var request;
var mod_close="CloseModule";
var mod_minimize="MinimizeModule";
var mod_maximize="MaximizeModule";
var mod_swap="SwapModule";
var mod_subscription="SubscriptionModule";

function initXMLHttpRequest() {
    // branch for native XMLHttpRequest object
    if (window.XMLHttpRequest) {
        request = new XMLHttpRequest();
	}
    else if (window.ActiveXObject) {
        request = new ActiveXObject('Microsoft.XMLHTTP');
	}
	return(request);
}

function loadXMLDoc(url,request,handler) {
	request.onreadystatechange = handler;// assign handler. 
	request.open("GET", url, true);
	request.send(null);//null data for GET call
}

function ajax_handler() {
	processReqChange(request);
}

function processReqChange(request) {
	// only if req shows "complete"
    if (request.readyState == 4) {
        // only if "OK"
        if (request.status == 200) {
			parseResponseXML(request);
		} else {
			//alert('There was a problem retrieving content:\n' + request.statusText); // use only for debugging.
		}
	}
}

function displayBlock(module, moduleParam, contentID, catObj, result) {

	

	// If dropdown value was empty, exit immediately.
	if (module == mod_swap || module == mod_subscription) {
		if (moduleParam == "") {
			return;
		}
	}

	var hasJs = catObj.hasJs;
	if (module == mod_swap) {
		for (i=0; i < categoryList.length;i++) {
			if (moduleParam == categoryList[i].catId) {
				hasJs = categoryList[i].isJavascript;
				break;
			}
		}
	}

	var useAjax = (config_ajax == "AJAX" ? true : false);
	var useIframe = (config_ajax == "IFRAME" ? true : false);
	if (config_ajax == "AJAX_IFRAME") {
		useAjax = true;
		if (hasJs == "true") {
			useIframe = true;
			useAjax = false;
		}
	}

	if (allow_override == 'yes') {
		useAjax = (page_config_ajax == "AJAX" ? true : false);
		useIframe = (page_config_ajax == "IFRAME" ? true : false);
		if (page_config_ajax == "AJAX_IFRAME") {
			useAjax = true;
			if (hasJs == "true") {
				useIframe = true;
				useAjax = false;
			}
		}
	}

	var color = getColorForScheme(catObj.scheme);
	var refresh = ((module == mod_minimize || module == mod_close) ? "n" : "y");
			 
	var url = "/personalization/AjaxController.jsp?contentID="+contentID+"&module="+module+"&categoryID="+catObj.id+"&subscriptionID="+contentarea[contentID]+"&selectedID="+moduleParam+"&refresh="+refresh+"&scheme="+catObj.scheme;
	var toolsHTML = document.getElementById("tools_"+contentID).innerHTML;

	if (module == mod_minimize) {
		if (useAjax || useIframe) {
			insertContent(contentID,''); // insert empty content
			// display icon
			toolsHTML = toolsHTML.replace(/min/g,'max');
			toolsHTML = toolsHTML.replace(/MinimizeModule/g,'MaximizeModule');
			//toolsHTML = toolsHTML.replace(/Minimise/g,'Maximise');
			toolsHTML = toolsHTML.replace(alt_texts["min"],alt_texts["max"]);
		}
		document.getElementById("tools_"+contentID).innerHTML=toolsHTML;
	}
	else if (module == mod_close) {
		for (i=0; i < categoryList.length; i++ ) {
			if (catObj.id == categoryList[i].catId) {
				categoryList[i].flag = "0";
				break;
			}
		}
		if (useAjax || useIframe) {
			document.getElementById("portlet_"+contentID).style.display ='none';
		}
	}
	else if (module == mod_subscription) {
		var listElements = catObj.list.split("."); 
		var listName = listElements[1];

		i = 0;
		while ( i < categoryList.length ) {
			var slpCatId = categoryList[i].slpCatId;
			var catId = categoryList[i].catId;
			if (catId == catObj.id) {
				url += "&twinCategoryID=" + slpCatId;
				break;
			}
			i++;
		}
	}
	document.getElementById("tools_"+contentID).innerHTML=toolsHTML;

	if (useIframe) {
		// Super duper Iframe way
		if(module != mod_minimize) {
			insertContent(contentID,text_loading);
		}

		url += "&useIframe=true";

		var oDiv = document.createElement('div');
		oDiv.setAttribute("id",'hiddendiv_'+contentID);
		oDiv.style.width = '1px';oDiv.style.height = '1px';oDiv.style.visibility = 'hidden';oDiv.style.top = '0px';
		oDiv.style.left = '0px';oDiv.style.position = 'absolute';

		document.body.appendChild(oDiv);
		oDiv.innerHTML = "<iframe id='"+contentID+"' name='"+contentID+"' height='1' width='1'></iframe>";
		loadIframe(contentID,url);//TODO: will content get auto replaced?
	}
	else if (useAjax) {
		// Cool ajax way
		if(module != mod_minimize) {	
			insertContent(contentID, text_loading);
		}
		request = initXMLHttpRequest();
		loadXMLDoc(url,request,ajax_handler);
	}
	else {
		// Traditional PB way
		var subscriptionID = contentarea[contentID];
		if (module == mod_minimize) {
			url = servletURL + "?module=com.med.phd.CustomizeProfileModule&action=minimizeSubscription&subscriptionID="+subscriptionID;
		}
		else if (module == mod_maximize) {
			url = servletURL + "?module=com.med.phd.CustomizeProfileModule&action=maximizeSubscription&subscriptionID="+subscriptionID;
		}
		else if (module == mod_close) {
			url = servletURL + "?module=com.med.phd.CustomizeProfileModule&action=cancelSubscription&subscriptionID="+subscriptionID;
		}
		else if (module == mod_swap) {
			url += "&reload=y&pageURL="+servletURL;
		}
		else if (module == mod_subscription) {
			url += "&reload=y&pageURL="+servletURL;
		}
		window.location = url;
		return false;
	}
}

function insertContent(contentID,content) {
	document.getElementById("portlet_content_"+contentID).innerHTML = "<div class=\"portlet_content_left_shadow\"><div class=\"portlet_content_margin\"></div><div class=\"portlet_inner_content\">" + content + "</div><div class=\"portlet_content_margin\"></div>";
}

function parseResponseXML(request) {
	if(request.responseXML != null) {
		var response = request.responseXML.documentElement;
		var error = response.getAttribute("isError");
		var contentID = response.getElementsByTagName("contentID")[0].childNodes[0].nodeValue;
		var body = response.getElementsByTagName('body')[0].firstChild.data;
		var catID = response.getElementsByTagName('id')[0].firstChild.data;	
		
		if(error == 'yes') {
			insertContent(contentID,body);
		}
		else {
			var title = '';
			if (response.getElementsByTagName('title')[0].firstChild != null) {
				title = response.getElementsByTagName('title')[0].firstChild.data;
			}
			var module = '';
			if (response.getElementsByTagName('module')[0].firstChild != null) {
				module = response.getElementsByTagName('module')[0].firstChild.data;
			}
			var close = '';
			if (response.getElementsByTagName('close')[0].firstChild != null) {
				close = response.getElementsByTagName('close')[0].firstChild.data;
			}
			var minimize = '';
			if (response.getElementsByTagName('minimize')[0].firstChild != null) {
				minimize = response.getElementsByTagName('minimize')[0].firstChild.data;
			}
			var subscriptionID = '';
			if (response.getElementsByTagName('subscriptionID')[0].firstChild != null) {
				subscriptionID = response.getElementsByTagName('subscriptionID')[0].firstChild.data;
			}
			var selectedID = '';
			if(response.getElementsByTagName('selectedID')[0].firstChild != null) {
				selectedID = response.getElementsByTagName('selectedID')[0].firstChild.data;
			}
			if (module == mod_maximize) {
				dd = document.getElementById('select_'+contentID);
				if (dd != null && dd !='') {
					selectedID = dd.value;
				}
			}

			var hasJs = '';
			if (response.getElementsByTagName('useIframe')[0].firstChild != null) {
				hasJs = response.getElementsByTagName('useIframe')[0].firstChild.data;
			}
			var scheme = '';
			if (response.getElementsByTagName('scheme')[0].firstChild != null) {
				scheme = response.getElementsByTagName('scheme')[0].firstChild.data;
			}
			var catListType = '';
			if (response.getElementsByTagName('catlist')[0].firstChild != null) {
				catListType = response.getElementsByTagName('catlist')[0].firstChild.data;
			}
			// If not minimized and not closed
			if(module!=mod_close && module!=mod_minimize) {

				contentarea[contentID] = subscriptionID;
				insertContent(contentID,body);
				
				var catFromResponse = new catObject(catID,title,minimize,'',close,'',catListType,scheme,hasJs);
				update_container_header(contentID,selectedID,catFromResponse,scheme);
			}
		}
	}
}

function loadIframe(iframeName, url) {
	if ( window.frames[iframeName] ) {
		window.frames[iframeName].location = url;   
		return false;
	}
	else {	
		return true;
	}
}

function insertIt( module, selectedID, contentID, subscriptionID, catObj, scheme) {
	if(module != mod_close && module != mod_minimize) {
		var _y = document.getElementById('portlet_content_'+contentID);
		var  _x = window.frames[contentID].document.body;	
		
		contentarea[contentID] = subscriptionID;
		if (module == mod_maximize) {
			dd = document.getElementById('select_'+contentID);
			if (dd != null && dd !='') {
				selectedID = dd.value;
			}
		}
		_y.innerHTML = "<div class=\"portlet_content_left_shadow\"><div class=\"portlet_content_margin\"></div><div class=\"portlet_inner_content\">" + _x.innerHTML + "</div><div class=\"portlet_content_margin\"></div>";
		update_container_header(contentID, selectedID, catObj, catObj.scheme);
	}
	
}

function insertItError( module, selectedID, contentID, subscriptionID, catObj, scheme) {
		var _y = document.getElementById('portlet_content_'+contentID);
		var  _x = window.frames[contentID].document.body;	

		contentarea[contentID] = subscriptionID;
		if (module == mod_maximize) {
			dd = document.getElementById('select_'+contentID);
			if (dd != null && dd !='') {
				selectedID = dd.value;
			}
		}
		_y.innerHTML = "<div class=\"portlet_content_left_shadow\"><div class=\"portlet_content_margin\"></div><div class=\"portlet_inner_content\">" + _x.innerHTML + "</div><div class=\"portlet_content_margin\"></div>";
}