$(document).ready(function () {
    $('.play_btn').videoLightBox( {
		videoLoadUrl: '/ajax_videos.aspx',
		imageLoading:			'/images/lightbox-loading.gif',
		imageBtnClose:			'/images/lightbox-btn-close.gif',
		imageBlank:				'/images/lightbox-blank.gif' }
	);
});


/**
* jQuery videoLightBox plugin
* This plugin is based on the jQuery lightbox plugin by Leandro Vieira Pinho - http://leandrovieira.com/projects/jquery/lightbox/
*/
(function($) {

	$.fn.videoLightBox = function(settings) {

		settings = jQuery.extend({

			overlayBgColor: 		'#000',	
			overlayOpacity:			0.8,
			imageLoading:			'images/lightbox-loading.gif',		// (string) Path and the name of the loading icon
			imageBtnClose:			'images/lightbox-close.gif',		// (string) Path and the name of the close btn
			imageBlank:				'images/lightbox-blank.gif',			// (string) Path and the name of a blank image (one pixel)
			// Configuration related to container image box
			containerBorderSize:	10,	
			containerResizeSpeed:	400,		
			// Configuration related to keyboard navigation
			keyToClose:				'c',
			// Don´t alter these variables in any way
			videoID:				'',
			activeVideo:			0,
			videoWidth:				640,
			videoHeight:			385,
			videoLoadUrl:			''
		},settings);
		
		var jQueryMatchedObj = 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 videoLightBox 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.videoID = '';
			// Unset image active information
			settings.activeVideo = 0;
			
			settings.videoID = objClicked.getAttribute('id');
			
			// Call the function that prepares video exibition
			_set_video_to_view();
		}
		/**
		 * Create the jQuery lightBox plugin interface
		 *
		 */
		function _set_interface() {
			// Apply the HTML markup into body tag
			$('body').append('<div id="jquery-overlay"></div><div id="jquery-lightbox"><div id="lightbox-container-video-box"><div id="lightbox-nav"><a id="lightbox-nav-btnClose"><img src="' + settings.imageBtnClose + '"></a></div><div id="lightbox-container-video"><div id="lightbox-loading"><a id="lightbox-loading-link"><img src="' + settings.imageLoading + '"></a></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]
			}).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-nav-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 image´s preloader to calculate it´s size
		 *
		 */
		function _set_video_to_view() {
			// Show the loading
			$('#lightbox-loading').show();
			
			$('#lightbox-nav').hide();
			
			// call the ajax load method to get the video details from the server
			$('#lightbox-container-video').load(settings.videoLoadUrl, {'video_id': settings.videoID}, function(responseText, textStatus) {
				if (textStatus == 'error') {
					alert('Video could not be retrieved!');
					_finish();
				} else {
					_resize_container_box(settings.videoWidth, settings.videoHeight);
				}
			});
		};
		/**
		 * Perfomance an effect in the image container resizing it
		 *
		 * @param integer intImageWidth The image´s width that will be showed
		 * @param integer intImageHeight The image´s height that will be showed
		 */
		function _resize_container_box(intVideoWidth,intVideoHeight) {
			// Get current width and height
			var intCurrentWidth = $('#lightbox-container-video-box').width();
			var intCurrentHeight = $('#lightbox-container-video-box').height();
			// Get the width and height of the selected image plus the padding
			var intWidth = (intVideoWidth + (settings.containerBorderSize * 2));
			var intHeight = (intVideoHeight + (settings.containerBorderSize * 2));
			// Diferences
			var intDiffW = intCurrentWidth - intWidth;
			var intDiffH = intCurrentHeight - intHeight;
			// Perfomance the effect
			$('#lightbox-container-video-box').animate({ width: intWidth, height: intHeight },settings.containerResizeSpeed,function() { _show(); });
			if ( ( intDiffW == 0 ) && ( intDiffH == 0 ) ) {
				if ( $.browser.msie ) {
					___pause(250);
				} else {
					___pause(100);	
				}
			} 
		};
		/**
		 * Show the prepared image
		 *
		 */
		function _show() {
			$('#lightbox-loading').hide();
			$('#lightbox-nav').show();
			$('#lightbox-video').fadeIn(function() {
				_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();
			}
		}

		/**
		 * 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