//taken 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';
  }
}

(function($) {
	
	function twitterCallback2(twitters) {
		var statusHTML = [];
		//for (var i=0; i<twitters.length; i++){
	  
		var i=0;
		
		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>';
		});

		var checkstatus = status.replace(/<a.*?>/g,"");

		var anchorPos = checkstatus.indexOf('</a>');
		var sub = checkstatus.substr(anchorPos + 4, checkstatus.length - anchorPos);
		
		var anch2Pos = parseInt(sub.indexOf('</a>') + anchorPos + 4);
		if (anch2Pos) anchorPos = anch2Pos;
		checkstatus = checkstatus.replace(/<\/a>/g,"");
		
		if (checkstatus.length > 120) {
			if (anchorPos == 0){ //no link here.
				status = status.substr(0,120);
				//alert("no link status = "+status);
			}else if (anchorPos > 120) { //the link lies past allowable length, remove it
				status = status.substring(0,status.lastIndexOf("<a"));
			}else {
				//alert(status.length - checkstatus.length);
				//alert("default " +status);
				
				status = status.substr(0,parseInt(120 + status.length - checkstatus.length));
				//alert(status.length);
			}
			status += '...';
		}
		statusHTML.push('<li><span>'+status+'</span> <a style="font-size:85%" href="http://twitter.com/'+username+'/statuses/'+twitters[i].id+'">'+relative_time(twitters[i].created_at)+'</a></li>');
	  //}
	  
	  $('#twitter_update_list').html(statusHTML.join(''));
	  
	}
	
	/*
		jquery.twitter.js v1.5
		Last updated: 08 July 2009

		Created by Damien du Toit
		http://coda.co.za/blog/2008/10/26/jquery-plugin-for-twitter

		Licensed under a Creative Commons Attribution-Non-Commercial 3.0 Unported License
		http://creativecommons.org/licenses/by-nc/3.0/
	*/

	$.fn.getTwitter = function(options) {
		
		$.fn.getTwitter.defaults = {
			userName: null,
			numTweets: 5,
			loaderText: "Loading tweets...",
			slideIn: true,
			slideDuration: 750,
			showHeading: true,
			headingText: "Latest Tweets",
			showProfileLink: false,
			showTimestamp: true
		};

		var o = $.extend({}, $.fn.getTwitter.defaults, options);
		
		return this.each(function() {
			var c = $(this);
			
			// hide container element, remove alternative content, and add class
			c.hide().empty().addClass("twitted");

			// add heading to container element
			if (o.showHeading) {
				c.append("<h2>"+o.headingText+"</h2>");
			}

			// add twitter list to container element
			var twitterListHTML = "<ul id=\"twitter_update_list\"><li></li></ul>";
			c.append(twitterListHTML);

			var tl = $("#twitter_update_list");

			// hide twitter list
			tl.hide();

			// add preLoader to container element
			var preLoaderHTML = $("<p class=\"preLoader\">"+o.loaderText+"</p>");
			c.append(preLoaderHTML);

			// add Twitter profile link to container element
			if (o.showProfileLink) {
				var profileLinkHTML = "<p class=\"profileLink\"><a href=\"http://twitter.com/"+o.userName+"\">http://twitter.com/"+o.userName+"</a></p>";
				c.append(profileLinkHTML);
			}

			// show container element
			c.show();
			
			$.getJSON("home/getTwitter",function(data){
				twitterCallback2(data);
			
				// remove preLoader from container element
				$(preLoaderHTML).remove();

				// remove timestamp and move to title of list item
				if (!o.showTimestamp) {
					tl.find("li").each(function() {
						var timestampHTML = $(this).children("a");
						var timestamp = timestampHTML.html();
						timestampHTML.remove();
						$(this).attr("title", timestamp);
					});
				}			
				
				
				// show twitter list
				if (o.slideIn) {
					// a fix for the jQuery slide effect
					// Hat-tip: http://blog.pengoworks.com/index.cfm/2009/4/21/Fixing-jQuerys-slideDown-effect-ie-Jumpy-Animation
					var tlHeight = tl.data("originalHeight");

					// get the original height
					if (!tlHeight) {
						tlHeight = tl.show().height();
						tl.data("originalHeight", tlHeight);
						tl.hide().css({height: 0});
					}

					tl.show().animate({height: tlHeight}, o.slideDuration);
				}
				else {
					tl.show();
				}
				c.append(tl);
				// add unique class to first list item
				tl.find("li:first").addClass("firstTweet");

				// add unique class to last list item
				tl.find("li:last").addClass("lastTweet");
				
				//alert($('#twitter').html());
			});
		});
	};
})(jQuery);