/**
 * 
 * Magnific Popup Core JS file
 * 
 */


/**
 * Private static constants
 */
var CLOSE_EVENT = 'Close',
	BEFORE_CLOSE_EVENT = 'BeforeClose',
	AFTER_CLOSE_EVENT = 'AfterClose',
	BEFORE_APPEND_EVENT = 'BeforeAppend',
	MARKUP_PARSE_EVENT = 'MarkupParse',
	OPEN_EVENT = 'Open',
	CHANGE_EVENT = 'Change',
	NS = 'mfp',
	EVENT_NS = '.' + NS,
	READY_CLASS = 'mfp-ready',
	REMOVING_CLASS = 'mfp-removing',
	PREVENT_CLOSE_CLASS = 'mfp-prevent-close';


/**
 * Private vars 
 */
/*jshint -W079 */
var mfp, // As we have only one instance of MagnificPopup object, we define it locally to not to use 'this'
	MagnificPopup = function(){},
	_isJQ = !!(window.jQuery),
	_prevStatus,
	_window = $(window),
	_document,
	_prevContentType,
	_wrapClasses,
	_currPopupType;


/**
 * Private functions
 */
var _mfpOn = function(name, f) {
		mfp.ev.on(NS + name + EVENT_NS, f);
	},
	_getEl = function(className, appendTo, html, raw) {
		var el = document.createElement('div');
		el.className = 'mfp-'+className;
		if(html) {
			el.innerHTML = html;
		}
		if(!raw) {
			el = $(el);
			if(appendTo) {
				el.appendTo(appendTo);
			}
		} else if(appendTo) {
			appendTo.appendChild(el);
		}
		return el;
	},
	_mfpTrigger = function(e, data) {
		mfp.ev.triggerHandler(NS + e, data);

		if(mfp.st.callbacks) {
			// converts "mfpEventName" to "eventName" callback and triggers it if it's present
			e = e.charAt(0).toLowerCase() + e.slice(1);
			if(mfp.st.callbacks[e]) {
				mfp.st.callbacks[e].apply(mfp, $.isArray(data) ? data : [data]);
			}
		}
	},
	_getCloseBtn = function(type) {
		if(type !== _currPopupType || !mfp.currTemplate.closeBtn) {
			mfp.currTemplate.closeBtn = $( mfp.st.closeMarkup.replace('%title%', mfp.st.tClose ) );
			_currPopupType = type;
		}
		return mfp.currTemplate.closeBtn;
	},
	// Initialize Magnific Popup only when called at least once
	_checkInstance = function() {
		if(!$.magnificPopup.instance) {
			/*jshint -W020 */
			mfp = new MagnificPopup();
			mfp.init();
			$.magnificPopup.instance = mfp;
		}
	},
	// CSS transition detection, http://stackoverflow.com/questions/7264899/detect-css-transitions-using-javascript-and-without-modernizr
	supportsTransitions = function() {
		var s = document.createElement('p').style, // 's' for style. better to create an element if body yet to exist
			v = ['ms','O','Moz','Webkit']; // 'v' for vendor

		if( s['transition'] !== undefined ) {
			return true; 
		}
			
		while( v.length ) {
			if( v.pop() + 'Transition' in s ) {
				return true;
			}
		}
				
		return false;
	};



/**
 * Public functions
 */
MagnificPopup.prototype = {

	constructor: MagnificPopup,

	/**
	 * Initializes Magnific Popup plugin. 
	 * This function is triggered only once when $.fn.magnificPopup or $.magnificPopup is executed
	 */
	init: function() {
		var appVersion = navigator.appVersion;
		mfp.isLowIE = mfp.isIE8 = document.all && !document.addEventListener;
		mfp.isAndroid = (/android/gi).test(appVersion);
		mfp.isIOS = (/iphone|ipad|ipod/gi).test(appVersion);
		mfp.supportsTransition = supportsTransitions();

		// We disable fixed positioned lightbox on devices that don't handle it nicely.
		// If you know a better way of detecting this - let me know.
		mfp.probablyMobile = (mfp.isAndroid || mfp.isIOS || /(Opera Mini)|Kindle|webOS|BlackBerry|(Opera Mobi)|(Windows Phone)|IEMobile/i.test(navigator.userAgent) );
		_document = $(document);

		mfp.popupsCache = {};
	},

	/**
	 * Opens popup
	 * @param  data [description]
	 */
	open: function(data) {

		var i;

		if(data.isObj === false) { 
			// convert jQuery collection to array to avoid conflicts later
			mfp.items = data.items.toArray();

			mfp.index = 0;
			var items = data.items,
				item;
			for(i = 0; i < items.length; i++) {
				item = items[i];
				if(item.parsed) {
					item = item.el[0];
				}
				if(item === data.el[0]) {
					mfp.index = i;
					break;
				}
			}
		} else {
			mfp.items = $.isArray(data.items) ? data.items : [data.items];
			mfp.index = data.index || 0;
		}

		// if popup is already opened - we just update the content
		if(mfp.isOpen) {
			mfp.updateItemHTML();
			return;
		}
		
		mfp.types = []; 
		_wrapClasses = '';
		if(data.mainEl && data.mainEl.length) {
			mfp.ev = data.mainEl.eq(0);
		} else {
			mfp.ev = _document;
		}

		if(data.key) {
			if(!mfp.popupsCache[data.key]) {
				mfp.popupsCache[data.key] = {};
			}
			mfp.currTemplate = mfp.popupsCache[data.key];
		} else {
			mfp.currTemplate = {};
		}



		mfp.st = $.extend(true, {}, $.magnificPopup.defaults, data ); 
		mfp.fixedContentPos = mfp.st.fixedContentPos === 'auto' ? !mfp.probablyMobile : mfp.st.fixedContentPos;

		if(mfp.st.modal) {
			mfp.st.closeOnContentClick = false;
			mfp.st.closeOnBgClick = false;
			mfp.st.showCloseBtn = false;
			mfp.st.enableEscapeKey = false;
		}
		

		// Building markup
		// main containers are created only once
		if(!mfp.bgOverlay) {

			// Dark overlay
			mfp.bgOverlay = _getEl('bg').on('click'+EVENT_NS, function() {
				mfp.close();
			});

			mfp.wrap = _getEl('wrap').attr('tabindex', -1).on('click'+EVENT_NS, function(e) {
				if(mfp._checkIfClose(e.target)) {
					mfp.close();
				}
			});

			mfp.container = _getEl('container', mfp.wrap);
		}

		mfp.contentContainer = _getEl('content');
		if(mfp.st.preloader) {
			mfp.preloader = _getEl('preloader', mfp.container, mfp.st.tLoading);
		}


		// Initializing modules
		var modules = $.magnificPopup.modules;
		for(i = 0; i < modules.length; i++) {
			var n = modules[i];
			n = n.charAt(0).toUpperCase() + n.slice(1);
			mfp['init'+n].call(mfp);
		}
		_mfpTrigger('BeforeOpen');


		if(mfp.st.showCloseBtn) {
			// Close button
			if(!mfp.st.closeBtnInside) {
				mfp.wrap.append( _getCloseBtn() );
			} else {
				_mfpOn(MARKUP_PARSE_EVENT, function(e, template, values, item) {
					values.close_replaceWith = _getCloseBtn(item.type);
				});
				_wrapClasses += ' mfp-close-btn-in';
			}
		}

		if(mfp.st.alignTop) {
			_wrapClasses += ' mfp-align-top';
		}

	

		if(mfp.fixedContentPos) {
			mfp.wrap.css({
				overflow: mfp.st.overflowY,
				overflowX: 'hidden',
				overflowY: mfp.st.overflowY
			});
		} else {
			mfp.wrap.css({ 
				top: _window.scrollTop(),
				position: 'absolute'
			});
		}
		if( mfp.st.fixedBgPos === false || (mfp.st.fixedBgPos === 'auto' && !mfp.fixedContentPos) ) {
			mfp.bgOverlay.css({
				height: _document.height(),
				position: 'absolute'
			});
		}

		

		if(mfp.st.enableEscapeKey) {
			// Close on ESC key
			_document.on('keyup' + EVENT_NS, function(e) {
				if(e.keyCode === 27) {
					mfp.close();
				}
			});
		}

		_window.on('resize' + EVENT_NS, function() {
			mfp.updateSize();
		});


		if(!mfp.st.closeOnContentClick) {
			_wrapClasses += ' mfp-auto-cursor';
		}
		
		if(_wrapClasses)
			mfp.wrap.addClass(_wrapClasses);


		// this triggers recalculation of layout, so we get it once to not to trigger twice
		var windowHeight = mfp.wH = _window.height();

		
		var windowStyles = {};

		if( mfp.fixedContentPos ) {
            if(mfp._hasScrollBar(windowHeight)){
                var s = mfp._getScrollbarSize();
                if(s) {
                    windowStyles.marginRight = s;
                }
            }
        }

		if(mfp.fixedContentPos) {
			if(!mfp.isIE7) {
				windowStyles.overflow = 'hidden';
			} else {
				// ie7 double-scroll bug
				$('body, html').css('overflow', 'hidden');
			}
		}

		
		
		var classesToadd = mfp.st.mainClass;
		if(mfp.isIE7) {
			classesToadd += ' mfp-ie7';
		}
		if(classesToadd) {
			mfp._addClassToMFP( classesToadd );
		}

		// add content
		mfp.updateItemHTML();

		_mfpTrigger('BuildControls');

		// remove scrollbar, add margin e.t.c
		$('html').css(windowStyles);
		
		// add everything to DOM
		mfp.bgOverlay.add(mfp.wrap).prependTo( mfp.st.prependTo || $(document.body) );

		// Save last focused element
		mfp._lastFocusedEl = document.activeElement;
		
		// Wait for next cycle to allow CSS transition
		setTimeout(function() {
			
			if(mfp.content) {
				mfp._addClassToMFP(READY_CLASS);
				mfp._setFocus();
			} else {
				// if content is not defined (not loaded e.t.c) we add class only for BG
				mfp.bgOverlay.addClass(READY_CLASS);
			}
			
			// Trap the focus in popup
			_document.on('focusin' + EVENT_NS, mfp._onFocusIn);

		}, 16);

		mfp.isOpen = true;
		mfp.updateSize(windowHeight);
		_mfpTrigger(OPEN_EVENT);

		return data;
	},

	/**
	 * Closes the popup
	 */
	close: function() {
		if(!mfp.isOpen) return;
		_mfpTrigger(BEFORE_CLOSE_EVENT);

		mfp.isOpen = false;
		// for CSS3 animation
		if(mfp.st.removalDelay && !mfp.isLowIE && mfp.supportsTransition )  {
			mfp._addClassToMFP(REMOVING_CLASS);
			setTimeout(function() {
				mfp._close();
			}, mfp.st.removalDelay);
		} else {
			mfp._close();
		}
	},

	/**
	 * Helper for close() function
	 */
	_close: function() {
		_mfpTrigger(CLOSE_EVENT);

		var classesToRemove = REMOVING_CLASS + ' ' + READY_CLASS + ' ';

		mfp.bgOverlay.detach();
		mfp.wrap.detach();
		mfp.container.empty();

		if(mfp.st.mainClass) {
			classesToRemove += mfp.st.mainClass + ' ';
		}

		mfp._removeClassFromMFP(classesToRemove);

		if(mfp.fixedContentPos) {
			var windowStyles = {marginRight: ''};
			if(mfp.isIE7) {
				$('body, html').css('overflow', '');
			} else {
				windowStyles.overflow = '';
			}
			$('html').css(windowStyles);
		}
		
		_document.off('keyup' + EVENT_NS + ' focusin' + EVENT_NS);
		mfp.ev.off(EVENT_NS);

		// clean up DOM elements that aren't removed
		mfp.wrap.attr('class', 'mfp-wrap').removeAttr('style');
		mfp.bgOverlay.attr('class', 'mfp-bg');
		mfp.container.attr('class', 'mfp-container');

		// remove close button from target element
		if(mfp.st.showCloseBtn &&
		(!mfp.st.closeBtnInside || mfp.currTemplate[mfp.currItem.type] === true)) {
			if(mfp.currTemplate.closeBtn)
				mfp.currTemplate.closeBtn.detach();
		}


		if(mfp.st.autoFocusLast && mfp._lastFocusedEl) {
			$(mfp._lastFocusedEl).focus(); // put tab focus back
		}
		mfp.currItem = null;	
		mfp.content = null;
		mfp.currTemplate = null;
		mfp.prevHeight = 0;

		_mfpTrigger(AFTER_CLOSE_EVENT);
	},
	
	updateSize: function(winHeight) {

		if(mfp.isIOS) {
			// fixes iOS nav bars https://github.com/dimsemenov/Magnific-Popup/issues/2
			var zoomLevel = document.documentElement.clientWidth / window.innerWidth;
			var height = window.innerHeight * zoomLevel;
			mfp.wrap.css('height', height);
			mfp.wH = height;
		} else {
			mfp.wH = winHeight || _window.height();
		}
		// Fixes #84: popup incorrectly positioned with position:relative on body
		if(!mfp.fixedContentPos) {
			mfp.wrap.css('height', mfp.wH);
		}

		_mfpTrigger('Resize');

	},

	/**
	 * Set content of popup based on current index
	 */
	updateItemHTML: function() {
		var item = mfp.items[mfp.index];

		// Detach and perform modifications
		mfp.contentContainer.detach();

		if(mfp.content)
			mfp.content.detach();

		if(!item.parsed) {
			item = mfp.parseEl( mfp.index );
		}

		var type = item.type;

		_mfpTrigger('BeforeChange', [mfp.currItem ? mfp.currItem.type : '', type]);
		// BeforeChange event works like so:
		// _mfpOn('BeforeChange', function(e, prevType, newType) { });

		mfp.currItem = item;

		if(!mfp.currTemplate[type]) {
			var markup = mfp.st[type] ? mfp.st[type].markup : false;

			// allows to modify markup
			_mfpTrigger('FirstMarkupParse', markup);

			if(markup) {
				mfp.currTemplate[type] = $(markup);
			} else {
				// if there is no markup found we just define that template is parsed
				mfp.currTemplate[type] = true;
			}
		}

		if(_prevContentType && _prevContentType !== item.type) {
			mfp.container.removeClass('mfp-'+_prevContentType+'-holder');
		}

		var newContent = mfp['get' + type.charAt(0).toUpperCase() + type.slice(1)](item, mfp.currTemplate[type]);
		mfp.appendContent(newContent, type);

		item.preloaded = true;

		_mfpTrigger(CHANGE_EVENT, item);
		_prevContentType = item.type;

		// Append container back after its content changed
		mfp.container.prepend(mfp.contentContainer);

		_mfpTrigger('AfterChange');
	},


	/**
	 * Set HTML content of popup
	 */
	appendContent: function(newContent, type) {
		mfp.content = newContent;

		if(newContent) {
			if(mfp.st.showCloseBtn && mfp.st.closeBtnInside &&
				mfp.currTemplate[type] === true) {
				// if there is no markup, we just append close button element inside
				if(!mfp.content.find('.mfp-close').length) {
					mfp.content.append(_getCloseBtn());
				}
			} else {
				mfp.content = newContent;
			}
		} else {
			mfp.content = '';
		}

		_mfpTrigger(BEFORE_APPEND_EVENT);
		mfp.container.addClass('mfp-'+type+'-holder');

		mfp.contentContainer.append(mfp.content);
	},


	/**
	 * Creates Magnific Popup data object based on given data
	 * @param  {int} index Index of item to parse
	 */
	parseEl: function(index) {
		var item = mfp.items[index],
			type;

		if(item.tagName) {
			item = { el: $(item) };
		} else {
			type = item.type;
			item = { data: item, src: item.src };
		}

		if(item.el) {
			var types = mfp.types;

			// check for 'mfp-TYPE' class
			for(var i = 0; i < types.length; i++) {
				if( item.el.hasClass('mfp-'+types[i]) ) {
					type = types[i];
					break;
				}
			}

			item.src = item.el.attr('data-mfp-src');
			if(!item.src) {
				item.src = item.el.attr('href');
			}
		}

		item.type = type || mfp.st.type || 'inline';
		item.index = index;
		item.parsed = true;
		mfp.items[index] = item;
		_mfpTrigger('ElementParse', item);

		return mfp.items[index];
	},


	/**
	 * Initializes single popup or a group of popups
	 */
	addGroup: function(el, options) {
		var eHandler = function(e) {
			e.mfpEl = this;
			mfp._openClick(e, el, options);
		};

		if(!options) {
			options = {};
		}

		var eName = 'click.magnificPopup';
		options.mainEl = el;

		if(options.items) {
			options.isObj = true;
			el.off(eName).on(eName, eHandler);
		} else {
			options.isObj = false;
			if(options.delegate) {
				el.off(eName).on(eName, options.delegate , eHandler);
			} else {
				options.items = el;
				el.off(eName).on(eName, eHandler);
			}
		}
	},
	_openClick: function(e, el, options) {
		var midClick = options.midClick !== undefined ? options.midClick : $.magnificPopup.defaults.midClick;


		if(!midClick && ( e.which === 2 || e.ctrlKey || e.metaKey || e.altKey || e.shiftKey ) ) {
			return;
		}

		var disableOn = options.disableOn !== undefined ? options.disableOn : $.magnificPopup.defaults.disableOn;

		if(disableOn) {
			if($.isFunction(disableOn)) {
				if( !disableOn.call(mfp) ) {
					return true;
				}
			} else { // else it's number
				if( _window.width() < disableOn ) {
					return true;
				}
			}
		}

		if(e.type) {
			e.preventDefault();

			// This will prevent popup from closing if element is inside and popup is already opened
			if(mfp.isOpen) {
				e.stopPropagation();
			}
		}

		options.el = $(e.mfpEl);
		if(options.delegate) {
			options.items = el.find(options.delegate);
		}
		mfp.open(options);
	},


	/**
	 * Updates text on preloader
	 */
	updateStatus: function(status, text) {

		if(mfp.preloader) {
			if(_prevStatus !== status) {
				mfp.container.removeClass('mfp-s-'+_prevStatus);
			}

			if(!text && status === 'loading') {
				text = mfp.st.tLoading;
			}

			var data = {
				status: status,
				text: text
			};
			// allows to modify status
			_mfpTrigger('UpdateStatus', data);

			status = data.status;
			text = data.text;

			mfp.preloader.html(text);

			mfp.preloader.find('a').on('click', function(e) {
				e.stopImmediatePropagation();
			});

			mfp.container.addClass('mfp-s-'+status);
			_prevStatus = status;
		}
	},


	/*
		"Private" helpers that aren't private at all
	 */
	// Check to close popup or not
	// "target" is an element that was clicked
	_checkIfClose: function(target) {

		if($(target).closest('.' + PREVENT_CLOSE_CLASS).length) {
			return;
		}

		var closeOnContent = mfp.st.closeOnContentClick;
		var closeOnBg = mfp.st.closeOnBgClick;

		if(closeOnContent && closeOnBg) {
			return true;
		} else {

			// We close the popup if click is on close button or on preloader. Or if there is no content.
			if(!mfp.content || $(target).closest('.mfp-close').length || (mfp.preloader && target === mfp.preloader[0]) ) {
				return true;
			}

			// if click is outside the content
			if(  (target !== mfp.content[0] && !$.contains(mfp.content[0], target))  ) {
				if(closeOnBg) {
					// last check, if the clicked element is in DOM, (in case it's removed onclick)
					if( $.contains(document, target) ) {
						return true;
					}
				}
			} else if(closeOnContent) {
				return true;
			}

		}
		return false;
	},
	_addClassToMFP: function(cName) {
		mfp.bgOverlay.addClass(cName);
		mfp.wrap.addClass(cName);
	},
	_removeClassFromMFP: function(cName) {
		this.bgOverlay.removeClass(cName);
		mfp.wrap.removeClass(cName);
	},
	_hasScrollBar: function(winHeight) {
		return (  (mfp.isIE7 ? _document.height() : document.body.scrollHeight) > (winHeight || _window.height()) );
	},
	_setFocus: function() {
		(mfp.st.focus ? mfp.content.find(mfp.st.focus).eq(0) : mfp.wrap).focus();
	},
	_onFocusIn: function(e) {
		if( e.target !== mfp.wrap[0] && !$.contains(mfp.wrap[0], e.target) ) {
			mfp._setFocus();
			return false;
		}
	},
	_parseMarkup: function(template, values, item) {
		var arr;
		if(item.data) {
			values = $.extend(item.data, values);
		}
		_mfpTrigger(MARKUP_PARSE_EVENT, [template, values, item] );

		$.each(values, function(key, value) {
			if(value === undefined || value === false) {
				return true;
			}
			arr = key.split('_');
			if(arr.length > 1) {
				var el = template.find(EVENT_NS + '-'+arr[0]);

				if(el.length > 0) {
					var attr = arr[1];
					if(attr === 'replaceWith') {
						if(el[0] !== value[0]) {
							el.replaceWith(value);
						}
					} else if(attr === 'img') {
						if(el.is('img')) {
							el.attr('src', value);
						} else {
							el.replaceWith( $('<img>').attr('src', value).attr('class', el.attr('class')) );
						}
					} else {
						el.attr(arr[1], value);
					}
				}

			} else {
				template.find(EVENT_NS + '-'+key).html(value);
			}
		});
	},

	_getScrollbarSize: function() {
		// thx David
		if(mfp.scrollbarSize === undefined) {
			var scrollDiv = document.createElement("div");
			scrollDiv.style.cssText = 'width: 99px; height: 99px; overflow: scroll; position: absolute; top: -9999px;';
			document.body.appendChild(scrollDiv);
			mfp.scrollbarSize = scrollDiv.offsetWidth - scrollDiv.clientWidth;
			document.body.removeChild(scrollDiv);
		}
		return mfp.scrollbarSize;
	}

}; /* MagnificPopup core prototype end */




/**
 * Public static functions
 */
$.magnificPopup = {
	instance: null,
	proto: MagnificPopup.prototype,
	modules: [],

	open: function(options, index) {
		_checkInstance();

		if(!options) {
			options = {};
		} else {
			options = $.extend(true, {}, options);
		}

		options.isObj = true;
		options.index = index || 0;
		return this.instance.open(options);
	},

	close: function() {
		return $.magnificPopup.instance && $.magnificPopup.instance.close();
	},

	registerModule: function(name, module) {
		if(module.options) {
			$.magnificPopup.defaults[name] = module.options;
		}
		$.extend(this.proto, module.proto);
		this.modules.push(name);
	},

	defaults: {

		// Info about options is in docs:
		// http://dimsemenov.com/plugins/magnific-popup/documentation.html#options

		disableOn: 0,

		key: null,

		midClick: false,

		mainClass: '',

		preloader: true,

		focus: '', // CSS selector of input to focus after popup is opened

		closeOnContentClick: false,

		closeOnBgClick: true,

		closeBtnInside: true,

		showCloseBtn: true,

		enableEscapeKey: true,

		modal: false,

		alignTop: false,

		removalDelay: 0,

		prependTo: null,

		fixedContentPos: 'auto',

		fixedBgPos: 'auto',

		overflowY: 'auto',

		closeMarkup: '<button title="%title%" type="button" class="mfp-close">&#215;</button>',

		tClose: 'Close (Esc)',

		tLoading: 'Loading...',

		autoFocusLast: true

	}
};



$.fn.magnificPopup = function(options) {
	_checkInstance();

	var jqEl = $(this);

	// We call some API method of first param is a string
	if (typeof options === "string" ) {

		if(options === 'open') {
			var items,
				itemOpts = _isJQ ? jqEl.data('magnificPopup') : jqEl[0].magnificPopup,
				index = parseInt(arguments[1], 10) || 0;

			if(itemOpts.items) {
				items = itemOpts.items[index];
			} else {
				items = jqEl;
				if(itemOpts.delegate) {
					items = items.find(itemOpts.delegate);
				}
				items = items.eq( index );
			}
			mfp._openClick({mfpEl:items}, jqEl, itemOpts);
		} else {
			if(mfp.isOpen)
				mfp[options].apply(mfp, Array.prototype.slice.call(arguments, 1));
		}

	} else {
		// clone options obj
		options = $.extend(true, {}, options);

		/*
		 * As Zepto doesn't support .data() method for objects
		 * and it works only in normal browsers
		 * we assign "options" object directly to the DOM element. FTW!
		 */
		if(_isJQ) {
			jqEl.data('magnificPopup', options);
		} else {
			jqEl[0].magnificPopup = options;
		}

		mfp.addGroup(jqEl, options);

	}
	return jqEl;
};