/**
 * @license 
 * jQuery Tools @VERSION / Scrollable Autoscroll
 * 
 * NO COPYRIGHTS OR LICENSES. DO WHAT YOU LIKE.
 * 
 * http://flowplayer.org/tools/scrollable/autoscroll.html
 *
 * Since: September 2009
 * Date: @DATE 
 */
(function($) {    

  var t = $.tools.scrollable; 
  
  t.autoscroll = {
    
    conf: {
      autoplay: true,
      interval: 3000,
      autopause: true
    }
  };  
  
  // jQuery plugin implementation
  $.fn.autoscroll = function(conf) { 

    if (typeof conf == 'number') {
      conf = {interval: conf};  
    }
    
    var opts = $.extend({}, t.autoscroll.conf, conf), ret;
    
    this.each(function() {    
        
      var api = $(this).data("scrollable"),
          root = api.getRoot(),
          // interval stuff
          timer, stopped = false;

      /**
      *
      *   Function to run autoscroll through event binding rather than setInterval
      *   Fixes this bug: http://flowplayer.org/tools/forum/25/72029
      */
      function scroll(){        
        timer = setTimeout(function(){
          api.next();
        }, opts.interval);
      }
          
      if (api) { ret = api; }
      
      api.play = function() { 
        
        // do not start additional timer if already exists
        if (timer) { return; }
        
        stopped = false;
        
        root.bind('onSeek', scroll);
        scroll();
      };  

      api.pause = function() {
        timer = clearTimeout(timer);  // clear any queued items immediately
        root.unbind('onSeek', scroll);
      };
      
      // resume playing if not stopped
      api.resume = function() {
        stopped || api.play();
      };
      
      // when stopped - mouseover won't restart 
      api.stop = function() {
        stopped = true;
        api.pause();
      };
    
      /* when mouse enters, autoscroll stops */
      if (opts.autopause) {
        root.add(api.getNaviButtons()).hover(api.pause, api.resume);
      }
      
      if (opts.autoplay) {
        api.play();        
      }

    });
    
    return opts.api ? ret : this;
    
  }; 
  
})(jQuery);