window.onload = status_twitter;
var xhr = false;

function status_twitter() {

	if (window.XMLHttpRequest) {
		xhr = new XMLHttpRequest();
	}
	else {
		if (window.ActiveXObject) {
				xhr = new ActiveXObject("Microsoft.XMLHTTP");
		}
	}

	if (xhr) {
		pedirDatos();
	}
	else {
		alert("Lo siento, pero no he podido crear un XMLHttpRequest");
	}
}

function pedirDatos(){
	
	xhr.onreadystatechange = function(){		
			if (xhr.readyState == 4 ) {
				if(xhr.status == 200){
					if( xhr.responseText != "" ){
						twitterCallback2(xhr.responseText);
					}
					else{
						var obj = document.getElementById("twitter_update_list");
						obj.innerHTML = "<h3> No va bien Twitter </h3>";
					}
				}
				else{
					var obj = document.getElementById("twitter_update_list");
					obj.innerHTML = "<h3> No va bien Twitter </h3>";
				}
			}
	}

	xhr.open("POST", "http://www.alfonsomachado.com/wp-content/themes/Cutline/twitter.php", true);
	
	xhr.send(null);

	setTimeout("pedirDatos()",900 * 1000);	
}

function twitterCallback2(obj) {
	var twitters = eval("(" + obj + ")");
	var statusHTML = "";
	var username = "";
	for (var i=0; i<twitters.length; i++){
		username = twitters[i].user.screen_name
		statusHTML += ('<li><span>'+twitters[i].text+'</span> <a style="font-size:85%" href="http://twitter.com/'+username+'/statuses/'+twitters[i].id+'">'+relative_time(twitters[i].created_at)+'</a></li>')
	}
	document.getElementById('twitter_update_list').innerHTML = statusHTML;
}

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';
  }
}