;
(function ($){
	/*
	 *  Implémentation de mediabox basée sur Lity
	 *  https://sorgalla.com/lity/
	 */

	var litySpip = {
		nameSpace: 'mediabox',
		config: {
			forceFocusInside: true,
		},
		strings: {
		},
		callbacks: {
			onOpen: [],
			onShow: [],
			onClose: []
		},
		focusedItem: [],
		isTransition: false,
		adjustHeight: function(instance) {
			var $content = instance.content();
			var $containerHeight = instance.element().find('.lity-container').height();
			if ($containerHeight) {
				var h = Math.round($containerHeight) + 'px';
				$content
					.css('max-height', h)
					.find('[data-'+litySpip.nameSpace+'-force-max-height]')
					.css('max-height', h);
			}
		},
		template: function(cfg, type, groupName, groupPosition, groupLength) {
			var className = '';
			if (!!cfg.className){
				className = ' ' + cfg.className;
			}
			if (cfg.transitionOnOpen) {
				className += ' lity-transition-on-open-'+cfg.transitionOnOpen;
			}
			if (!!cfg.noTransition) {
				className += ' lity-no-transition';
			}
			if (!!cfg.slideShow) {
				className += ' lity-slideshow';
			}

			var styles = [];
			var styles_container = '';
			var styles_content = '';
			// Offcanvas
			if (cfg.sideBar) {
				className += ' lity-sidebar lity-sidebar-' + cfg.sideBar;
				// Garde-fou : forcer hauteur et largeur
				if (cfg.sideBar === 'start' || cfg.sideBar === 'end') {
					className += ' lity-sidebar-inline';
					cfg.height = '100vh';
					cfg.maxHeight = '100vh';
				}
				if (cfg.sideBar === 'top' || cfg.sideBar === 'bottom') {
					className += ' lity-sidebar-block';
					cfg.width = '100vw';
					cfg.maxWidth = '100vw';
				}
			}
			if (cfg.maxWidth) {
				styles.push("max-width:" + cfg.maxWidth.replace("%","vw"));
			}
			if (cfg.maxHeight) {
				styles.push("max-height:" + cfg.maxHeight.replace("%","vh"));
			}
			if (cfg.width) {
				styles.push("width:" + cfg.width.replace("%","vw"));
				className += ' lity-width-set';
			}
			if (cfg.height) {
				styles.push("height:" + cfg.height.replace("%","vh"));
				className += ' lity-height-set';
				// si il y a un min-height il faut l'appliquer sur le container aussi du coup
				if (cfg.minHeight) {
					styles.push("min-height:" + cfg.minHeight.replace("%","vh"));
				}
			}
			if (styles.length) {
				styles_container = ' style="' + styles.join(';') + '"';
			}

			styles = [];
			if (cfg.minWidth) {
				styles.push("min-width:" + cfg.minWidth.replace("%","vw"));
			}
			if (cfg.minHeight && !cfg.height) {
				styles.push("min-height:" + cfg.minHeight.replace("%","vh"));
			}
			if (styles.length) {
				styles_content = ' style="' + styles.join(';') + '"';
			}

			var button_next_prev = '',
				  button_start_stop = '',
			    group_info_text = '',
			    group_info = '';
			if (groupName && groupLength) {
				if (groupLength > 1) {
					var newPosition = (groupPosition <= 0 ? groupLength - 1 : groupPosition - 1);
					button_next_prev += '<button class="lity-previous" type="button" data-group-name="'+groupName+'" data-group-position="'+newPosition+'" aria-label="' + litySpip.strings.previous + '" data-lity-previous'
						+'><b title="' + litySpip.strings.previous +'">❮</b></button>';
					newPosition = (groupPosition >= groupLength - 1 ? 0 : groupPosition + 1);
					button_next_prev += '<button class="lity-next" type="button" data-group-name="'+groupName+'" data-group-position="'+newPosition+'"  aria-label="' + litySpip.strings.next + '" data-lity-next'
						+'><b title="' + litySpip.strings.next +'">❯</b></button>';
				}
				group_info_text = " " + litySpip.strings.current;
				group_info_text = group_info_text.replace('{current}',(groupPosition+1)+'');
				group_info_text = group_info_text.replace('{total}',groupLength+'');

				button_start_stop += '<button class="lity-start-stop" type="button" data-lity-stop-start>'
					+'<b class="lity-start" aria-label="' + litySpip.strings.slideshowStart + '" title="' + litySpip.strings.slideshowStart +'">▶</b>'
					+'<b class="lity-stop" aria-label="' + litySpip.strings.slideshowStop + '" title="' + litySpip.strings.slideshowStop +'">□</b>'
				  +'</button>';

				group_info = '<div class="lity-group-caption">'
					+ '<span class="lity-group-start-stop">' + button_start_stop + '</span>'
					+ '<span class="lity-group-current">' + group_info_text + '</span>'
					+ '<span class="lity-group-next-prev">' + button_next_prev + '</span>'
					+ '<span class="lity-group-progress-bar"><span class="lity-group-progress-bar-status" style="width:0"></span></span>'
					+ '</div>';
			}
			var close_button_aria_label = litySpip.strings.close + ' (' + litySpip.strings.press_escape + ')' ;
			var dialog_title = (type === 'image' ? litySpip.strings.dialog_title_med : litySpip.strings.dialog_title_def);
			dialog_title += group_info_text + ' (' + litySpip.strings.press_escape + ')' ;

			var t =
				  '<dialog class="box_mediabox box_modalbox lity' + className + '" role="dialog" aria-label="' + dialog_title + '" tabindex="-1">'
				+   '<div class="lity-wrap"' + (cfg.overlayClose === false ? '' : ' data-lity-close') + ' role="document">'
				+     '<div class="lity-loader" aria-hidden="true" aria-label="' + litySpip.strings.loading + '"><span class="box-loading"></span></div>'
				+     '<div class="lity-container"' + styles_container + '>'
				+       '<button class="lity-close" type="button" aria-label="' + close_button_aria_label + '" data-lity-close><b data-lity-close title="' + litySpip.strings.close +'">&times;</b></button>'
				+       '<div class="lity-content"' + styles_content + '></div>'
				+       group_info
				+     '</div>'
				+   '</div>'
				+ '</dialog>';
			return t;
		},
		failHandler: function (target, instance) {
			return '<div class="error lity-error">Failed loading content</div>';
		},
		ajaxHandler: function (target, instance){
			// prise en charge de la syntaxe "url selector" comme jQuery.load()
			var selector,
				off = target.indexOf(" ");
			if (off> -1){
				selector = target.slice(off);
				selector = selector.match(/[^\x20\t\r\n\f]+/g) || [];
				selector = selector.join(" ");
				target = target.slice(0, off);
			}

			if (jQuery.spip.preloaded_urls[target]){
				//console.log("CACHE for "+target);
				var content = jQuery.spip.preloaded_urls[target];
				if (selector){
					// If a selector was specified, locate the right elements in a dummy div
					// Exclude scripts to avoid IE 'Permission Denied' errors
					content = $("<div>").append($.parseHTML(content)).find(selector);
				}
				return $('<div class="lity-content-inner"></div>').append(content);
			}

			var _deferred = $.Deferred;
			var deferred = _deferred();
			var failed = function (){
				deferred.reject($('<span class="error lity-error"></span>').append('Failed loading ajax'));
			};
			$.get(target)
				.done(function (content){
					jQuery.spip.preloaded_urls[target] = content;
					if (selector){
						// If a selector was specified, locate the right elements in a dummy div
						// Exclude scripts to avoid IE 'Permission Denied' errors
						content = $("<div>").append($.parseHTML(content)).find(selector);
					}
					deferred.resolve($('<div class="lity-content-inner"></div>').append(content));
				})
				.fail(failed);
			return deferred.promise();
		},
		imageBuildContent: function(img, desc, longdesc, defaultCaptionClass) {
			img.attr('alt', desc ? desc : '');
			desc = (longdesc ? longdesc : desc);
			if (desc){
				defaultCaptionClass = (defaultCaptionClass ? defaultCaptionClass : 'expanded');
				var id = 'lity-image-caption-' + Date.now().toString(36) + Math.random().toString(36).substr(2);
				img.attr('aria-describedby', id);
				img = $('<figure class="lity-image-figure"></figure>').append(img).append('<figcaption id="'+id+'" class="lity-image-caption '+defaultCaptionClass+'"><div class="lity-image-caption-text">'+desc+'</div></figcaption>');
			}
			else {
				img = $('<figure class="lity-image-figure"></figure>').append(img);
			}
			return img;
		},
		imageHandler: function (target, instance){
			var _deferred = $.Deferred;
			var desc = '';
			var longdesc = '';
			var defaultCaptionClass = (instance.options().defaultCaptionState === 'min' ? 'min' : 'expanded');
			var opener = instance.opener();
			if (opener){
				desc = opener.attr('title') || $('img[alt]', opener).eq(0).attr('alt') || '';
				var by = opener.attr('aria-describedby') || $('img[aria-describedby]', opener).eq(0).attr('aria-describedby') || '';
				if (by){
					longdesc = $('#'+by).html();
					longdesc = longdesc.trim();
				}
				if (!desc){
					desc = desc || instance.opener().attr('aria-label') || '';
				}
				desc = desc.trim();
			}

			var img;
			var cache = opener.data('lity-image-cache') || {};
			if (cache[target]) {
				//console.log("CACHE for "+target);
				img = cache[target];
				img = litySpip.imageBuildContent(img, desc, longdesc, defaultCaptionClass);
				return img;
			}

			img = $('<img src="'+target+'" class="lity-image-img" data-'+litySpip.nameSpace+'-force-max-height />');
			var deferred = _deferred();
			var failed = function (){
				deferred.reject($('<span class="error lity-error"></span>').append('Failed loading image'));
			};
			img
				.on('load', function (){
					if (this.naturalWidth===0){
						//console.log("image "+target+" naturalWidth=0");
						// forcons une largeur arbitraire pour rendre l'image visible...
						img.attr("style", "width:25vw;");
					}
					cache[target] = img;
					opener.data('lity-image-cache', cache);

					deferred.resolve(litySpip.imageBuildContent(img, desc, longdesc, defaultCaptionClass));
				})
				.on('error', failed)
			;

			return deferred.promise();
		},
		groupElements: function(groupName) {
			return $('.lity-enabled[data-'+litySpip.nameSpace+'-group'+'='+groupName+']');
		},
		eventSet:{},
		setEvents: function(what) {
			if (!litySpip.eventSet[what]) {
				switch (what) {
					case 'opener':
						$(document).on('click', '.lity-enabled', litySpip.onClickOpener);
						break;
					case 'listener':
						$(document).on('click', '.lity-previous,.lity-next', litySpip.onPrevNext);
						$(document).on('click', '.lity-start-stop', litySpip.onSlideShowToggle);
						$(window).on('keyup', litySpip.onKeyUp);
						$(document).on('click', '.lity-image-caption', litySpip.onCaptionToggle);
						break;
				}
				litySpip.eventSet[what] = true;
			}
		},
		onKeyUp: function(event) {
			var c = {37: "previous", 39: "next"}[event.keyCode];
			//console.log(['keyup', event.keyCode, c]);
			if (c) {
				var current = lity.current();
				if (current) {
					jQuery('.lity-' + c, current.element()).trigger('click');
				}
			}
		},
		onCaptionToggle: function(event) {
			var $caption = $(this);
			$caption.toggleClass('min expanded');
		},
		openerFromPrevNext($button) {
			var groupName = $button.data('group-name');
			var groupPosition = $button.data('group-position');
			return litySpip.groupElements(groupName).eq(groupPosition);
		},
		onPrevNext: function(event) {
			var $button = $(this);
			var newEl = litySpip.openerFromPrevNext($button);
			if (newEl) {
				var element = lity.current().element();
				litySpip.isTransition = {oldClosed:false, newOpened:true};
				element.addClass('lity-no-transition').css('visibility','hidden');
				litySpip.slideshowStop(element);
				var options = {transitionOnOpen: $button.is('.lity-next') ? 'slide-from-right' : 'slide-from-left'};
				if (element.is('.lity-slideshow')) {
					options.slideShow = true;
				}
				lity.current().close();
				litySpip.elementOpener(newEl, options);
			}
		},
		slideshowStart: function(element) {
			var $progress = element.find('.lity-group-progress-bar-status');
			$progress.attr('style','');
			$progress.css('width','100%');
			var delay = litySpip.config.slideshowSpeed;
			setTimeout(function(){
				$progress.css('transition','width ' + ((delay-200)/1000) + 's linear');
				$progress.css('width','0');
			},200);
			timer = setTimeout(function(){element.find('.lity-next').trigger('click')}, delay);
			element.data('lity-timer', timer);
			$('.lity-start', element).attr('aria-hidden', 'true');
			$('.lity-stop', element).attr('aria-hidden', 'false');
			jQuery('.lity-start-stop',element).focus();
		},
		slideshowStop: function(element) {
			timer = element.data('lity-timer');
			if (timer) {
				clearTimeout(timer);
			}
		},
		onSlideShowToggle: function(event) {
			var $button = $(this);
			var element = $button.closest('.lity');
			var slideShowState = (element.is('.lity-slideshow') ? true : false);
			var timer;

			if (!slideShowState) {
				litySpip.slideshowStart(element);
			}
			else {
				litySpip.slideshowStop(element);
				$('.lity-start', element).attr('aria-hidden', 'false');
				$('.lity-stop', element).attr('aria-hidden', 'true');
			}
			element.toggleClass('lity-slideshow');

		},
		onClickOpener: function(event) {
			event.preventDefault();

			var opener = $(this);
			litySpip.elementOpener(opener);
		},
		elementOpener: function(opener, options) {
			var cfg = opener.data('mediabox-options');
			if (options) {
				cfg = $.extend({}, cfg, options);
			}
			var target = opener.data('href-popin') || opener.data('href') || opener.attr('href') || opener.attr('src');

			litySpip.lityOpener(target, cfg, opener.get(0));
		},
		lityOpener: function(target, cfg, opener) {
			litySpip.setEvents('listener');
			if (!litySpip.isTransition) {
				// routage des callbacks
				litySpip.callbacks.onOpen.push(cfg.onOpen || false);
				litySpip.callbacks.onShow.push(cfg.onShow || false);
				litySpip.callbacks.onClose.push(cfg.onClose || false);

				// memoriser le focus
				litySpip.focusedItem.push($(document.activeElement));
			}

			var type = cfg.type || '';
			if (!type && opener) {
				type = $(opener).data(litySpip.nameSpace+'-type') || '';
			}

			var handlers = lity.handlers();
			// ajouter le handler ajax si besoin
			if (type==='ajax'){
				handlers.ajax = litySpip.ajaxHandler;
			}
			handlers.image = litySpip.imageHandler;
			// si on est inline, router sur le handler fail si la cible n'existe pas
			if (type==='inline'){
				var el = [];
				try {
					el = $(target);
				} catch (e) {
					el = [];
				}
				if (!el.length){
					handlers.inline = litySpip.failHandler;
				}
			}
			cfg = $.extend({handlers: handlers}, cfg);
			if (type && ['image', 'inline', 'ajax', 'iframe'].indexOf(type)!== -1){
				cfg.handler = type;
			}

			if (opener && typeof($.parseMediaboxOptions) !== "undefined") {
				cfg = $.extend(cfg, $.parseMediaboxOptions(litySpip.nameSpace, opener));
			}

			if (!!cfg.preloadOnly) {
				litySpip.lityPreLoader(target, cfg, opener);
			}
			else {
				// est-ce une galerie ?
				var groupPosition = 0;
				var groupLength = 0;
				if (opener) {
					var groupName = cfg.rel || (opener ? $(opener).data(litySpip.nameSpace+'-group') : '');
					if (groupName) {
						var elements = litySpip.groupElements(groupName);
						groupPosition = elements.index($(opener));
						groupLength = elements.length;
					}
					//console.log({type:type, groupName: groupName, groupPosition: groupPosition, groupLength: groupLength});
				}

				cfg = $.extend({template: litySpip.template(cfg, type, groupName, groupPosition, groupLength)}, cfg);
				//console.log("Call lity "+cfg.handler+' '+target);
				lity(target, cfg, opener);
			}

		},
		lityPreLoader: function (target, cfg, opener) {
			//console.log("lityPreLoader " + target);
			if (cfg.handler && cfg.handlers[cfg.handler]) {
				if (cfg.handler === 'image' || cfg.handler === 'ajax') {
					var instance = {
						opener: function() { return $(opener);},
						options: function() { return cfg}
					};
					var content = cfg.handlers[cfg.handler](target, instance);
				}
			}
		}
	}

	jQuery.fn.extend({

		mediabox: function (options){
			var cfg = $.extend({}, litySpip.config, options);


			if (this===jQuery.fn){
				var href = cfg.href || ""; // content
				litySpip.lityOpener(href, cfg, null);
				return this;
			} else {

				if (cfg.rel) {
					this.attr('data-'+litySpip.nameSpace+'-group', cfg.rel);
				}
				else {
					this.each(function() {
						var rel = $(this).attr('rel');
						if (rel) {
							$(this).attr('data-'+litySpip.nameSpace+'-group', rel);
						}
					});
				}

				litySpip.setEvents('opener');

				this
					.data('mediabox-options', cfg)
					.addClass('lity-enabled');

				(cfg.preload ? this : this.filter('[data-'+litySpip.nameSpace+'-preload]')).each(function() {
					litySpip.elementOpener($(this),{preloadOnly: true});
				});

				return this;
			}
		},

		mediaboxClose: function (){
			var $current = lity.current();
			if ($current){
				$current.close();
				return true;
			}
			return false;
		}

	});

	var initConfig = function (){

		// recuperer les préférences de l'utilisateur
		var b = typeof (mediabox_settings)=='object' ? mediabox_settings : {};
		litySpip.nameSpace = b.ns ? b.ns : 'mediabox';

		litySpip.strings.slideshowStart = b.str_ssStart;
		litySpip.strings.slideshowStop = b.str_ssStop;
		litySpip.strings.current = b.str_cur;
		litySpip.strings.previous = b.str_prev;
		litySpip.strings.next = b.str_next;
		litySpip.strings.close = b.str_close;
		litySpip.strings.loading = b.str_loading;
		litySpip.strings.press_escape = b.str_petc;
		litySpip.strings.dialog_title_def = b.str_dialTitDef;
		litySpip.strings.dialog_title_med = b.str_dialTitMed;
		litySpip.config.slideshowSpeed = (b.lity.slideshow_speed ? b.lity.slideshow_speed : 5000);
		litySpip.config.defaultCaptionState = (b.lity.defaultCaptionState ? b.lity.defaultCaptionState : 'expanded');

		var styles = {
			'container': '',
			'content': '',
		};
		if (b.lity.minWidth) {
			styles.content += "min-width:"+b.lity.minWidth.replace('%','vw')+';';
		}
		if (b.lity.maxWidth) {
			styles.container += "max-width:"+b.lity.maxWidth.replace('%','vw')+';';
		}
		if (b.lity.minHeight) {
			styles.content += "min-height:"+b.lity.minHeight.replace('%','vh')+';';
		}
		if (b.lity.maxHeight) {
			styles.container += "max-height:"+b.lity.maxHeight.replace('%','vh')+';';
		}
		var insert = '';
		for (let key in styles) {
			if (styles[key]) {
				insert += '.box_mediabox .lity-' + key + '{' + styles[key] + '}';
			}
		}
		if (b.lity.opacite) {
			insert += '.box_mediabox:before{opacity:'+b.lity.opacite+'}';
		}
		if (insert) {
			$('head').append($('<style type="text/css">'+insert+'</style>'));
		}


		$(document).on('lity:open', function(event, instance) {
			if (!instance.element().is('.lity-slideshow')){
				jQuery('.lity-close', instance.element()).focus();
			}
			if (!litySpip.isTransition){
				//console.log('Lity opened');
				//instance.element.is('.lity-no-transition-on-open').removeClass('lity-no-transition-on-open');
				// placer le focus sur le bouton close
				var callback = litySpip.callbacks.onOpen.pop();
				if (callback){
					callback(event, instance);
				}
			}
		});
		$(document).on('lity:ready', function(event, instance) {
			litySpip.adjustHeight(instance);
			if (jQuery.spip) {
				jQuery.spip.triggerAjaxLoad(instance.element().get(0))
			}
			if (instance.element().addClass('lity-ready').is('.lity-slideshow')) {
				litySpip.slideshowStart(instance.element());
			}
			if (!litySpip.isTransition){
				//console.log('Lity ready');
				var callback = litySpip.callbacks.onShow.pop();
				if (callback){
					callback(event, instance);
				}
			}
			else {
				litySpip.isTransition.newOpened = true;
				if (litySpip.isTransition.oldClosed) {
					litySpip.isTransition = false; // transition terminee
				}
				// trigger un resize, c'est un minimum
				instance.content().trigger('lity:resize', [instance]);
			}
			// preloader le next si on est dans une galerie
			var $next = instance.element().find('.lity-next');
			if ($next.length) {
				$next = litySpip.openerFromPrevNext($next);
				if ($next) {
					litySpip.elementOpener($next, {preloadOnly: true});
				}
			}
		});
		$(document).on('lity:close', function(event, instance) {
			if (!litySpip.isTransition){
				//console.log('Lity close');
				// depiler si la box a ete fermee avant d'etre ready
				if (litySpip.callbacks.onShow.length > litySpip.callbacks.onOpen.length) {
					litySpip.callbacks.onShow.pop();
				}
				var callback = litySpip.callbacks.onClose.pop();
				if (callback) {
					callback(event, instance);
				}
			}
		});
		$(document).on('lity:remove', function(event, instance) {
			if (!litySpip.isTransition){
				//console.log('Lity remove');
				var focused = litySpip.focusedItem.pop();
				if (focused){
					try {
						focused.focus();
					} catch (e) {
						// Ignore exceptions, eg. for SVG elements which can't be
						// focused in IE11
					}
				}
			}
			else {
				litySpip.isTransition.oldClosed = true;
				if (litySpip.isTransition.newOpened) {
					litySpip.isTransition = false; // transition terminee
				}
			}
		});
		$(document).on('lity:resize', function(event, instance) {
			//console.log('Lity resize');
			litySpip.adjustHeight(instance);
		});

	}
	// on écrase la config juste une fois
	initConfig();

})(jQuery);
