(function($) {

  $.fn.tweet = function(o){
	var s = $.extend({
	  username: ["cancernm"],                // [string]   required, unless you want to display our tweets. :) it can be an array, just do ["username1","username2","etc"]
	  list: null,                               // [string]   optional name of list belonging to username
	  favorites: false,                         // [boolean]  display the user's favorites instead of his tweets
	  avatar_size: null,                        // [integer]  height and width of avatar if displayed (48px max)
	  count: 3,                                 // [integer]  how many tweets to display?
	  fetch: null,                              // [integer]  how many tweets to fetch via the API (set this higher than 'count' if using the 'filter' option)
	  intro_text: null,                         // [string]   do you want text BEFORE your your tweets?
	  outro_text: null,                         // [string]   do you want text AFTER your tweets?
	  join_text:  null,                         // [string]   optional text in between date and tweet, try setting to "auto"
	  auto_join_text_default: "i said,",        // [string]   auto text for non verb: "i said" bullocks
	  auto_join_text_ed: "i",                   // [string]   auto text for past tense: "i" surfed
	  auto_join_text_ing: "i am",               // [string]   auto tense for present tense: "i was" surfing
	  auto_join_text_reply: "i replied to",     // [string]   auto tense for replies: "i replied to" @someone "with"
	  auto_join_text_url: "i was looking at",   // [string]   auto tense for urls: "i was looking at" http:...
	  loading_text: null,                       // [string]   optional loading text, displayed while tweets load
	  query: null,                              // [string]   optional search query
	  refresh_interval: null ,                  // [integer]  optional number of seconds after which to reload tweets
	  twitter_url: "twitter.com",               // [string]   custom twitter url, if any (apigee, etc.)
	  twitter_api_url: "api.twitter.com",       // [string]   custom twitter api url, if any (apigee, etc.)
	  twitter_search_url: "search.twitter.com", // [string]   custom twitter search url, if any (apigee, etc.)
	  template: "{avatar}{time}{join}{text}",   // [string or function] template used to construct each tweet <li> - see code for available vars
	  comparator: function(tweet1, tweet2) {    // [function] comparator used to sort tweets (see Array.sort)
		return tweet2["tweet_time"] - tweet1["tweet_time"];
	  },
	  filter: function(tweet) {                 // [function] whether or not to include a particular tweet (be sure to also set 'fetch')
		return true;
	  }
	}, o);

	$.fn.extend({
	  linkUrl: function() {
		var returning = [];
		// See http://daringfireball.net/2010/07/improved_regex_for_matching_urls
		var regexp = /\b((?:[a-z][\w-]+:(?:\/{1,3}|[a-z0-9%])|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}\/)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:'".,<>?«»“�‘’]))/gi;
		this.each(function() {
		  returning.push(this.replace(regexp,
									  function(match) {
										var url = (/^[a-z]+:/i).test(match) ? match : "http://"+match;
										return "<a href=\""+url+"\">"+match+"</a>";
									  }));
		});
		return $(returning);
	  },
	  linkUser: function() {
		var returning = [];
		var regexp = /[\@]+([A-Za-z0-9-_]+)/gi;
		this.each(function() {
		  returning.push(this.replace(regexp,"<a href=\"http://"+s.twitter_url+"/$1\">@$1</a>"));        });
		return $(returning);
	  },
	  linkHash: function() {
		var returning = [];
		var regexp = /(?:^| )[\#]+([A-Za-z0-9-_]+)/gi;
		this.each(function() {
		  returning.push(this.replace(regexp, ' <a href="http://'+s.twitter_search_url+'/search?q=&tag=$1&lang=all&from='+s.username.join("%2BOR%2B")+'">#$1</a>'));
		});
		return $(returning);
	  },
	  capAwesome: function() {
		var returning = [];
		this.each(function() {
		  returning.push(this.replace(/\b(awesome)\b/gi, '<span class="awesome">$1</span>'));
		});
		return $(returning);
	  },
	  capEpic: function() {
		var returning = [];
		this.each(function() {
		  returning.push(this.replace(/\b(epic)\b/gi, '<span class="epic">$1</span>'));
		});
		return $(returning);
	  },
	  makeHeart: function() {
		var returning = [];
		this.each(function() {
		  returning.push(this.replace(/(&lt;)+[3]/gi, "<tt class='heart'>&#x2665;</tt>"));
		});
		return $(returning);
	  }
	});

	function parse_date(date_str) {
	  // The non-search twitter APIs return inconsistently-formatted dates, which Date.parse
	  // cannot handle in IE. We therefore perform the following transformation:
	  // "Wed Apr 29 08:53:31 +0000 2009" => "Wed, Apr 29 2009 08:53:31 +0000"
	  return Date.parse(date_str.replace(/^([a-z]{3})( [a-z]{3} \d\d?)(.*)( \d{4})$/i, '$1,$2$4$3'));
	}

	function relative_time(date) {
	  var relative_to = (arguments.length > 1) ? arguments[1] : new Date();
	  var delta = parseInt((relative_to.getTime() - date) / 1000, 10);
	  var r = '';
	  if (delta < 60) {
		r = delta + ' seconds ago';
	  } else if(delta < 120) {
		r = 'a minute ago';
	  } else if(delta < (45*60)) {
		r = (parseInt(delta / 60, 10)).toString() + ' minutes ago';
	  } else if(delta < (2*60*60)) {
		r = 'an hour ago';
	  } else if(delta < (24*60*60)) {
		r = '' + (parseInt(delta / 3600, 10)).toString() + ' hours ago';
	  } else if(delta < (48*60*60)) {
		r = 'a day ago';
	  } else {
		r = (parseInt(delta / 86400, 10)).toString() + ' days ago';
	  }
	  return 'about ' + r;
	}

	function build_url() {
	  var proto = ('https:' == document.location.protocol ? 'https:' : 'http:');
	  var count = (s.fetch === null) ? s.count : s.fetch;
	  if (s.list) {
		return proto+"//"+s.twitter_api_url+"/1/"+s.username[0]+"/lists/"+s.list+"/statuses.json?per_page="+count+"&callback=?";
	  } else if (s.favorites) {
		return proto+"//"+s.twitter_api_url+"/favorites/"+s.username[0]+".json?count="+s.count+"&callback=?";
	  } else if (s.query === null && s.username.length == 1) {
		return proto+'//'+s.twitter_api_url+'/1/statuses/user_timeline.json?screen_name='+s.username[0]+'&count='+count+'&include_rts=1&callback=?';
	  } else {
		var query = (s.query || 'from:'+s.username.join(' OR from:'));
		return proto+'//'+s.twitter_search_url+'/search.json?&q='+encodeURIComponent(query)+'&rpp='+count+'&callback=?';
	  }
	}

	return this.each(function(i, widget){
	  var list = $('<ul class="tweet_list">').appendTo(widget);
	  var intro = '<p class="tweet_intro">'+s.intro_text+'</p>';
	  var outro = '<p class="tweet_outro">'+s.outro_text+'</p>';
	  var loading = $('<p class="loading">'+s.loading_text+'</p>');

	  if(typeof(s.username) == "string"){
		s.username = [s.username];
	  }

	  var expand_template = function(info) {
		if (typeof s.template === "string") {
		  var result = s.template;
		  for(var key in info)
			result = result.replace(new RegExp('{'+key+'}','g'), info[key]);
		  return result;
		} else return s.template(info);
	  };

	  if (s.loading_text) $(widget).append(loading);
	  $(widget).bind("load", function(){
		$.getJSON(build_url(), function(data){
		  if (s.loading_text) loading.remove();
		  if (s.intro_text) list.before(intro);
		  list.empty();

		  var tweets = $.map(data.results || data, function(item){
			var join_text = s.join_text;

			// auto join text based on verb tense and content
			if (s.join_text == "auto") {
			  if (item.text.match(/^(@([A-Za-z0-9-_]+)) .*/i)) {
				join_text = s.auto_join_text_reply;
			  } else if (item.text.match(/(^\w+:\/\/[A-Za-z0-9-_]+\.[A-Za-z0-9-_:%&\?\/.=]+) .*/i)) {
				join_text = s.auto_join_text_url;
			  } else if (item.text.match(/^((\w+ed)|just) .*/im)) {
				join_text = s.auto_join_text_ed;
			  } else if (item.text.match(/^(\w*ing) .*/i)) {
				join_text = s.auto_join_text_ing;
			  } else {
				join_text = s.auto_join_text_default;
			  }
			}

			// Basic building blocks for constructing tweet <li> using a template
			var screen_name = item.from_user || item.user.screen_name;
			var source = item.source;
			var user_url = "http://"+s.twitter_url+"/"+screen_name;
			var avatar_size = s.avatar_size;
			var avatar_url = item.profile_image_url || item.user.profile_image_url;
			var tweet_url = "http://"+s.twitter_url+"/"+screen_name+"/statuses/"+item.id_str;
			var tweet_time = parse_date(item.created_at);
			var tweet_relative_time = relative_time(tweet_time);
			var tweet_raw_text = item.text;
			var tweet_text = $([tweet_raw_text]).linkUrl().linkUser().linkHash()[0];

			// Default spans, and pre-formatted blocks for common layouts
			var user = '<a class="tweet_user" href="'+user_url+'">'+screen_name+'</a>';
			var join = ((s.join_text) ? ('<span class="tweet_join"> '+join_text+' </span>') : ' ');
			var avatar = (avatar_size ?
						  ('<a class="tweet_avatar" href="'+user_url+'"><img src="'+avatar_url+
						   '" height="'+avatar_size+'" width="'+avatar_size+
						   '" alt="'+screen_name+'\'s avatar" title="'+screen_name+'\'s avatar" border="0"/></a>') : '');
			var time = '<span class="tweet_time"><a href="'+tweet_url+'" title="view tweet on twitter">'+tweet_relative_time+'</a></span>';
			var text = '<span class="tweet_text">'+$([tweet_text]).makeHeart().capAwesome().capEpic()[0]+ '</span>';

			return { item: item, // For advanced users who want to dig out other info
					 screen_name: screen_name,
					 user_url: user_url,
					 avatar_size: avatar_size,
					 avatar_url: avatar_url,
					 source: source,
					 tweet_url: tweet_url,
					 tweet_time: tweet_time,
					 tweet_relative_time: tweet_relative_time,
					 tweet_raw_text: tweet_raw_text,
					 tweet_text: tweet_text,
					 user: user,
					 join: join,
					 avatar: avatar,
					 time: time,
					 text: text
				   };
		  });

		  tweets = $.grep(tweets, s.filter).slice(0, s.count);
		  list.append($.map(tweets.sort(s.comparator),
							function(t) { return "<li>" + expand_template(t) + "</li>"; }).join('')).
			  children('li:first').addClass('tweet_first').end().
			  children('li:odd').addClass('tweet_even').end().
			  children('li:even').addClass('tweet_odd');

		  if (s.outro_text) list.after(outro);
		  $(widget).trigger("loaded").trigger((tweets.length === 0 ? "empty" : "full"));
		  if (s.refresh_interval) {
			window.setTimeout(function() { $(widget).trigger("load"); }, 1000 * s.refresh_interval);
		  }
		});
	  }).trigger("load");
	});
  };
})(jQuery);