// Called when the current page is loaded.
function site_document_loaded() {
	$("a[rel='lightbox']").lightBox(); // Select all links that contains lightbox in the attribute rel

	// Hook up the lavalamp effect.
	$('ul#siteTopNavLinksList').lavaLamp({fx: 'easeInOutBack', speed: 500, returnHome: true});
}

// Dyanmically loads the specified js file.
function loadJSFile(filepath) {
	var scriptElement = document.createElement("script");
	scriptElement.type = "text/javascript";
	scriptElement.src = filepath;
	$("head").append(scriptElement);
}

function showTwitterUpdates(linkObject) {
	$(linkObject).remove();
	$("#twitter_div").slideDown();

	loadJSFile("http://twitter.com/statuses/user_timeline/farhanahmad.json?callback=tweetsLoaded&count=4");
	return false;
}

function tweetsLoaded(twitter) {
	twitterCallback2(twitter);
	$("#twitterUpdatesLoading").hide();
}

// **** Following two functions are from http://twitter.com/javascripts/blogger.js ****/
// This used to be called by the twitter json callback, but now it called by my customer
// tweetsLoaded function above.
function twitterCallback2(twitters) {
  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+'">'+url+'</a>';
    }).replace(/\B@([_a-z0-9]+)/ig, function(reply) {
      return  reply.charAt(0)+'<a href="http://twitter.com/'+reply.substring(1)+'">'+reply.substring(1)+'</a>';
    });
    statusHTML.push('<li><span>'+status+'</span> <a style="font-size:85%" href="http://twitter.com/'+username+'/statuses/'+twitters[i].id_str+'">'+relative_time(twitters[i].created_at)+'</a></li>');
  }
  document.getElementById('twitter_update_list').innerHTML = statusHTML.join('');
}

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';
  }
}

// Scrolls the specified element to the top.
function scrollTo(element) {
	$("html, body").animate({ scrollTop: element.offset().top }, 1500);
}