// EarrapePotter.js 2018/06/24 @author sanyo[jp]
// This program works with node.js

// **Please add the library below**
// npm install discord.js
// npm install node-opus

// **Run**
// node EarrapePotter.js

// Bot user token
const TOKEN = "Token";
// 音割れポッター sound file path
const EARRAPE_POTTER = "音割れポッター.mp4"
// play volume
const VOLUME = 1

const Discord = require("discord.js");

const client = new Discord.Client();

client.on('message', msg => {
  var command = msg.content.trim().toLowerCase();

  // play
  if (/^\?{6,}$/.test(command)) {
    var guild = client.guilds.get(msg.guild.id);
    var voiceChannel = getVoiceChannel(guild, msg.author);
    if (voiceChannel != null) {
      if (voiceChannel.connection == null) {
        // play
        voiceChannel.join().then(voiceConnection => {
          playEarrapePotter(voiceConnection);
        }).catch(console.log);
      } else {
        // replay
        var voiceConnection = voiceChannel.connection;
        var dispatcher = voiceConnection.dispatcher;
        dispatcher.removeAllListeners('end');
        dispatcher.end();
        playEarrapePotter(voiceConnection);
      }
    }
  }

  // stop
  if (/^!\?*$/.test(command)) {
    var guild = client.guilds.get(msg.guild.id);
    var voiceChannel = getVoiceChannel(guild, msg.author);
    if (voiceChannel != null && voiceChannel.connection != null && voiceChannel.connection.dispatcher != null) {
      voiceChannel.connection.dispatcher.end();
    }
  }
});

function playEarrapePotter(voiceConnection) {
  var dispatcher = voiceConnection.playFile(EARRAPE_POTTER);
  dispatcher.on('end', () => {
    voiceConnection.channel.leave();
    log("leave");
  });
  dispatcher.setVolume(VOLUME);
  log("play");
}

function getVoiceChannel(guild, user) {
  for (var voiceChannel of guild.channels.values()) {
    if (voiceChannel.type !== 'voice')
      continue;
    for (var member of voiceChannel.members.values())
      if (member.user.id === user.id)
        return voiceChannel;
  }
}

function log(str) {
  console.log(new Date().toString() + ": " + str);
}

client.login(TOKEN);

client.on('ready', () => {
  log('ready!');
});