/**
 * 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 CCAttribution-ShareAlike 2.5 Brazil - http://creativecommons.org/licenses/by-sa/2.5/br/deed.en_US
 * @example Visit http://leandrovieira.com/projects/jquery/lightbox/ for more informations about this jQuery plugin
 */
(function($) {
	$.fn.lightBox = function(settings) {
		settings = jQuery.extend({
			overlayBgColor: '#000',
			overlayOpacity: 0.8,
			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: 0,
			containerResizeSpeed: 400,
			txtImage: 'Image',
			txtOf: 'of',
			keyToClose: 'c',
			keyToPrev: 'p',
			keyToNext: 'n',
			imageArray: [],
			activeImage: 0
		}, settings);
		var jQueryMatchedObj = this;

		function _initialize() {
			_start(this, jQueryMatchedObj);
			return false;
		}

		function _start(objClicked, jQueryMatchedObj) {
			$('embed, object, select').css({
				'visibility': 'hidden'
			});
			_set_interface();
			settings.imageArray.length = 0;
			settings.activeImage = 0;
			if (jQueryMatchedObj.length == 1) {
				settings.imageArray.push(new Array(objClicked.getAttribute('href'), objClicked.getAttribute('title')));
			} else {
				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++;
			}
			_set_image_to_view();
		}

		function _set_interface() {
			$('body').append('<div id="jquery-overlay"></div><div id="jquery-lightbox"><div id="lightbox-container-image-box"><div id="lightbox-container-image"><img 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><div id="lightbox-container-image-data-box"><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-secNav"><a href="#" id="lightbox-secNav-btnClose"><img src="' + settings.imageBtnClose + '"></a></div></div></div></div>');
			var arrPageSizes = ___getPageSize();
			$('#jquery-overlay').css({
				backgroundColor: settings.overlayBgColor,
				opacity: settings.overlayOpacity,
				width: arrPageSizes[0],
				height: arrPageSizes[1]
			}).fadeIn();
			var arrPageScroll = ___getPageScroll();
			$('#jquery-lightbox').css({
				top: arrPageScroll[1] + (arrPageSizes[3] / 10),
				left: arrPageScroll[0]
			}).show();
			$('#jquery-overlay,#jquery-lightbox').click(function() {
				_finish();
			});
			$('#lightbox-loading-link,#lightbox-secNav-btnClose').click(function() {
				_finish();
				return false;
			});
			$(window).resize(function() {
				var arrPageSizes = ___getPageSize();
				$('#jquery-overlay').css({
					width: arrPageSizes[0],
					height: arrPageSizes[1]
				});
				var arrPageScroll = ___getPageScroll();
				$('#jquery-lightbox').css({
					top: arrPageScroll[1] + (arrPageSizes[3] / 10),
					left: arrPageScroll[0]
				});
			});
		}

		function _set_image_to_view() {
			$('#lightbox-loading').show();
			if (settings.fixedNavigation) {
				$('#lightbox-image,#lightbox-container-image-data-box,#lightbox-image-details-currentNumber').hide();
			} else {
				$('#lightbox-image,#lightbox-nav,#lightbox-nav-btnPrev,#lightbox-nav-btnNext,#lightbox-container-image-data-box,#lightbox-image-details-currentNumber').hide();
			}
			var objImagePreloader = new Image();
			objImagePreloader.onload = function() {
				$('#lightbox-image').attr('src', settings.imageArray[settings.activeImage][0]);
				_resize_container_image_box(objImagePreloader.width, objImagePreloader.height);
				objImagePreloader.onload = function() {};
			};
			objImagePreloader.src = settings.imageArray[settings.activeImage][0];
		};

		function _resize_container_image_box(intImageWidth, intImageHeight) {
			var intCurrentWidth = $('#lightbox-container-image-box').width();
			var intCurrentHeight = $('#lightbox-container-image-box').height();
			var intWidth = (intImageWidth + (settings.containerBorderSize * 2));
			var intHeight = (intImageHeight + (settings.containerBorderSize * 2));
			var intDiffW = intCurrentWidth - intWidth;
			var intDiffH = intCurrentHeight - intHeight;
			$('#lightbox-container-image-box').animate({
				width: intWidth,
				height: intHeight
			}, settings.containerResizeSpeed, function() {
				_show_image();
			});
			if ((intDiffW == 0) && (intDiffH == 0)) {
				if ($.browser.msie) {
					___pause(250);
				} else {
					___pause(100);
				}
			}
			$('#lightbox-container-image-data-box').css('max-width', intImageWidth);
			$('#lightbox-nav-btnPrev,#lightbox-nav-btnNext').css({
				height: intImageHeight + (settings.containerBorderSize * 2)
			});
		};

		function _show_image() {
			$('#lightbox-loading').hide();
			$('#lightbox-image').fadeIn(function() {
				_show_image_data();
				_set_navigation();
			});
			_preload_neighbor_images();
		};

		function _show_image_data() {
			$('#lightbox-container-image-data-box').slideDown('fast');
			$('#lightbox-image-details-caption').hide();
			if (settings.imageArray[settings.activeImage][1]) {
				$('#lightbox-image-details-caption').html(settings.imageArray[settings.activeImage][1]).show();
			}
			if (settings.imageArray.length > 1) {
				$('#lightbox-image-details-currentNumber').html(settings.txtImage + ' ' + (settings.activeImage + 1) + ' ' + settings.txtOf + ' ' + settings.imageArray.length).show();
			}
		}

		function _set_navigation() {
			$('#lightbox-nav').show();
			$('#lightbox-nav-btnPrev,#lightbox-nav-btnNext').css({
				'background': 'transparent url(' + settings.imageBlank + ') no-repeat'
			});
			if (settings.activeImage != 0) {
				if (settings.fixedNavigation) {
					$('#lightbox-nav-btnPrev').css({
						'background': 'url(' + settings.imageBtnPrev + ') left 15% no-repeat'
					}).unbind().bind('click', function() {
						settings.activeImage = settings.activeImage - 1;
						_set_image_to_view();
						return false;
					});
				} else {
					$('#lightbox-nav-btnPrev').unbind().hover(function() {
						$(this).css({
							'background': 'url(' + settings.imageBtnPrev + ') left 15% no-repeat'
						});
					}, 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;
					});
				}
			}
			if (settings.activeImage != (settings.imageArray.length - 1)) {
				if (settings.fixedNavigation) {
					$('#lightbox-nav-btnNext').css({
						'background': 'url(' + settings.imageBtnNext + ') right 15% no-repeat'
					}).unbind().bind('click', function() {
						settings.activeImage = settings.activeImage + 1;
						_set_image_to_view();
						return false;
					});
				} else {
					$('#lightbox-nav-btnNext').unbind().hover(function() {
						$(this).css({
							'background': 'url(' + settings.imageBtnNext + ') right 15% no-repeat'
						});
					}, 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;
					});
				}
			}
			_enable_keyboard_navigation();
		}

		function _enable_keyboard_navigation() {
			$(document).keydown(function(objEvent) {
				_keyboard_action(objEvent);
			});
		}

		function _disable_keyboard_navigation() {
			$(document).unbind();
		}

		function _keyboard_action(objEvent) {
			if (objEvent == null) {
				keycode = event.keyCode;
				escapeKey = 27;
			} else {
				keycode = objEvent.keyCode;
				escapeKey = objEvent.DOM_VK_ESCAPE;
			}
			key = String.fromCharCode(keycode).toLowerCase();
			if ((key == settings.keyToClose) || (key == 'x') || (keycode == escapeKey)) {
				_finish();
			}
			if ((key == settings.keyToPrev) || (keycode == 37)) {
				if (settings.activeImage != 0) {
					settings.activeImage = settings.activeImage - 1;
					_set_image_to_view();
					_disable_keyboard_navigation();
				}
			}
			if ((key == settings.keyToNext) || (keycode == 39)) {
				if (settings.activeImage != (settings.imageArray.length - 1)) {
					settings.activeImage = settings.activeImage + 1;
					_set_image_to_view();
					_disable_keyboard_navigation();
				}
			}
		}

		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];
			}
		}

		function _finish() {
			$('#jquery-lightbox').remove();
			$('#jquery-overlay').fadeOut(function() {
				$('#jquery-overlay').remove();
			});
			$('embed, object, select').css({
				'visibility': 'visible'
			});
		}

		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) {
				xScroll = document.body.scrollWidth;
				yScroll = document.body.scrollHeight;
			} else {
				xScroll = document.body.offsetWidth;
				yScroll = document.body.offsetHeight;
			}
			var windowWidth, windowHeight;
			if (self.innerHeight) {
				if (document.documentElement.clientWidth) {
					windowWidth = document.documentElement.clientWidth;
				} else {
					windowWidth = self.innerWidth;
				}
				windowHeight = self.innerHeight;
			} else if (document.documentElement && document.documentElement.clientHeight) {
				windowWidth = document.documentElement.clientWidth;
				windowHeight = document.documentElement.clientHeight;
			} else if (document.body) {
				windowWidth = document.body.clientWidth;
				windowHeight = document.body.clientHeight;
			}
			if (yScroll < windowHeight) {
				pageHeight = windowHeight;
			} else {
				pageHeight = yScroll;
			}
			if (xScroll < windowWidth) {
				pageWidth = xScroll;
			} else {
				pageWidth = windowWidth;
			}
			arrayPageSize = new Array(pageWidth, pageHeight, windowWidth, windowHeight);
			return arrayPageSize;
		};

		function ___getPageScroll() {
			var xScroll, yScroll;
			if (self.pageYOffset) {
				yScroll = self.pageYOffset;
				xScroll = self.pageXOffset;
			} else if (document.documentElement && document.documentElement.scrollTop) {
				yScroll = document.documentElement.scrollTop;
				xScroll = document.documentElement.scrollLeft;
			} else if (document.body) {
				yScroll = document.body.scrollTop;
				xScroll = document.body.scrollLeft;
			}
			arrayPageScroll = new Array(xScroll, yScroll);
			return arrayPageScroll;
		};

		function ___pause(ms) {
			var date = new Date();
			curDate = null;
			do {
				var curDate = new Date();
			}
			while (curDate - date < ms);
		};
		return this.unbind('click').click(_initialize);
	};
})(jQuery);