const playdl = require("play-dl");
const fetch = require("node-fetch");
const { getData, getPreview, getTracks } = require("spotify-url-info")(fetch);
const Youtube = require("youtube-sr").default;

/*
	Thanks to: https://github.com/nizewn/Dodong

	hello stranger,

	as a result of my headaches while dealing with the discord-player extractor API,
	what you will see here will mostly be poorly-written code.
	this could use modularisation or some cleanup (i might do it once i have free time)

	thanks :)

		-nize
*/

module.exports = {
	important: true,
	validate: () => true, // true, since we're also using this for searches when query isnt a valid link
	getInfo: async (query) => {
		// eslint-disable-next-line no-async-promise-executor, no-unused-vars
		return new Promise(async (resolve, reject) => {
			try {
				// ---- start soundcloud ----
				if (["track", "playlist"].includes(await playdl.so_validate(query))) {
					const info = await playdl.soundcloud(query);
					if (info.type === "track") {
						const track = {
							title: info.name,
							duration: info.durationInMs,
							thumbnail: info.thumbnail,
							async engine() {
								return (await playdl.stream(info.url, { discordPlayerCompatibility: true })).stream;
							},
							views: 0,
							author: info.publisher ? info.publisher.name ?? info.publisher.artist ?? info.publisher.writer_composer ?? null : null,
							description: "",
							url: info.permalink,
							source: "soundcloud-custom"
						};
						return resolve({ playlist: null, info: [track] });
					} else if (info.type === "playlist") {
						const trackList = await info.all_tracks();
						const tracks = await trackList.map(track => {
							return {
								title: track.name,
								duration: track.durationInMs,
								thumbnail: track.thumbnail,
								async engine() {
									return (await playdl.stream(track.url, { discordPlayerCompatibility: true })).stream;
								},
								views: 0,
								author: track.publisher ? track.publisher.name ?? track.publisher.artist ?? track.publisher.writer_composer ?? null : null,
								description: "",
								url: track.permalink,
								source: "soundcloud-custom"
							};
						});
						const playlist = {
							title: info.name,
							description: "",
							thumbnail: null,
							type: "playlist",
							source: "soundcloud-custom",
							author: info.user,
							id: info.id,
							url: info.url,
							rawPlaylist: info
						};
						return resolve({ playlist: playlist, info: tracks });
					}
				}
				// ---- end soundcloud ----

				// ---- start spotify ----
				if (query.includes("open.spotify.com") || query.includes("play.spotify.com")) {
					const info = await getPreview(query);
					if (info.type === "track") {
						const spotifyTrack = await getData(query);
						const track = {
							title: info.title,
							duration: spotifyTrack.duration_ms,
							thumbnail: info.image,
							async engine() {
								return (await playdl.stream(await Youtube.search(`${info.artist} ${info.title} lyric`, {limit: 1, type: "video", safeSearch: true}).then(x => x[0] ? `https://youtu.be/${x[0].id}` : "https://youtu.be/Wch3gJG2GJ4"), { discordPlayerCompatibility : true })).stream;
							},
							views: 0,
							author: info.artist,
							description: "",
							url: info.link,
							source: "spotify-custom"
						};
						return resolve({ playlist: null, info: [track] });
					} else if (["album", "artist", "playlist"].includes(info.type)) {
						const trackList = await getTracks(query);
						const tracks = trackList.map(track => {
							return {
								title: track.name,
								duration: track.duration_ms,
								thumbnail: track.album && track.album.images.length ? track.album.images[0].url : null,
								async engine() {
									return (await playdl.stream(await Youtube.search(`${track.artists[0].name} ${track.name} lyric`, {limit: 1, type: "video", safeSearch: true}).then(x => x[0] ? `https://youtu.be/${x[0].id}` : "https://youtu.be/Wch3gJG2GJ4"), { discordPlayerCompatibility : true })).stream;
								},
								views: 0,
								author: track.artists ? track.artists[0].name : null,
								description: "",
								url: track.external_urls.spotify,
								source: "spotify-custom"
							};
						});
						const playlist = {
							title: info.title,
							description: "",
							thumbnail: info.image,
							type: info.type === "album" ? "album" : "playlist",
							source: "spotify-custom",
							author: info.artist,
							id: null,
							url: info.link,
							rawPlaylist: info
						};
						return resolve({ playlist: playlist, info: tracks });
					}
				}
				// ---- end spotify ----

				if (query.startsWith("https")) {
					query = query.split("&")[0];
				}
				if (query.startsWith("https") && playdl.yt_validate(query) === "video") {
					const info = await Youtube.search(query, {limit: 1, type: "video", safeSearch: true});
					if(!info || !info.length)
						return resolve({ playlist: null, info: null });

					const track = {
						title: info[0].title,
						duration: info[0].duration,
						thumbnail: info[0].thumbnail ? info[0].thumbnail.url : null,
						async engine() {
							return (await playdl.stream(`https://youtu.be/${info[0].id}`, { discordPlayerCompatibility : true })).stream;
						},
						views: info[0].views,
						author: info[0].channel.name,
						description: "",
						url: `https://youtu.be/${info[0].id}`,
						source: "youtube-custom"
					};
					return resolve({ playlist: null, info: [track] });
				} else if (playdl.yt_validate(query) === "playlist") {
					const info = await playdl.playlist_info(query, { incomplete: true });
					const trackList = await info.all_videos();
					const tracks = trackList.map(track => {
						return {
							title: track.title,
							duration: track.durationInSec * 1000,
							thumbnail: track.thumbnails ? track.thumbnails[0] ? track.thumbnails[0].url : null : null,
							async engine() {
								return (await playdl.stream(await Youtube.search(track.url, {limit: 1, type: "video", safeSearch: true}).then(x => x[0] ? `https://youtu.be/${x[0].id}` : "https://youtu.be/Wch3gJG2GJ4"), { discordPlayerCompatibility : true })).stream;
							},
							views: track.views,
							author: track.channel.name,
							description: "",
							url: track.url,
							source: "youtube-custom"
						};
					});
					const playlist = {
						title: info.title,
						description: "",
						thumbnail: info.thumbnail ? info.thumbnail.url : null,
						type: "playlist",
						source: "youtube-custom",
						author: info.channel.name,
						id: info.id,
						url: info.url,
						rawPlaylist: info
					};
					return resolve({ playlist: playlist, info: tracks });
				}

				const search = await Youtube.search(query, { limit: 5, type: "video", safeSearch: true });

				if(search && search.length) {
					const tracks = search.map(track => {
						return {
							title: track.title,
							duration: track.duration,
							thumbnail: track.thumbnail ? track.thumbnail.url : null,
							async engine() {
								return (await playdl.stream(`https://youtu.be/${track.id}`, { discordPlayerCompatibility: true })).stream;
							},
							views: track.views,
							author: track.channel.name,
							description: "",
							url: `https://youtu.be/${track.id}`,
							source: "youtube-custom"
						};
					});
					return resolve({ playlist: null, info: tracks });
				}

				return resolve({ playlist: null, info: null });
			} catch(error) {
				console.log(`Extractor: An error occurred while attempting to resolve ${query} :\n${error}`);
				return resolve({ playlist: null, info: null });
			}
		});
	}
};