/**
 * jQuery TOOLS plugin :: scrollable.autoscroll 1.0.1
 * 
 * Copyright (c) 2009 Tero Piirainen
 * http://flowplayer.org/tools/scrollable.html#autoscroll
 *
 * Dual licensed under MIT and GPL 2+ licenses
 * http://www.opensource.org/licenses
 *
 * Launch  : September 2009
 * Date: ${date}
 * Revision: ${revision} 
 */
(function($) {    

  var t = $.tools.scrollable; 
  t.plugins = t.plugins || {};
  
  t.plugins.autoscroll = {
    version: '1.0.1',
    
    conf: {
      autoplay: true,
      interval: 3000,
      autopause: true,
      steps: 1,
      api: false
    }
  };  
  
  // jQuery plugin implementation
  $.fn.autoscroll = function(conf) { 

    if (typeof conf == 'number') {
      conf = {interval: conf};  
    }
    
    var opts = $.extend({}, t.plugins.autoscroll.conf), ret;
    $.extend(opts, conf);     
    
    this.each(function() {    
        
      var api = $(this).scrollable();     
      if (api) { ret = api; }
      
      // interval stuff
      var timer, hoverTimer, stopped = true;
  
      api.play = function() {
  
        // do not start additional timer if already exists
        if (timer) { return; }
        
        stopped = false;
        
        // construct new timer
        timer = setInterval(function() { 
          api.move(opts.steps);       
        }, opts.interval);
        
        api.move(opts.steps);
      };  

      api.pause = function() {
        timer = clearInterval(timer); 
      };
      
      // when stopped - mouseover won't restart 
      api.stop = function() {
        api.pause();
        stopped = true; 
      };
    
      /* when mouse enters, autoscroll stops */
      if (opts.autopause) {
        api.getRoot().add(api.getNaviButtons()).hover(function() {      
          api.pause();
          clearInterval(hoverTimer);
          
        }, function() {
          if (!stopped) {           
            hoverTimer = setTimeout(api.play, opts.interval);           
          }
        });
      }     
      
      if (opts.autoplay) {
        setTimeout(api.play, opts.interval);        
      }

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