///////////////////////////////////////////
// Spin.js
//fgnass.github.com/spin.js#v1.2.7
!function(window, document, undefined) {

	/**
	 * Copyright (c) 2011 Felix Gnass [fgnass at neteye dot de]
	 * Licensed under the MIT license
	 */

	var prefixes = ['webkit', 'Moz', 'ms', 'O'] /* Vendor prefixes */
	, animations = {} /* Animation rules keyed by their name */
	, useCssAnimations

	/**
	 * Utility function to create elements. If no tag name is given,
	 * a DIV is created. Optionally properties can be passed.
	 */
	function createEl(tag, prop) {
	var el = document.createElement(tag || 'div')
		, n

	for(n in prop) el[n] = prop[n]
	return el
	}

	/**
	 * Appends children and returns the parent.
	 */
	function ins(parent /* child1, child2, ...*/) {
	for (var i=1, n=arguments.length; i<n; i++)
		parent.appendChild(arguments[i])

	return parent
	}
	
	/**
	 * Insert a new stylesheet to hold the @keyframe or VML rules.
	 */
	var sheet = function() {
	var el = createEl('style', {type : 'text/css'})
	ins(document.getElementsByTagName('head')[0], el)
	return el.sheet || el.styleSheet
	}()

	/**
	 * Creates an opacity keyframe animation rule and returns its name.
	 * Since most mobile Webkits have timing issues with animation-delay,
	 * we create separate rules for each line/segment.
	 */
	function addAnimation(alpha, trail, i, lines) {
	var name = ['opacity', trail, ~~(alpha*100), i, lines].join('-')
		, start = 0.01 + i/lines*100
		, z = Math.max(1 - (1-alpha) / trail * (100-start), alpha)
		, prefix = useCssAnimations.substring(0, useCssAnimations.indexOf('Animation')).toLowerCase()
		, pre = prefix && '-'+prefix+'-' || ''

	if (!animations[name]) {
		sheet.insertRule(
		'@' + pre + 'keyframes ' + name + '{' +
		'0%{opacity:' + z + '}' +
		start + '%{opacity:' + alpha + '}' +
		(start+0.01) + '%{opacity:1}' +
		(start+trail) % 100 + '%{opacity:' + alpha + '}' +
		'100%{opacity:' + z + '}' +
		'}', sheet.cssRules.length)

		animations[name] = 1
	}
	return name
	}

	/**
	 * Tries various vendor prefixes and returns the first supported property.
	 **/
	function vendor(el, prop) {
	var s = el.style
		, pp
		, i

	if(s[prop] !== undefined) return prop
	prop = prop.charAt(0).toUpperCase() + prop.slice(1)
	for(i=0; i<prefixes.length; i++) {
		pp = prefixes[i]+prop
		if(s[pp] !== undefined) return pp
	}
	}

	/**
	 * Sets multiple style properties at once.
	 */
	function css(el, prop) {
	for (var n in prop)
		el.style[vendor(el, n)||n] = prop[n]

	return el
	}

	/**
	 * Fills in default values.
	 */
	function merge(obj) {
	for (var i=1; i < arguments.length; i++) {
		var def = arguments[i]
		for (var n in def)
		if (obj[n] === undefined) obj[n] = def[n]
	}
	return obj
	}

	/**
	 * Returns the absolute page-offset of the given element.
	 */
	function pos(el) {
	var o = { x:el.offsetLeft, y:el.offsetTop }
	while((el = el.offsetParent))
		o.x+=el.offsetLeft, o.y+=el.offsetTop

	return o
	}

	var defaults = {
	lines: 12,			// The number of lines to draw
	length: 7,			// The length of each line
	width: 5,			 // The line thickness
	radius: 10,			 // The radius of the inner circle
	rotate: 0,			// Rotation offset
	corners: 1,			 // Roundness (0..1)
	color: '#000',		// #rgb or #rrggbb
	speed: 1,			 // Rounds per second
	trail: 100,			 // Afterglow percentage
	opacity: 1/4,		 // Opacity of the lines
	fps: 20,				// Frames per second when using setTimeout()
	zIndex: 2e9,			// Use a high z-index by default
	className: 'spinner', // CSS class to assign to the element
	top: 'auto',			// center vertically
	left: 'auto',		 // center horizontally
	position: 'relative'	// element position
	}

	/** The constructor */
	var _Spinner = function _Spinner(o) {
	if (!this.spin) return new _Spinner(o)
	this.opts = merge(o || {}, _Spinner.defaults, defaults)
	}

	_Spinner.defaults = {}

	merge(_Spinner.prototype, {
	spin: function(target) {
		this.stop()
		var self = this
		, o = self.opts
		, el = self.el = css(createEl(0, {className: o.className}), {position: o.position, width: 0, zIndex: o.zIndex})
		, mid = o.radius+o.length+o.width
		, ep // element position
		, tp // target position

		if (target) {
		target.insertBefore(el, target.firstChild||null)
		tp = pos(target)
		ep = pos(el)
		css(el, {
			left: (o.left == 'auto' ? tp.x-ep.x + (target.offsetWidth >> 1) : parseInt(o.left, 10) + mid) + 'px',
			top: (o.top == 'auto' ? tp.y-ep.y + (target.offsetHeight >> 1) : parseInt(o.top, 10) + mid)	+ 'px'
		})
		}

		el.setAttribute('aria-role', 'progressbar')
		self.lines(el, self.opts)

		if (!useCssAnimations) {
		// No CSS animation support, use setTimeout() instead
		var i = 0
			, fps = o.fps
			, f = fps/o.speed
			, ostep = (1-o.opacity) / (f*o.trail / 100)
			, astep = f/o.lines

		;(function anim() {
			i++;
			for (var s=o.lines; s; s--) {
			var alpha = Math.max(1-(i+s*astep)%f * ostep, o.opacity)
			self.opacity(el, o.lines-s, alpha, o)
			}
			self.timeout = self.el && setTimeout(anim, ~~(1000/fps))
		})()
		}
		return self
	},

	stop: function() {
		var el = this.el
		if (el) {
		clearTimeout(this.timeout)
		if (el.parentNode) el.parentNode.removeChild(el)
		this.el = undefined
		}
		return this
	},

	lines: function(el, o) {
		var i = 0
		, seg

		function fill(color, shadow) {
		return css(createEl(), {
			position: 'absolute',
			width: (o.length+o.width) + 'px',
			height: o.width + 'px',
			background: color,
			boxShadow: shadow,
			transformOrigin: 'left',
			transform: 'rotate(' + ~~(360/o.lines*i+o.rotate) + 'deg) translate(' + o.radius+'px' +',0)',
			borderRadius: (o.corners * o.width>>1) + 'px'
		})
		}

		for (; i < o.lines; i++) {
		seg = css(createEl(), {
			position: 'absolute',
			top: 1+~(o.width/2) + 'px',
			transform: o.hwaccel ? 'translate3d(0,0,0)' : '',
			opacity: o.opacity,
			animation: useCssAnimations && addAnimation(o.opacity, o.trail, i, o.lines) + ' ' + 1/o.speed + 's linear infinite'
		})

		if (o.shadow) ins(seg, css(fill('#000', '0 0 4px ' + '#000'), {top: 2+'px'}))

		ins(el, ins(seg, fill(o.color, '0 0 1px rgba(0,0,0,.1)')))
		}
		return el
	},

	opacity: function(el, i, val) {
		if (i < el.childNodes.length) el.childNodes[i].style.opacity = val
	}

	})

	/////////////////////////////////////////////////////////////////////////
	// VML rendering for IE
	/////////////////////////////////////////////////////////////////////////

	/**
	 * Check and init VML support
	 */
	;(function() {

	function vml(tag, attr) {
		return createEl('<' + tag + ' xmlns="urn:schemas-microsoft.com:vml" class="spin-vml">', attr)
	}

	var s = css(createEl('group'), {behavior: 'url(#default#VML)'})

	if (!vendor(s, 'transform') && s.adj) {

		// VML support detected. Insert CSS rule ...
		sheet.addRule('.spin-vml', 'behavior:url(#default#VML)')

		_Spinner.prototype.lines = function(el, o) {
		var r = o.length+o.width
			, s = 2*r

		function grp() {
			return css(
			vml('group', {
				coordsize: s + ' ' + s,
				coordorigin: -r + ' ' + -r
			}),
			{ width: s, height: s }
			)
		}

		var margin = -(o.width+o.length)*2 + 'px'
			, g = css(grp(), {position: 'absolute', top: margin, left: margin})
			, i

		function seg(i, dx, filter) {
			ins(g,
			ins(css(grp(), {rotation: 360 / o.lines * i + 'deg', left: ~~dx}),
				ins(css(vml('roundrect', {arcsize: o.corners}), {
					width: r,
					height: o.width,
					left: o.radius,
					top: -o.width>>1,
					filter: filter
				}),
				vml('fill', {color: o.color, opacity: o.opacity}),
				vml('stroke', {opacity: 0}) // transparent stroke to fix color bleeding upon opacity change
				)
			)
			)
		}

		if (o.shadow)
			for (i = 1; i <= o.lines; i++)
			seg(i, -2, 'progid:DXImageTransform.Microsoft.Blur(pixelradius=2,makeshadow=1,shadowopacity=.3)')

		for (i = 1; i <= o.lines; i++) seg(i)
		return ins(el, g)
		}

		_Spinner.prototype.opacity = function(el, i, val, o) {
		var c = el.firstChild
		o = o.shadow && o.lines || 0
		if (c && i+o < c.childNodes.length) {
			c = c.childNodes[i+o]; c = c && c.firstChild; c = c && c.firstChild
			if (c) c.opacity = val
		}
		}
	}
	else
		useCssAnimations = vendor(s, 'animation')
	})()

	if (typeof define == 'function' && define.amd)
	define(function() { return _Spinner })
	else
	window._Spinner = _Spinner
}(window, document);
////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////



////////////////////////////////////////////////
MD.Spinner = new Class({

	Implements: [Options,Events]

	,options: {
		name: ''
	,version: 'light'	 // [string] light, dark - shortcut for setting the style of the spinner and mask
	,size: 'normal'		 // [string] xlarge/huge, normal/large, medium, small, tiny
		,spinner: {
			lines: 12
			,length: 7
			,width: 2
			,radius: 7
			,trail: 50
			,color: '#fff'
			,speed: 2.0
			,shadow: false
		}
		,maskTarget: null
		,maskOpacity: 0.7
		,maskColor: '#000'
		,maskOptions: {}
		,message: ''
		,messageStyles: {
			'font-size':14
			,color: '#ccc'
			,'text-align': 'center'
		}
		,clickToHide: false
		,timeout: null
		// ,onShow: function(thisObj) {}
		// ,onHide: function(thisObj) {}
	}

	,initialize: function(targetElement, options){
		this.setOptions(options);
		// Deal with "version"
		if (this.options.version != '') {
			if (this.options.version.toLowerCase() == 'light') {
				this.options.spinner.color = '#000';
				this.options.spinner.shadow = false;
				this.options.maskColor = '#fff';
				this.options.messageStyles.color = '#000';
			} else if (this.options.version.toLowerCase() == 'dark') {
				this.options.spinner.color = '#fff';
				this.options.maskColor = '#000';
			}
		}

		if (this.options.size != '') {
			switch (this.options.size.toLowerCase()){
				case 'normal':
				case 'large':
					Object.merge(this.options.spinner, {lines:12,length:7,width:2,radius:7});
					break;
				case 'medium':
					Object.merge(this.options.spinner, {lines:11,length:5,width:2,radius:4,trail:30});
					break;
				case 'small':
				case 'tiny':
					Object.merge(this.options.spinner, {lines:10,length:3,width:2,radius:3,trail:50,shadow:false});
					break;
				case 'xlarge':
				case 'huge':
					Object.merge(this.options.spinner, {lines:12,length:12,width:4,radius:12});
					break;
			}
		}

		this.targetElement = targetElement;
		if (!this.options.maskTarget && !this.targetElement) {
			throw new Error('No target element supplied to MD.Spinner');
			return;
		}
		this.maskTarget 	= (this.options.maskTarget || this.targetElement);
		this.maskOpacity 	= this.options.maskOpacity;
		this.maskColor		= this.options.maskColor;
		this.maskOptions 	= this.options.maskOptions;
		this.clickToHide	= this.options.clickToHide;
		this.spinner 		= new _Spinner(this.options.spinner);

		this.active = false;
		return this;
	}

	,show: function(message) {
		if ( ! this.isActive()) {
			var targetDimensions = this.maskTarget.getCoordinates();
			this.mask = new Mask(this.maskTarget, Object.merge({
				destroyOnHide: true
				,height: targetDimensions.height
				,width: targetDimensions.width
				,style:{
					opacity: this.maskOpacity
					,'background-color': this.maskColor
					,'z-index': (function() {
									if (this.maskTarget.getStyle('z-index') == 'auto' || this.maskTarget.getStyle('z-index') == '') {
										return 100;
									} else {
										return this.maskTarget.getStyle('z-index').toInt()+100;
									}
								}.bind(this))()
				}
			}, this.maskOptions));
			this.mask.element.setProperty('name', this.options.name);

			this.message = new Element('div.Message', {html: (message || this.options.message)});
			this.message.setStyles(this.options.messageStyles);

			this.maskClone = undefined;
			this.mask.show();
			this.maskClone = this.mask.element.clone();
			this.maskClone.addClass('maskClone').setStyles({
				'background-color':'transparent'
				,opacity: 1
				,overflow:'hidden'
			}).inject(this.mask.element, 'after');
			this.message.inject(this.maskClone);
			this.positionMessage();
			this.spinner.spin((this.maskClone || this.targetElement));
			if (this.clickToHide) {
				this.maskClone.addEvent('click', function(){
					this.hide();
				}.bind(this));
			}
			this.fireEvent('show', this);
			this.active = true;
			if (this.options.timeout) (function(){ this.hide(); }.bind(this)).delay(this.options.timeout);
		}
		return this;
	}

	,hide: function() {
		if ($(this.maskClone)) this.maskClone.destroy();
		if ($(this.mask)) this.mask.hide();
		this.spinner.stop();
		this.fireEvent('hide', this);
		this.active = false;
		return this;
	}

	,hideSpinner: function() {
		this.spinner.stop();
		return this;
	}

	,hideMessage: function() {
		this.message.hide();
		return this;
	}

	,setMessage: function(text) {
		this.message.set('html', text);
		this.positionMessage();
		return this;
	}

	,positionMessage: function(options) {
		var posOptions = (options || {
			relativeTo: this.maskClone
			,position: 'center'
			,edge: 'center'
			,offset: {
				x: '',
				y: (this.options.spinner.radius + (this.options.spinner.length * 2) + 4)
			}
		});
		this.message.position(posOptions);
		return this;
	}

	,isActive: function() {
		return this.active;
	}
});


//////////////////////////////////////////////////////////////////////
// Implement this on any existing class to get spinner functionality
//////////////////////////////////////////////////////////////////////
MD.Spin = new Class({
	// Implements: [Events]
	showSpinner:function(options) {
		options = options || {};
		var element = this._getSpinnerElement();

		if (element) {
			if ( ! element._hasHadSpinner) {
				element._hasHadSpinner = true;
				element.setSpinnerOptions(Object.merge(this._getSpinnerOptions(), options));
			}

			element.showSpinner();
		}

		return this;
	}

	,hideSpinner: function(){
		var element = this._getSpinnerElement();

		if (element) {
			element.hideSpinner();
		}

		return this;
	}

	,_getSpinnerElement: function() {
		return this.toElement();
	}

	,_getSpinnerOptions: function() {
		// override this class if necessary/desired
		return (this.options.spinnerOptions ? this.options.spinnerOptions : {});
	}

	,getSpinner: function() {
		return this._getSpinnerElement().getSpinner();
	}
});
	

//////////////////////////////////////
// Any Element now has these methods!
//////////////////////////////////////
Element.implement({
	showSpinner:function() {
		var el = this;

		if (el.isVisible()) {
			if (el.spinnerTimeout) {
				clearTimeout(el.spinnerTimeout);
				clearInterval(el.spinnerInterval);
				delete el.spinnerInterval;
				delete el.spinnerTimeout;
			}
			el._spinner = el._spinner || new MD.Spinner(el, el._getSpinnerOptions());
			el._spinner.show();
		} else {
			if (!el.spinnerInterval) {
				el.spinnerInterval = setInterval(this.showSpinner.bind(this), 200);
				el.spinnerTimeout = setTimeout(function(){
					clearInterval(el.spinnerInterval);
					delete el.spinnerInterval;
				}, 5000);
			}
		}
		return el;
	}

	,setSpinnerOptions: function(options) {
		this._spinnerOptions = options;
	}

	,_getSpinnerOptions: function() {
		return (this._spinnerOptions ? this._spinnerOptions : {});
	}

	,hideSpinner: function(){
		var el = this;
		if (el.spinnerTimeout) {
			clearTimeout(el.spinnerTimeout);
			clearInterval(el.spinnerInterval);
			el.spinnerInterval = null;
			el.spinnerTimeout = null;
		}

		if (el._spinner && el._spinner.isActive()) {
			el._spinner.hide();
		}
		return this;
	}

	,getSpinner: function() {
		if (this._spinner) {
			return this._spinner;
		}

		return false;
	}
});