"use strict";
+function($, window){

	var gallery = {};

	gallery.init = function() {
		var $grid = $('.masonry-grid').imagesLoaded( function() {
			$grid.masonry({
				itemSelector: '.masonry-brick',
				percentPosition: true
			}); 
		});
	
		var initPhotoSwipeFromDOM = function(gallerySelector) {
	
			// parse slide data (url, title, size ...) from DOM elements 
			// (children of gallerySelector)
			var parseThumbnailElements = function(el) {
				var thumbElements = el.childNodes,
					numNodes = thumbElements.length,
					items = [],
					figureEl,
					linkEl,
					size,
					item;
	
				for(var i = 0; i < numNodes; i++) {
	
					figureEl = thumbElements[i]; // <figure> element
	
					// include only element nodes 
					if(figureEl.nodeType !== 1) {
						continue;
					}
	
					linkEl = figureEl.children[0]; // <a> element
	
					size = linkEl.getAttribute('data-size').split('x');
	
					// create slide object
					item = {
						src: linkEl.getAttribute('href'),
						w: parseInt(size[0], 10),
						h: parseInt(size[1], 10)
					};
	
	
	
					if(figureEl.children.length > 1) {
						// <figcaption> content
						item.title = figureEl.children[1].innerHTML; 
					}
	
					if(linkEl.children.length > 0) {
						// <img> thumbnail element, retrieving thumbnail url
						item.msrc = linkEl.children[0].getAttribute('src');
					} 
	
					item.el = figureEl; // save link to element for getThumbBoundsFn
					items.push(item);
				}
	
				return items;
			};
	
			// find nearest parent element
			var closest = function closest(el, fn) {
				return el && ( fn(el) ? el : closest(el.parentNode, fn) );
			};
	
			// triggers when user clicks on thumbnail
			var onThumbnailsClick = function(e) {
				e = e || window.event;
				e.preventDefault ? e.preventDefault() : e.returnValue = false;
	
				var eTarget = e.target || e.srcElement;
	
				// find root element of slide
				var clickedListItem = closest(eTarget, function(el) {
					return (el.tagName && el.tagName.toUpperCase() === 'FIGURE');
				});
	
				if(!clickedListItem) {
					return;
				}
	
				// find index of clicked item by looping through all child nodes
				// alternatively, you may define index via data- attribute
				var clickedGallery = clickedListItem.parentNode,
					childNodes = clickedListItem.parentNode.childNodes,
					numChildNodes = childNodes.length,
					nodeIndex = 0,
					index;
	
				for (var i = 0; i < numChildNodes; i++) {
					if(childNodes[i].nodeType !== 1) { 
						continue; 
					}
	
					if(childNodes[i] === clickedListItem) {
						index = nodeIndex;
						break;
					}
					nodeIndex++;
				}
	
	
	
				if(index >= 0) {
					// open PhotoSwipe if valid index found
					openPhotoSwipe( index, clickedGallery );
				}
				return false;
			};
	
			// parse picture index and gallery index from URL (#&pid=1&gid=2)
			var photoswipeParseHash = function() {
				var hash = window.location.hash.substring(1),
				params = {};
	
				if(hash.length < 5) {
					return params;
				}
	
				var vars = hash.split('&');
				for (var i = 0; i < vars.length; i++) {
					if(!vars[i]) {
						continue;
					}
					var pair = vars[i].split('=');  
					if(pair.length < 2) {
						continue;
					}           
					params[pair[0]] = pair[1];
				}
	
				if(params.gid) {
					params.gid = parseInt(params.gid, 10);
				}
	
				return params;
			};
	
			var openPhotoSwipe = function(index, galleryElement, disableAnimation, fromURL) {
				var pswpElement = document.querySelectorAll('.pswp')[0],
					gallery,
					options,
					items;
	
				items = parseThumbnailElements(galleryElement);
	
				// define options (if needed)
				options = {
	
					// define gallery index (for URL)
					galleryUID: galleryElement.getAttribute('data-pswp-uid'),
	
					getThumbBoundsFn: function(index) {
						// See Options -> getThumbBoundsFn section of documentation for more info
						var thumbnail = items[index].el.getElementsByTagName('img')[0], // find thumbnail
							pageYScroll = window.pageYOffset || document.documentElement.scrollTop,
							rect = thumbnail.getBoundingClientRect(); 
	
						return {x:rect.left, y:rect.top + pageYScroll, w:rect.width};
					}
	
				};
	
				// PhotoSwipe opened from URL
				if(fromURL) {
					if(options.galleryPIDs) {
						// parse real index when custom PIDs are used 
						// http://photoswipe.com/documentation/faq.html#custom-pid-in-url
						for(var j = 0; j < items.length; j++) {
							if(items[j].pid == index) {
								options.index = j;
								break;
							}
						}
					} else {
						// in URL indexes start from 1
						options.index = parseInt(index, 10) - 1;
					}
				} else {
					options.index = parseInt(index, 10);
				}
	
				// exit if index not found
				if( isNaN(options.index) ) {
					return;
				}
	
				if(disableAnimation) {
					options.showAnimationDuration = 0;
				}
	
				// Pass data to PhotoSwipe and initialize it
				gallery = new PhotoSwipe( pswpElement, PhotoSwipeUI_Default, items, options);
				gallery.init();
			};
	
			// loop through all gallery elements and bind events
			var galleryElements = document.querySelectorAll( gallerySelector );
	
			for(var i = 0, l = galleryElements.length; i < l; i++) {
				galleryElements[i].setAttribute('data-pswp-uid', i+1);
				galleryElements[i].onclick = onThumbnailsClick;
			}
	
			// Parse URL and open gallery if it contains #&pid=3&gid=1
			var hashData = photoswipeParseHash();
			if(hashData.pid && hashData.gid) {
				openPhotoSwipe( hashData.pid ,  galleryElements[ hashData.gid - 1 ], true, true );
			}
		};

		// execute above function
		initPhotoSwipeFromDOM('.masonry-grid');
	};	
	window.gallery = gallery;

}(jQuery, window);

// initialize app
+function($) {
	gallery.init();		
}(jQuery);