/**
 * Based on
 * jQuery lightBox plugin by Leandro Vieira Pinho - http://leandrovieira.com
 * inspired and based on Lightbox 2 by Lokesh Dhakar (http://www.huddletogether.com/projects/lightbox2/).
 */
(function($) {
	$.fn.lightBox = function(settings) {

		settings = jQuery.extend({
			overlayBgColor: 		'#000',		// (string) Background color to overlay; inform a hexadecimal value like: #RRGGBB. Where RR, GG, and BB are the hexadecimal values for the red, green, and blue values of the color.
			overlayOpacity:			0.5,		// (integer) Opacity value to overlay; inform: 0.X. Where X are number from 0 to 9
			fixedNavigation:		true,		// (boolean) Boolean that informs if the navigation (next and prev button) will be fixed or not in the interface.
			imageLoading:			'/img/slideshow/loader.gif',		// (string) Path and the name of the loading icon
			imageBtnPrev:			'/img/slideshow/left.png',			// (string) Path and the name of the prev button image
			imageBtnNext:			'/img/slideshow/right.png',			// (string) Path and the name of the next button image
			imageBtnClose:			'/img/slideshow/ico_close.png',		// (string) Path and the name of the close btn
			imageBlank:				'/img/slideshow/lightbox-blank.gif',			// (string) Path and the name of a blank image (one pixel)
			// Configuration related to container image box
			containerResizeSpeed:	800,		// (integer) Specify the resize duration of container image. These number are miliseconds. 400 is default.
			txtImage:				'Obraz',
			txtOf:					'z',
			keyToClose:				'c', // (string) (c = close) Letter to close the jQuery lightBox interface. Beyond this letter, the letter X and the SCAPE key is used to.
			keyToPrev:				'p', // (string) (p = previous) Letter to show the previous image
			keyToNext:				'n', // (string) (n = next) Letter to show the next image.
			imageArray:				[],
			thumbsArray:			[],
			activeImage:			0,
			galleryBox:				'',
			galleryType:			'user'
		}, settings);
		
		// mozemy podac jako parametr gdzie znajduje sie galeria, moze byc gdziekolwiek na stronie
		var jQueryMatchedObj = (settings.galleryBox != '') ? $("#"+settings.galleryBox+" a") : this; // This, in this context, refer to jQuery object
		
		/**
		 * Initializing the plugin calling the start function
		 * @return boolean false
		 */
		function _initialize() {
			_start(this, jQueryMatchedObj); // This, in this context, refer to object (link) which the user have clicked
			return false; // Avoid the browser following the link
		}
		
		/**
		 * Start the jQuery lightBox plugin
		 * @param object jQueryMatchedObj The jQuery object with all elements matched
		 */
		function _start(objClicked, jQueryMatchedObj) {
			// Hide some elements to avoid conflict with overlay in IE. These elements appear above the overlay.
			$('embed, object, select').css({ 'visibility' : 'hidden' });
			_set_interface();
			settings.imageArray.length = 0;
			settings.activeImage = 0; 
			
			// Add an Array (as many as we have), with href and title atributes, inside the Array that storage the images references		
			for ( var i = 0; i < jQueryMatchedObj.length; i++ ) {
				settings.imageArray.push(new Array(jQueryMatchedObj[i].getAttribute('href'), jQueryMatchedObj[i].getAttribute('title'), jQueryMatchedObj[i].getAttribute('rel')));
				settings.thumbsArray.push(new Array(i, jQueryMatchedObj[i].getAttribute('title')));
			}
			if ((settings.galleryBox == '')) {
				while ( settings.imageArray[settings.activeImage][0] != objClicked.getAttribute('href') && settings.activeImage < settings.imageArray.length ) {
					settings.activeImage++;
				}
			}
			_set_image_to_view(); // Call the function that prepares image exibition
		}
		/**
		 * Create the jQuery lightBox plugin interface
		 *
		 * The HTML markup will be like that:
			<div id="jquery-lightbox-container">
			  <div id="jquery-lightbox">
			    <div id="lightbox-header">
			      <a href="#" id="lightbox-secNav-btnClose">Zamknij</a>
			      <p id="lightbox-header-title">Pokaz zdjęć:</p>
			    </div>
			    <div id="lightbox-container-image-box">
			      <a id="lightbox-download-file" href="">Kliknij, aby pobrać ten plik!</a>
			      <div id="lightbox-container-image">
			        <img src="" id="lightbox-image">
			        <div style="" id="lightbox-nav">
			          <a href="#" id="lightbox-nav-btnPrev"></a>
			          <a href="#" id="lightbox-nav-btnNext"></a>
			        </div>
			        <div id="lightbox-loading">
			          <a href="#" id="lightbox-loading-link">
			            <img src="' + settings.imageLoading + '">
			          </a>
			        </div>
			      </div>
			      <div id="lightbox-container-image-data">
			        <div id="lightbox-image-details">
			          <span id="lightbox-image-details-caption"></span>
			          <span id="lightbox-image-details-currentNumber"></span>
			        </div>
			        <div id="lightbox-pagination"></div>
			      </div>
			    </div>
			  </div>
			</div>
		 *
		 */
		function _set_interface() {
			var slideshowFrom = (settings.galleryType=='user') ? "użytkownika" : "z folderu";
			// Apply the HTML markup into body tag
			$('body').append('<div id="jquery-overlay"></div><div id="jquery-lightbox-container"><div id="jquery-lightbox"><div id="lightbox-header"><a href="#" id="lightbox-secNav-btnClose">Zamknij</a><p id="lightbox-header-title">Pokaz zdjęć ' + slideshowFrom + ':</p></div><div id="lightbox-container-image-box"><a id="lightbox-download-file" href="">Kliknij, aby pobrać ten plik!</a><div id="lightbox-container-image"><img src="' + settings.imageBlank + '" id="lightbox-image"><div style="" id="lightbox-nav"><a href="#" id="lightbox-nav-btnPrev"></a><a href="#" id="lightbox-nav-btnNext"></a></div><div id="lightbox-loading"><a href="#" id="lightbox-loading-link"><img src="' + settings.imageLoading + '"></a></div></div><div id="lightbox-container-image-data"><div id="lightbox-image-details"><span id="lightbox-image-details-caption"></span><span id="lightbox-image-details-currentNumber"></span></div><div id="lightbox-pagination"></div></div></div></div></div>');	
			// Get page sizes
			var arrPageSizes = ___getPageSize();
			// Style overlay and show it
			$('#jquery-overlay').css({
				backgroundColor:	settings.overlayBgColor,
				opacity:			settings.overlayOpacity,
				width:				arrPageSizes[0],
				height:				arrPageSizes[1]+150
			}).fadeIn();
			// Get page scroll
			var arrPageScroll = ___getPageScroll();
			// Calculate top and left offset for the jquery-lightbox div object and show it
			$('#jquery-lightbox-container').css({
				top:	arrPageScroll[1] + (arrPageSizes[3] / 10)
			}).show();
			
			// Assign the _finish function to lightbox-loading-link and lightbox-secNav-btnClose objects
			$('#lightbox-loading-link,#lightbox-secNav-btnClose').click(function() {
				_finish();
				return false;
			});
			// If window was resized, calculate the new overlay dimensions
			$(window).resize(function() {
				var arrPageSizes = ___getPageSize();
				$('#jquery-overlay').css({
					width:		arrPageSizes[0],
					height:		arrPageSizes[1]+150
				});
				var arrPageScroll = ___getPageScroll();
				$('#jquery-lightbox-container').css({
					top:	arrPageScroll[1] + (arrPageSizes[3] / 10)
				});
			});
		}
		/**
		 * Prepares image exibition; doing a image�s preloader to calculate it�s size
		 *
		 */
		function _set_image_to_view() { // show the loading
			// Show the loading
			$('#lightbox-loading').show();
			$("#lightbox-pagination").hide();
			$('#lightbox-download-file').css({ 'visibility': 'hidden' });
			$('#lightbox-image-details-caption').css({ 'visibility' : 'hidden' });
			if ( settings.fixedNavigation ) {
				$('#lightbox-image,#lightbox-container-image-data-box,#lightbox-nav').hide();
			} else {
				// Hide some elements
				$('#lightbox-image,#lightbox-nav,#lightbox-nav-btnPrev,#lightbox-nav-btnNext,#lightbox-container-image-data-box').hide();
			}
			// Image preload process
			var objImagePreloader = new Image();
			objImagePreloader.onload = function() {
				$('#lightbox-image').attr('src',settings.imageArray[settings.activeImage][0]);
				// Perfomance an effect in the image container resizing it
				_resize_container_image_box(objImagePreloader.width, objImagePreloader.height);
				//	clear onLoad, IE behaves irratically with animated gifs otherwise
				objImagePreloader.onload = function(){};
			};
			objImagePreloader.src = settings.imageArray[settings.activeImage][0];
		};
		/**
		 * Perfomance an effect in the image container resizing it
		 *
		 * @param integer intImageWidth The images width that will be showed
		 * @param integer intImageHeight The images height that will be showed
		 */
		function _resize_container_image_box(intImageWidth, intImageHeight) {
			var intCurrentHeight = $('#lightbox-container-image').height();
			var intHeight = intImageHeight;
			if (intHeight < 400) { intHeight = 400; }
			var intDiffH = intCurrentHeight - intHeight;
			
			// If we have a image set, display 'Image X of X'
			if ( settings.imageArray.length > 1 ) {
				$('#lightbox-image-details-currentNumber').html(settings.txtImage + ' <strong>' + ( settings.activeImage + 1 ) + '</strong> ' + settings.txtOf + ' <strong>' + settings.imageArray.length + '</strong>');
			}
			
			$('#lightbox-container-image').animate({ height: intHeight },settings.containerResizeSpeed,function() { _show_image(); });
			if (( intDiffH == 0 )) {
				if ( $.browser.msie ) {
					___pause(350);
				} else {
					___pause(200);	
				}
			}
			$('#lightbox-nav-btnPrev,#lightbox-nav-btnNext').css({ height: intImageHeight });
		};
		
		function _show_image() {
			_set_navigation();
			$('#lightbox-loading').hide();
			$('#lightbox-image').fadeIn(100, function() {
				_show_image_data();
				_add_pagination();
			});
			_preload_neighbor_images();
		};
		/**
		 * Show the image information
		 */
		function _show_image_data() {
			if ( settings.imageArray[settings.activeImage][2] ) {
				$('#lightbox-download-file').attr("href", settings.imageArray[settings.activeImage][2]);
				$('#lightbox-download-file').css({ 'visibility': 'visible' });
			}
			if ( settings.imageArray[settings.activeImage][1] ) {
				$('#lightbox-image-details-caption').html(settings.imageArray[settings.activeImage][1]).css({ 'visibility' : 'visible' });
			}
			$('#lightbox-container-image-data-box').fadeIn("slow");
		}
		
		function _add_pagination() {
			var intCurrent = settings.activeImage;
			var intCountElements = settings.imageArray.length;
			var listPagination = $(document.createElement('ul')).attr('id', 'list-pagination');
			var listElement;
			var tempIdent;
			for ( var i = 0; i < intCountElements; i++ ) {
				
				if (i==0 || i==intCountElements-1 || (i>=intCurrent-2 && i<=intCurrent+2) || intCountElements < 11) {
					_add_pagination_element(listPagination, i, intCurrent, intCountElements);
				} else if ((intCurrent<5 && i<8) || (intCurrent>intCountElements-6 && i>intCountElements-8)) {
					_add_pagination_element(listPagination, i, intCurrent, intCountElements);
				} else if (i==1 || i==intCountElements-2) {
					_add_dots_pagination(listPagination, i);
				}
			}
			$("#lightbox-pagination ul").remove();
			$("#lightbox-pagination").append(listPagination);
			$("#lightbox-pagination").show();
		}
		
		function _add_dots_pagination(listPagination, intNumber) {
			listElement = $(document.createElement('li'))
				.attr('id', 'elem'+intNumber)
				.addClass('elem-break')
				.html("...")
			listPagination.append(listElement);
		}
		
		function _add_pagination_element(listPagination, intNumber, intCurrent, intCountElements) {
			class_name = (intNumber == intCurrent) ? "current-image" : "";
			listElement = $(document.createElement('li'))
				.attr('id', 'elem'+intNumber)
				.html(intNumber+1)
				.addClass(class_name)
				.unbind()
				.bind('click',function() {
					tempIdent = parseInt($(this).attr("id").substring(4));
					settings.activeImage = tempIdent;
					_set_image_to_view();
					return false;
				});
			listPagination.append(listElement);
		}
		
		/**
		 * Display the button navigations
		 *
		 */
		function _set_navigation() {
			$('#lightbox-nav').show();

			// Instead to define this configuration in CSS file, we define here. And it�s need to IE. Just.
			$('#lightbox-nav-btnPrev,#lightbox-nav-btnNext').css({ 'background-image' : 'url(' + settings.imageBlank + ')' });
			
			// Show the prev button, if not the first image in set
			if ( settings.activeImage != 0 ) {
				if ( settings.fixedNavigation ) {
					$('#lightbox-nav-btnPrev').css({ 'background-image' : 'url(' + settings.imageBtnPrev + ')' })
						.unbind()
						.bind('click',function() {
							settings.activeImage = settings.activeImage - 1;
							_set_image_to_view();
							return false;
						});
				} else {
					// Show the images button for Next buttons
					$('#lightbox-nav-btnPrev').unbind().hover(function() {
						$(this).css({ 'background-image' : 'url(' + settings.imageBtnPrev + ')' });
					},function() {
						$(this).css({ 'background-image' : 'url(' + settings.imageBlank + ')' });
					}).show().bind('click',function() {
						settings.activeImage = settings.activeImage - 1;
						_set_image_to_view();
						return false;
					});
				}
			}
			
			// Show the next button, if not the last image in set
			if ( settings.activeImage != ( settings.imageArray.length -1 ) ) {
				if ( settings.fixedNavigation ) {
					$('#lightbox-nav-btnNext').css({ 'background-image' : 'url(' + settings.imageBtnNext + ')' })
						.unbind()
						.bind('click',function() {
							settings.activeImage = settings.activeImage + 1;
							_set_image_to_view();
							return false;
						});
				} else {
					// Show the images button for Next buttons
					$('#lightbox-nav-btnNext').unbind().hover(function() {
						$(this).css({ 'background-image' : 'url(' + settings.imageBtnNext + ')' });
					},function() {
						$(this).css({ 'background-image' : 'url(' + settings.imageBlank + ')' });
					}).show().bind('click',function() {
						settings.activeImage = settings.activeImage + 1;
						_set_image_to_view();
						return false;
					});
				}
			}
			// Enable keyboard navigation
			_enable_keyboard_navigation();
		}
		/**
		 * Enable a support to keyboard navigation
		 *
		 */
		function _enable_keyboard_navigation() {
			$(document).keydown(function(objEvent) {
				_keyboard_action(objEvent);
			});
		}
		/**
		 * Disable the support to keyboard navigation
		 *
		 */
		function _disable_keyboard_navigation() {
			$(document).unbind();
		}
		/**
		 * Perform the keyboard actions
		 *
		 */
		function _keyboard_action(objEvent) {
			// To ie
			if ( objEvent == null ) {
				keycode = event.keyCode;
				escapeKey = 27;
			// To Mozilla
			} else {
				keycode = objEvent.keyCode;
				escapeKey = objEvent.DOM_VK_ESCAPE;
			}
			// Get the key in lower case form
			key = String.fromCharCode(keycode).toLowerCase();
			// Verify the keys to close the ligthBox
			if ( ( key == settings.keyToClose ) || ( key == 'x' ) || ( keycode == escapeKey ) ) {
				_finish();
			}
			// Verify the key to show the previous image
			if ( ( key == settings.keyToPrev ) || ( keycode == 37 ) ) {
				// If we�re not showing the first image, call the previous
				if ( settings.activeImage != 0 ) {
					settings.activeImage = settings.activeImage - 1;
					_set_image_to_view();
					_disable_keyboard_navigation();
				}
			}
			// Verify the key to show the next image
			if ( ( key == settings.keyToNext ) || ( keycode == 39 ) ) {
				// If we�re not showing the last image, call the next
				if ( settings.activeImage != ( settings.imageArray.length - 1 ) ) {
					settings.activeImage = settings.activeImage + 1;
					_set_image_to_view();
					_disable_keyboard_navigation();
				}
			}
		}
		/**
		 * Preload prev and next images being showed
		 *
		 */
		function _preload_neighbor_images() {
			if ( (settings.imageArray.length -1) > settings.activeImage ) {
				objNext = new Image();
				objNext.src = settings.imageArray[settings.activeImage + 1][0];
			}
			if ( settings.activeImage > 0 ) {
				objPrev = new Image();
				objPrev.src = settings.imageArray[settings.activeImage -1][0];
			}
		}
		/**
		 * Remove jQuery lightBox plugin HTML markup
		 *
		 */
		function _finish() {
			$('#jquery-lightbox-container').remove();
			$('#jquery-overlay').fadeOut(function() { $('#jquery-overlay').remove(); });
			// Show some elements to avoid conflict with overlay in IE. These elements appear above the overlay.
			$('embed, object, select').css({ 'visibility' : 'visible' });
			$('#gallery-box').remove();
		}
		/**
		 / THIRD FUNCTION
		 * getPageSize() by quirksmode.com
		 *
		 * @return Array Return an array with page width, height and window width, height
		 */
		function ___getPageSize() {
			var xScroll, yScroll;
			if (window.innerHeight && window.scrollMaxY) {	
				xScroll = window.innerWidth + window.scrollMaxX;
				yScroll = window.innerHeight + window.scrollMaxY;
			} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
				xScroll = document.body.scrollWidth;
				yScroll = document.body.scrollHeight;
			} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
				xScroll = document.body.offsetWidth;
				yScroll = document.body.offsetHeight;
			}
			var windowWidth, windowHeight;
			if (self.innerHeight) {	// all except Explorer
				if(document.documentElement.clientWidth){
					windowWidth = document.documentElement.clientWidth; 
				} else {
					windowWidth = self.innerWidth;
				}
				windowHeight = self.innerHeight;
			} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
				windowWidth = document.documentElement.clientWidth;
				windowHeight = document.documentElement.clientHeight;
			} else if (document.body) { // other Explorers
				windowWidth = document.body.clientWidth;
				windowHeight = document.body.clientHeight;
			}	
			// for small pages with total height less then height of the viewport
			if(yScroll < windowHeight){
				pageHeight = windowHeight;
			} else { 
				pageHeight = yScroll;
			}
			// for small pages with total width less then width of the viewport
			if(xScroll < windowWidth){	
				pageWidth = xScroll;		
			} else {
				pageWidth = windowWidth;
			}
			arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight);
			return arrayPageSize;
		};
		/**
		 / THIRD FUNCTION
		 * getPageScroll() by quirksmode.com
		 *
		 * @return Array Return an array with x,y page scroll values.
		 */
		function ___getPageScroll() {
			var xScroll, yScroll;
			if (self.pageYOffset) {
				yScroll = self.pageYOffset;
				xScroll = self.pageXOffset;
			} else if (document.documentElement && document.documentElement.scrollTop) {	 // Explorer 6 Strict
				yScroll = document.documentElement.scrollTop;
				xScroll = document.documentElement.scrollLeft;
			} else if (document.body) {// all other Explorers
				yScroll = document.body.scrollTop;
				xScroll = document.body.scrollLeft;	
			}
			arrayPageScroll = new Array(xScroll,yScroll);
			return arrayPageScroll;
		};
		 /**
		  * Stop the code execution from a escified time in milisecond
		  *
		  */
		 function ___pause(ms) {
			var date = new Date(); 
			curDate = null;
			do { var curDate = new Date(); }
			while ( curDate - date < ms);
		 };
		// Return the jQuery object for chaining. The unbind method is used to avoid click conflict when the plugin is called more than once
		return this.unbind('click').click(_initialize);
	};
})(jQuery); // Call and execute the function immediately passing the jQuery object