                return {
                    id: manga.id,
                    image: coverUrl,
                    title: title,
                    rating: null,
                    type: 'book'
                };
            });

        } catch (e) {
            console.error("Error during MangaDex search:", e);
            return [];
        }
    }

    async getMetadata(id) {
        try {
            const res = await fetch(`https://api.mangadex.org/manga/${id}?includes[]=cover_art`);
            if (!res.ok) throw new Error("MangaDex API error");

            const json = await res.json();
            const manga = json.data;
            const attr = manga.attributes;

            const title =
                attr.title?.en ||
                Object.values(attr.title || {})[0] ||
                "";

            const summary =
                attr.description?.en ||
                Object.values(attr.description || {})[0] ||
                "";

            const genres = manga.relationships
                ?.filter(r => r.type === "tag")
                ?.map(r =>
                    r.attributes?.name?.en ||
                    Object.values(r.attributes?.name || {})[0]
                )
                ?.filter(Boolean) || [];

            const coverRel = manga.relationships.find(r => r.type === "cover_art");
            const coverFile = coverRel?.attributes?.fileName;
            const image = coverFile
                ? `https://uploads.mangadex.org/covers/${id}/${coverFile}.512.jpg`
                : "";

            const statusMap = {
                ongoing: "Ongoing",
                completed: "Completed",
                hiatus: "Hiatus",
                cancelled: "Cancelled"
            };

            return {
                id,
                title,
                format: "Manga",
                score: 0,
                genres,
                status: statusMap[attr.status] || "",
                published: attr.year ? String(attr.year) : "???",
                summary,
                chapters: attr.lastChapter ? Number(attr.lastChapter) || 0 : 0,
                image
            };

        } catch (e) {
            console.error("MangaDex getMetadata error:", e);
            return {
                id,
                title: "",
                format: "Manga",
                score: 0,
                genres: [],
                status: "",
                published: "???",
                summary: "",
                chapters: 0,
                image: ""
            };
        }
    }

    async findChapters(mangaId) {
        if (!mangaId) return [];

        const url = `${this.apiUrl}/manga/${mangaId}/feed?translatedLanguage[]=en&order[chapter]=asc&limit=500&includes[]=scanlation_group`;

        try {
            const response = await fetch(url, { headers: this.getHeaders() });
            let chapters = [];

            if (response.ok) {
                const json = await response.json();
                if (json && Array.isArray(json.data)) {
                    const allChapters = json.data
                        .filter(ch => ch.attributes.chapter && !ch.attributes.externalUrl)
                        .map((ch, index) => ({
                            id: ch.id,
                            title: ch.attributes.title || `Chapter ${ch.attributes.chapter}`,
                            number: ch.attributes.chapter,
                            index: index,
                            language: ch.attributes.translatedLanguage
                        }));

                    const seenChapters = new Set();
                    allChapters.forEach(ch => {
                        if (!seenChapters.has(ch.chapter)) {
                            seenChapters.add(ch.chapter);
                            chapters.push(ch);
                        }
                    });

                    chapters.sort((a, b) => parseFloat(a.chapter) - parseFloat(b.chapter));
                }
            }

            return chapters;
        } catch (e) {
            console.error("Error finding MangaDex chapters:", e);
            return [];
        }
    }


    async findChapterPages(chapterId) {
        if (!chapterId) return [];
        const url = `${this.apiUrl}/at-home/server/${chapterId}`;

        try {
            const response = await fetch(url, { headers: this.getHeaders() });
            if (!response.ok) throw new Error(`Failed to fetch pages: ${response.statusText}`);

            const json = await response.json();
            if (!json || !json.baseUrl || !json.chapter) return [];

            const baseUrl = json.baseUrl;
            const chapterHash = json.chapter.hash;
            const imageFilenames = json.chapter.data;

            return imageFilenames.map((filename, index) => ({
                url: `${baseUrl}/data/${chapterHash}/${filename}`,
                index: index,
                headers: {
                    'Referer': `https://mangadex.org/chapter/${chapterId}`
                }
            }));
        } catch (e) {
            console.error("Error finding MangaDex pages:", e);
            return [];
        }
    }
}

module.exports = MangaDex;