const Discord = require("discord.js");
const client = new Discord.Client();
const ytdl = require("ytdl-core");
const request = require("request");
const fs = require("fs");
const getYoutubeID = require("get-youtube-id");
const fetchVideoInfo = require("youtube-info")

var config = JSON.parse(fs.readFileSync('./settings.json', 'utf-8'));
const yt_api_key = config.yt_api_key
const bot_controller = config.bot_controller;
const prefix = config.prefix;
const discord_token = config.discord_token;

client.login(discord_token);

var queue = [];
var queueNames = [];
var isPlaying = false;
var dispatcher = null;
var voicechannel = null;
var skipReq = 0;
var skippers = [];

client.on("message", function (message) {
    const member = message.member;
    const mess = message.content.toLowerCase();
    const args = message.content.split(' ').slice(1).join(" ")

    if (mess.startsWith(prefix + "play")) {
        if (member.voiceChannel || client.guild.get("387879921911070721").voiceConnection != null) {
            if (queue.length > 0 || isPlaying) {
                getID(args, function (id) {
                    add_to_queue(id);
                    fetchVideoInfo(id, function (err, videoInfo) {
                        if (err) throw new Error(err);
                        message.reply(" Added to queue: **" + videoInfo.title + "**");
                        queueNames.push(videoInfo.title)
                    })
                });
            } else {
                isPlaying = true;
                getID(args, function (id) {
                    queue.push("placeholder");
                    playMusic(id, message);
                    fetchVideoInfo(id, function (err, videoInfo) {
                        if (err) throw new Error(err);
                        message.reply(" Now playing **" + videoInfo.title + "**");
                    })
                });
            }
        } else {
            message.reply("You need to be in a voice channel!");
        }

    } else if (mess.startsWith(prefix + "skip")) {
        if (skippers.indexOf(message.author.id) === -1) {
            skippers.push(message.author.id);
            skipReq++;
            if (skipReq >= Math.ceil((voicechannel.members.size - 1) / 2)) {
                skip_song(message);
                message.reply("your skip has been acknowledged. Skipping now!")
            } else {
                message.reply("your skip has been acknowledged. You need **" + Math.ceil((voicechannel.members.size - 1) / 2) - skipReq) = "** more skip votes!";
            }
        } else {
            message.reply("you already voted to skip!")
        }
    } else if (mess.startsWIth(prefix + "queue")) {
        var mess = "```";
        for (var i = 0; i < queueNames.length; i++) {
            var temp = (i + 1) + ":" + queueNames[i] + (i === 0 ? "**(Current Song)**" : "") + "\n";
            if ((message2 + temp).length <= 2000 - 3) {
                message2 += temp;
            } else {
                message2 += "```"
                message.channel.send(message2);
                message2 = "```";
            }
        }
        message2 += "```";
        message.channel.send(message2)
            }
        }
    }
}




    Client.on("ready", function () {
        console.log("I am ready!");
    });
    function skip_song(message) {
        dispatcher.end();
    }

    function playMusic(id, message) {
        voicechannel = message.member.voiceChannel;



        voicechannel.join().then(function (connection) {
            stream = ytdl("https://www.youtube.com/watch?v=" + id, {
                filer: "audioonly"
            });
            skipReq = 0;
            skippers = [];
            dispatcher = connection.playStream(stream);
            queue.shift();
            queueNames.shift
            if (queue.length == 0) {
                queue = [];
                queueNames = [];
                isPlaying = false;
            } else {
                setTimeout(function () {
                    playMusic(queue[0], message);
                }, 500);
            }

        });
    }





    function isYoutube(str) {
        return str.toLowerCase().indexOf("youtube.com") > -1;
    }

    function getID(str, cb) {
        if (isYoutube(str)) {
            cb(getYoutubeID(str));
        } else {
            search_video(str, function (id) {
                cb(id);
            });
        }
    }
    function add_to_queue(strID) {
        if (isYoutube(strID)) {
            queue.push(getYoutubeID(strID));
        } else {
            queue.push(strID);
        }
    }
    function search_video(query, callback) {
        request("https://www.googleapis.com/youtube/v3/search?part=id&type=video&q=" + encodeURIComponent(query) + "&key=" + yt_api_key, function (error, response, body) {
            var json = JSON.parse(body);
            callback(json.items[0].id.videoId);

        });
    };
})