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('./botconfig.json', 'utf-8'));

const yt_api_key = config.yt_api_key;
//const bot_constroller = config.bot_controller;
const prefix = config.prefix;
const discord_token = config.token;

var guilds = {};


client.login(discord_token);

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

    if (!guilds[message.guild.id]) {
        guilds[message.guild.id] = {
            queue: [],
            queueNames: [],
            isPlaying: false,
            dispatcher: null,
            voiceChannel: null,
            skipReq: 0,
            skippers: []
        };
    }

    if (mess.startsWith(prefix + "play")) {
        if (message.member.voiceChannel || guilds[message.guild.id].voiceChannel != null) {
            if (guilds[message.guild.id].queue.length > 0 || guilds[message.guild.id].isPlaying) {
                getID(args, function(id) {
                    add_to_queue(id, message);
                    fetchVideoInfo(id, function(err, videoInfo) {
                        if (err) throw new Error(err);
                        message.reply(" added to queue: **" + videoInfo.title + "**");
                        guilds[message.guild.id].queueNames.push(videoInfo.title);
                    });
                });
            } else {
                isPlaying = true;
                getID(args, function(id) {
                    guilds[message.guild.id].queue.push(id);
                    playMusic(id, message);
                    fetchVideoInfo(id, function(err, videoInfo) {
                        if (err) throw new Error(err);
                        guilds[message.guild.id].queueNames.push(videoInfo.title);
                        message.reply(" now playing: **" + videoInfo.title + "**");
                    });
                });
            }
        } else {
            message.reply(" you need to be in a voice channel!");
        }
    } else if (mess.startsWith(prefix + "skip")) {
        if (guilds[message.guild.id].skippers.indexOf(message.author.id) === -1) {
            guilds[message.guild.id].skippers.push(message.author.id);
            guilds[message.guild.id].skipReq++;
            if (guilds[message.guild.id].skipReq >= Math.ceil((guilds[message.guild.id].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((guilds[message.guild.id].voiceChannel.members.size - 1) / 2) - guilds[message.guild.id].skipReq) = "**  more skip votes!";
            }
        } else {
            message.reply(" you already voted to skip!");
        }
    } else if (mess.startsWith(prefix + "queue")) {
        var message2 = "```";
        for (var i = 0; i < guilds[message.guild.id].queueNames.length; i++) {
            var temp = (i + 1) + ": " + guilds[message.guild.id].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);
    }else if(mess.startsWith(prefix + "stop")){
        message.channel.send("Function not added yet, Hz is lazy ish.");
    }else if(mess.startsWith(prefix + "help")){
        message.channel.send("=play <URL>          - play songs\n=skip                - skip current song\n=stop                - stop HzBot");
    }

});



client.on('ready', function() {
    console.log("I am ready!");
});

function skip_song(message) {
    guilds[message.guild.id].dispatcher.end();
}

function playMusic(id, message) {
    guilds[message.guild.id].voiceChannel = message.member.voiceChannel;



    guilds[message.guild.id].voiceChannel.join().then(function(connection) {
        stream = ytdl("https://www.youtube.com/watch?v=" + id, {
            filter: 'audioonly'
        });
        guilds[message.guild.id].skipReq = 0;
        guilds[message.guild.id].skippers = [];

        guilds[message.guild.id].dispatcher = connection.playStream(stream);
        guilds[message.guild.id].dispatcher.on('end', function() {
            guilds[message.guild.id].skipReq = 0;
            guilds[message.guild.id].skippers = [];
            guilds[message.guild.id].queue.shift();
            guilds[message.guild.id].queueNames.shift();
            if (guilds[message.guild.id].queue.length === 0) {
                guilds[message.guild.id].queue = [];
                guilds[message.guild.id].queueNames = [];
                guilds[message.guild.id].isPlaying = false;
            } else {
                setTimeout(function() {
                    playMusic(guilds[message.guild.id].queue[0], message);
                }, 500);
            }
        });
    });
}

function getID(str, cb) {
    if (isYoutube(str)) {
        cb(getYouTubeID(str));
    } else {
        search_video(str, function(id) {
            cb(id);
        });
    }
}

function add_to_queue(strID, message) {
    if (isYoutube(strID)) {
        guilds[message.guild.id].queue.push(getYouTubeID(strID));
    } else {
        guilds[message.guild.id].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);
        if (!json[0]) callback("3_-a9nVZYjk");
        else {
            callback(json[0].id.videoId);
        }
    });
}

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