/*
 * Overlay - jQuery plugin
 * Examples and documentation at: http://fancy.klade.lv/
 * Version: 1.0 (4/08/2009)
 * Copyright (c) 2009 Jacaranda
 * Licensed under the MIT License: http://en.wikipedia.org/wiki/MIT_License
 * Requires: jQuery v1.3+
*/


jQuery.fn.log = function (msg) {
    console.log("%s: %o", msg, this);
    return this;
};

;(function($) {

	$.fn.fixPNG = function() {
		return this.each(function () {
			var image = $(this).css('backgroundImage');

			if (image.match(/^url\(["']?(.*\.png)["']?\)$/i)) {
				image = RegExp.$1;
				$(this).css({
					'backgroundImage': 'none',
					'filter': "progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=true, sizingMethod=" + ($(this).css('backgroundRepeat') == 'no-repeat' ? 'crop' : 'scale') + ", src='" + image + "')"
				}).each(function () {
					var position = $(this).css('position');
					if (position != 'absolute' && position != 'relative')
						$(this).css('position', 'relative');
				});
			}
		});
	};

	var elem, opts, busy = false, history = [], loadingTimer, loadingFrame = 1, href = null;
	var isIE = ($.browser.msie && parseInt($.browser.version.substr(0,1)) < 8);
    //var isIE8 = ($.browser.msie && parseInt($.browser.version.substr(0,1)) < 9);
    
	$.fn.overlay = function(settings) {
		settings = $.extend({}, $.fn.overlay.defaults, settings);

		function _initialize() {
			elem = this;
			opts = settings;
			opts.scrollPos = null;
			_start();
			return false;
		};

		function _start() {
			if (busy) return;

			if ($.isFunction(opts.callbackOnStart)) {
				opts.callbackOnStart();
			}

			/*if (settings.href) {
				opts.href = settings.href;
			} else {*/
				if (!elem.rel || elem.rel == '') {
					opts.href = ($(elem).attr('href'))? $(elem).attr('href') : elem.href;
				} 
			//}
			
			opts.recordHistory = settings.recordHistory;
			if (!opts.recordHistory) {
				history = [];
			} else {
				if (history.length >= 1 && history[history.length -1] == opts.href) {
					history.pop();
				} else if (href != null) {
					history.push(href);
				}
				href = opts.href;
			}
			
			//if (isIE8) {
				$('embed, object, select').css('visibility', 'hidden');
			//}
			$("#overlay_overlay").css('opacity', opts.overlayOpacity).fadeIn("fast");
		
			_change_item();
		};

		function _change_item() {
			
			$("#overlay_close, #overlay_back").hide();

			var href = opts.href;

			if (href.match(/#/)) {
				var target = window.location.href.split('#')[0]; target = href.replace(target, ''); target = target.substr(target.indexOf('#'));
				_set_content('<div id="overlay_div">' + $(target).html() + '</div>', opts.frameWidth);
				
			 } else if (href.match("iframe") || elem.className.indexOf("iframe") >= 0) {
				_set_content('<iframe id="overlay_frame" onload="$.fn.overlay.showIframe()" name="overlay_iframe' + Math.round(Math.random()*1000) + '" frameborder="0" hspace="0" src="' + href + '"></iframe>', opts.frameWidth);

			} else {
				$.get(href, {ajax:'true'}, function(data) {
					_set_content( '<div id="overlay_ajax">' + data + '</div>', opts.frameWidth );
					if (opts.gat) {
						try {
	          				var pageTracker = _gat._getTracker("UA-11362530-1");
	          				pageTracker._trackPageview(href);
          				} catch(err) {}
          			}
				}, "html");
			}
		};


		function _set_content(value, width) {
			
			busy = true;
			//height = (height == 'auto')? 0 : height;
			opts.scrollPos = $(window).scrollTop();
			$(window).scrollTop(0);
		
			
			var pad = opts.padding;

			if (isIE) {
				$("#overlay_content")[0].style.removeExpression("height");
				$("#overlay_content")[0].style.removeExpression("width");
			}

			if (pad > 0) {
				width	+= pad * 2;
				//height	+= pad * 2;

				$("#overlay_content").css({
					'top'		: pad + 'px',
					'right'		: pad + 'px',
					'bottom'	: pad + 'px',
					'left'		: pad + 'px',
					'width'		: 'auto',
					'height'	: 'auto'
				});

				if (isIE) {
					//$("#overlay_content")[0].style.setExpression('height',	'(this.parentNode.clientHeight - 20)');
					$("#overlay_content")[0].style.setExpression('width',		'(this.parentNode.clientWidth - 20)');
				}

			} else {
				$("#overlay_content").css({
					'top'		: 0,
					'right'		: 0,
					'bottom'	: 0,
					'left'		: 0,
					'width'		: '100%',
					'height'	: '100%'
				});
			}
			
			if ($("#overlay_outer").is(":visible") && width == $("#overlay_outer").width()) {
				$("#overlay_content").fadeOut("fast", function() {
					$("#overlay_content").empty().append($(value)).fadeIn("normal", function() {
						_finish();
					});
				});
				return;
			}

			var w = $.fn.overlay.getViewport();

			var itemLeft	= (width + 36)	> w[0] ? w[2] : (w[2] + Math.round((w[0] - width - 36) / 2));
			//var itemTop		= (height + 50)	> w[1] ? w[3] : (w[3] + Math.round((w[1] - height - 50) / 2));
			var itemTop  = 65;
			var itemOpts = {
				'left':		itemLeft,
				'top':		itemTop,
				'width':	width + 'px',
				'height':	'auto'
			};

			if ($("#overlay_outer").is(":visible")) {
				$("#overlay_content").fadeOut("normal", function() {
					$("#overlay_content").empty();
					$("#overlay_outer").animate(itemOpts, opts.zoomSpeedChange, opts.easingChange, function() {
						$("#overlay_content").append($(value)).fadeIn("normal", function() {
							_finish();
						});
					});
				});

			} else {
				$("#overlay_content").hide().empty().append($(value)).show();
				$("#overlay_outer").css(itemOpts).fadeIn("normal", function() {
					_finish();
				});

			}
		};

		function _finish() {

			$(document).keydown(function(e) {
				if (e.keyCode == 27) {
					$.fn.overlay.close();
					$(document).unbind("keydown");

				}
			});

			if (opts.centerOnScroll) {
				$(window).bind("resize scroll", $.fn.overlay.scrollBox);
			} else {
				$("div#overlay_outer").css("position", "absolute");
			}

			if (opts.hideOnContentClick) {
				$("#overlay_wrap").click($.fn.overlay.close);
			}

			$("#overlay_overlay, #overlay_close").bind("click", $.fn.overlay.close);

			$("#overlay_close").show();
			
			
			if (opts.recordHistory && history.length > 0) {
				$("#overlay_back").attr('href',  history[history.length - 1]).addClass('window-link').show();
			}

			//if (isIE8) {
				$('embed, object, select', $('#overlay_content')).css('visibility', 'visible');
			//}

			if ($.isFunction(opts.callbackOnShow) ) {
				opts.callbackOnShow();
			}
		
			busy = false;
		};
		return this.unbind('click').click(_initialize);
	};

	$.fn.overlay.scrollBox = function() {
		var pos = $.fn.overlay.getViewport();
		
		$("#overlay_outer").css('left', (($("#overlay_outer").width()	+ 36) > pos[0] ? pos[2] : pos[2] + Math.round((pos[0] - $("#overlay_outer").width()	- 36)	/ 2)));

	};

	$.fn.overlay.getNumeric = function(el, prop) {
		return parseInt($.curCSS(el.jquery?el[0]:el,prop,true))||0;
	};

	$.fn.overlay.getPosition = function(el) {
		var pos = el.offset();

		pos.top	+= $.fn.overlay.getNumeric(el, 'paddingTop');
		pos.top	+= $.fn.overlay.getNumeric(el, 'borderTopWidth');

		pos.left += $.fn.overlay.getNumeric(el, 'paddingLeft');
		pos.left += $.fn.overlay.getNumeric(el, 'borderLeftWidth');

		return pos;
	};

	$.fn.overlay.showIframe = function() {
		$(".overlay_loading").hide();
		$("#overlay_frame").show();
	};

	$.fn.overlay.getViewport = function() {
		return [$(window).width(), $(window).height(), $(document).scrollLeft(), $(document).scrollTop() ];
	};

	$.fn.overlay.animateLoading = function() {
		if (!$("#overlay_loading").is(':visible')){
			clearInterval(loadingTimer);
			return;
		}

		$("#overlay_loading > div").css('top', (loadingFrame * -40) + 'px');

		loadingFrame = (loadingFrame + 1) % 12;
	};

	$.fn.overlay.showLoading = function() {
		clearInterval(loadingTimer);

		var pos = $.fn.overlay.getViewport();

		$("#overlay_loading").css({'left': ((pos[0] - 40) / 2 + pos[2]), 'top': ((pos[1] - 40) / 2 + pos[3])}).show();
		$("#overlay_loading").bind('click', $.fn.overlay.close);

		loadingTimer = setInterval($.fn.overlay.animateLoading, 66);
	};

	$.fn.overlay.close = function() {
		busy = true;
	
		$("#overlay_overlay, #overlay_close, #overlay_back").unbind();

		if (opts.hideOnContentClick) {
			$("#overlay_wrap").unbind();
		}

		$("#overlay_close, #overlay_back, .overlay_loading").hide();

		if (opts.centerOnScroll) {
		    $(window).scrollTop(opts.scrollPos);
			$(window).unbind("resize scroll");
		}

		__cleanup = function() {
			$("#overlay_overlay, #overlay_outer").hide();

			if (opts.centerOnScroll) {
			    $(window).scrollTop(opts.scrollPos);
				$(window).unbind("resize scroll");
			}

			//if (isIE8) {
				$('embed, object, select').css('visibility', 'visible');
			//}

			if ($.isFunction(opts.callbackOnClose)) {
				opts.callbackOnClose();
			}
			history = [];
			href = null;
			busy = false;
		};

		if ($("#overlay_outer").is(":visible") !== false) {
			$("#overlay_outer").stop(false, true).fadeOut("fast", __cleanup);
		} else {
			__cleanup();
		}
		
		return false;
	};
	
	$.fn.overlay.build = function() {
		var html = '';

		html += '<div id="overlay_overlay"></div>';

		html += '<div id="overlay_wrap">';

		html += '<div class="overlay_loading" id="overlay_loading"><div></div></div>';

		html += '<div id="overlay_outer">';

		html += '<div id="overlay_back"></div>';

		html += '<div id="overlay_close"></div>';

		html += '<div id="overlay_content"></div>';

		html += '</div>';

		html += '</div>';

		$(html).appendTo("body");

		if (isIE) {
			$("#overlay_outer").prepend('<iframe class="overlay_bigIframe" scrolling="no" frameborder="0"></iframe>');
			$("#overlay_close, #overlay_back").fixPNG();
		}
	};

	$.fn.overlay.defaults = {
		padding				:	10,
		zoomSpeedChange		:	300,
		easingIn			:	'swing',
		easingOut			:	'swing',
		easingChange		:	'swing',
		frameWidth			:	425,
		overlayOpacity		:	0.3,
		recordHistory		:	true,
		hideOnContentClick	:	true,
		centerOnScroll		:	true,
		href				:	null,
		callbackOnStart		:	null,
		callbackOnShow		:	null,
		callbackOnClose		:	null,
		gat					:	false
	};

	$(document).ready(function() {
		$.fn.overlay.build();
	});

})(jQuery);