console.log("[HiAnime-TV] source.js loaded");

class HiAnime {
  constructor() {
    console.log("[HiAnime-TV] constructor()");
    this.type = "anime-board";
    this.version = "1.0";
    this.baseUrl = "https://hianime.to";
  }

  getSettings() {
    console.log("[HiAnime-TV] getSettings()");
    return {
      episodeServers: ["HD-1", "HD-2", "HD-3", "HD-4"],
      supportsDub: true
    };
  }

  safeString(str) {
    return (typeof str === "string" ? str : "");
  }

  normalizeSeasonParts(title) {
    const s = this.safeString(title);
    return s.toLowerCase()
      .replace(/[^a-z0-9]+/g, "")
      .replace(/\d+(st|nd|rd|th)/g, (m) => m.replace(/st|nd|rd|th/, ""))
      .replace(/season|cour|part/g, "");
  }

  _decodeHtml(s) {
    return this.safeString(s)
      .replace(/&/g, "&")
      .replace(/"/g, '"')
      .replace(/'/g, "'")
      .replace(/'/g, "'")
      .replace(/&lt;/g, "<")
      .replace(/&gt;/g, ">")
      .replace(/&#(\d+);?/g, (m, d) => {
        const n = parseInt(d, 10);
        return Number.isFinite(n) ? String.fromCharCode(n) : m;
      });
  }

  _normalize(str) {
    return this.safeString(str).toLowerCase().replace(/[^a-z0-9]+/g, "");
  }

  _escapeRe(s) {
    return this.safeString(s).replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
  }

  _fetch(url, opts) {
    const o = opts || {};
    const headers = Object.assign(
      {
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36",
        "Accept": "text/html,application/json;q=0.9,*/*;q=0.8",
        "Referer": this.baseUrl + "/"
      },
      o.headers || {}
    );
    const method = o.method || "GET";
    const body = (o.body === undefined || o.body === null) ? "" : String(o.body);

    console.log("[HiAnime-TV] fetch", method, url, "headers=", Object.keys(headers).length, "bodyLen=", body.length);
    const r = fetch(url, { method, headers, body });
    console.log("[HiAnime-TV] fetchResp status=", r.status, "ok=", r.ok);
    return r;
  }

  search(query) {
    console.log("[HiAnime-TV] search() raw=", query);

    try {
      let q = query;

      if (typeof q === "string") {
        try { q = JSON.parse(q); }
        catch (e) { q = { query: query, dub: false, media: { startDate: {} } }; }
      }

      q = q || {};
      const queryText = this.safeString(q.query || q.title);
      const dub = !!q.dub;

      const start = (q.media && q.media.startDate) ? q.media.startDate : {};
      const year = start.year || "";
      const month = start.month || "";

      console.log("[HiAnime-TV] search() parsed queryText=", queryText, "dub=", dub, "year=", year, "month=", month);

      if (!queryText) return [];

      const normalize = (str) => this._normalize(str);
      const fetchMatches = (url) => {
        console.log("[HiAnime-TV] search() fetchMatches url=", url);
        const html = this._fetch(url).text();
        console.log("[HiAnime-TV] search() htmlLen=", (html || "").length);

        const regex = /<a href="\/watch\/([^"]+)"[^>]+title="([^"]+)"[^>]+data-id="(\d+)"/g;
        const all = [...html.matchAll(regex)];

        console.log("[HiAnime-TV] search() matchAll count=", all.length);

        return all.map(m => {
          const id = m[3];
          const pageUrl = m[1];
          const title = this._decodeHtml(m[2]);

          const jnameRegex = new RegExp(
            `<h3 class="film-name">[\\s\\S]*?<a[^>]+href="\\/${this._escapeRe(pageUrl)}[^"]*"[^>]+data-jname="([^"]+)"`,
            "i"
          );
          const jnameMatch = html.match(jnameRegex);
          const jname = jnameMatch ? this._decodeHtml(jnameMatch[1]) : null;

          const imageRegex = new RegExp(
            `<a href="/watch/${this._escapeRe(pageUrl)}"[\\s\\S]*?<img[^>]+data-src="([^"]+)"`,
            "i"
          );
          const imageMatch = html.match(imageRegex);
          const image = imageMatch ? imageMatch[1] : null;

          const normTitleJP = normalize(this.normalizeSeasonParts(jname));
          const normTitle = normalize(this.normalizeSeasonParts(title));

          return { id, pageUrl, title, image, normTitleJP, normTitle };
        });
      };

      let url = `${this.baseUrl}/search?keyword=${encodeURIComponent(queryText)}&sort=default`;
      if (year) url += `&sy=${year}`;
      if (month) url += `&sm=${month}`;

      console.log("[HiAnime-TV] search() url=", url);

      const matches = fetchMatches(url);
      if (!matches || matches.length === 0) {
        console.log("[HiAnime-TV] search() 0 matches");
        return [];
      }

      const out = matches.map(m => ({
        id: `${m.id}/${dub ? "dub" : "sub"}`,
        title: m.title,
        image: m.image,
        url: `${this.baseUrl}/${m.pageUrl}`,
        subOrDub: dub ? "dub" : "sub"
      }));

      console.log("[HiAnime-TV] search() returning=", out.length, "first=", out[0] ? out[0].title : "none");
      return out;
    } catch (e) {
      console.error("[HiAnime-TV] search() ERROR", String(e), e && e.stack ? e.stack : "");
      throw e;
    }
  }

  findEpisodes(animeId) {
    console.log("[HiAnime-TV] findEpisodes() animeId=", animeId);
    try {
      let raw = animeId;
      if (typeof raw !== "string") raw = JSON.stringify(raw);

      let id = "";
      let subOrDub = "sub";

      if (raw.includes("/")) {
        const parts = raw.split("/");
        id = parts[0];
        subOrDub = parts[1] || "sub";
      } else {
        try {
          const parsed = JSON.parse(raw);
          const v = parsed.id || parsed.animeId || raw;
          if (String(v).includes("/")) {
            const parts = String(v).split("/");
            id = parts[0];
            subOrDub = parts[1] || (parsed.subOrDub || "sub");
          } else {
            id = String(v);
            subOrDub = parsed.subOrDub || "sub";
          }
        } catch (e) {
          id = raw;
        }
      }

      console.log("[HiAnime-TV] findEpisodes() parsed id=", id, "subOrDub=", subOrDub);

      const url = `${this.baseUrl}/ajax/v2/episode/list/${id}`;
      const res = this._fetch(url, { headers: { "X-Requested-With": "XMLHttpRequest" } });
      const json = res.json();
      const html = this.safeString(json.html);

      console.log("[HiAnime-TV] findEpisodes() status=", res.status, "ok=", res.ok, "htmlLen=", html.length);

      const episodes = [];
      const regex = /<a[^>]*class="[^"]*\bep-item\b[^"]*"[^>]*data-number="(\d+)"[^>]*data-id="(\d+)"[^>]*href="([^"]+)"[\s\S]*?<div class="ep-name[^"]*"[^>]*title="([^"]+)"/g;

      let match;
      while ((match = regex.exec(html)) !== null) {
        episodes.push({
          id: `${match[2]}/${subOrDub}`,
          number: parseInt(match[1], 10),
          url: this.baseUrl + match[3],
          title: this._decodeHtml(match[4])
        });
      }

      console.log("[HiAnime-TV] findEpisodes() returning=", episodes.length, "firstEp=", episodes[0] ? episodes[0].number : "none");
      return episodes;
    } catch (e) {
      console.error("[HiAnime-TV] findEpisodes() ERROR", String(e), e && e.stack ? e.stack : "");
      throw e;
    }
  }

  findEpisodeServer(episode, _server) {
    console.log("[HiAnime-TV] findEpisodeServer() episode=", episode, "server=", _server);
    try {
      let ep = episode;

      if (typeof ep === "string") {
        try { ep = JSON.parse(ep); } catch (e) {}
      }

      let episodeId = "";
      let subOrDub = "sub";

      if (typeof ep === "string") {
        const raw = ep;
        if (raw.includes("/")) {
          const parts = raw.split("/");
          episodeId = parts[0];
          subOrDub = parts[1] || "sub";
        } else {
          episodeId = raw;
        }
      } else if (ep && typeof ep === "object") {
        const rawId = ep.id || ep.episodeId || "";
        if (String(rawId).includes("/")) {
          const parts = String(rawId).split("/");
          episodeId = parts[0];
          subOrDub = parts[1] || (ep.subOrDub || "sub");
        } else {
          episodeId = String(rawId);
          subOrDub = ep.subOrDub || "sub";
        }
      }

      if (!episodeId) throw new Error("Missing episode id");

      let serverName = (_server && _server !== "default") ? String(_server) : "HD-1";
      console.log("[HiAnime-TV] parsed episodeId=", episodeId, "subOrDub=", subOrDub, "serverName=", serverName);

      if (serverName === "HD-1" || serverName === "HD-2" || serverName === "HD-3") {

        const serversUrl = `${this.baseUrl}/ajax/v2/episode/servers?episodeId=${episodeId}`;
        console.log("[HiAnime-TV] serversUrl=", serversUrl);

        const serverJson = this._fetch(serversUrl, { headers: { "X-Requested-With": "XMLHttpRequest" } }).json();
        const serverHtml = this.safeString(serverJson.html);

        console.log("[HiAnime-TV] serverHtmlLen=", serverHtml.length);

        const regex = new RegExp(
          `<div[^>]*class="item server-item"[^>]*data-type="${this._escapeRe(subOrDub)}"[^>]*data-id="(\\d+)"[^>]*>\\s*<a[^>]*>\\s*${this._escapeRe(serverName)}\\s*</a>`,
          "i"
        );

        const m = regex.exec(serverHtml);
        if (!m) throw new Error(`Server "${serverName}" (${subOrDub}) not found`);

        const serverId = m[1];
        console.log("[HiAnime-TV] serverId=", serverId);

        const sourcesUrl = `${this.baseUrl}/ajax/v2/episode/sources?id=${serverId}`;
        console.log("[HiAnime-TV] sourcesUrl=", sourcesUrl);

        const sourcesJson = this._fetch(sourcesUrl, { headers: { "X-Requested-With": "XMLHttpRequest" } }).json();
        console.log("[HiAnime-TV] sourcesJson has link=", !!sourcesJson.link);

        let decryptData = null;
        let requiredHeaders = {};

        try {
          decryptData = this.extractMegaCloud(sourcesJson.link, true);
          if (decryptData && decryptData.headersProvided) requiredHeaders = decryptData.headersProvided;
          console.log("[HiAnime-TV] extractMegaCloud ok sources=", (decryptData && decryptData.sources ? decryptData.sources.length : 0));
        } catch (err) {
          console.warn("[HiAnime-TV] Primary decrypter failed:", String(err));
        }

        if (!decryptData) {
          console.warn("[HiAnime-TV] Trying fallback decrypt...");
          const fallbackUrl = `https://ac-api.ofchaos.com/api/anime/embed/convert/v2?embedUrl=${encodeURIComponent(sourcesJson.link)}`;
          console.log("[HiAnime-TV] fallbackUrl=", fallbackUrl);

          const fallbackRes = this._fetch(fallbackUrl);
          decryptData = fallbackRes.json();

          requiredHeaders = {
            "Referer": "https://megacloud.club/",
            "Origin": "https://megacloud.club",
            "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36",
            "X-Requested-With": "XMLHttpRequest"
          };

          console.log("[HiAnime-TV] fallback decrypt sources=", (decryptData && decryptData.sources ? decryptData.sources.length : 0));
        }

        const sourcesArr = (decryptData && decryptData.sources) ? decryptData.sources : [];
        const streamSource =
          sourcesArr.find((s) => s && s.type === "hls" && s.file) ||
          sourcesArr.find((s) => s && s.type === "mp4" && s.file);

        if (!streamSource || !streamSource.file) throw new Error("No valid stream file found");

        const subtitles = (decryptData.tracks || [])
          .filter((t) => t && t.kind === "captions" && t.file)
          .map((track, index) => ({
            id: `sub-${index}`,
            language: track.label || "Unknown",
            url: track.file,
            isDefault: !!track.default
          }));

        console.log("[HiAnime-TV] FINAL stream file=", streamSource.file, "type=", streamSource.type, "subs=", subtitles.length);

        return {
          server: serverName,
          headers: requiredHeaders,
          videoSources: [{
            url: streamSource.file,
            type: streamSource.type === "hls" ? "m3u8" : "mp4",
            quality: "auto",
            subtitles
          }]
        };
      }

      if (serverName === "HD-4") {
        console.warn("[HiAnime-TV] HD-4 not implemented");
        return null;
      }

      console.warn("[HiAnime-TV] Unsupported server=", serverName);
      return null;
    } catch (e) {
      console.error("[HiAnime-TV] findEpisodeServer() ERROR", String(e), e && e.stack ? e.stack : "");
      throw e;
    }
  }

  extractMegaCloud(embedUrl, returnHeaders = false) {
    console.log("[HiAnime-TV] extractMegaCloud() embedUrl=", embedUrl, "returnHeaders=", returnHeaders);

    const url = new URL(embedUrl);
    const baseDomain = `${url.protocol}//${url.host}/`;

    const headers = {
      "Accept": "*/*",
      "X-Requested-With": "XMLHttpRequest",
      "Referer": baseDomain,
      "Origin": `${url.protocol}//${url.host}`,
      "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36"
    };

    const r = this._fetch(embedUrl, { headers });
    const html = r.text();

    console.log("[HiAnime-TV] extractMegaCloud() embed status=", r.status, "ok=", r.ok, "htmlLen=", (html || "").length);

    const fileIdMatch = html.match(/<title>\s*File\s+#([a-zA-Z0-9]+)\s*-/i);
    if (!fileIdMatch) throw new Error("file_id not found in embed page");
    const fileId = fileIdMatch[1];

    let nonce = null;
    const match48 = html.match(/\b[a-zA-Z0-9]{48}\b/);
    if (match48) nonce = match48[0];
    else {
      const match3x16 = [...html.matchAll(/["']([A-Za-z0-9]{16})["']/g)];
      if (match3x16.length >= 3) {
        nonce = match3x16[0][1] + match3x16[1][1] + match3x16[2][1];
      }
    }
    if (!nonce) throw new Error("nonce not found");

    const sourcesUrl = `${baseDomain}embed-2/v3/e-1/getSources?id=${fileId}&_k=${nonce}`;
    console.log("[HiAnime-TV] extractMegaCloud() sourcesUrl=", sourcesUrl);

    const sr = this._fetch(sourcesUrl, { headers });
    const sourcesJson = sr.json();

    console.log("[HiAnime-TV] extractMegaCloud() sources status=", sr.status, "ok=", sr.ok,
      "sources=", (sourcesJson.sources ? sourcesJson.sources.length : 0),
      "tracks=", (sourcesJson.tracks ? sourcesJson.tracks.length : 0)
    );

    return {
      sources: sourcesJson.sources || [],
      tracks: sourcesJson.tracks || [],
      intro: sourcesJson.intro || null,
      outro: sourcesJson.outro || null,
      server: sourcesJson.server || null,
      headersProvided: returnHeaders ? headers : undefined
    };
  }
}

module.exports = HiAnime;
console.log("[HiAnime-TV] module.exports set");