var timeout;

window.onload = function() {
  timeout = setTimeout(function() {
    document.getElementById('tweet').innerHTML = "[ Could not contact twitter.com. ]";
  }, 35000);
  var el = document.createElement('script');
  el.src = 'http://twitter.com/statuses/user_timeline/hzr.json?callback=displayTweet&count=1';
  document.body.appendChild(el);
};

function displayTweet(tweet) {
  clearTimeout(timeout);
  var t = tweet[0], e = document.getElementById('tweet');
  if (t) {
    e.innerHTML =
      t.text + ' <a class="time" href="http://twitter.com/' +
      t.user.screen_name + '/statuses/' + t.id + '">' +
      relative_time(t.created_at) + '</a>';
  }
  else {
    e.innerHTML = 'No tweets found';
  }
}

// from http://twitter.com/javascripts/blogger.js
function relative_time(time_value) {
  var values = time_value.split(" ");
  time_value = values[1] + " " + values[2] + ", " + values[5] + " " + values[3];
  var parsed_date = Date.parse(time_value);
  var relative_to = (arguments.length > 1) ? arguments[1] : new Date();
  var delta = parseInt((relative_to.getTime() - parsed_date) / 1000);
  delta = delta + (relative_to.getTimezoneOffset() * 60);

  if (delta < 60) {
    return 'less than a minute ago';
  } else if(delta < 120) {
    return 'about a minute ago';
  } else if(delta < (60*60)) {
    return (parseInt(delta / 60)).toString() + ' minutes ago';
  } else if(delta < (120*60)) {
    return 'about an hour ago';
  } else if(delta < (24*60*60)) {
    return 'about ' + (parseInt(delta / 3600)).toString() + ' hours ago';
  } else if(delta < (48*60*60)) {
    return '1 day ago';
  } else {
    return (parseInt(delta / 86400)).toString() + ' days ago';
  }
}