$(document).ready( function() {
	
	function resize() {
		var dialog = $('#dialog');
		var width = dialog.width();
		var pageSizes = ___getPageSize();
		var pageScroll = ___getPageScroll();
		dialog.css( {
			top: pageScroll[1] + 100,
			left: pageScroll[0] + ( pageSizes[2] / 2 ) - ( dialog.width() / 2 )
		} );
	}
	
	function session( id ) {
		
		// Create the dialog if necessary
		var dialog = $('#dialog');
		if( dialog.length == 0 ) {
			
			// Add the dialog
			$('body').append(
				'<div id="dialog">' +
					'<div class="dialog-top"></div>' +
					'<div class="dialog-middle">' +
						'<a href="#" class="dialog-close">Close</a>' +
						'<div class="dialog-content">' +
							'<h1>Loading...</h1>' +
						'</div>' +
					'</div>' +
					'<div class="dialog-bottom"></div>' +
				'</div>' );
			dialog = $('#dialog');
			
			// Add close event
			dialog.find( 'a.dialog-close' ).click( function() {
				$('#dialog').hide();
				return false;
			} );
			
			// Add scroll event
			//$(window).scroll( resize );
			
		}
		
		// Update the contents of the dialog
		resize();
		dialog.show();
		$.post(
			'/api/json/conference/session/detail',
			{'id': id},
			function( result ) {
				dialog.find( '.dialog-content' ).html( result.html );
			},
			'json' );
		
	};
	
	/**
	 * 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;
	};
	
	/**
	 * 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;
	};
	
	// Open dialog when more info is clicked
	$('.session .info').click( function() {
		var row = $(this).parents( '.session' );
		var className = row.attr( 'class' );
		var id = className.substr( className.indexOf( '-' ) + 1 );
		session( id );
		return false;
	} );
	
} );