/**
 * 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")

class InnerTubePokeVidious {
  constructor(config) {
    this.config = config;
    this.cache = {};
    this.language = "hl=en-US";
    this.param = "2AMB"
    this.param_legacy = "CgIIAdgDAQ%3D%3D"
    this.apikey = "AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8"
    this.ANDROID_API_KEY = "AIzaSyA8eiZmM1FaDVjRy-df2KTyQ_vz_yYM39w"
    this.ANDROID_APP_VERSION = "20.20.41" // https://www.apkmirror.com/apk/google-inc/youtube/youtube-20-20-41-release/
    this.ANDROID_VERSION = "16" // https://en.wikipedia.org/wiki/Android_version_history
    this.useragent = config.useragent || "PokeTube/2.0.0 (GNU/Linux; Android 14; Trisquel 11; poketube-vidious; like FreeTube)"
    this.INNERTUBE_CONTEXT_CLIENT_VERSION = "1"
    this.region = "region=US";
    this.sqp = "-oaymwEbCKgBEF5IVfKriqkDDggBFQAAiEIYAXABwAEG&rs=AOn4CLBy_x4UUHLNDZtJtH0PXeQGoRFTgw";
  }

  getJson(str) {
    try {
      return JSON.parse(str);
    } catch {
      return null;
    }
  }

  checkUnexistingObject(obj) {
    return obj && "authorId" in obj;
  }

  async getYouTubeApiVideo(f, v, contentlang, contentregion) {
    const { fetch } = await import("undici");

    if (v == null) return "Gib ID";

    if (this.cache[v] && Date.now() - this.cache[v].timestamp < 3600000) {
      return this.cache[v].result;
    }

    const headers = {
      "User-Agent": this.useragent,
    };

    const fetchWithRetry = async (url, options = {}, retries = 3) => {
      for (let attempt = 0; attempt < retries; attempt++) {
        const res = await fetch(url, {
          ...options,
          headers: {
            ...options.headers,
            ...headers,
          }
        });
        if (res.status === 500 && attempt < retries - 1) continue;
        return res;
      }
      return null;
    };

    try {
      const [invComments, videoInfo, videoData] = await Promise.all([
        fetchWithRetry(`${this.config.invapi}/comments/${v}?hl=${contentlang}&region=${contentregion}&h=${btoa(Date.now())}`).then(res => res.text()),
        fetchWithRetry(`${this.config.invapi}/videos/${v}?hl=${contentlang}&region=${contentregion}&h=${btoa(Date.now())}`).then(res => res.text()),
        curly.get(`${this.config.tubeApi}video?v=${v}`, {
          httpHeader: Object.entries(headers).map(([k, v]) => `${k}: ${v}`),
        }).then(res => {
          const json = toJson(res.data);
          const video = this.getJson(json);
          return { json, video };
        }),
      ]);

      const comments = this.getJson(invComments);
      const vid = this.getJson(videoInfo);
      const { json, video } = videoData;

      let p = {};
      if (f === "true") {
        const uploads = await fetchWithRetry(`${this.config.invapi}/channels/${vid.authorId}?hl=${contentlang}&region=${contentregion}`);
        p = this.getJson(await uploads.text());
      }

      if (!vid) {
        console.log(`Sorry nya, we couldn't find any information about that video qwq`);
      }

      if (this.checkUnexistingObject(vid)) {
        const fe = await getdislikes(v);

        this.cache[v] = {
          result: {
            json: json?.video,
            video,
            vid,
            comments,
            channel_uploads: p,
            engagement: fe.engagement,
            wiki: "",
            desc: "",
            color: await getColors(`https://i.ytimg.com/vi/${v}/hqdefault.jpg?sqp=${this.sqp}`).then(colors => colors[0].hex()),
            color2: await getColors(`https://i.ytimg.com/vi/${v}/hqdefault.jpg?sqp=${this.sqp}`).then(colors => colors[1].hex()),
          },
          timestamp: Date.now(),
        };

        return this.cache[v].result;
      }
    } catch (error) {
      this.initError("Error getting video", error);
    }
  }

  isvalidvideo(v) {
    if (v != "assets" && v != "cdn-cgi" && v != "404") {
      return /^([a-zA-Z0-9_-]{11})/.test(v);
    }
    return false;
  }

  initError(args, error) {
    console.error("[LIBPT CORE ERROR] " + args, error);
  }
}

const pokeTubeApiCore = 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,
});

module.exports = pokeTubeApiCore;