var twitterPage = 0;

function twitterCallback(twitters) {
	if (twitters.length != 0) {
		var statusHTML = [];
		for (var i=0; i<twitters.length; i++){
			var username = twitters[i].user.screen_name;
			var status = twitters[i].text.replace(/((https?|s?ftp|ssh)\:\/\/[^"\s\<\>]*[^.,;'">\:\s\<\>\)\]\!])/g, function(url) {
				return '<a href="'+url+'">link</a>';
			}).replace(/\B@([_a-z0-9]+)/ig, function(reply) {
				return reply.charAt(0)+'<a href="http://www.twitter.com/'+reply.substring(1)+'">'+reply.substring(1)+'</a>';
			});
			statusHTML.push('<div style="border-bottom: 1px solid #999"><label>'+status+'</label><p><a style="font-size:85%" href="http://twitter.com/'+username+'/statuses/'+twitters[i].id+'">'+relative_time(twitters[i].created_at)+'</a></p></div>');
		}
		document.getElementById('twitter_update_list').innerHTML += statusHTML.join('');
		document.getElementById('more').style.visibility = 'visible';
	}
}

function twitterLoadNextPage() {
	document.getElementById('more').style.visibility = 'hidden';
	twitterPage++;
	var head = document.getElementsByTagName("head")[0];
	var s = document.createElement("script");
	s.setAttribute("src", 'http://twitter.com/statuses/user_timeline/rpetrich.json?callback=twitterCallback&count=10&page='+twitterPage);
	head.appendChild(s);
}

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';
	}
}