var net = require('net');  // https://nodejs.org/dist/latest/docs/api/net.html

var BOT_NAME = 'mybot2';
var BOT_CHANNEL = '#bots';

var client = new net.Socket();

client.connect(6667, 'irc.devdungeon.com', function() {
  client.write('USER ' + BOT_NAME +  ' 0 * :' + BOT_NAME + '\n');
  client.write('NICK ' + BOT_NAME + '\n'); // Must wait a second to register

  setTimeout(function(){ 
      client.write('JOIN ' + BOT_CHANNEL + '\n');
      client.write('PRIVMSG ' + BOT_CHANNEL + ' Hello my Node.js bot is online!\n');
   }, 3000);
   
});

client.on('data', function(data) {
  console.log('MESSAGE_FROM_SERVER: ' + data);
 var text = data.toString();
 var splitText = text.split(' ');
  // If data starts with PING, respond with PONG :whatever
  if (text.startsWith('PING')) {
    client.write('PONG ' + text.substring(5));  // Remove `PING ` and pong back what it sent me
    console.log('Recieved PING. PONGED.');
  } else if (splitText[1] == 'PRIVMSG') { // PM or chat room
    // If data comes from a channel (#general):
    //   :nanodano!johnd@107.181.165.217 PRIVMSG #general :Hello bot
    // If data comes from privmsg (dano):
    //   :nanodano!johnd@107.181.165.217 PRIVMSG danobot :hey
    console.log('Destination:' + splitText[2])
    // Was it a direct message or to the channel?
    if (splitText[2] == BOT_CHANNEL) {
       console.log('message was from ' + BOT_CHANNEL)
    } 
    if (splitText[2] == BOT_NAME) {
       console.log('message was directly to me (' + BOT_NAME + ')')
    }
    // Was the message a command?
    if (splitText[3].substring(1).startsWith('!')) {
      console.log('Command detected with ! prefix')
      // Cut off first character, and check command. Run appropriate function. !bitcoin. !ping !8-ball
      var command = splitText[3].substring(2).trim().toLowerCase();
      console.log('Command: `' + command + '`');
      if (command == 'ping') { 
        console.log('Ping command detected! Ponging.');
        client.write('PRIVMSG ' + BOT_CHANNEL + ' Pong\n');
      }
    }
    console.log('PrivMsg: ' + splitText[3].substring(1)); // Cut off : in front    
  } else {
    console.log('Discarded unexpected/unimportant message.');
  }

});