/**
 * jQuery TOOLS plugin :: tabs.slideshow 1.0.2
 * 
 * Copyright (c) 2009 Tero Piirainen
 * http://flowplayer.org/tools/tabs.html#slideshow
 *
 * Dual licensed under MIT and GPL 2+ licenses
 * http://www.opensource.org/licenses
 *
 * Launch  : September 2009
 * Date: ${date}
 * Revision: ${revision} 
 */
(function($) {
  
  var t = $.tools.tabs; 
  t.plugins = t.plugins || {}; 
  t.plugins.slideshow = { 
    version: '1.0.2',
    
    // CALLBACKS: onBeforePlay, onPlay, onBeforePause, onPause,  
    conf: {
      next: '.forward',
      prev: '.backward',
      disabledClass: 'disabled',
      autoplay: false,
      autopause: true,
      interval: 3000, 
      clickable: true,
      api: false
    }
  };


  // jQuery plugin implementation
  $.prototype.slideshow = function(conf) {
  
    var globals = $.extend({}, t.plugins.slideshow.conf),
       len = this.length, 
       ret;
       
    conf = $.extend(globals, conf);  
    
    this.each(function() {
      
      var tabs = $(this), api = tabs.tabs(), $api = $(api), ret = api; 
      
      // bind all callbacks from configuration
      $.each(conf, function(name, fn) {
        if ($.isFunction(fn)) { api.bind(name, fn); }
      });
    
      
      function find(query) {
        return len == 1 ? $(query) : tabs.parent().find(query); 
      } 
      
      var nextButton = find(conf.next).click(function() {
        api.next();   
      });
      
      var prevButton = find(conf.prev).click(function() {
        api.prev();   
      });
      
      // interval stuff
      var timer, hoverTimer, startTimer, stopped = false;
  

      // extend the Tabs API with slideshow methods     
      $.extend(api, {
          
        play: function() {
    
          // do not start additional timer if already exists
          if (timer) { return; }
          
          // onBeforePlay
          var e = $.Event("onBeforePlay");
          $api.trigger(e);
          
          if (e.isDefaultPrevented()) { return api; }       
          
          stopped = false;
          
          // construct new timer
          timer = setInterval(api.next, conf.interval);
  
          // onPlay
          $api.trigger("onPlay");       
          
          api.next();
        },
      
        pause: function() {
          
          if (!timer) { return api; }
          
          // onBeforePause
          var e = $.Event("onBeforePause");
          $api.trigger(e);          
          if (e.isDefaultPrevented()) { return api; }   
          
          timer = clearInterval(timer);
          startTimer = clearInterval(startTimer);
          
          // onPause
          $api.trigger("onPause");    
        },
        
        // when stopped - mouseover won't restart 
        stop: function() {          
          api.pause();
          stopped = true; 
        },
        
        onBeforePlay: function(fn) {
          return api.bind("onBeforePlay", fn);
        },
        
        onPlay: function(fn) {
          return api.bind("onPlay", fn);
        },

        onBeforePause: function(fn) {
          return api.bind("onBeforePause", fn);
        },
        
        onPause: function(fn) {
          return api.bind("onPause", fn);
        }
        
      });
  
      
    
      /* when mouse enters, slideshow stops */
      if (conf.autopause) {
        var els = api.getTabs().add(nextButton).add(prevButton).add(api.getPanes());
        
        els.hover(function() {          
          api.pause();          
          hoverTimer = clearInterval(hoverTimer);
          
        }, function() {
          if (!stopped) {           
            hoverTimer = setTimeout(api.play, conf.interval);           
          }
        });
      } 
      
      if (conf.autoplay) {
        startTimer = setTimeout(api.play, conf.interval);       
      } else {
        api.stop(); 
      }
      
      if (conf.clickable) {
        api.getPanes().click(function()  {
          api.next();
        });
      } 
      
      // manage disabling of next/prev buttons
      if (!api.getConf().rotate) {
        
        var cls = conf.disabledClass;
        
        if (!api.getIndex()) {
          prevButton.addClass(cls);
        }
        api.onBeforeClick(function(e, i)  {
          if (!i) {
            prevButton.addClass(cls);
          } else {
            prevButton.removeClass(cls);  
          
            if (i == api.getTabs().length -1) {
              nextButton.addClass(cls);
            } else {
              nextButton.removeClass(cls);  
            }
          }
        });
      }
      
    });
    
    return conf.api ? ret : this;
  };
  
})(jQuery);