var JAGEX = JAGEX || {};
JAGEX.Twitter2 = function(options){

 var
  _this = this,
  
  options = $.extend({
   rts: true,
   replies: false,
   show: 3,
   timeout: 10000
  }, options)
 ;
 if(typeof(options.failed) !== 'function'){ options.failed = null; }

 
 if(!options.user){ return "No user specified"; }
 if(typeof(options.success) !== 'function'){ return "No output function"; }

 
 var init = function(){
  _this.update();
 }

 
 var displayTweets = function(tweets){

  var out = [];
  
  var now = new Date();

  for(var i = 0; i < tweets.length && i < options.show; i++){

   var tweet = tweets[i];

   var
    text_raw = tweet.text,
    user = tweet.user
   ;

   if(tweet.retweeted_status){
    text_raw = tweet.retweeted_status.text;
    user = tweet.retweeted_status.user;
   }

   
   text = parseTweet(text_raw);

   var created = new Date(tweet.created_at);
   var ago = timeAgo(now, created);

   
   out.push({
    user: {
     name: user.name,
     image: user.profile_image_url,
     image_secure: user.profile_image_url_https,
     description: user.description
    },
    time: created,
    time_ago: ago,
    tweet: text,
    tweet_raw: text_raw
   });

  }

  options.success(out);

 }

 
 var parseTweet = function(tweet){

  /* Many thanks to Simon Whatley for this code, http://www.simonwhatley.co.uk/parsing-twitter-usernames-hashtags-and-urls-with-javascript */

  
  tweet = tweet.replace(/[A-Za-z]+:\/\/[A-Za-z0-9-_]+\.[A-Za-z0-9-_:%&~\?\/.=]+/g, function(url) {
   return url.link(url);
  });

  
  tweet = tweet.replace(/[@]+[A-Za-z0-9-_]+/g, function(u) {
   var username = u.replace("@","")
   return u.link("http://twitter.com/"+username);
  });

  
  tweet = tweet.replace(/[@]+[A-Za-z0-9-_]+/g, function(u) {
   var username = u.replace("@","")
   return u.link("http://twitter.com/"+username);
  });

  
  tweet = tweet.replace(/[#]+[A-Za-z0-9-_]+/g, function(t) {
   var tag = t.replace("#","%23")
   return t.link("http://search.twitter.com/search?q="+tag);
  });

  return tweet;
 }

 
 var timeAgo = function(now,then){
  var
   periods = ["second", "minute", "hour", "day", "week", "month", "year", "decade"],
   lengths = [60,60,24,7,4.35,12,10]
  ;

  var delta = (now - then) / 1000; 

  var i;
  for(i = 0; delta >= lengths[i] && i < lengths.length-1; i++) {
   delta /= lengths[i];
  }

  delta = Math.round(delta);

  return "" + delta + " " + periods[i] + (delta != 1 ? 's' : '');
 }

 var failed = function(reason){
  if(options.error) options.error(reason);
 }

 
 this.update = function(){
  $.ajax({
   url: "https://api.twitter.com/1/statuses/user_timeline.json?screen_name="+options.user+"&count="+options.show+(options.rts ? "&include_rts=1" : "")+(!options.replies ? "&exclude_replies=true" : "")+"&callback=?",
   dataType: 'jsonp',
   success: function(tweets){
    if(tweets.length > 0){
     
     displayTweets(tweets);
    }
    else{
     failed('No tweets');
    }
   },
   error: function(jqXHR,error){
    failed(error);
   },
   timeout: options.timeout
  })
 }

 
 this.options = function(_options){
  options = $.extend(_options, options);
 }

 
 init();

};