Aris.Menu = Function.extend({

	constructor: function(rootEl, config) {
		this.root = Aris.DOM.get(rootEl);
		this._items = [];
		this.config = {
			active: 'active',
			selected: 'sel',
			menu: 'menu',
			closeDelay: 100,
			openDelay: 100
		};
		$merge( this.config, config);
		Aris.Menu.all.push(this);
	},

	_getActivator: function(n) {
		while(n.previousSibling) {
			n=n.previousSibling;
			if ( n.nodeName=="A" ) return n;
		} return null;
	},
	
	addMenu: function(el, parent) {
		if ( !el.parentNode ) this.root.appendChild( el );
		var p = el.parentNode;
		Aris.DOM.addClass(p,'parent');
		var a = this._getActivator(el);
		Aris.DOM.addClass(a,'trigger');
		var mi = { menu:el, parent:p, activator:a, timer:null }
		this._items.push(mi);
		return mi;
	},
	
	closeAll: function() {
		this._items.forEach( this.closeMenu, this);
	},
	
	onactivate: function (mi) {
		if (mi.timer) { mi.timer = this.clearTimer( mi.timer ); }
		mi.timer = setTimeout( function() { this.openMenu(mi) }.bind(this), this.config.openDelay );
	},
	
	ondeactivate: function(mi) {
		if (mi.timer) { mi.timer = this.clearTimer( mi.timer ); }
		mi.timer = setTimeout( function() { this.closeMenu(mi) }.bind(this), this.config.closeDelay );
	},
	
	openMenu: function (mi) {
		Aris.DOM.addClass( mi.parent, this.config.active );
		Aris.DOM.addClass( mi.menu, this.config.menu );
		Aris.DOM.addClass( mi.activator, this.config.selected );
		if (!mi.menu.style.width ) Aris.DOM.setStyle( mi.menu, 'width', mi.menu.offsetWidth +'px');
	},
	
	closeMenu: function (mi) {
		Aris.DOM.removeClass(mi.parent,this.config.active);
		Aris.DOM.removeClass(mi.menu,this.config.menu);
		Aris.DOM.removeClass(mi.activator,this.config.selected);
		mi.timer = this.clearTimer(mi.timer);
	},
	
	clearTimer: function(t) {						
		clearTimeout(t);
		return t = null;
	}
	

},{ //begin static interface
	all: []
});


Aris.Menu.DropDown = Aris.Menu.extend({
	constructor: function(el, config) {
		this.base(el,config);
		var uls = Aris.DOM.get(el).getElementsByTagName('UL');
		forEach(uls, this.addMenu, this);
	},

	addMenu: function(el, parent) {
		var mi = this.base(el, parent);
		var a = mi.activator.cloneNode(true);
		a.className = '';
		//if ( a.firstChild.appendData ) a.firstChild.appendData(' Main');
		var li = Aris.DOM.create('li',  { className: 'alt', children: [ a ] } );
		mi.menu.insertBefore(li,mi.menu.firstChild);
		Aris.Event.add(mi.parent,'mouseover', function(ev) { this.onactivate(mi); }, this);
		Aris.Event.add(mi.parent,'mouseout', function(ev) { this.ondeactivate(mi); }, this);
	}
	
}, {
	init: function() {
		Aris.Event.onDOMLoaded.add(function() {
			
			Aris.DOM.getElementsByClass('dropdown').forEach( function(ddmenu) {
				return new Aris.Menu.DropDown(ddmenu);
			});
		});
	}
});