/**
 * jQuery lightBox plugin
 * This jQuery plugin was inspired and based on Lightbox 2 by Lokesh Dhakar (http://www.huddletogether.com/projects/lightbox2/)
 * and adapted to me for use like a plugin from jQuery.
 * @name jquery-lightbox-0.5.js
 * @author Leandro Vieira Pinho - http://leandrovieira.com
 * @version 0.5
 * @date April 11, 2008
 * @category jQuery plugin
 * @copyright (c) 2008 Leandro Vieira Pinho (leandrovieira.com)
 * @license CC Attribution-No Derivative Works 2.5 Brazil - http://creativecommons.org/licenses/by-nd/2.5/br/deed.en_US
 * @example Visit http://leandrovieira.com/projects/jquery/lightbox/ for more informations about this jQuery plugin
 */

// Offering a Custom Alias suport - More info: http://docs.jquery.com/Plugins/Authoring#Custom_Alias
(function($) {
	/**
	 * $ is an alias to jQuery object
	 *
	 */
	$.fn.lightBox = function(settings) {
		// Settings to configure the jQuery lightBox plugin how you like
		settings = jQuery.extend({
			
			overlayBgColor: 		'#000',	
			overlayOpacity:			0.8,		// (integer) Opacity value to overlay; inform: 0.X. Where X are number from 0 to 9
			
			fixedNavigation:		false,	
			
			imageLoading:			'images/lightbox-ico-loading.gif',
			imageBtnPrev:			'images/lightbox-btn-prev.gif',
			imageBtnNext:			'images/lightbox-btn-next.gif',
			imageBtnClose:			'images/lightbox-btn-close.gif',
			imageBlank:				'images/lightbox-blank.gif',
			
			containerBorderSize:	10,
			containerResizeSpeed:	400,
			
			txtImage:				'Image',
			txtOf:					'of',
			
			keyToClose:				'c',
			keyToPrev:				'p',
			keyToNext:				'n',
			// Donīt alter these variables in any way
			imageArray:				[],
			activeImage:			0,
			showNavigation:			false
		},settings);
		
		var jQueryMatchedObj = this;
		/**
		 * 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 objClicked The object (link) whick the user have clicked
		 * @param object jQueryMatchedObj The jQuery object with all elements matched
		 */
		function _start(objClicked,jQueryMatchedObj) {
			// Hime some elements to avoid conflict with overlay in IE. These elements appear above the overlay.
			$('embed, object, select').css({ 'visibility' : 'hidden' });
			// Call the function to create the markup structure; style some elements; assign events in some elements.
			_set_interface();
			// Unset total images in imageArray
			settings.imageArray.length = 0;
			// Unset image active information
			settings.activeImage = 0;
			// We have an image set? Or just an image? Letīs see it.
			if ( jQueryMatchedObj.length == 1 ) {
				settings.imageArray.push(new Array(objClicked.getAttribute('href'),objClicked.getAttribute('title')));
			} else {
				// 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')));
				}
			}
			while ( settings.imageArray[settings.activeImage][0] != objClicked.getAttribute('href') ) {
				settings.activeImage++;
			}
			// Call the function that prepares image exibition
			
			
			if(settings.showNavigation && settings.imageArray.length > 1){
				$.each(settings.imageArray, function(index, value) {
					id = 'lightbox-numeros-'+index;
					texto = '<span id="'+id+'">'+(parseInt(index) + 1)+'</span>';
					//$("#lightbox-numeros-wrapper").append(texto);
					$("#lightbox-numeros").append(texto);
					$("#"+id).click(function(){
						settings.activeImage = index;
						_set_image_to_view();
						return false;
					});
					if(settings.imageArray.length > (parseInt(index) + 1)){
						//$("#lightbox-numeros-wrapper").append("/");
						$("#lightbox-numeros").append("/");
					}
				});
			} else {
				$("#lightbox-numeros").remove();
			}
			
			
			_set_image_to_view();
		}
		
		function _set_interface() {
			// Apply the HTML markup into body tag
			var markup = '';
			markup += '	<div id="jquery-overlay"></div>';
			markup += '	<div id="jquery-lightbox">';
			markup += '		<div id="lightbox-container-image-box">';
			markup += '			<div id="lightbox-container-image">';
			markup += '				<img id="lightbox-image"/>';
			markup += '				<div style="" id="lightbox-nav">';
			markup += '					<a href="#" id="lightbox-nav-btnPrev" style="display:none;"></a>';
			markup += '					<a href="#" id="lightbox-nav-btnNext" style="display:none;"></a>';
			markup += '				</div>';
			markup += '				<div id="lightbox-loading">';
			markup += '					<a href="#" id="lightbox-loading-link"><img src="' + settings.imageLoading + '"></a>';
			markup += '				</div>';
			markup += '			</div>';
			markup += '		</div>';
			markup += '		<div id="lightbox-numeros">';
			//markup += '			<div id="lightbox-numeros-wrapper"></div>';
			markup += '		</div>';
			markup += '		<div id="lightbox-container-image-data-box">';			
			markup += '				<a href="#" id="lightbox-secNav-btnClose"><img src="' + settings.imageBtnClose + '"></a>';
			markup += '		</div>';
			markup += '	</div>';
								
			$('body').append(markup);
			// 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]
			}).fadeIn();
			// Get page scroll
			var arrPageScroll = ___getPageScroll();
			// Calculate top and left offset for the jquery-lightbox div object and show it
			$('#jquery-lightbox').css({
				top:	arrPageScroll[1] + (arrPageSizes[3] / 10),
				left:	arrPageScroll[0]
			}).show();
			// Assigning click events in elements to close overlay
			$('#jquery-overlay,#jquery-lightbox').click(function() {
				_finish();									
			});
			// 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() {
				// Get page sizes
				var arrPageSizes = ___getPageSize();
				// Style overlay and show it
				$('#jquery-overlay').css({
					width:		arrPageSizes[0],
					height:		arrPageSizes[1]
				});
				// Get page scroll
				var arrPageScroll = ___getPageScroll();
				// Calculate top and left offset for the jquery-lightbox div object and show it
				$('#jquery-lightbox').css({
					top:	arrPageScroll[1] + (arrPageSizes[3] / 10),
					left:	arrPageScroll[0]
				});
			});
		}
		/**
		 * Prepares image exibition; doing a imageīs preloader to calculate itīs size
		 *
		 */
		function _set_image_to_view() { // show the loading
			// Show the loading			
			$('#lightbox-loading').show();
			
			if( !settings.showNavigation ) {
				$('#lightbox-image,#lightbox-nav,#lightbox-nav-btnPrev,#lightbox-nav-btnNext,#lightbox-container-image-data-box').hide();
			} else if ( settings.fixedNavigation ) {
				$('#lightbox-image,#lightbox-container-image-data-box').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').remove();
				$('#lightbox-container-image').prepend('<img width="'+objImagePreloader.width+'" height="'+objImagePreloader.height+'" id="lightbox-image" style="display: inline;" src="'+settings.imageArray[settings.activeImage][0]+'">');
				//$("#lightbox-numeros-wrapper span").removeClass("lightbox-numeros-current");
				$("#lightbox-numeros span").removeClass("lightbox-numeros-current");
				$("#lightbox-numeros-"+settings.activeImage).addClass("lightbox-numeros-current");
				//alert(settings.activeImage);
				/*$('#lightbox-image').attr('src',settings.imageArray[settings.activeImage][0]);
				$('#lightbox-image').attr('width', objImagePreloader.width);
				$('#lightbox-image').attr('height', objImagePreloader.height);*/
				// 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 imageīs width that will be showed
		 * @param integer intImageHeight The imageīs height that will be showed
		 */
		function _resize_container_image_box(intImageWidth,intImageHeight) {
			
			// Get current width and height
			var intCurrentWidth = $('#lightbox-container-image-box').width();
			var intCurrentHeight = $('#lightbox-container-image-box').height();
			// Get the width and height of the selected image plus the padding
			var intWidth = (intImageWidth + (settings.containerBorderSize * 2)); // Plus the imageīs width and the left and right padding value
			var intHeight = (intImageHeight + (settings.containerBorderSize * 2)); // Plus the imageīs height and the left and right padding value
			// Diferences
			var intDiffW = intCurrentWidth - intWidth;
			var intDiffH = intCurrentHeight - intHeight;
			// Perfomance the effect
			//$('#lightbox-container-image-box').animate({ width: (intWidth+96), height: intHeight },settings.containerResizeSpeed,function() { _show_image(); });
			//$('#lightbox-container-image-box').animate({ width: "600", height: "600" },settings.containerResizeSpeed, function() { _show_image(); });
			
			
			//alert(intHeight);
			$('#lightbox-container-image-box').css("width", "600px");
			$('#lightbox-container-image-box').css("height", intHeight);
			
			_show_image();
		
			if ( ( intDiffW == 0 ) && ( intDiffH == 0 ) ) {
				if ( $.browser.msie ) {
					___pause(250);
				} else {
					___pause(100);	
				}
			} 
			
			//$("#lightbox-container-image").css({"margin-top": "10px", "margin-bottom":"10px"} );
			$('#lightbox-nav').css('width','600px');
			
			$('#lightbox-container-image-data-box').css("width", "580px");
			
			//$('#lightbox-nav-btnPrev,#lightbox-nav-btnNext').css('margin-top', (intHeight-50) / 2);
			$('#lightbox-nav-btnPrev,#lightbox-nav-btnNext').css('height', intHeight + 20);
			
		};
		/**
		 * Show the prepared image
		 *
		 */
		function _show_image() {
			$('#lightbox-loading').hide();
			
			$('#lightbox-image').fadeIn(function() {
				_show_image_data();
				_set_navigation();
				try{ $("#lightbox-image").ifixpng(); } catch(e){};
			});
			
			_preload_neighbor_images();
		};
		/**
		 * Show the image information
		 *
		 */
		function _show_image_data() {
			//$('#lightbox-container-image-data-box').slideDown('fast');
			$('#lightbox-container-image-data-box').show();
			
			
				
		}
		/**
		 * Display the button navigations
		 *
		 */
		function _set_navigation() {
			if(!settings.showNavigation){
				return;
			} 
			
			$('#lightbox-nav').show();
			
			// Instead to define this configuration in CSS file, we define here. And itīs need to IE. Just.
			//$('#lightbox-nav-btnPrev,#lightbox-nav-btnNext').css({ 'background' : 'transparent url(' + settings.imageBlank + ') no-repeat' });
			
			// Show the prev button, if not the first image in set
			
			if ( settings.activeImage != 0 ) {
				
				if ( settings.fixedNavigation ) {
					$('#lightbox-nav-btnPrev').show()
						.unbind().bind('click',function() {
							settings.activeImage = settings.activeImage - 1;
							_set_image_to_view();
							return false;
						});
					
				} else {
					$('#lightbox-nav-btnPrev').unbind().hover(function() {
						
					},function() {
						//$(this).css({ 'background' : 'transparent url(' + settings.imageBlank + ') no-repeat' });
					}).show().bind('click',function() {
						settings.activeImage = settings.activeImage - 1;
						_set_image_to_view();
						return false;
					});
				}
			} else {
				$('#lightbox-nav-btnPrev').hide();
			}
			
			// Show the next button, if not the last image in set
			if ( settings.activeImage != ( settings.imageArray.length -1 ) ) {
				
				if ( settings.fixedNavigation ) {					
					$('#lightbox-nav-btnNext').show()
						.unbind().bind('click',function() {
							settings.activeImage = settings.activeImage + 1;
							_set_image_to_view();
							return false;
						});
					
				} else {
					$('#lightbox-nav-btnNext').unbind().hover(function() {
					
					},function() {
						//$(this).css({ 'background' : 'transparent url(' + settings.imageBlank + ') no-repeat' });
					}).show().bind('click',function() {
						settings.activeImage = settings.activeImage + 1;
						_set_image_to_view();
						return false;
					});
				}
				
			} else {
				$('#lightbox-nav-btnNext').hide();
			}
			// 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 weīre 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 weīre 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').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' });
		}
		/**
		 / 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