const Discord = require("discord.js");
const client = new Discord.Client();
const config = require("./config/config.json");
const Genius = require("./genius");
const levenshtein = require('js-levenshtein');
const fs = require("fs");

client.on('ready', () => {
	console.log(`Logged in as ${client.user.tag}!`);
});

client.on('message', message => {
	if (!message.content.startsWith(config.prefix) || message.author.bot) return;
	
	const args = message.content.slice(config.prefix.length).trim().split(" ");
	const command = args.shift().toLowerCase();

	if (command === "lyrics") {
		Genius.search_song(args.join(" "), song => {
			Genius.get_lyrics(song.id, (err, lyrics) => {
				if (err) {
					console.log("Error while fetching lyrics: " + err.message);
					message.channel.send("Error fetching lyrics, please retry in a few seconds");
				} 
				else {
					for (let i = 9; i < lyrics.length; i += 1900) {
						message.channel.send("```" + lyrics.substr(i, 1900) + "```");
					}
				}
			});
		});
	}

	else if (command === "play") {
		Genius.search_song(args.join(" "), (err, song) => {
			if (err) {
				message.channel.send("Je connais pas \"" + args.join(" ") + "\".");
			} else {
				Genius.get_lyrics(song.id, true, (err, lyrics) => {
					if (err) {
						console.log("Error while fetching lyrics: " + err.message);
						message.channel.send("Error fetching lyrics, please retry in a few seconds");
					} 
					else {
						const tab_lyrics = lyrics.split("\n");
						const new_tab_lyrics = []
						for (let i = 0; i < tab_lyrics.length; i++) {
							if (tab_lyrics[i] === "" || tab_lyrics[i].includes("[")) {
								tab_lyrics.splice(i, 1);
								i--;
							}
						}
						const random = Math.floor(Math.random() * tab_lyrics.length) + 4;
						let lyricToFind = tab_lyrics[random];
						while (lyricToFind.indexOf("(") != -1) {
							const start = lyricToFind.indexOf("(");
							const end = lyricToFind.indexOf(")");
							const endLyric = lyricToFind.slice(end + 1);
							lyricToFind = lyricToFind.slice(0, start - 1) + endLyric;
						}
						let newMessage = "```\n";
						for (let i = 4; i > 0; i--) {
							newMessage += tab_lyrics[random - i] + "\n";
						}
						lyricToFind.split(" ").forEach(word => {
							if (word.includes(",")) newMessage += "_, ";
							else newMessage += "_ ";
						});
						newMessage += "```";
						message.channel.send(newMessage).then(() => {
							var filter = m => m.content.includes("");
							message.channel.awaitMessages(filter, { max: 0, time: 15000 + lyricToFind.split(" ").length * 1000, errors: [] })
							.then(messages => {
								message.channel.send("La bonne phrase était: `" + lyricToFind + "`");
								messages.forEach(message => {
									const max = Math.max(lyricToFind.length, message.content.length);
									const acc = 1 - (levenshtein(lyricToFind.toLowerCase(), message.content.toLowerCase()) / max);
									if (acc >= 0.80) {
										message.reply("**Gagné!** (" + Math.round(acc * 100) + "%)");
									}
									else message.reply("Perdu! (" + Math.round(acc * 100) + "%)");
								});
							})
							.catch(collected => {
								console.log(collected);
								message.channel.send('Timeout');
							});
						});
					}
				});
			}
		});
	}

	else if (command === "add") {
		Genius.search_song(args.join(" "), (err, song) => {
			if (err) {
				message.channel.send("Je connais pas \"" + args.join(" ") + "\".");
			} else {
				fs.readFile('data.json', (err, data) => {
					if (err) throw err;
					data = JSON.parse(data);
					if (data[message.author.id] === undefined) {
						data[message.author.id] = [];
					}
					data[message.author.id].push({
						id: song.id,
						title: song.title_with_featured,
						artist: song.primary_artist.name
					});
					fs.writeFile('data.json', JSON.stringify(data, null, 4), (err) => {
						if (err) throw err;
						message.reply("J'ai ajouté \"" + song.title + "\" à votre liste");
					});
				})
			}
		});
	}

	else if (command === "list") {
		fs.readFile('data.json', (err, data) => {
			if (err) throw err;
			data = JSON.parse(data);
			const songs = data[message.author.id];
			if (songs === undefined) {
				message.reply("Vous n'avez pas encore ajouté de musiques");
			} else {
				let newMessage = "```\nListe de " + message.author.username + "\n";
				songs.forEach(song => {
					newMessage += song.artist + " - " + song.title + "\n";
				});
				newMessage += "```";
				message.channel.send(newMessage);
			}
		});
	}
});

client.login(config["discord-token"]);