/**
 * UpSolution Element: Gallery
 */
;( function( $, undefined ) {
	"use strict";

	$us.WGallery = function( container, options ) {
		this.init( container, options );
	};

	$us.WGallery.prototype = {
		init: function( container, options ) {
			var self = this;

			self.$container = $( container );
			self.$list = $( '.w-gallery-list', container );
			self.$itemsImg = $( '.w-gallery-item-img', container );
			self.$loadmore = $( '.w-gallery-loadmore', container );
			self.$jsonContainer = $( '.w-gallery-json', container );
			self.currentPage = 1;
			self.ajaxData = {};
			self.allImageIds = [];

			/**
			 * @var {{}} Bondable events
			 */
			self._events = {
				showNumberOfHiddenImages: $ush.debounce( self.showNumberOfHiddenImages.bind( self ), 5 ),
				getItems: self._getItems.bind( self ),
			};

			if ( self.$jsonContainer.length && ! $us.usbPreview() ) {
				self.ajaxData = self.$jsonContainer[ 0 ].onclick() || {};
				self.allImageIds = self.ajaxData.template_vars.ids || [];
			}

			if ( self.$container.hasClass( 'type_masonry' ) ) {
				self.initMasonry();
			}

			if ( self.$container.hasClass( 'action_popup_image' ) ) {
				self.initMagnificPopup();
			}

			// Show number of hidden images
			$us.$window.on( 'resize', self._events.showNumberOfHiddenImages );
			self.showNumberOfHiddenImages();

			if ( ! self.allImageIds.length ) {
				return;
			}

			$( 'button', self.$loadmore ).on( 'click', self._events.getItems );

			if ( self.ajaxData.template_vars.pagination == 'load_on_scroll' ) {
				$us.waypoints.add( self.$loadmore, /* offset */'-70%', self._events.getItems );
			}
		},

		initMagnificPopup: function() {
			$( 'a.w-gallery-item-link', this.$container ).magnificPopup( {
				type: 'image',
				gallery: {
					enabled: true,
					navigateByImgClick: true,
					preload: [0, 1],
					tPrev: $us.langOptions.magnificPopup.tPrev, // Alt text on left arrow
					tNext: $us.langOptions.magnificPopup.tNext, // Alt text on right arrow
					tCounter: $us.langOptions.magnificPopup.tCounter // Markup for "1 of 7" counter
				},
				removalDelay: 300,
				mainClass: 'mfp-fade',
				fixedContentPos: true
			} );
		},

		initMasonry: function() {
			var self = this,
				isotopeOptions = {
					itemSelector: '.w-gallery-item:not(.hidden)',
					layoutMode: 'masonry',
					isOriginLeft: ! $ush.isRtl(),
				};

			if ( self.$list.parents( '.w-tabs-section-content-h' ).length ) {
				isotopeOptions.transitionDuration = 0;
			}

			$( '>*:not(.hidden)', self.$list ).imagesLoaded( function() {
				self.$list.isotope( isotopeOptions );
				self.$list.isotope();
			} );
			$us.$canvas.on( 'contentChange', function() {
				$( '>*:not(.hidden)', self.$list ).imagesLoaded( function() {
					self.$list.isotope();
				} );
			} );
		},

		/**
		 * Show number of hidden images.
		 */
		showNumberOfHiddenImages: function() {
			var self = this,
				hiddenImagesNumber = self.$itemsImg.filter( ':hidden' ).length;

			self.$itemsImg.removeAttr( 'data-hidden-images-number' );

			if ( hiddenImagesNumber ) {
				self.$itemsImg
					.filter( ':visible:last' )
					.attr( 'data-hidden-images-number', hiddenImagesNumber );
			}
		},

		/**
		 * Get and add the items.
		 */
		_getItems: function() {
			var self = this;

			if ( self.$loadmore.hasClass( 'done' ) ) {
				return;
			}

			self.currentPage += 1;

			// Get next part ids
			self.ajaxData.template_vars.ids = self.allImageIds.slice(
				self.ajaxData.template_vars.quantity * ( self.currentPage - 1 ), /* start */
				self.ajaxData.template_vars.quantity * self.currentPage /* end */
			);

			// Stop ajax actions, if all ids loaded
			if ( ! self.ajaxData.template_vars.ids.length ) {
				self.$loadmore.addClass( 'done' );

				return;
			}

			self.$loadmore.addClass( 'loading' );

			$.ajax( {
				type: 'post',
				url: $us.ajaxUrl,
				data: {
					action: self.ajaxData.action,
					template_vars: JSON.stringify( self.ajaxData.template_vars ),
				},
				success: function( html ) {
					var $result = $( html ),
						$items = $( '.w-gallery-list > *', $result );

					if ( ! $items.length || self.currentPage === self.ajaxData.template_vars.max_num_pages ) {
						self.$loadmore
							.addClass( 'done' );
					}

					self.$list.append( $items );

					if ( self.$container.hasClass( 'action_popup_image' ) ) {
						self.initMagnificPopup();
					}

					if ( self.$container.hasClass( 'type_masonry' ) ) {
						var isotope = self.$list.data( 'isotope' );
						if ( isotope ) {
							isotope.insert( $items );
							isotope.reloadItems();
						}
					}

					if ( self.ajaxData.template_vars.pagination == 'load_on_scroll' ) {
						$us.waypoints.add( self.$loadmore, /* offset */'-70%', self._events.getItems );
					}

					self.$loadmore.removeClass( 'loading' );
				},
				error: function() {
					self.$loadmore.removeClass( 'loading' );
				}
			} );
		},
	};

	$.fn.wGallery = function( options ) {
		return this.each( function() {
			$( this ).data( 'WGallery', new $us.WGallery( this, options ) );
		} );
	};

	$( function() {
		$( '.w-gallery' ).wGallery();
	} );

} )( jQuery );
