// Count Laracasts series total duration
(function() {
  var minutes = 0;
  let runningTimeElements = document.querySelectorAll('span.running-time');

  if(!runningTimeElements || runningTimeElements.length === 0) {
    return;
  }

  let addMinutes = function(el) {
    var duration = el.innerText.toLowerCase().replace(/run time /g, '');
    duration = duration.split(':');

    return parseInt(duration[0]) + parseFloat(duration[1]/60);
  };

  //return string
  let formatTotal = function(mins) {
    mins = Math.round(mins);
    if(mins <= 60) {
      return mins + 'm';
    }

    let hours = Math.floor(mins/60);
    mins -= hours*60;
    return hours + 'h ' + mins + 'm';
  };

  for(let i=0; i<runningTimeElements.length; i++) {
    minutes += addMinutes(runningTimeElements[i]);
  }

  let result = formatTotal(minutes);
  console.info('Total Series Runtime: ' + result);

  document.querySelectorAll('h1.series-title')[0].innerText += '\n (' + result + ')';

})();