function vypocitatCas(vojsl) {
  let c = new Date();
  let d = new Date();
  let hod = d.getHours();
  let min = d.getMinutes();
  if (min >= 30) {
    min = 0;
    if (hod == 23) {
      hod = 0;
      d.setDate(c.getDate() + 1);
    } else {
      hod++;
    }
  } else {
    min = 30;
  }
  d.setHours(hod);
  d.setMinutes(min);
  d.setSeconds(0);
  
  setTimeout(function() {
    rekniCas(vojsl, `${nula(hod)}${nula(min)}`); 
  }, d - c + 3000);
}

function rekniCas(vojsl, cas) {
  if (!vojsl) return;
  const d1 = vojsl.play(`./zvuky/intro.mp3`);
  d1.on('finish', function () {
    const d2 = vojsl.play(`./zvuky/${cas}.mp3`);
    d2.on('finish', function () {  
      vojsl.play(`./zvuky/grg.mp3`);
    });
  });
  
  vypocitatCas(vojsl);
}

function nula(a) {
  return a < 10 ? "0" + a : a;
}

module.exports = (mes, komand, celArgs) => {
  switch (komand) {

    case 'wojs':
      mes.channel.send(`vojs se pise s normalnim v ti kriple ${mes.author}`);
      break;

    case 'vojs':
      const channel = mes.member.voice.channel;
      if (!channel) {
        mes.channel.send(`di si tam sam ne ty gadzo ${mes.author}`);
        break;
      }
      if (celArgs !== 'potichu') mes.channel.send('<@&591306633196339261> vojs');

      channel.join()
        .then(con => {
          vypocitatCas(con);
          con.play('./zvuky/nazdar.ogg');
        });
      break;

    case "odejdi":
    case "disconnect":
    case "leave":
    case "odpoj":
    case "votpoj":
    case "vodpoj":
    case "vodprejskni":
    case "tahni":
    case "táhni":
    case "vypadni":
      const vojs = mes.guild.voice;
      if (!vojs) {
        mes.channel.send('nejsem ve vojsu');
        break;
      }
      vojs.channel.leave();
      mes.react('purfieRIP:644609482843881483');
      break;

    default:
      return false;
  }
  return true;
};