/**
* @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: 5000,
            /*clickable: true,*/
            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);