const moment = require('moment-timezone');

function isServiceOpen() {
  let now = moment().tz('Australia/Brisbane');
  let isWorkday = now.isoWeekday() < 6;
  let isWorkingHour = now.hour() > 7 && now.hour() < 17;

  return isWorkday && isWorkingHour;
}

exports.handler = function(context, event, callback) {
  const twiml = new Twilio.twiml.VoiceResponse();

  console.log(event);

  const callIncludesRecording = !!event.RecordingUrl;
  const callWasAnswered = event.DialCallStatus === 'completed';
  const callWasNotAnswered = event.DialCallStatus === 'no-answer';
  const serviceIsOpen = isServiceOpen();

  if (callWasAnswered) {
    twiml.hangup();
  } else if (callIncludesRecording) {
    console.log('Call includes recording!');

    // do something with the recording URL here
    console.log(event.RecordingUrl);

    twiml.say("Thank you! We'll come back to you shortly.");
    twiml.hangup();
  } else if (callWasNotAnswered) {
    console.log('Call was not answered...');

    twiml.say(
      'Unfortunately no one can answer right now. But you can leave a message.'
    );
    twiml.record({
      action: '/handle-call'
    });
  } else if (!serviceIsOpen) {
    console.log('Service is closed...');
    twiml.say('Service is closed but you can leave a message');
    twiml.record({
      action: '/handle-call'
    });
  } else {
    twiml.dial(
      {
        action: '/handle-call',
        method: 'POST',
        timeout: 5
      },
      '+4915...'
    );
  }

  callback(null, twiml);
};