var SlideDropDown = Fx.Elements.extend({

	options: {
		onActive: Class.empty,
		onBackground: Class.empty,
		display: 1,
		show: true,
		height: true,
		width: false,
		opacity: true,
		fixedHeight: false,
		fixedWidth: false,
		wait: false,
		alwaysHide: false,
		cookie: true
	},

	initialize: function(){
		var options, togglers, atogglers, elements, container;
		$each(arguments, function(argument, i){
			switch($type(argument)){
				case 'object': options = argument; break;
				case 'element': container = $(argument); break;
				default:
					var temp = $$(argument);
					if (!togglers) togglers = temp;
					else if (!atogglers) atogglers = temp;
					else elements = temp;
			}
		});
		this.togglers = togglers || [];
		this.atogglers = atogglers || [];
		this.elements = elements || [];
		this.container = $(container);
		this.setOptions(options);
		this.previous = -1;
		if (this.options.alwaysHide) this.options.wait = true;
		if ($chk(this.options.show)){
			this.options.display = false;
			this.previous = this.options.show;
		}
		if (this.options.start){
			this.options.display = false;
			this.options.show = false;
		}
		this.effects = {};
		if (this.options.opacity) this.effects.opacity = 'fullOpacity';
		if (this.options.width) this.effects.width = this.options.fixedWidth ? 'fullWidth' : 'offsetWidth';
		if (this.options.height) this.effects.height = this.options.fixedHeight ? 'fullHeight' : 'scrollHeight';
		for (var i = 0, l = this.togglers.length; i < l; i++) { this.addSection(this.togglers[i], this.elements[i]); }
		this.elements.each(function(el, i){
			el._parent = el.parentNode;
			var _toggler = $(this.togglers[i]);
			
			if (this.options.cookie)
			{
				for(i = 0; i < this.options.cookie.length; i = i + 2)
				{
				if (_toggler.id)
					{
						if (this.options.cookie[i] == _toggler.id)
						{
							if (this.options.cookie[i+1] == "1")
							{
								if (_toggler.className.indexOf("close") == -1)
								{
									_toggler.className += " close";
								}
							}
						}
					}
				}
			}
			if (_toggler.className.indexOf("close") != -1)
			{
				for (var fx in this.effects) el.setStyle(fx, 0);
			}
		}, this);
		this.parent(this.elements);
		if ($chk(this.options.display)) this.display(this.options.display);
	},

	addSection: function(toggler, element, pos){
		toggler = $(toggler);
		element = $(element);
		var test = this.togglers.contains(toggler);
		var len = this.togglers.length;
		this.togglers.include(toggler);
		this.elements.include(element);
		if (len && (!test || pos)){
			pos = $pick(pos, len - 1);
			toggler.injectBefore(this.togglers[pos]);
			element.injectAfter(toggler);
		} else if (this.container && !test){
			toggler.inject(this.container);
			element.inject(this.container);
		}
		var idx = this.togglers.indexOf(toggler);
		toggler.addEvent('click', this.display.bind(this, idx));
		
		this.atogglers[idx].addEvent('click', this.display.bind(this, idx));
		this.atogglers[idx].href = "javascript:;";
		
		if (this.options.height) element.setStyles({'padding-top': 0, 'border-top': 'none', 'padding-bottom': 0, 'border-bottom': 'none'});
		if (this.options.width) element.setStyles({'padding-left': 0, 'border-left': 'none', 'padding-right': 0, 'border-right': 'none'});
		element.fullOpacity = 1;
		if (this.options.fixedWidth) element.fullWidth = this.options.fixedWidth;
		if (this.options.fixedHeight) element.fullHeight = this.options.fixedHeight;
		element.setStyle('overflow', 'hidden');
		if (!test){
			for (var fx in this.effects) {element.setStyle(fx, 0);};
		}

		return this;
	},

	display: function(index){
		index = ($type(index) == 'element') ? this.elements.indexOf(index) : index;
		if ((this.timer && this.options.wait) || (index === this.previous && !this.options.alwaysHide)) return this;
		this.previous = index;
		var obj = {};

		this.elements.each(function(el, i){
			if(i == index || this.options.in_header)
			{
				obj[i] = {};
				var hide = (i != index) || (this.options.alwaysHide && (el.offsetHeight > 0));
				this.fireEvent(hide ? 'onBackground' : 'onActive', [this.togglers[i], el]);
			for (var fx in this.effects) {obj[i][fx] = hide ? 0 : el[this.effects[fx]];}
				}
			}, this);
			this
		return this.start(obj);
	},
	serialize: function(){
		return this.togglers.map(function(toggler){
			var trigger = 0;
			if (toggler.className.indexOf("close") != -1)
			{
				trigger = 1;
			}
			if (toggler.id)
			{
				return toggler.id+","+trigger;
			}
			else
			{
			return "null,"+trigger;
			}
		}, this);
	},
	showThisHideOpen: function(index){return this.display(index);}
});