//console.log();
(function(jQuery) {
jQuery.fn.lavaLamp = function(o) {
	o = jQuery.extend({
				target: 'li', 
				fx: 'swing',
				speed: 500, 
				click: function(){return true}, 
				startItem: '',
				autoReturn: true,
				returnDelay: 0,
				setOnClick: true,
				homeTop:0,
				homeLeft:0,
				homeWidth:0,
				homeHeight:0,
				returnHome:false,
				autoResize:false
				}, 
			o || {});

	// parseInt for easy mathing
	function getInt(arg) {
		var myint = parseInt(arg);
		return (isNaN(myint)? 0: myint);
	}

	if (o.autoResize)
		jQuery(window).resize(function(){
			jQuery(o.target+'.selectedLava').trigger('mouseenter');
		});

	return this.each(function() {
		// ensures parent UL or OL element has some positioning
		if (jQuery(this).css('position')=='static')
			jQuery(this).css('position','relative');

		// create homeLava element if origin dimensions set
		if (o.homeTop || o.homeLeft) { 
			var $home = jQuery('<'+o.target+' class="homeLava"></'+o.target+'>').css({ left:o.homeLeft, top:o.homeTop, width:o.homeWidth, height:o.homeHeight, position:'absolute' });
			jQuery(this).prepend($home);
		}

		var path = location.pathname + location.search + location.hash, $selected, $back, $lt = jQuery(o.target+'[class!=noLava]', this), delayTimer, bx=0, by=0;

		// start $selected default with CSS class 'selectedLava'
		$selected = jQuery(o.target+'.selectedLava', this);
		
		// override $selected if startItem is set
		if (o.startItem != '')
			$selected = $lt.eq(o.startItem);

		// default to $home element
		if ((o.homeTop || o.homeLeft) && $selected.length<1)
			$selected = $home;

		// loop through all the target element a href tags and
		// the longest href to match the location path is deemed the most 
		// accurate and selected as default
		if ($selected.length<1) {
			var pathmatch_len=0, $pathel;
	
			$lt.each(function(){ 
				var thishref = $('a:first',this).attr('href');
				//console.log(thishref+' size:'+thishref.length);
				if (path.indexOf(thishref)>-1 && thishref.length > pathmatch_len )
				{
					$pathel = $(this);
					pathmatch_len = thishref.length;
				}
	
			});
			if (pathmatch_len>0) {
				//console.log('found match:'+$('a:first',$pathel).attr('href'));
				$selected = $pathel;
			}
			//else 
				//console.log('no match!');
		}
	
		// if still no matches, default to the first element
		if ( $selected.length<1 )
			$selected = $lt.eq(0);

		// make sure we only have one element as $selected and apply selectedLava class
		$selected = jQuery($selected.eq(0).addClass('selectedLava'));
			
		// add mouseover event for every sub element
		$lt.bind('mouseenter', function() {
			//console.log('mouseenter');
			// help backLava behave if returnDelay is set
			if(delayTimer) {clearTimeout(delayTimer);delayTimer=null;}
			move(jQuery(this));
		}).click(function(e) {
			if (o.setOnClick) {
				$selected.removeClass('selectedLava');
				$selected = jQuery(this).addClass('selectedLava');
			}
			return o.click.apply(this, [e, this]);
		});
		
		// creates and adds to the container a backLava element with absolute positioning
		$back = jQuery('<li class="backLava"><div class="leftLava"></div><div class="bottomLava"></div><div class="cornerLava"></div></li>').css('position','absolute').prependTo(this);

		// setting css height and width actually sets the innerHeight and innerWidth, so
		// compute border and padding differences on styled backLava element to fit them in also.
		bx = getInt($back.css('borderLeftWidth'))+getInt($back.css('borderRightWidth'))+getInt($back.css('paddingLeft'))+getInt($back.css('paddingRight'));
		by = getInt($back.css('borderTopWidth'))+getInt($back.css('borderBottomWidth'))+getInt($back.css('paddingTop'))+getInt($back.css('paddingBottom'));

		// set the starting position for the lavalamp hover element: .back
		if (o.homeTop || o.homeLeft)
			$back.css({ left:o.homeLeft, top:o.homeTop, width:o.homeWidth, height:o.homeHeight });
		else
		{
			$back.css({ left: $selected.position().left, top: $selected.position().top, width: $selected.outerWidth()-bx, height: $selected.outerHeight()-by }); 
		}

		// after we leave the container element, move back to default/last clicked element
		jQuery(this).bind('mouseleave', function() {
			//console.log('mouseleave');
			var $returnEl = null;
			if (o.returnHome)
				$returnEl = $home;
			else if (!o.autoReturn)
				return true;
		
			if (o.returnDelay) {
				if(delayTimer) clearTimeout(delayTimer);
				delayTimer = setTimeout(function(){move($returnEl);},o.returnDelay);
			}
			else {
				move($returnEl);
			}
			return true;
		});

		function move($el) {
			if (!$el) $el = $selected;

			$back.stop()
			.animate({
				left: $el.position().left,
				top: $el.position().top,
				width: $el.outerWidth()-bx,
				height: $el.outerHeight()-by
			}, o.speed, o.fx);
		};
	});
	
};
})(jQuery);