/**

 * MooFlow - Image gallery

 *

 * Dependencies: MooTools 1.2

 *

 * @version			0.2.1

 *

 * @license			MIT-style license

 * @author			Tobias Wetzel <info [at] outcut.de>

 * @copyright		Author

 * @docmentation	http://outcut.de/MooFlow/Docmentation.html

 */ 



var MooFlow = new Class({



	Implements: [Events, Options],

	

	options: {

		onStart: $empty,

		onClickView: $empty,

		onAutoPlay: $empty,

		onAutoStop: $empty,

		onRequest: $empty,

		onResized: $empty,

		onEmptyinit: $empty,

		reflection: 0.4,

		heightRatio: 0.6,

		offsetY: 0,

		startIndex: 0,

		interval: 3000,

		factor: 115,

		bgColor: '#F1F1F1',

		useCaption: false,

		useResize: false,

		useSlider: false,

		useWindowResize: false,

		useMouseWheel: true,

		useKeyInput: false,

		useViewer: false

	},

	

	initialize: function(element, options){

		this.MooFlow = element;

		this.setOptions(options);

		this.foc = 150;

		this.factor = this.options.factor;

		this.offY = this.options.offsetY;

		this.isFull = false;

		this.isAutoPlay = false;

		this.isLoading = false;

		this.inMotion = false;

		

		this.MooFlow.addClass('mf').setStyles({

			'overflow':'hidden',

			'background-color':this.options.bgColor,

			'position':'relative',

			'height':this.MooFlow.getSize().x*this.options.heightRatio,

			'opacity':0

		});

		

		if(this.options.useWindowResize) window.addEvent('resize', this.update.bind(this, 'init'));

		if(this.options.useMouseWheel || this.options.useSlider) this.MooFlow.addEvent('mousewheel', this.wheelTo.bind(this));

		if(this.options.useKeyInput) document.addEvent('keydown', this.keyTo.bind(this));

		

		this.getElements(this.MooFlow);

	},

	

	clearInit: function(){

		this.fireEvent('emptyinit');

	},

	

	getElements: function(el){

		this.master = {'images':[]};

		var els = el.getChildren();

		if(!els.length) {this.clearInit(); return;}

		$$(els).each(function(el){

			var hash = $H(el.getElement('img').getProperties('src','title','alt','longdesc'));

			if(el.get('tag') == 'a') hash.combine(el.getProperties('href','rel','target'));

			this.master['images'].push(hash.getClean());

			el.dispose();

		}, this);

		this.clearMain();

	},

	

	clearMain: function(){

		if(this.cap){this.cap.fade(0);}

		if(this.nav){

			new Fx.Tween(this.nav, {

				'onComplete': function(){

					this.MooFlow.empty();

					this.createAniObj();

				}.bind(this)

			}).start('bottom', -50);

		}

		if(!this.nav && !this.cap){

			this.MooFlow.empty();

			this.createAniObj();

		}

	},

	

	getMooFlowElements: function(key){

		var els = [];

		this.master.images.each(function(el){ 

			els.push(el[key]); 

		});

		return els;

	},

	

	createAniObj: function(){

		this.aniFx = new Fx.Value({

			'transition': Fx.Transitions.Expo.easeOut,

			'link': 'cancel',

			'duration': 750,

			onMotion: this.process.bind(this),

			'onStart': this.flowStart.bind(this),

			'onComplete': this.flowComplete.bind(this)

		});

		this.addLoader();

	},

	

	addLoader: function(){

		this.MooFlow.store('height', this.MooFlow.getSize().y);

		this.loader = new Element('div',{'class':'loader'}).inject(this.MooFlow);

		new Fx.Tween(this.MooFlow, {

			'duration': 800,

			'onComplete': this.preloadImg.bind(this)

		}).start('opacity', 1);

	},

	

	preloadImg: function(){

		this.loadedImages = new Asset.images(this.getMooFlowElements('src'), {

			'onComplete': this.loaded.bind(this),

			'onProgress': this.createMooFlowElement.bind(this)

		});

	},

	

	createMooFlowElement: function(counter, i){

		var obj = this.getCurrent(i);

		var img = this.loadedImages[i];

		obj['width'] = img.width;

		obj['height'] = img.height;

		img.removeProperties('width','height');



		obj['div'] = new Element('div').setStyles({

			'position':'absolute',

			'display':'none',

			'height': this.MooFlow.getSize().y

		}).inject(this.MooFlow);

		obj['con'] = new Element('div').inject(obj['div']);

		img.setStyles({'vertical-align':'bottom', 'width':'100%', 'height':'50%'});

		img.addEvents({'click': this.clickTo.bind(this, i), 'dblclick': this.viewCallBack.bind(this, i)});

		img.inject(obj['con']);

		

		new Element('div').reflect({ 'img': img,

			'ref': this.options.reflection,

			'height': obj.height,

			'width': obj.width,

			'color': this.options.bgColor

		}).setStyles({'width':'100%','height':'50%','background-color': this.options.bgColor}).inject(obj['con']);

		

		this.loader.set('text', (counter+1) + ' / ' + this.loadedImages.length);

	},

	

	loaded: function(){

		this.index = this.options.startIndex;

		this.iL = this.master.images.length-1;

		new Fx.Tween(this.loader, {

			'duration': 800,

			'onComplete': this.createUI.bind(this)

		}).start('opacity', 0);

	},

	

	createUI: function(){

		this.loader.dispose();

		if(this.options.useCaption){

			this.cap = new Element('div').addClass('caption').set('opacity',0).inject(this.MooFlow);

		}	

		this.nav = new Element('div').addClass('mfNav').setStyle('bottom','-50px');

		this.autoPlayCon = new Element('div').addClass('autoPlayCon');

		this.sliderCon = new Element('div').addClass('sliderCon');

		this.resizeCon = new Element('div').addClass('resizeCon');		

		if(this.options.useAutoPlay){

			this.autoPlayCon.adopt(

				new Element('a',{'class':'stop','events': {'click':this.stop.bind(this)}}), 

				new Element('a',{'class':'play','events': {'click':this.play.bind(this)}})

			);

		}

		if(this.options.useSlider){

			this.sliPrev = new Element('a',{'class':'sliderNext','events': {'click':this.prev.bind(this)}});

			this.sliNext = new Element('a',{'class':'sliderPrev','events': {'click':this.next.bind(this)}});

			this.knob = new Element('div',{'class':'knob'});

			this.knob.adopt(new Element('div',{'class':'knobleft'}));

			this.slider = new Element('div',{'class':'slider'}).adopt(this.knob);

			this.sliderCon.adopt(this.sliPrev,this.slider,this.sliNext);

			this.slider.store('parentWidth', this.sliderCon.getSize().x-this.sliPrev.getSize().x-this.sliNext.getSize().x);

		}

		if(this.options.useResize){

			this.resizeCon.adopt(new Element('a',{'class':'resize','events': {'click':this.setScreen.bind(this)}}));

		}		

		this.MooFlow.adopt(this.nav.adopt(this.autoPlayCon, this.sliderCon, this.resizeCon));	

		this.showUI();

	},

	

	showUI: function(){

		if(this.cap) this.cap.fade(1);

		this.nav.tween('bottom', 20);

		this.fireEvent('start');

		this.update();

	},

	

	update: function(e){

		if(e == 'init') return;

		this.oW = this.MooFlow.getSize().x;

		this.sz = this.oW * 0.5;

		if(this.options.useSlider){	

			this.slider.setStyle('width',this.slider.getParent().getSize().x-this.sliPrev.getSize().x-this.sliNext.getSize().x-1);

			this.knob.setStyle('width',(this.slider.getSize().x/this.iL));

			this.sli = new SliderEx(this.slider, this.knob, {steps: this.iL}).set(this.index);

			this.sli.addEvent('onChange', this.glideTo.bind(this));

		}

		this.glideTo(this.index);

		this.isLoading = false;

	},

	

	setScreen: function(){

		if(this.isFull = !this.isFull){

			this.holder = new Element('div').inject(this.MooFlow,'after');

			this.MooFlow.wraps(new Element('div').inject(document.body));

			this.MooFlow.setStyles({'position':'absolute','z-index':'100','top':'0','left':'0','width':window.getSize().x,'height':window.getSize().y});

			if(this.options.useWindowResize){

				this._initResize = this.initResize.bind(this);

				window.addEvent('resize', this._initResize);

			}

		} else {

			this.MooFlow.wraps(this.holder);

			window.removeEvent('resize', this._initResize);

			delete this.holder, this._initResize;

			this.MooFlow.setStyles({'position':'relative','z-index':'','top':'','left':'','width':'','height':this.MooFlow.retrieve('height')});

			this.slider.setStyle('width',this.slider.retrieve('parentWidth'));

		}

		this.fireEvent('resized', this.isFull);

		this.update();

	},

	

	initResize: function(){

		this.MooFlow.setStyles({'width':window.getSize().x,'height':window.getSize().y});

		this.update();

	},

	

	getCurrent: function(index){

		return this.master.images[$chk(index) ? index : this.index];

	},

	

	loadJSON: function(url){

		if(!url || this.isLoading) return;

		this.isLoading = true;

		new Request.JSON({

			'onComplete': function(data){

				if($chk(data)){

					this.master = data;

					this.clearMain();

					this.fireEvent('request', data);

				}

			}.bind(this)

		}, this).get(url);

	},

	

	loadHTML: function(url, filter){

		if(!url || !filter || this.isLoading) return;

		this.isLoading = true;

		new Request.HTML({

			'onSuccess': function(tree, els, htm){

				var result = new Element('div', {'html': htm}).getChildren(filter);

				this.getElements(result);

				this.fireEvent('request', result);

			}.bind(this)

		}, this).get(url);

	},

	

	flowStart: function(){

		this.inMotion = true;

	},

	

	flowComplete: function(){

		this.inMotion = false;

	},

	

	viewCallBack: function(index){

		if(this.index != index || this.inMotion) return;

		var el = $H(this.getCurrent());

		var returnObj = {};

		returnObj['coords'] = el.div.getElement('img').getCoordinates();

		el.each(function(v, k){

			if($type(v) == 'number' || $type(v) == 'string') returnObj[k] = v;

		}, this);

		this.fireEvent('clickView', returnObj);

	},

	prev: function(){

		if(this.index > 0) this.clickTo(this.index-1);

	},

	next: function(){

		if(this.index < this.iL) this.clickTo(this.index+1);

	},

	stop: function(){

		$clear(this.autoPlay);

		this.isAutoPlay = false;

		this.fireEvent('autoStop');

	},

	play: function(){

		this.autoPlay = this.auto.periodical(this.options.interval, this);

		this.isAutoPlay = true;

		this.fireEvent('autoPlay');

	},

	auto: function(){

		if(this.index < this.iL) this.next();

		else if(this.index == this.iL) this.clickTo(0);

	},

	keyTo: function(e){

		switch (e.code){

			case 37: e.stop(); this.prev();	break;

			case 39: e.stop(); this.next();

		}

	},

	wheelTo: function(e){

		if(e.wheel > 0) this.prev();

		if(e.wheel < 0) this.next();

		e.stop().preventDefault();

	},

	clickTo: function(index){

		if(this.index == index) return;

		//this.aniFx.cancel();

		if(this.sli) this.sli.set(index);

		this.glideTo(index);

	},

	glideTo: function(index){

		this.index = index;

		this.aniFx.start(this.aniFx.get(), index*-this.foc);

		if(this.cap) this.cap.set('html', this.getCurrent().title);

	},

	process: function(x){

		var z,W,H,zI=this.iL,foc=this.foc,f=this.factor,sz=this.sz,oW=this.oW,offY=this.offY,div,elh,elw;

		this.master.images.each(function(el){

			div = el.div.style;

			elw = el.width;

			elh = el.height;

			if(x>-foc*6 && x<foc*6){

				with (Math) {

					z = sqrt(10000 + x * x) + 100;

					H = round((elh / elw * f) / z * sz);

					W = round(elw * H / elh);

					if(H >= elw * 0.5) {W = round(f / z * sz);}

					div.left = round(((x / z * sz) + sz) - (f * 0.5) / z * sz) + 'px';

					div.top = round(oW * 0.3 - H) + offY + 'px';

				}	

				el.con.style.height = H*2 + 'px';		

				div.width = W + 'px';

				div.zIndex = x < 0 ? zI++ : zI--;

				div.display = 'block';

			} else {

				div.display = 'none';

			}

			x += foc;

		});

	}

});



var SliderEx = new Class({

	Extends: Slider,

	set: function(step){

		this.step = Math.round(step);

		this.fireEvent('tick', this.toPosition(this.step));

		return this;

    },

	clickedElement: function(event){

		var dir = this.range < 0 ? -1 : 1;

		var position = event.page[this.axis] - this.element.getPosition()[this.axis] - this.half;

		position = position.limit(-this.options.offset, this.full -this.options.offset);

		this.step = Math.round(this.min + dir * this.toStep(position));

		this.checkStep();

		this.fireEvent('tick', position);

	}

});



Fx.Value = new Class({

	Extends: Fx,

	compute: function(from, to, delta){

		this.value = Fx.compute(from, to, delta);

		this.fireEvent('motion', this.value);

		return this.value;

	},

	get: function(){

		return this.value || 0;

	}

});



Element.implement({

	reflect: function(arg){

		i = arg.img.clone();

		if(Browser.Engine.trident){

			i.style.filter = 'flipv progid:DXImageTransform.Microsoft.Alpha(opacity=20, style=1, finishOpacity=0, startx=0, starty=0, finishx=0, finishy='+100*arg.ref+')';

			i.setStyles({'width':'100%', 'height':'100%'});

			return new Element('div').adopt(i);

		} else {

			var can = new Element('canvas').setProperties({'width':arg.width, 'height':arg.height});

			if(can.getContext){

				var ctx = can.getContext("2d");

				ctx.save();

				ctx.translate(0,arg.height-1);

				ctx.scale(1,-1);

				ctx.drawImage(i, 0, 0, arg.width, arg.height);

				ctx.restore();

				ctx.globalCompositeOperation = "destination-out";

				ctx.fillStyle = arg.color;

				ctx.fillRect(0, arg.height*0.5, arg.width, arg.height);

				var gra = ctx.createLinearGradient(0, 0, 0, arg.height*arg.ref);					

				gra.addColorStop(1, "rgba(255, 255, 255, 1.0)");

				gra.addColorStop(0, "rgba(255, 255, 255, "+(1-arg.ref)+")");

				ctx.fillStyle = gra;

				ctx.rect(0, 0, arg.width, arg.height);

				ctx.fill();

				delete ctx, gra;

			}

			return can;

		}

	}

});



window.addEvent('domready', function(){

	$$('.MooFlowieze').each(function(mooflow){

		new MooFlow(mooflow);

	});

});