/**
 * @license 
 * jQuery Tools 1.2.5 Slideshow - Extend it.
 * 
 * NO COPYRIGHTS OR LICENSES. DO WHAT YOU LIKE.
 * 
 * http://flowplayer.org/tools/tabs/slideshow.html
 *
 * Since: September 2009
 * Date:    Wed Sep 22 06:02:10 2010 +0000 
 */
(function($) {
    
    var tool;
    
    tool = $.tools.tabs.slideshow = { 

        conf: {
            next: '.forward',
            prev: '.backward',
            disabledClass: 'disabled',
            autoplay: false,
            autopause: true,
            interval: 6000, 
            clickable: false,
            api: false
        }
    };  
    
    function Slideshow(root, conf) {
    
        var self = this,
             fire = root.add(this),
             tabs = root.data("tabs"),
             timer, 
             stopped = true;
        
             
        // next / prev buttons
        function find(query) {
            var el = $(query);
            return el.length < 2 ? el : root.parent().find(query);  
        }   
        
        var nextButton = find(conf.next).click(function() {
            tabs.next();        
        });
        
        var prevButton = find(conf.prev).click(function() {
            tabs.prev();        
        }); 


        // extend the Tabs API with slideshow methods           
        $.extend(self, {
                
            // return tabs API
            getTabs: function() {
                return tabs;    
            },
            
            getConf: function() {
                return conf;    
            },
                
            play: function() {
    
                // do not start additional timer if already exists
                if (timer) { return self; } 
                
                // onBeforePlay
                var e = $.Event("onBeforePlay");
                fire.trigger(e);                
                if (e.isDefaultPrevented()) { return self; }                
                
                
                // construct new timer
                timer = setInterval(tabs.next, conf.interval);
                stopped = false;                
                
                // onPlay
                fire.trigger("onPlay");             
                
                return self;
            },
        
            pause: function() {
                
                if (!timer) { return self; }

                // onBeforePause
                var e = $.Event("onBeforePause");
                fire.trigger(e);                    
                if (e.isDefaultPrevented()) { return self; }        
                
                timer = clearInterval(timer);
                
                // onPause
                fire.trigger("onPause");    
                
                return self;
            },
            
            // when stopped - mouseover won't restart 
            stop: function() {                  
                self.pause();
                stopped = true; 
            }
            
        });

        // callbacks    
        $.each("onBeforePlay,onPlay,onBeforePause,onPause".split(","), function(i, name) {
                
            // configuration
            if ($.isFunction(conf[name]))  {
                $(self).bind(name, conf[name]); 
            }
            
            // API methods              
            self[name] = function(fn) {
                return $(self).bind(name, fn);
            };
        }); 
        
    
        /* when mouse enters, slideshow stops */
        if (conf.autopause) {
            tabs.getTabs().add(nextButton).add(prevButton).add(tabs.getPanes()).hover(self.pause, function() {
                if (!stopped) { self.play(); }      
            });
        } 
        
        if (conf.autoplay) {
            self.play();    
        }
        
        if (conf.clickable) {
            tabs.getPanes().click(function()  {
                tabs.next();
            });
        } 
        
        // manage disabling of next/prev buttons
        if (!tabs.getConf().rotate) {
            
            var disabled = conf.disabledClass;
            
            if (!tabs.getIndex()) {
                prevButton.addClass(disabled);
            }
            
            tabs.onBeforeClick(function(e, i)  { 
                prevButton.toggleClass(disabled, !i);
                nextButton.toggleClass(disabled, i == tabs.getTabs().length -1); 
            });
        }  
    }
    
    // jQuery plugin implementation
    $.fn.slideshow = function(conf) {
    
        // return existing instance
        var el = this.data("slideshow");
        if (el) { return el; }
 
        conf = $.extend({}, tool.conf, conf);       
        
        this.each(function() {
            el = new Slideshow($(this), conf);
            $(this).data("slideshow", el);          
        }); 
        
        return conf.api ? el : this;
    };
    
})(jQuery);