/**
* @license
* jQuery Tools @VERSION Slideshow - Extend it.
*
* NO COPYRIGHTS OR LICENSES. DO WHAT YOU LIKE.
*
* http://flowplayer.org/tools/tabs/slideshow.html
*
* Since: September 2009
* Date: @DATE
*/
(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);