(function($) {
    var defaults = {
        username : 'Twitter',
        slides : 5,
        baseURL: 'https://api.twitter.com/1/statuses/user_timeline.json',
        width : 840,
        speed : 'fast',
        refreshTime : 600000      
    };
    var storage = {
        store: {},
        init: function(element) {
            storage.element = element;
            if (!storage.element.hasClass('tweet_slider'))
                {
                    storage.element.addClass('tweet_slider')
                }
            storage.element.data('currslide',new Number(1));
            
             //$('<h4></h4>').html('We Tweet').prependTo(storage.element);
       storage.tweets_container = $('<ul></ul>');
       storage.tweets_container.appendTo(storage.element);
        },
        grab_tweets: function(options)
        {
             $.getJSON(options.baseURL+"?callback=?","&screen_name="+options.username+"&count="+options.slides,function(data)
            {            
             storage.store.tweets = data;
             storage.build_display();
             storage.addButtons(1);
             storage.element.css('width', options.width + 'px');
             storage.csswidth = data.length * options.width;
             storage.twidth = storage.csswidth - options.width;
             storage.tweets_container.css('width',storage.csswidth + 'px');
            });
            setTimeout(storage.refresh,options.refreshTime);
        },
        build_display: function() {
        if (typeof(storage.slides) != "undefined" && storage.slides.length > 0)
        {
                 storage.tweets_container.html('').fadeIn('fast');
        }
        var tweets = storage.store.tweets;
        var exp = /(\b(https?|ftp|file):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])/ig;
        for (i in tweets)
        {

            var tweet_html = $('<li></li>');
            tweet_html.css('width', options.width + 'px')
            .append('<div><img align="left" src="' + tweets[i].user.profile_image_url + '" />');
            tweet_html.append('<span>' + tweets[i].text.replace(exp,"<a href='$1'>$1</a>") + '</span>')
            .append('<p><a href="http://www.twitter.com/'
            + tweets[i].user.screen_name + '" target="_blank">' + relative_time(tweets[i].created_at) +'&nbsp;&nbsp;@' + tweets[i].user.screen_name +' on twitter</a></p></div>')
            .appendTo(storage.tweets_container);
			
        }
        if ($(".controls").length < 1)
            {
        storage.controls = $('<div class="controls"></div>').hide('fast');
        storage.prevButton = $('<a href="#" class="prevButton"></a>');
        storage.prevButton.bind('click.tweetslider',function(e) {
                                     e.preventDefault();
                                     clearInterval(storage.timer);
                                     storage.timer = setInterval(storage.slide,10000);
                                     storage.slide("prevSlide");
                                 });
        storage.nextButton = $('<a href="#" class="nextButton"></a>');
        storage.nextButton.bind('click.tweetslider',function(e) {
                                     e.preventDefault();
                                     clearInterval(storage.timer);
                                     storage.timer = setInterval(storage.slide,10000);
                                     storage.slide("nextSlide");
                                 });
                                  storage.nextButton.hide().appendTo(storage.controls);
        storage.prevButton.hide().appendTo(storage.controls);
       
        storage.controls.show('fast').appendTo(storage.element);

        }
        else {
            storage.controls.show('fast');
        }
            $(storage.element).css('height','auto');
               while (i < tweets.length + 10)
               {
                    if (i > tweets.length)
                    {
                        storage.timer = setInterval(storage.slide,10000);
                        break;
                    }
                   i++;
                }
       },
       refresh: function() {
           clearInterval(storage.timer);
           delete storage.timer;
           storage.slide("reset");
           storage.tweets_container.fadeOut('fast',function() {storage.controls.hide('fast');storage.grab_tweets(options);})
             return;
       },
       slide: function(operation) {
       storage.slides = storage.element.find('li');
       var total_width = -storage.twidth;
       var currpos = parseInt(storage.slides.css('left'));
       if (operation == "nextSlide")
           {
               var newpos = currpos - options.width;
                                storage.slides.stop(true,true).animate({
                                left: newpos+'px'
                            },options.speed);

                                var cs = (storage.element.data('currslide') + 1);
                              storage.addButtons(cs);
                              storage.element.data('currslide',cs);
           }
           else if (operation == "prevSlide")
               {
                   var newpos = currpos + options.width;
                                storage.slides.stop(true,true).animate({
                                left: newpos+'px'
                            },options.speed);

                                var cs = (storage.element.data('currslide') - 1);
                              storage.addButtons(cs);
                              storage.element.data('currslide',cs);
               }
               else if (operation == "reset")
                   {
                       storage.slides.stop(true,true).animate({
                                left: '0px'
                                   },options.speed);
                                       cs = 1;
                                storage.element.data('currslide',cs);
                   }
               else {
                 if (currpos > total_width)
                        {
                             var newpos = currpos - options.width;
                                storage.slides.stop(true,true).animate({
                                left: newpos+'px'
                            },options.speed);
                           
                                var cs = (storage.element.data('currslide') + 1);
                              storage.addButtons(cs);
                              storage.element.data('currslide',cs);
                                
                        }
                        else
                        {
                               storage.slides.stop(true,true).animate({
                                left: '0px'
                                   },options.speed);
                                       cs = 1;
                                storage.addButtons(cs);
                                storage.element.data('currslide',cs);
                                  
                        }
               }
                      },
                      addButtons: function(currslide) {
                         // var imgButton = $('<a></a>');
                          if (storage.tweets_container.find('li').length > 1)
                          {
                              if (currslide < storage.tweets_container.find('li').length)
                              {
                                 
                                storage.nextButton.show();
                                     
                              }
                              if (currslide > 1 )
                              {
                                  
                                storage.prevButton.show();
                                      
                              }
                              if (currslide == storage.tweets_container.find('li').length)
                                  {
                                     
                                 //storage.nextButton.hide();
                                    
                                  }
                                   if (currslide == 1)
                                  {
                                     
                                 //storage.prevButton.hide();
                                     
                                  }
                          }
                      }
        };

     $.fn.tweetSlider = function(opts) {
        options = $.extend(defaults,opts);
        var $this = this;
            return this.each(function() {
                storage.init($this);
                storage.grab_tweets(options);
             
            });
    }
})(jQuery);

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';
  }
}