/**
 *	Basic Slideshow App
 *
 *	Plagerised from Tom Doyle by Isotope Communications Ltd, Dec 2008
 *	http://www.tomdoyletalk.com/2008/10/28/simple-image-gallery-slideshow-with-scriptaculous-and-prototype/
 *
 *	Published [16/12/08]:
 *	http://www.icommunicate.co.uk/articles/all/simple_slide_show_for_prototype_scriptaculous_38/
 *
 *	Changes: Basically made it an object so that you can run multiple instances and so that
 *			 it doesn't get interfered with by other scripts on the page.
 *
 *			 Have also added a few things, like "Captions" and the option of changing the
 *			 effects..
 *
 *	Example:
 *			Event.observe(window, 'load', function(){
 *				oMySlides = new iSlideShow({
 *					autostart 	: true		// optional, boolean (default:true)
 *					start		: 0,	 	// optional, slides[start] (default:0)
 *					wait 		: 4000, 	// optional, milliseconds (default:4s)
 *					slides 		: [
 *						'image-div-a',
 *						'image-div-b',
 *						'image-div-c',
 *						'image-div-d'
 *					],
 *					counter		: 'counter-div-id', // optional...
 *					caption 	: 'caption-div-id', // optional...
 *					playButton	: 'PlayButton', 	// optional (default:playButton)
 *					pauseButton	: 'PauseButton', 	// optional (default:PauseButton)
 *				});
 *				oMySlides.startSlideShow();
 *			});
 *
 *			To start the slideshow:
 *				oMySlides.startSlideShow();
 *
 *			To skip forward, back, stop:
 *				oMySlides.goNext();
 *				oMySlides.goPrevious();
 *				oMySlides.stop();
 */

var iSlideShow = new Class.create();

iSlideShow.prototype = {

	initialize : function (oArgs) {
		return;
		this.wait 			= oArgs.wait ? oArgs.wait : 4000;
		this.start 			= oArgs.start ? oArgs.start : 0;
		this.duration		= oArgs.duration ? oArgs.duration : 0.9;
		this.autostart		= (typeof(oArgs.autostart)=='undefined') ? true : oArgs.autostart;
		this.slides 		= oArgs.slides;
		this.counter		= oArgs.counter;
		this.caption		= oArgs.caption;
		this.playButton		= oArgs.playButton ? oArgs.playButton : 'PlayButton';
		this.pauseButton	= oArgs.pauseButton ? oArgs.pauseButton : 'PauseButton';
		this.iImageId		= this.start;
		if ( this.slides ) {
			this.numOfImages	= this.slides.length;
			if ( !this.numOfImages ) {
				alert('No slides?');
			}
		}
		if ( this.autostart ) {
			this.startSlideShow();
		}
	},

	// The Fade Function
	swapImage: function (x,y) {
		//$(this.slides[x]) && new Effect.Appear(this.slides[x], { duration: this.duration });
		//$(this.slides[y]) && new Effect.Fade(this.slides[y], { duration: this.duration });

		var active;

		for (var i = 0; i < this.slides.length; i++) {
			if ($(this.slides[i]).hasClassName('slide-active')) {
				active = this.slides[i];
			} else {
				$(this.slides[i]).down('img').hide();
				$(this.slides[i]).hide();
			}
		}

		var next;

		if ($(active).next()) {
			next = $(active).next();
		} else {
			next = $('image-div-a');
		}

		$(active).removeClassName('slide-active');
		$(next).addClassName('slide-active');

		$(next).down('img').show();

		new Effect.Appear(next, { duration: this.duration });
		new Effect.Fade(active, { duration: this.duration });
	},

	// the onload event handler that starts the fading.
	startSlideShow: function () {
		setInterval(this.play.bind(this), this.wait);
		//this.play = setInterval(this.play.bind(this),this.wait);
		//$(this.playButton).hide();
		//$(this.pauseButton).appear({ duration: 0});

		//this.updatecounter();

	},

	play: function () {

		/*var imageShow, imageHide;

		imageShow = this.iImageId+1;
		imageHide = this.iImageId;

		if (imageShow == this.numOfImages) {
			this.swapImage(0,imageHide);
			this.iImageId = 0;
		} else {
			this.swapImage(imageShow,imageHide);
			this.iImageId++;
		}*/

		this.swapImage(0,0);

		//this.textIn = this.iImageId+1 + ' of ' + this.numOfImages;
		//this.updatecounter();
	}/*,

	stop: function  () {
		clearInterval(this.play);
		//$(this.playButton).appear({ duration: 0});
		//$(this.pauseButton).hide();
	},

	goNext: function () {
		clearInterval(this.play);
		//$(this.playButton).appear({ duration: 0});
		//$(this.pauseButton).hide();

		var imageShow, imageHide;

		imageShow = this.iImageId+1;
		imageHide = this.iImageId;

		if (imageShow == this.numOfImages) {
			this.swapImage(0,imageHide);
			this.iImageId = 0;
		} else {
			this.swapImage(imageShow,imageHide);
			this.iImageId++;
		}

		//this.updatecounter();
	},

	goPrevious: function () {
		clearInterval(this.play);
		//$(this.playButton).appear({ duration: 0});
		//$(this.pauseButton).hide();

		var imageShow, imageHide;

		imageShow = this.iImageId-1;
		imageHide = this.iImageId;

		if (this.iImageId == 0) {
			this.swapImage(this.numOfImages-1,imageHide);
			this.iImageId = this.numOfImages-1;

			//alert(NumOfImages-1 + ' and ' + imageHide + ' i=' + i)

		} else {
			this.swapImage(imageShow,imageHide);
			this.iImageId--;

			//alert(imageShow + ' and ' + imageHide)
		}

		//this.updatecounter();
	},

	updatecounter: function () {
		var textIn = this.iImageId+1 + ' of ' + this.numOfImages;
		$(this.counter) && ( $(this.counter).innerHTML = textIn );
		if ( $(this.caption) && ( oNewCaption = $(this.slides[this.iImageId]).down('.image-caption') ) ) {
			$(this.caption).innerHTML = oNewCaption.innerHTML;
		}
	}*/
}