/*
	Lightbox JS: Fullsize Image Overlays 
	by Lokesh Dhakar - http://www.huddletogether.com

	For more information on this script, visit:
	http://huddletogether.com/projects/lightbox/

	Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
	(basically, do anything you want, just leave my name and link)
	
	Table of Contents
	-----------------
	Configuration
	
	Functions
	- getPageScroll()
	- getPageSize()
	- pause()
	- getKey()
	- listenKey()
	- showLightbox()
	- hideLightbox()
	- initLightbox()
	- addLoadEvent()
	
	Function Calls
	- addLoadEvent(initLightbox)

*/



//
// Configuration
//

// If you would like to use a custom loading image or close button reference them in the next two lines.
var loadingImage = 'loading.gif';		
var closeButton = 'close.gif';
var baseHref = 'http://' + location.hostname + '/';

var commentSubmitButtonDisabled = false;


//
// getPageScroll()
// Returns array with x,y page scroll values.
// Core code from - quirksmode.org
//
function getPageScroll(){

	var yScroll;

	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
	} else if (document.body) {// all other Explorers
		yScroll = document.body.scrollTop;
	}

	arrayPageScroll = new Array('',yScroll) 
	return arrayPageScroll;
}



//
// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.org
// Edit for Firefox by pHaez
//
function getPageSize(){
	
	var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = document.body.scrollWidth;
		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
		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 = windowWidth;
	} else {
		pageWidth = xScroll;
	}


	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}


//
// pause(numberMillis)
// Pauses code execution for specified time. Uses busy code, not good.
// Code from http://www.faqts.com/knowledge_base/view.phtml/aid/1602
//
function pause(numberMillis) {
	var now = new Date();
	var exitTime = now.getTime() + numberMillis;
	while (true) {
		now = new Date();
		if (now.getTime() > exitTime)
			return;
	}
}

//
// getKey(key)
// Gets keycode. If 'x' is pressed then it hides the lightbox.
//

function getKey(e){
	if (e == null) { // ie
		keycode = event.keyCode;
	} else { // mozilla
		keycode = e.which;
	}
	key = String.fromCharCode(keycode).toLowerCase();
	
	//if(key == 'x'){ hideLightbox(); }
}


//
// listenKey()
//
function listenKey () {	document.onkeypress = getKey; }
	

//
// showLightbox()
// Preloads images. Pleaces new image in lightbox then centers and displays.
//
function showLightbox(objLink)
{
	// prep objects
	var objOverlay = document.getElementById('overlay');
	var objLightbox = document.getElementById('lightbox');
	var objCaption = document.getElementById('lightboxCaption');
	var objImage = document.getElementById('lightboxImage');
	var objLoadingImage = document.getElementById('loadingImage');
	var objLightboxDetails = document.getElementById('lightboxDetails');
	var objComments = document.getElementById('lightboxComments');

	
	var arrayPageSize = getPageSize();
	var arrayPageScroll = getPageScroll();
	
	
	objComments.innerHTML = '';
	objImage.style.display = 'block';

	// center loadingImage if it exists
	if (objLoadingImage) {
		objLoadingImage.style.top = (arrayPageScroll[1] + ((arrayPageSize[3] - 35 - objLoadingImage.height) / 2) + 'px');
		objLoadingImage.style.left = (((arrayPageSize[0] - 20 - objLoadingImage.width) / 2) + 'px');
		objLoadingImage.style.display = 'block';
	}

	// set height of Overlay to take up whole page and show
	objOverlay.style.height = (arrayPageSize[1] + 'px');
	objOverlay.style.display = 'block';

	// preload image
	imgPreload = new Image();

	imgPreload.onload=function(){
		objImage.src = objLink.href;

		// center lightbox and make sure that the top and left values are not negative
		// and the image placed outside the viewport
		var lightboxTop = arrayPageScroll[1] + ((arrayPageSize[3] - 35 - imgPreload.height) / 2);
		var lightboxLeft = ((arrayPageSize[0] - 20 - imgPreload.width) / 2);
		
		objLightbox.style.top = (lightboxTop < 0) ? "0px" : lightboxTop + "px";
		objLightbox.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px";


		objLightboxDetails.style.width = imgPreload.width + 'px';
		objImage.width = imgPreload.width;
		objImage.height = imgPreload.height;
		
		if(objLink.getAttribute('title')){
			objCaption.style.display = 'block';
			//objCaption.style.width = imgPreload.width + 'px';
			objCaption.innerHTML = objLink.getAttribute('title');
		} else {
			objCaption.style.display = 'none';
		}
		
		// A small pause between the image loading and displaying is required with IE,
		// this prevents the previous image displaying for a short burst causing flicker.
		if (navigator.appVersion.indexOf("MSIE")!=-1){
			pause(250);
		} 

		if (objLoadingImage) {	objLoadingImage.style.display = 'none'; }

		// Hide select boxes as they will 'peek' through the image in IE
		selects = document.getElementsByTagName("select");
        for (i = 0; i != selects.length; i++) {
                selects[i].style.visibility = "hidden";
        }

	
		objLightbox.style.display = 'block';

		// After image is loaded, update the overlay height as the new image might have
		// increased the overall page height.
		arrayPageSize = getPageSize();
		objOverlay.style.height = (arrayPageSize[1] + 'px');
		
		var commentsWidth = parseInt(objLightboxDetails.style.width);
		
		if (commentsWidth < 500) {
			commntsWidth = 500;
		}
		
		objComments.style.width = (commentsWidth + 'px');
		
		// Check for 'x' keypress
		listenKey();

		return false;
	}

	imgPreload.src = objLink.href;
	
}


function showLightboxWithComments(objLink)
{	
	// prep objects
	var objOverlay = document.getElementById('overlay');
	var objLightbox = document.getElementById('lightbox');
	var objCaption = document.getElementById('lightboxCaption');
	var objImage = document.getElementById('lightboxImage');
	var objLoadingImage = document.getElementById('loadingImage');
	var objLightboxDetails = document.getElementById('lightboxDetails');
	var objComments = document.getElementById('lightboxComments');
	
	
	var arrayPageSize = getPageSize();
	var arrayPageScroll = getPageScroll();
	
	
	objComments.innerHTML = '';
	objImage.style.display = 'block';

	// center loadingImage if it exists
	if (objLoadingImage) {
		objLoadingImage.style.top = (arrayPageScroll[1] + ((arrayPageSize[3] - 35 - objLoadingImage.height) / 2) + 'px');
		objLoadingImage.style.left = (((arrayPageSize[0] - 20 - objLoadingImage.width) / 2) + 'px');
		objLoadingImage.style.display = 'block';
	}

	// set height of Overlay to take up whole page and show
	objOverlay.style.height = (arrayPageSize[1] + 'px');
	objOverlay.style.display = 'block';
	objComments.style.display = 'block';

	// preload image
	imgPreload = new Image();

	imgPreload.onload=function(){
		objImage.src = objLink.href;

		// center lightbox and make sure that the top and left values are not negative
		// and the image placed outside the viewport
		var lightboxTop = arrayPageScroll[1] + ((arrayPageSize[3] - 35 - imgPreload.height) / 2);
		var lightboxLeft = ((arrayPageSize[0] - 20 - imgPreload.width) / 2);
		
		objLightbox.style.top = (lightboxTop < 0) ? "0px" : lightboxTop + "px";
		objLightbox.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px";


		objLightboxDetails.style.width = imgPreload.width + 'px';
		objImage.width = imgPreload.width;
		objImage.height = imgPreload.height;
		
		if(objLink.getAttribute('title')){
			objCaption.style.display = 'block';
			//objCaption.style.width = imgPreload.width + 'px';
			objCaption.innerHTML = objLink.getAttribute('title');
		} else {
			objCaption.style.display = 'none';
		}
		
		// A small pause between the image loading and displaying is required with IE,
		// this prevents the previous image displaying for a short burst causing flicker.
		if (navigator.appVersion.indexOf("MSIE")!=-1){
			pause(250);
		} 

		if (objLoadingImage) {	objLoadingImage.style.display = 'none'; }

		// Hide select boxes as they will 'peek' through the image in IE
		selects = document.getElementsByTagName("select");
        for (i = 0; i != selects.length; i++) {
                selects[i].style.visibility = "hidden";
        }

		objLightbox.style.width = imgPreload.width;
		objLightbox.style.display = 'block';

		// After image is loaded, update the overlay height as the new image might have
		// increased the overall page height.
		arrayPageSize = getPageSize();
		objOverlay.style.height = (arrayPageSize[1] + 'px');
		
		/**
		 * Komentarze
		 */
		
		var commentsWidth = parseInt(objLightboxDetails.style.width);
		
		if (commentsWidth < 500) {
			commentsWidth = 500;
		}
		
		objLightboxDetails.style.width = (commentsWidth + 'px');
		objComments.style.width = (commentsWidth + 'px');
		objLightbox.style.width = (commentsWidth + 'px');
		
		advAJAX.post({
			url: (baseHref + 'ajax_komentarze.php'),
			imageHref : objLink.href,
			onSuccess : function(obj) {
				showCommentsButton(obj.responseText);
			}
		});
		
		
		
		// Check for 'x' keypress
		listenKey();
		
		return false;
	}

	imgPreload.src = objLink.href;
	
}


function showInfo(infoContent) {
	var objInfoBox = document.getElementById('infoBox');
	var objCommentsBox = document.getElementById('commentsBox');
	var objCommentsList = document.getElementById('commentsList');
	
	if (!objInfoBox) {
		objInfoBox = document.createElement('p');
		objInfoBox.setAttribute('id', 'infoBox');
	}
	
	objInfoBox.innerHTML = infoContent;
	
	if (!objCommentsList) {
		objCommentsBox.appendChild(objInfoBox);
	} else {
		objCommentsBox.insertBefore(objInfoBox, objCommentsList);
	}
}


function showCommentsButton(imageId) {
	if (imageId != '0' && imageId.match('^[0-9a-zA-Z.\-]+$')) {
		
		var objLightbox = document.getElementById('lightbox');
		
		var objButtonLink = document.createElement('a');
		objButtonLink.setAttribute('href', ('javascript:showComments(\'' + imageId + '\',1)') );
		objButtonLink.setAttribute('id', 'showCommentsButtonLink');
		objButtonLink.innerHTML = 'Pokaż komentarze';
		
		var objButtonHeader = document.getElementById('showCommentsButtonHeader');
		if (!objButtonHeader) {
			var objButtonHeader = document.createElement('p');
			objButtonHeader.setAttribute('id', 'showCommentsButtonHeader');
			objButtonHeader.style.width = objLightbox.style.width;
		} else {
			objButtonHeader.removeChild(objButtonHeader.firstChild);
		}
		objButtonHeader.appendChild(objButtonLink);
		
		var objComments = document.getElementById('lightboxComments');
		objComments.appendChild(objButtonHeader);
		
	}
}


function showComments(imageId, page) {
	var objButtonLink = document.getElementById('showCommentsButtonLink');
	var objComments = document.getElementById('lightboxComments');
	var objLightboxImage = document.getElementById('lightboxImage');
	var objCommentsBox = document.getElementById('commentsBox');
	
	//var newWidth = parseInt(objLightboxImage.width) / 4;
	//var newHeight = parseInt(objLightboxImage.height) / 4;
	//objLightboxImage.width = newWidth;
	//objLightboxImage.height = newHeight;
	objLightboxImage.style.display = 'none';
	
	objButtonLink.innerHTML = 'Ukryj komentarze';
	objButtonLink.setAttribute('href', ('javascript:hideComments(\'' + imageId + '\')'));
	
	if (!objCommentsBox) {
		objCommentsBox = document.createElement('div');
		objCommentsBox.setAttribute('id', 'commentsBox');
	}
	objCommentsBox.innerHTML = '<p>Trwa wczytywanie komentarzy...</p>';
	
	advAJAX.post({
		url: (baseHref + 'ajax_komentarze.php'),
		getComments: imageId,
		page: page,
		
		onSuccess: function(obj) {
			objCommentsBox.innerHTML = obj.responseText;
			//var objCommentContent = document.getElementById('commentContent');
			//objCommentContent.style.width = (parseInt(objComments.style.width) - 120) + 'px';
			
			var objCommentSubmit = document.getElementById('commentSubmit');
			if (objCommentSubmit) {
				objCommentSubmit.setAttribute('href', 'javascript:submitComment(\'' + imageId + '\')');
			}
			
			var objOverlay = document.getElementById('overlay');
			arrayPageSize = getPageSize();
			objOverlay.style.height = (arrayPageSize[1] + 'px');
		},
		
		onError : function(obj) {
			objCommentsBox.innerHTML = 'Błąd: ' + obj.status;
		}
	})
	
	objComments.appendChild(objCommentsBox);
}


function hideComments(imageId) {
	var objComments = document.getElementById('lightboxComments');
	var objLightboxImage = document.getElementById('lightboxImage');
	var objButtonLink = document.getElementById('showCommentsButtonLink');
	var objCommentsBox = document.getElementById('commentsBox');
	
	objComments.removeChild(objCommentsBox);
	objLightboxImage.style.display = 'block';
	objButtonLink.innerHTML = 'Pokaż komentarze';
	objButtonLink.setAttribute('href', ('javascript:showComments(\'' + imageId + '\',1)'));
	
	var objOverlay = document.getElementById('overlay');
	arrayPageSize = getPageSize();
	objOverlay.style.height = (arrayPageSize[1] + 'px');
}


function submitComment(imageId) {
	var objCommentsBox = document.getElementById('commentsBox');
	var objCommentContent = document.getElementById('commentContent');
	var objCommentSign = document.getElementById('uczestnikImie');
	var objNoComments = document.getElementById('noComments');
	var objCommentsList = document.getElementById('commentsList');
	
	if (commentSubmitButtonDisabled == false) {
		
		commentSubmitButtonDisabled = true;
		
		showInfo('Wysyłanie komentarza...');
		
		var commentSign = 0;
		if (objCommentSign) {
			commentSign = objCommentSign.value
		}
		
		advAJAX.post({
			url: (baseHref + 'ajax_komentarze.php'),
			submitComment: imageId,
			commentContent: objCommentContent.value,
			commentSign: commentSign,
			
			onSuccess: function(obj) {
				
				if (obj.responseText.replace(/^\s+|\s+$/g, '') != '100') {
					if (obj.responseText.replace(/^\s+|\s+$/g, '') != '101') {
						if (obj.responseText.replace(/^\s+|\s+$/g, '') != '102') {
							if (obj.responseText.replace(/^\s+|\s+$/g, '') != '103') {
						
								if (objNoComments) {
									objCommentsBox.removeChild(objNoComments);
								}
								
								if (!objCommentsList) {
									objCommentsList = document.createElement('ul');
									objCommentsList.setAttribute('id', 'commentsList');
									objCommentsBox.appendChild(objCommentsList);
								}
								
								var objNewComment = document.createElement('li');
								objNewComment.className = 'newComment';
								objNewComment.innerHTML = obj.responseText;
								
								if (!objCommentsList.firstChild) {
									objCommentsList.appendChild(objNewComment);
								} else {
									objCommentsList.insertBefore(objNewComment, objCommentsList.firstChild);
								}
								
								objCommentContent.value = '';
								showInfo('Komentarz wysłany!');
								
								var objOverlay = document.getElementById('overlay');
								arrayPageSize = getPageSize();
								objOverlay.style.height = (arrayPageSize[1] + 'px');
								
							} else {
								showInfo('Wybierz podpis dla komentarza');
							}
						} else {
							showInfo('Nie masz uprawnień do dodawania komentarzy');
						}
					} else {
						showInfo('Komentarz jest za długi (maks. 400 znaków)');
					}
				} else {
					showInfo('Musisz odczekać co najmniej minutę od wysłania ostatniego komentarza');
				}
				
				commentSubmitButtonDisabled = false;
				
			},
			
			onError : function(obj) {
				showInfo('Błąd: ' + obj.status);
				commentSubmitButtonDisabled = false;
			}
		});
		
	}
}


//
// hideLightbox()
//
function hideLightbox()
{
	// get objects
	objOverlay = document.getElementById('overlay');
	objLightbox = document.getElementById('lightbox');

	// hide lightbox and overlay
	objOverlay.style.display = 'none';
	objLightbox.style.display = 'none';

	// make select boxes visible
	selects = document.getElementsByTagName("select");
    for (i = 0; i != selects.length; i++) {
		selects[i].style.visibility = "visible";
	}

	// disable keypress listener
	document.onkeypress = '';
}




//
// initLightbox()
// Function runs on window load, going through link tags looking for rel="lightbox".
// These links receive onclick events that enable the lightbox display for their targets.
// The function also inserts html markup at the top of the page which will be used as a
// container for the overlay pattern and the inline image.
//
function initLightbox()
{
	
	if (!document.getElementsByTagName){ return; }
	var anchors = document.getElementsByTagName("a");
	var ajaxIncluded = false;

	// loop through all anchor tags
	for (var i=0; i<anchors.length; i++){
		var anchor = anchors[i];
		
		if (anchor.getAttribute("href") && (anchor.getAttribute("rel") == "lightbox")){
			anchor.onclick = function () {showLightbox(this); return false;}
		}
		
		if (anchor.getAttribute("href") && (anchor.getAttribute("rel") == "lightbox comments")){
			if (ajaxIncluded == false) {
				var htmlHead = document.getElementsByTagName('head').item(0);
				var ajaxScript = document.createElement('script');
			    ajaxScript.setAttribute('type', 'text/javascript');
			    ajaxScript.setAttribute('src', './js/advancedajax.js');
			    htmlHead.appendChild(ajaxScript);
			    ajaxIncluded = true;
			}
			anchor.onclick = function () {showLightboxWithComments(this); return false;}
		}
	}

	// the rest of this code inserts html at the top of the page that looks like this:
	//
	// <div id="overlay">
	//		<a href="#" onclick="hideLightbox(); return false;"><img id="loadingImage" /></a>
	//	</div>
	// <div id="lightbox">
	//		<a href="#" onclick="hideLightbox(); return false;" title="Click anywhere to close image">
	//			<img id="closeButton" />		
	//			<img id="lightboxImage" />
	//		</a>
	//		<div id="lightboxDetails">
	//			<div id="lightboxCaption"></div>
	//			<div id="keyboardMsg"></div>
	//		</div>
	//		<div id="lightboxComments">
	//		</div>
	// </div>
	
	var objBody = document.getElementsByTagName("body").item(0);
	
	// create overlay div and hardcode some functional styles (aesthetic styles are in CSS file)
	var objOverlay = document.createElement("div");
	objOverlay.setAttribute('id','overlay');
	objOverlay.onclick = function () {hideLightbox(); return false;}
	objOverlay.style.display = 'none';
	objOverlay.style.position = 'absolute';
	objOverlay.style.top = '0';
	objOverlay.style.left = '0';
	objOverlay.style.zIndex = '90';
 	objOverlay.style.width = '100%';
	objBody.insertBefore(objOverlay, objBody.firstChild);
	
	var arrayPageSize = getPageSize();
	var arrayPageScroll = getPageScroll();

	// preload and create loader image
	var imgPreloader = new Image();
	
	// if loader image found, create link to hide lightbox and create loadingimage
	imgPreloader.onload=function(){

		var objLoadingImageLink = document.createElement("a");
		objLoadingImageLink.setAttribute('href','#');
		objLoadingImageLink.onclick = function () {hideLightbox(); return false;}
		objOverlay.appendChild(objLoadingImageLink);
		
		var objLoadingImage = document.createElement("img");
		objLoadingImage.src = loadingImage;
		objLoadingImage.setAttribute('id','loadingImage');
		objLoadingImage.style.position = 'absolute';
		objLoadingImage.style.zIndex = '150';
		objLoadingImageLink.appendChild(objLoadingImage);

		imgPreloader.onload=function(){};	//	clear onLoad, as IE will flip out w/animated gifs

		return false;
	}

	imgPreloader.src = loadingImage;

	// create lightbox div, same note about styles as above
	var objLightbox = document.createElement("div");
	objLightbox.setAttribute('id','lightbox');
	objLightbox.style.display = 'none';
	objLightbox.style.position = 'absolute';
	objLightbox.style.zIndex = '100';	
	objBody.insertBefore(objLightbox, objOverlay.nextSibling);
	
	// create link
	var objLink = document.createElement("a");
	objLink.setAttribute('href','#');
	objLink.setAttribute('title','Click to close');
	objLink.onclick = function () {hideLightbox(); return false;}
	objLightbox.appendChild(objLink);

	// preload and create close button image
	var imgPreloadCloseButton = new Image();

	// if close button image found, 
	imgPreloadCloseButton.onload=function(){

		var objCloseButton = document.createElement("img");
		objCloseButton.src = closeButton;
		objCloseButton.setAttribute('id','closeButton');
		objCloseButton.style.position = 'absolute';
		objCloseButton.style.zIndex = '200';
		objLink.appendChild(objCloseButton);

		return false;
	}

	imgPreloadCloseButton.src = closeButton;

	// create image
	var objImage = document.createElement("img");
	objImage.setAttribute('id','lightboxImage');
	objLink.appendChild(objImage);
	
	// create details div, a container for the caption and keyboard message
	var objLightboxDetails = document.createElement("div");
	objLightboxDetails.setAttribute('id','lightboxDetails');
	objLightbox.appendChild(objLightboxDetails);

	// create caption
	var objCaption = document.createElement("div");
	objCaption.setAttribute('id','lightboxCaption');
	objCaption.style.display = 'none';
	objLightboxDetails.appendChild(objCaption);

	// create keyboard message
	var objKeyboardMsg = document.createElement("div");
	objKeyboardMsg.setAttribute('id','keyboardMsg');
	objKeyboardMsg.innerHTML = '<a href="#" onclick="hideLightbox(); return false;">kliknij aby zamknąć</a>';
	objLightboxDetails.appendChild(objKeyboardMsg);
	
	// create comments
	var objComments = document.createElement("div");
	objComments.setAttribute('id','lightboxComments');
	objLightbox.appendChild(objComments);


}




//
// addLoadEvent()
// Adds event to window.onload without overwriting currently assigned onload functions.
// Function found at Simon Willison's weblog - http://simon.incutio.com/
//
function addLoadEvent(func)
{	
	var oldonload = window.onload;
	if (typeof window.onload != 'function'){
    	window.onload = func;
	} else {
		window.onload = function(){
		oldonload();
		func();
		}
	}

}



addLoadEvent(initLightbox);	// run initLightbox onLoad