var LANG='';
var totalPage = 0;
// holds an instances of XMLHttpRequest
//var xhrObjects = new Array();

// variables that establish how often to access the server 
var updateInterval = 5; // how many seconds to wait to get new message
var errorRetryInterval = 30; // seconds to wait after server error
// when set to true, display detailed error messages
var debugMode = false;
var errorRetryInterval = 30; // seconds to wait after server error

function debug(text) {if (debugMode) alert(text);} 

function loading(objectName){document.getElementById(objectName).innerHTML = "<img src='/images/indicator_remembermilk_orange.gif' alt='Chargement en cours'  />Veuillez patienter...";}


// function that displays a new message on the page
function display(objectName, message){ myDiv = document.getElementById(objectName); myDiv.innerHTML = message + "<br/>";}

// function that displays an error message
function displayError($message, objectName){
  // display error message, with more technical details if debugMode is true
  display(objectName, "Error retrieving the news message! Will retry in " +
          errorRetryInterval + " seconds." + 
          (debugMode ? "<br/>" + $message : ""));
  // restart sequence 
//  setTimeout("process();", errorRetryInterval * 1000);
}

// call server asynchronously
function loadXMLDoc(requestType,url,objectName,selectedValue,reqPage){
	var xhr = null; 	
	// var rnd = Math.random();
	  var completeUrl ='/nav.php/XML/type/'+requestType;
	  if(url> '') completeUrl = completeUrl+"/"+url;
		// urlString = completeUrl
		// +'/rnd/'+rnd;
$.ajax({ 
	async : true
	,type: "GET"
	,url: completeUrl
	,dataType: "xml"
//	,before:loading(objectName)
	,success: function(xmlData){handleResponse(xmlData,requestType,url,objectName,selectedValue,reqPage);}
})

}

function handleResponse(xml,requestType,url,objectName,selectedValue,reqPage){
	switch (requestType){
		case "genre": 
		case "topGenre":
			wGenre(xml,objectName);
		break;
		case "album": wAlbums(xml,objectName, requestType,reqPage,url); break;
		case "albumDetail": wAlbumDetail(xml,objectName); break;
		case "single": loading(objectName);wSingle(xml,objectName, requestType,reqPage,url); break;
		case "singleList": wSingleList(xml,objectName, requestType,reqPage,url); break;
		case "genre": wGenre(xml,objectName); break;
		case "genreArtist": wGenreArtist(xml,objectName); break;
		case "albumArtistList": wAlbumArtistList(xml,objectName,requestType,selectedValue,reqPage, url); break;
		case "optionArtistList": wOptionArtistList(xml,objectName,requestType,selectedValue,reqPage, url); break;
		case "singleArtistList": wSingleArtistList(xml,objectName,requestType,selectedValue,reqPage, url); break;
		case "fileArtistList": wFileArtistList(xml,objectName,requestType,selectedValue,reqPage, url); break;
		case "imageArtistList": wImageArtistList(xml,objectName,requestType,selectedValue,reqPage, url); break;
		case "artist": wArtistDetail(xml,objectName); break;
		case "newsList": wNews(xml,objectName,requestType,selectedValue,reqPage, url); break;
		case "statsArtist": wArtistStats(xml,objectName,requestType,selectedValue,reqPage, url); break;
		case "search" :
		case "newItem":
			wSearchResult(xml,objectName,requestType,selectedValue,reqPage, url); 
		break;
	}
}

function loadXMLForm(requestType,objectName,url,selectedValue,divID){
	var xhr = null; 	
	// var rnd = Math.random();
	  var completeUrl ='/nav.php/XML/type/'+objectName;
	  if(url> '') completeUrl = completeUrl+"/"+url;
$.ajax({ 
	async : true
	,type: "GET"
	,url: completeUrl
	,dataType: "xml"
//	,before:loading(objectName)
	,success: function(xmlData){generateFormEntries(xmlData,requestType,objectName,selectedValue,divID);}
//	,complete:bindBehaviors()
})

}

function generateFormEntries(xml,requestType,objectName,selectedValue,divID){
	switch (requestType){
		case "formSelect": buildSelectForm(xml,objectName,selectedValue,divID); break;
		case "formCheckBox": buildCheckBoxes(xml,objectName,selectedValue,true);  break;
		case "formCheckBoxSingle": buildCheckBoxes(xml,objectName,selectedValue,false);  break;
		case "formRadio": buildRadio(xml,objectName,selectedValue,divID);  break;
	}
}

// empty a select list content
function clearSelectList(objectName) {
	try{
		var select=eval('document.forms[0].'+ objectName); // define witch object to work with
    while (select.length > 0) select.remove(0); //delete each line of the current select
	}
	catch(e){ if(debugMode==1)  alert('Clear list error=> ' + e);	window.status= "Error (5) Unable to build select";}
}

function buildSelectForm(xml, objectName,selectedValue,divID) {
// alert ("BUILKD SELECT=> object="+objectName + " / size =>"+$("item",xml).length+"selected value=>"+selectedValue);
	$("#"+objectName).empty();
	if($("item",xml).length>0){
		$("#"+objectName).addOption('', '', false);
		$("//items/item", xml).each(function(){
			if($('id', this).text()==selectedValue) $("#"+objectName).addOption($('id', this).text(), $('description', this).text(), true);
			else $("#"+objectName).addOption($('id', this).text(), $('description', this).text(), false);
		});
	}
	else $("#"+objectName).empty().attr('disable');
}

function buildCheckBoxes(xml,objectName,selectedValue,array) {
// alert ("inside buicjeck");
  if($("item",xml).length>0){
		var output= "";
		$("//items/item", xml).each(function(){
		//alert ("singl==>"+single);
//		<label for='" + objectName +"'></label>
			output+="<br><input type='checkbox'";
			if(array ==true) output+="name='"+objectName+"[]'"; else output+= "name='" + objectName + "'";
			output+=" value='" + $('id', this).text()  + "' />"
						+ $('description', this).text()+""; 
		});
	  $("#"+objectName).empty().append(output);
	}
}
function buildRadio(xml,objectName,selectedValue,divID) {
  if($("item",xml).length>0){
		var output='';
		$("//items/item", xml).each(function(){
			output+="<input type='radio' name= '"+objectName+"' value='" + $('id', this).text()+"'";
			if($('id', this).text()==selectedValue) output+=" checked='checked'";
			output+="  />" +$('description', this).text()+"<br>"; 
		});
	  $("#"+divID).empty().append(output);
	  bindBehaviors();
	}
}

// Writting a list of news
function wNews(xml,divID, requestType,selectedValue,reqPage, url) {
nbPerPage=_NB_NEWS_PER_PAGE;
	var nbItem = $("item",xml).length; var output=''; var detail='';
    if(nbItem>0){
			output+="<h2>L'actualité</h2>";
			if(nbItem > nbPerPage){ // Handling pagination
				if (reqPage==undefined || reqPage==null ) reqPage=1; //Define a default page is not defined
				firstItem = (reqPage * nbPerPage) - nbPerPage	//Calculating the first item to display
				lastItem = firstItem + nbPerPage;  if (lastItem >nbItem) lastItem=nbItem;
			}else { firstItem=0;lastItem =nbItem; }
	    for (var i = firstItem; i < lastItem; i++) {
	    	$("//items/item", xml).eq(i).each(function(i){
					if ( $('url', this).text()>'') website="<br>Plus d'information: <a href='"+ $('url', this).text()+"' target='_blank'>"+$('url', this).text();
					else 		website="";	
					output+="<li><a href='/nav.php/news/id/" +$('id', this).text() + "/SID/e8b9ce5363d2106c0eb2979d5df3125a'>"+$('title', this).text() +"</a></li>";
					if($('id', this).text()== selectedValue){
						detail= "<br><strong>"+$('title', this).text()+"</strong><br>"+$('description', this).text()+website;
					}
	    	});
    	}
			if(nbItem > nbPerPage){ output +=pagination (nbItem,reqPage, requestType,divID,url);}
			$("#"+divID).empty().append(output+detail);
	  }
	  else{
	  if(divID=='announceList') $("#"+divID).empty().append('Aucun élément trouvé pour le moment');
 		}
}

// Writting a list of news
function wNews_backup(xhr,divID, requestType,selectedValue,reqPage, url) {
nbPerPage=_NB_NEWS_PER_PAGE; 
	try{
    	var req = xhr.responseXML.documentElement;   var website='';   	nbItem=req.getElementsByTagName("item").length; // nb items
    	if(req.getElementsByTagName("items").length>0) {items = req.getElementsByTagName("item");}
			var doc = document.getElementById(divID); var output='';
    	if(nbItem>0){
				if(nbItem > nbPerPage){ 
					if (reqPage==undefined || reqPage==null ) reqPage=1; //Define a default page is not defined
					firstItem = (reqPage * nbPerPage) - nbPerPage	//Calculating the first item to display
					lastItem = firstItem + nbPerPage;  if (lastItem >nbItem) lastItem=nbItem;
				}else { firstItem=0;lastItem =nbItem; }
				output+="<h2>Les news</h2>";
	    	for (var i = firstItem; i < lastItem; i++) {
					if (arrayVal(items[i], "url")>'') website="<br>Plus d'information: <a href='"+ arrayVal(items[i], "url")+"' target='_blank'>"+arrayVal(items[i], "url");
					else 		website="";	
	    	
					if(arrayVal(items[i], "id") == selectedValue){
						document.getElementById('newsDetail').innerHTML="<br><strong>"+arrayVal(items[i], "title")+"</strong>"
						+"<br>"+arrayVal(items[i], "description")
						+website;
					}
					output+="<li><a href='/nav.php/news/id/" +arrayVal(items[i], "id") + "/SID/e8b9ce5363d2106c0eb2979d5df3125a'>"
								+arrayVal(items[i], "title") +"</a></li>";
	      }
				if(nbItem > nbPerPage){ // Displaying the number of page
					output+=pagination (nbItem,reqPage, requestType,divID,url);
				}
				doc.innerHTML = output ;
	    }
  }
	catch(e){
		//if(debugMode==1) alert('writeNews2 =>' + e); window.status= "Error (4) Unable to read Node / " + xhr.readyState +" /"+xhr.status;
	}
}

//function arrayVal()
function arrayVal(obj,tag){
	var element = obj.getElementsByTagName(tag)[0];	if (element.hasChildNodes()) {return unescape (element.firstChild.nodeValue);} else return ''; 
}

// Return am XML node value
function getNodeValue(req,tagName, index){
//alert ('tag name=>'+tagName);
var element = req.getElementsByTagName(tagName)[index]; if (element.hasChildNodes()) {	txt =  nl2br(unescape (element.firstChild.nodeValue)); }  else txt = ''; return txt;}

// This function replace all \n char by a HTML BR
function nl2br(myString) {return myString.replace(/\n/g,'<br />');}

//pagination (nbItem,reqPage, requestType,objectName,url);
function pagination(totalItem,reqPage,requestType,divID,url ){
	if (( reqPage > 0) && (reqPage != 'ALL') ) firstItem = reqPage;
  if (divIsInt(totalItem, nbPerPage) > 0)  totalPage = divFloor(totalItem, nbPerPage) +1;
  else totalPage = divFloor(totalItem, nbPerPage);
 	var txt = "<div id='pagination'>";
//	var txt = "<div id='pagination'> Page : ";
	if (reqPage>1 ) txt= txt + " <a href='javascript:void(0)' onClick=\"loadXMLDoc('"+requestType +"','"+url+"','"+divID+"','',"+(reqPage-1)+");\">&laquo; Précédent</a> ";
	if (reqPage<totalPage ) txt = txt + " <a href='javascript:void(0)' onClick=\"loadXMLDoc('"+requestType +"','"+url+"','"+divID+"','',"+(reqPage+1)+");\">&raquo; Suivant</a> ";
	for(i = 1;i <= totalPage;i ++) {
		if(reqPage == i ) txt = txt+ ' - '+i;
//		if( i>1) txt = txt+ ' -'+i;
		else{txt= txt + "- <a href='javascript:void(0)' onClick=\"loadXMLDoc('"+requestType +"','"+url+"','"+divID+"','',"+i+");\">"+i+"</a> ";}
  }
	txt = txt +"</div>";
	return(txt);
}
// Indicate if the division result is 
function divIsInt(total, n) { return (total - (Math.floor(total / n)*n));}

// The function use the FLOOR() method, to return a number rounded DOWNWARDS to the nearest integer.
function divFloor(total, n) { return Math.floor(total /n);}


// call server asynchronously
function loadTXTDoc(requestType,url,objectName){
	var xhr = null; 	
	// var rnd = Math.random();
	  var completeUrl ='/nav.php/XML/type/'+requestType;
	  if(url> '') completeUrl = completeUrl+"/"+url;
		// urlString = completeUrl
		// +'/rnd/'+rnd;
$.ajax({ 
	async : true
	,type: "GET"
	,url: completeUrl
	,dataType: "xml"
	,before:loading(objectName)
	,success: function(xmlData){handleResponse(xmlData,requestType,url,objectName,selectedValue,reqPage);}
})

}

function getAds(zoneID, divID){}


// function called when the state of the HTTP request changes
function handleGettingNews() 
{
  // when readyState is 4, we are ready to read the server response
  if (xhr.readyState == 4) 
  {
    // continue only if HTTP status is "OK"
    if (xhr.status == 200) 
    {
      try
      {
        // do something with the response from the server
        getNews();
      }
      catch(e)
      {
        // display error message
        displayError(e.toString());
      }
    } 
    else
    {
      // display error message
      displayError(xhr.statusText);   
    }
  }
}

// handles the response received from the server
function getNews()
{
  // retrieve the server's response 
  var response = xhr.responseText;
  // server error?
  if (response.indexOf("ERRNO") >= 0 
      || response.indexOf("error") >= 0
      || response.length == 0)
    throw(response.length == 0 ? "Server error." : response);
  // display the message
  display(response);
  // restart sequence
//  setTimeout("process();", updateInterval * 1000);
}