class nhentai {
  constructor() {
    this.baseUrl = "https://nhentai.net";
    this.type = "book-board";
    this.mediaType = "manga";
    this.version = "1.0"
  }

  async search(queryObj) {
    const q = queryObj.query.trim().replace(/\s+/g, "+");
    const url = q
      ? `${this.baseUrl}/search/?q=${q}`
      : `${this.baseUrl}/?q=`;

    const { result: data } = await this.scrape(
      url,
      async (page) => {
        return page.evaluate(() => {
          const container = document.querySelector('.container.index-container');
          if (!container) return {results: [], hasNextPage: false};

          const galleryEls = container.querySelectorAll('.gallery');
          const results = [];

          galleryEls.forEach(el => {
            const a = el.querySelector('a.cover');
            if (!a) return;

            const href = a.getAttribute('href');
            const id = href.match(/\d+/)?.[0] || null;

            const img = a.querySelector('img.lazyload');
            const thumbRaw = img?.dataset?.src || img?.src || "";
            const thumb = thumbRaw.startsWith("//") ? "https:" + thumbRaw : thumbRaw;
            const coverUrl = thumb.replace("thumb", "cover");

            const caption = a.querySelector('.caption');
            const title = caption?.textContent.trim() || "";

            results.push({
              id,
              title,
              image: coverUrl,
              rating: null,
              type: "book"
            });
          });

          const hasNextPage = !!document.querySelector('section.pagination a.next');
          return {results, hasNextPage};
        });
      },
      {
        waitSelector: '.container.index-container',
        timeout: 55000
      }
    );

    return data?.results || [];
  }

  async getMetadata(id) {
    const { result: data } = await this.scrape(
      `${this.baseUrl}/g/${id}/`,
      async (page) => {
        return page.evaluate(() => {
          const title = document.querySelector('h1.title .pretty')?.textContent?.trim() || "";

          const img = document.querySelector('#cover img');
          const image =
              img?.dataset?.src ? "https:" + img.dataset.src :
                  img?.src?.startsWith("//") ? "https:" + img.src :
                      img?.src || "";

          const tagBlock = document.querySelector('.tag-container.field-name');
          const genres = tagBlock
              ? [...tagBlock.querySelectorAll('.tags .name')].map(x => x.textContent.trim())
              : [];

          const timeEl = document.querySelector('.tag-container.field-name time');
          const published =
              timeEl?.getAttribute("datetime") ||
              timeEl?.textContent?.trim() ||
              "???";

          return {title, image, genres, published};
        });
      },
      {
        waitSelector: "#bigcontainer",
        timeout: 55000
      }
    );

    if (!data) throw new Error(`Fallo al obtener metadatos para ID ${id}`);

    const formattedDate = data.published
      ? new Date(data.published).toLocaleDateString("es-ES")
      : "???";

    return {
      id,
      title: data.title || "",
      format: "Manga",
      score: 0,
      genres: Array.isArray(data.genres) ? data.genres : [],
      status: "Finished",
      published: formattedDate,
      summary: "",
      chapters: 1,
      image: data.image || ""
    };
  }

  async findChapters(mangaId) {
    const { result: data } = await this.scrape(
      `${this.baseUrl}/g/${mangaId}/`,
      async (page) => {
        return page.evaluate(() => {
          const title = document.querySelector('#info > h1 .pretty')?.textContent?.trim() || "";

          const img = document.querySelector('#cover img');
          const cover =
              img?.dataset?.src ? "https:" + img.dataset.src :
                  img?.src?.startsWith("//") ? "https:" + img.src :
                      img?.src || "";

          const hash = cover.match(/galleries\/(\d+)\//)?.[1] || null;

          const thumbs = document.querySelectorAll('.thumbs img');
          const pages = thumbs.length;

          const first = thumbs[0];
          const s = first?.dataset?.src || first?.src || "";
          const ext = s.match(/t\.(\w+)/)?.[1] || "jpg";

          const langTag = [...document.querySelectorAll('#tags .tag-container')]
              .find(x => x.textContent.includes("Languages:"));

          const language = langTag?.querySelector('.tags .name')?.textContent?.trim() || "";

          return {title, cover, hash, pages, ext, language};
        });
      },
      {
        waitSelector: '#bigcontainer',
        timeout: 55000
      }
    );

    if (!data?.hash) throw new Error(`Fallo al obtener hash para ID ${mangaId}`);

    const encodedChapterId = Buffer.from(JSON.stringify({
      hash: data.hash,
      pages: data.pages,
      ext: data.ext
    })).toString("base64");

    return [{
      id: encodedChapterId,
      title: data.title,
      number: 1,
      releaseDate: null,
      index: 0,
    }];
  }

  async findChapterPages(chapterId) {
    const decoded = JSON.parse(Buffer.from(chapterId, "base64").toString("utf8"));

    const { hash, pages, ext } = decoded;
    const baseUrl = "https://i.nhentai.net/galleries";

    return Array.from({ length: pages }, (_, i) => ({
      url: `${baseUrl}/${hash}/${i + 1}.${ext}`,
      index: i,
      headers: { Referer: `https://nhentai.net/g/${hash}/` }
    }));
  }
}

module.exports = nhentai;