/*
 * dc mega menu - jquery mega menu
 * copyright (c) 2011 design chemical
 *
 * dual licensed under the mit and gpl licenses:
 * 	http://www.opensource.org/licenses/mit-license.php
 * 	http://www.gnu.org/licenses/gpl.html
 *
 */
(function($){

	//define the defaults for the plugin and how to call it	
	$.fn.dcmegamenu = function(options){
		//set default options  
		var defaults = {
			classparent: 'dc-mega',
			rowitems: 3,
			speed: 'fast',
			effect: 'fade'
		};

		//call in the default otions
		var options = $.extend(defaults, options);
		var $dcmegamenuobj = this;

		//act upon the element that is passed into the design    
		return $dcmegamenuobj.each(function(options){

			megasetup();
			
			function megaover(){
				var subnav = $('.sub',this);
				$(this).addclass('mega-hover');
				if(defaults.effect == 'fade'){
					$(subnav).fadein(defaults.speed);
				}
				if(defaults.effect == 'slide'){
					$(subnav).slidedown(defaults.speed);
				}
			}
			
			function megaout(){
				var subnav = $('.sub',this);
				$(this).removeclass('mega-hover');
				$(subnav).hide();
			}

			function megasetup(){
				$arrow = '<span class="dc-mega-icon"></span>';
				var classparentli = defaults.classparent+'-li';
				var menuwidth = $($dcmegamenuobj).outerwidth(true);
				$('> li',$dcmegamenuobj).each(function(){
					//set width of sub
					var mainsub = $('> ul',this);
					var primarylink = $('> a',this);
					if($(mainsub).length > 0){
						$(primarylink).addclass(defaults.classparent).append($arrow);
						$(mainsub).addclass('sub').wrap('<div class="sub-container" />');
						
						// get position of parent item
							var position = $(this).position();
							parentleft = position.left;
							
						if($('ul',mainsub).length > 0){
							$(this).addclass(classparentli);
							$('.sub-container',this).addclass('mega');
							$('> li',mainsub).addclass('mega-hdr');
							$('.mega-hdr > a').addclass('mega-hdr-a');
							// create rows
							var hdrs = $('.mega-hdr',this);
							rowsize = parseint(defaults.rowitems);
							for(var i = 0; i < hdrs.length; i+=rowsize){
								hdrs.slice(i, i+rowsize).wrapall('<div class="row" />');
							}

							// get sub dimensions & set row height
							$(mainsub).show();

							// calc left position of sub menu
							// // get width of parent
							var parentwidth = $(this).width();
							
							// // calc width of sub menu
							var subwidth = $(mainsub).outerwidth(true);
							var totalwidth = $(mainsub).parent('.sub-container').outerwidth(true);
							var containerpad = totalwidth - subwidth;
							var itemwidth = $('.mega-hdr',mainsub).outerwidth(true);
							var rowitems = $('.row:eq(0) .mega-hdr',mainsub).length;
							var inneritemwidth = itemwidth * rowitems;
							var totalitemwidth = inneritemwidth + containerpad;
							
							// set mega header height
							$('.row',this).each(function(){
								$('.mega-hdr:last',this).addclass('last');
								var maxvalue = undefined;
								$('.mega-hdr-a',this).each(function(){
									var val = parseint($(this).height());
									if (maxvalue === undefined || maxvalue < val){
										maxvalue = val;
									}
								});
								$('.mega-hdr-a',this).css('height',maxvalue+'px');
								$(this).css('width',inneritemwidth+'px');
							});
							
							// // calc required left margin
							var marginleft = (totalitemwidth - parentwidth)/2;
							var subleft = parentleft - marginleft;

							// if left position is negative set to left margin
							if(subleft < 0){
								$('.sub-container',this).css('left','0');
							} else {
								$('.sub-container',this).css('left',parentleft+'px').css('margin-left',-marginleft+'px');
							}
							
							// calculate row height
							$('.row',mainsub).each(function(){
								var rowheight = $(this).height();
								$('.mega-hdr',this).css('height',rowheight+'px');
								$(this).parent('.row').css('height',rowheight+'px');
							});
							$(mainsub).hide();
					
						} else {
							$('.sub-container',this).addclass('non-mega').css('left',parentleft+'px');
						}
					}
				});
				// set position of mega dropdown to bottom of main menu
				var menuheight = $('> li > a',$dcmegamenuobj).outerheight(true);
				$('.sub-container',$dcmegamenuobj).css({top: menuheight+'px'}).css('z-index','1000');
				// hoverintent configuration
				var config = {
					sensitivity: 2, // number = sensitivity threshold (must be 1 or higher)
					interval: 100, // number = milliseconds for onmouseover polling interval
					over: megaover, // function = onmouseover callback (required)
					timeout: 400, // number = milliseconds delay before onmouseout
					out: megaout // function = onmouseout callback (required)
				};
				$('li',$dcmegamenuobj).hoverintent(config);
			}
		});
	};
})(jquery);