(function($) {
  /*
    jquery.twitter.js v1.0
    Last updated: 25 April 2009

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

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

  $.fn.getTwitter = function(options) {
    var o = $.extend({}, $.fn.getTwitter.defaults, options);
  
    // hide container element
    $(this).hide();
  
    // add heading to container element
    if (o.showHeading) {
      $(this).append('<h2>'+o.headingText+'</h2>');
    }

    // add twitter list to container element
    $(this).append('<ul id="twitter_update_list"><li></li></ul>');

    // hide twitter list
    $("ul#twitter_update_list").hide();

    // add preLoader to container element
    var pl = $('<p id="'+o.preloaderId+'">'+o.loaderText+'</p>');
    $(this).append(pl);

    // add Twitter profile link to container element
    if (o.showProfileLink) {
      $(this).append('<a id="profileLink" href="http://twitter.com/'+o.userName+'">http://twitter.com/'+o.userName+'</a>');
    }

    // show container element
    $(this).show();
    
    $.getJSON("http://twitter.com/statuses/user_timeline/"+o.userName+".json?count="+(o.numTweets+10)+"&callback=?", 
      function(tweets) {
        
      // remove preLoader from container element
      $(pl).remove();

      if (o.rejectRepliesOutOf) {
    	  tweets = $.grep(tweets, function(tweet) { return !tweet.in_reply_to_user_id; }).slice(0, o.numTweets);
    	}
    	  
      var statusHTML = [];
      for (var i=0; i<tweets.length; i++){
        var username = tweets[i].user.screen_name;
        var status = tweets[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/'+tweets[i].id+'">'+
            $.fn.getTwitter.relative_time(tweets[i].created_at)+
          '</a></li>');
      }
      document.getElementById('twitter_update_list').innerHTML = statusHTML.join('');
      
      // show twitter list
      if (o.slideIn) {
        $("ul#twitter_update_list").slideDown(1000);
      }
      else {
        $("ul#twitter_update_list").show();
      }

      // give first list item a special class
      $("ul#twitter_update_list li:first").addClass("firstTweet");

      // give last list item a special class
      $("ul#twitter_update_list li:last").addClass("lastTweet");
    });
  };
  
  // plugin defaults
  $.fn.getTwitter.defaults = {
    userName: null,
    numTweets: 3,
    preloaderId: "preloader",
    loaderText: "Loading tweets...",
    slideIn: false,
    showHeading: true,
    headingText: "Latest Tweets",
    showProfileLink: true,
    rejectRepliesOutOf: false
  };
  
  $.fn.getTwitter.relative_time = function(time_value) {
    var parsed_date = null;
    
    if (time_value instanceof Date) {
      parsed_date = time_value;
    } else {
      var values = time_value.split(" ");
      time_value = values[1] + " " + values[2] + ", " + values[5] + " " + values[3];
      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, 10);
    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, 10)).toString() + ' minutes ago';
    } else if(delta < (120*60)) {
      return 'about an hour ago';
    } else if(delta < (24*60*60)) {
      return 'about ' + (parseInt(delta / 3600, 10).toString() + ' hours ago');
    } else if(delta < (48*60*60)) {
      return '1 day ago';
    } else {
      return (parseInt(delta / 86400, 10)).toString() + ' days ago';
    }
  }
  
})(jQuery);