Discord music bot

const discord = require('discord.js');
const Client = new discord.Client();
const ytdl = require('ytdl-core');
const YouTube = require('simple-youtube-api');
const fetch = require('snekfetch');
const youtube = new YouTube(process.env.YOUTUBE_API_KEY);
const Util = require("discord.js");
const queue = new Map();

Client.on('message', async msg => { // eslint-disable-line
  let message = msg;
    if (message.author.bot) return;
    if (message.channel.type === "dm") return;
    let prefix = ">"
    if (!msg.content.startsWith(prefix)) return undefined;

    const args = msg.content.split(' ');
    const searchString = args.slice(1).join(' ');
    const url = args[1] ? args[1].replace(/<(.+)>/g, '$1') : '';
    const serverQueue = queue.get(msg.guild.id);

    let command = msg.content.toLowerCase().split(' ')[0];
    command = command.slice(prefix.length)

    if (command === 'play') {
      if (!args[1]) {
            return msg.channel.send(":x: What should I play m8?")
          }
        const voiceChannel = msg.member.voiceChannel;
        if (!voiceChannel) return msg.channel.send(':x: Join a voice channel to play music!');
        const permissions = voiceChannel.permissionsFor(msg.client.user);
        if (!permissions.has('CONNECT')) {
            return msg.channel.send(':x: I dont have connect permission.');
        }
        if (!permissions.has('SPEAK')) {
            return msg.channel.send(':x: I dont have speak permission.');
        }

        if (url.match(/^https?:\/\/(www.youtube.com|youtube.com)\/playlist(.*)$/)) {
            const playlist = await youtube.getPlaylist(url);
            const videos = await playlist.getVideos();
            for (const video of Object.values(videos)) {
                const video2 = await youtube.getVideoByID(video.id); // eslint-disable-line no-await-in-loop
                await handleVideo(video2, msg, voiceChannel, true); // eslint-disable-line no-await-in-loop
            }

           msg.channel.send("🔍 Searching `"+searchString+"`").then(msg => {
                      msg.delete(1000)
                  })
            let embed = new Discord.RichEmbed()
            .setAuthor("Music", client.user.displayAvatarURL)
            .setColor("GREEN")
            .addField("Playlist Queued", `**[${playlist.title}](${playlist.url})**`)
            .setFooter(msg.author.tag, msg.author.displayAvatarURL)
            .setTimestamp()
            return msg.channel.send(embed);
        } else {
            try {
                var video = await youtube.getVideo(url);
            } catch (error) {
                try {
                  msg.channel.send("🔍 Searching `"+searchString+"`").then(msg => {
                      msg.delete(2000)
                  })
                    var videos = await youtube.searchVideos(searchString);
                    let index = 0;

                    const videoIndex = 1;
                    var video = await youtube.getVideoByID(videos[videoIndex - 1].id);
                } catch (err) {
                    console.error(err);
                    return msg.channel.send(':x: No result found.');
                }
            }
            return handleVideo(video, msg, voiceChannel);
        }
    } else if (command === 'youtube') {
          if (!args[0]) return msg.channel.send(":x: Please provide search query m8.")
        const voiceChannel = msg.member.voiceChannel;
        if (!voiceChannel) return msg.channel.send(':x: Join a voice channel to play music!');
        const permissions = voiceChannel.permissionsFor(msg.client.user);
        if (!permissions.has('CONNECT')) {
            return msg.channel.send(':x: I dont have connect permission.');
        }
        if (!permissions.has('SPEAK')) {
            return msg.channel.send(':x: I dont have speak permission.');
        }

        if (url.match(/^https?:\/\/(www.youtube.com|youtube.com)\/playlist(.*)$/)) {
            const playlist = await youtube.getPlaylist(url);
            const videos = await playlist.getVideos();
            for (const video of Object.values(videos)) {
                const video2 = await youtube.getVideoByID(video.id); // eslint-disable-line no-await-in-loop
                await handleVideo(video2, msg, voiceChannel, true); // eslint-disable-line no-await-in-loop
            }
            msg.channel.send("🔍 Searching `"+searchString+"`").then(msg => {
                      msg.delete(1000)
                  })
            let embed1 = new Discord.RichEmbed()
            .setAuthor("Music", client.user.displayAvatarURL)
            .setColor("GREEN")
            .addField("Playlist Queued", `[${playlist.title}](${playlist.url})`)
            .setFooter(msg.author.tag, msg.author.displayAvatarURL)
            .setTimestamp()
            return msg.channel.send(embed1);
        } else {
            try {
                var video = await youtube.getVideo(url);
            } catch (error) {
                try {
                    var videos = await youtube.searchVideos(searchString, 5);
                    let index = 0;
                  msg.channel.send("🔍 Searching `"+searchString+"`").then(msg => {
                      msg.delete(1000)
                  })
                  let sEmbed = new Discord.RichEmbed()
                   .setAuthor("YouTube Search", msg.author.avatarURL)
                   .setColor("RANDOM")
                   .setDescription(`${videos.map(video2 => `**${++index}. [${video2.title}](${video2.url})**`).join('\n')}`)
                   .setFooter(`Provide a number of a song.`, client.user.avatarURL)
                   .setTimestamp()
                  msg.channel.send(sEmbed).then(msg => {
                      msg.delete(10000)});
                    // eslint-disable-next-line max-depth
                    try {
                        var response = await msg.channel.awaitMessages(msg2 => msg2.content > 0 && msg2.content < 11, {
              maxMatches: 1,
                            time: 10000,
                            errors: ['time']
                        });
                    } catch (err) {
                        console.error(err);
                        return msg.channel.send(':x: Invalid Value/Time\'s up, Cancelling video selection.');
                    }
                    const videoIndex = parseInt(response.first().content);
                    var video = await youtube.getVideoByID(videos[videoIndex - 1].id);
                } catch (err) {
                    console.error(err);
                    return msg.channel.send(':x: No result found.');
                }
            }
            return handleVideo(video, msg, voiceChannel);
        }
    }else if (command === 'skip') {
        if (!msg.member.voiceChannel) return msg.channel.send(':x: You are not in a voice channel!');
        if (!serverQueue) return msg.channel.send(':x: There is no song to skip.');
        serverQueue.connection.dispatcher.end(':white_check_mark: Song Skipped!');
        msg.channel.send(":white_check_mark: Song Skipped!")
        return undefined;
    } else if (command === 'stop') {
        if (!msg.member.voiceChannel) return msg.channel.send(':x: You are not in a voice channel!');
        if (!serverQueue) return msg.channel.send(':x: No song currently playing.');
        serverQueue.songs = [];
        serverQueue.voiceChannel.leave();
        msg.channel.send(":white_check_mark: Disconnected!")
        return undefined;
    } else if (command === 'join') {
        if (!msg.member.voiceChannel) return msg.channel.send(':x: You are not in a voice channel!');
        msg.member.voiceChannel.join();
        msg.channel.send(":white_check_mark: Connected!")
        return undefined;
    } else if (command === 'vol') {
        if (!msg.member.voiceChannel) return msg.channel.send(':x: You are not in a voice channel!');
        if (!serverQueue) return msg.channel.send(':x: There is nothing playing.');
        if (!args[1]) {
          let vEmbed = new Discord.RichEmbed()
          .setAuthor("Current Volume", msg.guild.iconURL)
          .setColor("ORANGE")
          .setDescription(`**${(serverQueue.volume*20)}/100**`)
          .setFooter(client.user.tag, client.user.displayAvatarURL)
        return msg.channel.send(vEmbed)}
        if (!isNaN(args[0])) {
        serverQueue.volume = args[1]/20;
        serverQueue.connection.dispatcher.setVolumeLogarithmic(args[1] / 100);
       let Embed = new Discord.RichEmbed()
          .setAuthor("Music Volume", msg.guild.iconURL)
          .setColor("ORANGE")
          .setDescription(`Volume Changed To **${args[1]}/100**.`)
          .setFooter(client.user.tag, client.user.displayAvatarURL)
        return msg.channel.send(Embed);
    } return msg.channel.send(":x: Provide a valid number between 1-100.");
    } else if (command === 'np') {
        if (!serverQueue) return msg.channel.send(':x: There is nothing playing.');
      console.log(serverQueue.songs[0])
      const nsong = {
        id: serverQueue.songs[0].id,
        title: Util.escapeMarkdown(serverQueue.songs[0].title),
        url: `https://www.youtube.com/watch?v=${serverQueue.songs[0].id}`,
        channel: serverQueue.songs[0].channel.id,
        ct: serverQueue.songs[0].channel.title,
        tp: serverQueue.songs[0].publishedAt,
        duration: serverQueue.songs[0].duration,
        thumbnail: `https://i.ytimg.com/vi/${serverQueue.songs[0].id}/maxresdefault.jpg`
    };
      let hours = `${moment(nsong.duration.hours).format("HH")}`
    let minutes = `${moment(nsong.duration.minutes).format("mm")}`
    let seconds = `${moment(nsong.duration.seconds).format("ss")}`
       let Embed = new Discord.RichEmbed()
          .setAuthor("Current Song", msg.guild.iconURL)
          .setColor("ORANGE")
          .addField("Channel", `**[${serverQueue.songs[0].ct}](https://youtube.com/channel/${serverQueue.songs[0].channel})**`, true)
          .addField("Duration", `\`${nsong.duration.hours}:${nsong.duration.minutes}:${nsong.duration.seconds}\``, true)
          .addField("Published At", `${moment(serverQueue.songs[0].tp).format("dddd, MMMM do YYYY")}`, true)
//          .addField("Next Song:", `**[${serverQueue.songs[1].title}](${serverQueue.songs[1].url})**`, true)
          .setThumbnail(serverQueue.songs[0].thumbnail)
          .setDescription(`🎶 **[${serverQueue.songs[0].title}](${serverQueue.songs[0].url})**`)
          .setFooter(client.user.tag, client.user.avatarURL)
        return msg.channel.send(Embed);
    } else if (command === 'queue') {
      let index = "0"
        if (!serverQueue) return msg.channel.send(':x: There is nothing playing.');
        else {
               let Embed = new Discord.RichEmbed()
                   .setAuthor("MUSIC QUEUE", msg.author.avatarURL)
                   .setColor("RANDOM")
                 //  .setThumbnail(serverQueue.songs[0].get().Thumbnail)
                   .addField("Current Song:", `**- [${serverQueue.songs[0].title}](${serverQueue.songs[0].url})**`)
                   .addField("Next Song:", `**- [${serverQueue.songs[1].title}](${serverQueue.songs[1].url})**`)
                   .setDescription("**Queue:**\n"+serverQueue.songs.map(song => `**${++index})** **[${song.title}](${song.url})**`).join('\n'))
                   .setFooter(`${client.user.username}`, client.user.avatarURL)
                   .setTimestamp()
                  msg.channel.send(Embed);

    }
    } else if (command === 'pause') {
        if (serverQueue && serverQueue.playing) {
            serverQueue.playing = false;
            serverQueue.connection.dispatcher.pause();
            return msg.channel.send('⏸ Audio Paused!');
        }
        return msg.channel.send(':x: I am not playing anything?');
    } else if (command === 'resume') {
        if (serverQueue && !serverQueue.playing) {
            serverQueue.playing = true;
            serverQueue.connection.dispatcher.resume();
            return msg.channel.send('▶ Audio Resumed!');
        }
        return msg.channel.send(':x: Please pause a song to resume.');
    }

    return undefined;
});

async function handleVideo(video, msg, voiceChannel, playlist = false) {
    const serverQueue = queue.get(msg.guild.id);
    console.log(video);
    const song = {
        id: video.id,
        title: Util.escapeMarkdown(video.title),
        url: `https://www.youtube.com/watch?v=${video.id}`,
        channel: video.channel.id,
        ct: video.channel.title,
        tp: video.publishedAt,
        duration: video.duration,
        thumbnail: `https://i.ytimg.com/vi/${video.id}/maxresdefault.jpg`
    };
    if (!serverQueue) {
        const queueConstruct = {
            textChannel: msg.channel,
            voiceChannel: voiceChannel,
            connection: null,
            songs: [],
            volume: 3,
            playing: true
        };
        queue.set(msg.guild.id, queueConstruct);

        queueConstruct.songs.push(song);

        try {
            var connection = await voiceChannel.join();
            queueConstruct.connection = connection;
            play(msg.guild, queueConstruct.songs[0]);
        } catch (error) {
            console.error(`I could not join the voice channel: ${error}`);
            queue.delete(msg.guild.id);
            return msg.channel.send(`:x: I got some problem.: **${error}**.`);
        }
    } else {
        serverQueue.songs.push(song);
        console.log(serverQueue.songs);
        if (playlist) return undefined;
        else {
          let hours = `${moment(song.duration.hours).format("HH")}`
          let minutes = `${moment(song.duration.minutes).format("mm")}`
          let seconds = `${moment(song.duration.seconds).format("ss")}`

          let embed1 = new Discord.RichEmbed()
            .setAuthor("Music", client.user.displayAvatarURL)
            .setColor("GREEN")
            .setThumbnail(`https://i.ytimg.com/vi/${song.id}/maxresdefault.jpg`)
            .addField("Music Queued", `**[${song.title}](${song.url})**`, true)
            .addField("Uploaded by", `**[${song.ct}](https://youtube.com/channel/${song.channel})**`, true)
            .addField("Duration", `\`${song.duration.hours}:${song.duration.minutes}:${song.duration.seconds}\``, true)
            .addField("Published At", `${moment(song.tp).format("dddd, MMMM do YYYY")}`, true)
            .setFooter(msg.author.tag, msg.author.displayAvatarURL)
            .setTimestamp()
            return msg.channel.send(embed1);

        }
    }
    return undefined;
}

function play(guild, song) {
    const serverQueue = queue.get(guild.id);

    if (!song) {
        //serverQueue.voiceChannel.leave();
        queue.delete(guild.id);
        return;
    }
    console.log(serverQueue.songs);

    const dispatcher = serverQueue.connection.playStream(ytdl(song.url))
        .on('end', reason => {
            if (reason === 'Stream is not generating quickly enough.') {

              console.log('Song ended.')
             // serverQueue.textChannel.channel.send('Song Ended!');

            } else console.log(reason);
            serverQueue.songs.shift();
            play(guild, serverQueue.songs[0]);
        })
        .on('error', error => console.error(error));
    dispatcher.setVolumeLogarithmic(serverQueue.volume / 3);
    let hours = `${moment(song.duration.hours).format("HH")}`
    let minutes = `${moment(song.duration.minutes).format("mm")}`
    let seconds = `${moment(song.duration.seconds).format("ss")}`
    let embed1 = new Discord.RichEmbed()
            .setAuthor("Music", serverQueue.iconURL)
            .setColor("GREEN")
            .setThumbnail(`https://i.ytimg.com/vi/${song.id}/maxresdefault.jpg`)
            .addField("Started Playing", `🎶 **[${song.title}](${song.url})**`, true)
            .addField("Uploaded By", `**[${song.ct}](https://youtube.com/channel/${song.channel})**`, true)
            .addField("Duration", `\`${song.duration.hours}:${song.duration.minutes}:${song.duration.seconds}\``, true)
            .addField("Published At", `${moment(song.tp).format("dddd, MMMM do YYYY")}`, true)
            .setFooter(client.user.tag, client.user.displayAvatarURL)
            .setTimestamp()
            return serverQueue.textChannel.send(embed1);
}