/**
 * Poke is a Free/Libre youtube front-end !
 *
 * This file is Licensed under LGPL-3.0-or-later. Poketube itself is GPL, Only this file is LGPL.
 * See a copy here: https://www.gnu.org/licenses/lgpl-3.0.txt
 * Please don't remove this comment while sharing this code.
 */

const { toJson } = require("xml2json");
const { curly } = require("node-libcurl");
const getdislikes = require("../libpoketube/libpoketube-dislikes.js");
const getColors = require("get-image-colors");
const config = require("../../config.json");
const { Innertube, InnertubeError } = require("youtubei.js");

class InnerTubePokeVidious {
  constructor(config) {
    this.config = config;
    this.cache = {};
    this.language = "hl=en-US";
    this.region = "region=US";
    this.sqp = "-oaymwEbCKgBEF5IVfKriqkDDggBFQAAiEIYAXABwAEG&rs=AOn4CLBy_x4UUHLNDZtJtH0PXeQGoRFTgw";
    this.useragent = config.useragent ||
      "PokeTube/2.0.0 (GNU/Linux; Android 14; Trisquel 11; poketube-vidious; like FreeTube)";
    this.youtubeClient = null;
  }

  isvalidvideo(id) {
    return (
      id !== "assets" &&
      id !== "cdn-cgi" &&
      id !== "404" &&
      /^([A-Za-z0-9_-]{11})$/.test(id)
    );
  }

  async _initYouTube() {
    if (!this.youtubeClient) {
      this.youtubeClient = await Innertube.create({
        lang: this.language.split("=")[1],
        location: this.region.split("=")[1],
      });
    }
    return this.youtubeClient;
  }

  _mapThumbnails(thumbnails) {
    const list = Array.isArray(thumbnails) ? thumbnails : [];
    return list.map((t) => ({
      url: t.url,
      width: t.width,
      height: t.height,
    }));
  }

  async getYouTubeApiVideo(f, videoId, contentlang, contentregion) {
    if (!videoId) {
      return { error: "Gib ID" };
    }

    // 1h cache
    if (
      this.cache[videoId] &&
      Date.now() - this.cache[videoId].timestamp < 3_600_000
    ) {
      return this.cache[videoId].result;
    }

    const headers = { "User-Agent": this.useragent };
    const youtube = await this._initYouTube();

    let info, commentsData;

    // Try youtubei.js first, but fallback to invapi on any InnertubeError
    try {
      [commentsData, info] = await Promise.all([
        youtube.getComments(videoId),
        youtube.getInfo(videoId),
      ]);
    } catch (err) {
      if (err instanceof InnertubeError) {
        console.warn("[YOUTUBEJS] fallback to invapi due to:", err.message);
        // comments fallback
        commentsData = { comments: [], comment_count: 0 };
        try {
          const c = await fetch(
            `${this.config.invapi}/comments/${videoId}?hl=${contentlang}&region=${contentregion}`,
            { headers }
          );
          commentsData = await c.json();
        } catch {} 
        // info fallback
        try {
          const v = await fetch(
            `${this.config.invapi}/videos/${videoId}?hl=${contentlang}&region=${contentregion}`,
            { headers }
          );
          info = (await v.json()).video || {};
        } catch {
          info = {};
        }
      } else {
        throw err;
      }
    }

    // legacy curl
    const legacy = await curly
      .get(`${this.config.tubeApi}video?v=${videoId}`, {
        httpHeader: Object.entries(headers).map(([k, v]) => `${k}: ${v}`),
      })
      .then((res) => {
        const parsed = JSON.parse(toJson(res.data));
        return { json: parsed, video: parsed.video };
      });

    // build response (same as before)
    const vid = info;
    const resp = {
      type: vid.type,
      title: vid.title,
      videoId: vid.id,
      error: vid.info?.reason || null,
      videoThumbnails: this._mapThumbnails(vid.thumbnails),
      storyboards: Array.isArray(vid.storyboards)
        ? vid.storyboards.map((sb) => ({
            url: sb.url,
            width: sb.width,
            height: sb.height,
            mime: sb.mimeType,
          }))
        : [],
      description: vid.description,
      descriptionHtml: vid.descriptionRenderers?.description,
      published: vid.uploadDate
        ? Math.floor(new Date(vid.uploadDate).getTime() / 1000)
        : null,
      publishedText: vid.publishedText,
      keywords: vid.keywords,
      viewCount: vid.viewCount,
      likeCount: vid.likes,
      dislikeCount: 0,
      paid: vid.isPaid,
      premium: vid.isPremium,
      isFamilyFriendly: vid.isFamilySafe,
      allowedRegions: vid.availableCountries,
      genre: vid.genre,
      genreUrl: vid.genreUrl,
      author: vid.author,
      authorId: vid.channelId,
      authorUrl: `/channel/${vid.channelId}`,
      authorVerified: vid.isVerified,
      authorThumbnails: this._mapThumbnails(vid.authorThumbnails),
      subCountText: vid.subscriberCountText,
      lengthSeconds: vid.lengthSeconds,
      allowRatings: vid.isRatingsEnabled,
      rating: 0,
      isListed: !vid.isUnlisted,
      liveNow: vid.isLive,
      isPostLiveDvr: vid.isPostLiveDvr,
      isUpcoming: vid.upcoming,
      premiereTimestamp: vid.premiereTimestamp
        ? Math.floor(new Date(vid.premiereTimestamp).getTime() / 1000)
        : null,

      // legacy
      json: legacy.json,
      video: legacy.video,
      comments: commentsData,
      engagement: (await getdislikes(videoId)).engagement,
      wiki: "",
      channel_uploads:
        f === "true"
          ? await fetch(
              `${this.config.invapi}/channels/${vid.channelId}?hl=${contentlang}&region=${contentregion}`,
              { headers }
            ).then((r) => r.json())
          : {},
    };

    this.cache[videoId] = { result: resp, timestamp: Date.now() };
    return resp;
  }
}

module.exports = new InnerTubePokeVidious({
  tubeApi: "https://inner-api.poketube.fun/api/",
  invapi: "https://invid-api.poketube.fun/bHj665PpYhUdPWuKPfZuQGoX/api/v1",
  invapi_alt:
    config.proxylocation === "EU"
      ? "https://invid-api.poketube.fun/api/v1"
      : "https://iv.ggtyler.dev/api/v1",
  dislikes: "https://returnyoutubedislikeapi.com/votes?videoId=",
  t_url: "https://t.poketube.fun/",
  useragent: config.useragent,
});