var upload_range = 1;                                    
var total_upload_size;
var get_status_speed;
var get_status_url;
var get_data_loop = true;
var seconds = 0;
var minutes = 0;
var hours = 0;
var info_width = 0;
var info_bytes = 0;
var info_time_width = 400;
var info_time_bytes = 15;
var cedric_hold = true;

function checkFileNameFormat(){
	if(check_file_name_format == false){ return false; }
	
	for(var i = 0; i < upload_range; i++){
  		if(document.form_upload.elements['upfile_' + i].value != ""){
  			var string = document.form_upload.elements['upfile_' + i].value;
			var num_of_last_slash = string.lastIndexOf("\\");

			if(num_of_last_slash < 1){ num_of_last_slash = string.lastIndexOf("/"); }

			var file_name = string.slice(num_of_last_slash + 1, string.length);
			var re = /^[\w][\w\.\-]{1,32}$/i;   
				
			if(!re.test(file_name)){	
  				alert("Il caricamento di files con questo tipo di nome non è permesso. Assicurati che i nomi dei file che vuoi caricare seguano questo formato:\n\n1. Il nome del file non deve superare i 32 caratteri, il formato deve essere nome_file.estensione oppure nome_file e non deve contenere spazi.\n\n2. I caratteri permessi sono solamente i seguenti: numeri da 1 a 9, lettere minuscole a-z, lettere maiuscole A-Z,  '_',  '-'\n");
                //Sorry, uploading files in this format is not allowed. Please ensure your file names follow this format. \n\n1. Entire file cannot exceed 32 characters\n2. Format should be filename.extension or filename\n3. Legal characters are 1-9, a-z, A-Z, '_', '-'\n
  				return true;
  			}
  		}
  	}
	return false;
}

function checkDisallowFileExtensions(){
	if(check_disallow_extensions == false){ return false; }
  	
  	for(var i = 0; i < upload_range; i++){
  		if(document.form_upload.elements['upfile_' + i].value != ""){
  			if(document.form_upload.elements['upfile_' + i].value.match(disallow_extensions)){
  				var string = document.form_upload.elements['upfile_' + i].value;
				var num_of_last_slash = string.lastIndexOf("\\");

				if(num_of_last_slash < 1){ num_of_last_slash = string.lastIndexOf("/"); }

				var file_name = string.slice(num_of_last_slash + 1, string.length);
				var file_extension = file_name.slice(file_name.indexOf(".")).toLowerCase(); 
  				
  				alert('Il caricamento di file con estensione "' + file_extension + '" non è permesso.');
  				return true;
  			}
  		}
  	}
	return false;
}

function checkAllowFileExtensions(){
	if(check_allow_extensions == false){ return false; }
	
  	for(var i = 0; i < upload_range; i++){
  		if(document.form_upload.elements['upfile_' + i].value != ""){
  			if(!document.form_upload.elements['upfile_' + i].value.match(allow_extensions)){
  				var string = document.form_upload.elements['upfile_' + i].value;
				var num_of_last_slash = string.lastIndexOf("\\");

				if(num_of_last_slash < 1){ num_of_last_slash = string.lastIndexOf("/"); }

				var file_name = string.slice(num_of_last_slash + 1, string.length);
				var file_extension = file_name.slice(file_name.indexOf(".")).toLowerCase(); 
  				
  				alert('Il caricamento di file con estensione "' + file_extension + '" non è permesso.');
  				return true;
  			}
  		}
  	}
	return false;
}

function checkNullFileCount(){
  	if(check_null_file_count == false){ return false; }
  	
  	var null_file_count = 0;
  	
  	for(var i = 0; i < upload_range; i++){
  		if(document.form_upload.elements['upfile_' + i].value == ""){ null_file_count++; }
  	}
  	
  	if(null_file_count == upload_range){
		alert("Please Choose A File To Upload.");
		return true;
  	}
  	else{ return false; }
}

function checkDuplicateFileCount(){
	if(check_duplicate_file_count == false){ return false; }
  	
	var duplicate_flag = false;
	var file_count = 0;
	var duplicate_msg = "Tentativo di caricamento duplicato di files.\n\n";
	var file_name_array = new Array();
        
	for(var i = 0; i < upload_range; i++){
		if(document.form_upload.elements['upfile_' + i].value != ""){
  			var string = document.form_upload.elements['upfile_' + i].value;
			var num_of_last_slash = string.lastIndexOf("\\");

			if(num_of_last_slash < 1){ num_of_last_slash = string.lastIndexOf("/"); }

			var file_name = string.slice(num_of_last_slash + 1, string.length);
			            
			file_name_array[i] = file_name;
  		}
  	}
  	
  	var num_files = file_name_array.length;
       
	for(var i = 0; i < num_files; i++){
		for(var j = 0; j < num_files; j++){
			if(file_name_array[i] == file_name_array[j] && file_name_array[i] != null){ file_count++; }
		}
		if(file_count > 1){
			duplicate_msg += 'Duplicate file "' + file_name_array[i] + '" detected in slot ' + (i + 1) + ".\n";
			duplicate_flag = true;
		}
		file_count = 0;
	}
       
	if(duplicate_flag){ 
		alert(duplicate_msg);
		return true; 
	}
	else{ return false; }
}

function uploadFiles(){
	if(checkFileNameFormat()){ return false; }
	if(checkDisallowFileExtensions()){ return false; }
	if(checkAllowFileExtensions()){ return false; }
	if(checkNullFileCount()){ return false; }
	if(checkDuplicateFileCount()){ return false; }
	
	var total_uploads = 0;
	
	for(var i = 0; i < upload_range; i++){
		if(document.form_upload.elements['upfile_' + i].value != ""){ total_uploads++; }
	}
	
	document.getElementById('total_uploads').innerHTML = total_uploads;
	document.form_upload.upload_range.value = upload_range;
	document.form_upload.submit();
	document.getElementById('upload_button').disabled = true;
	
	iniProgressRequest();
	getElapsedTime();
	
	for(var i = 0; i < upload_range; i++){ document.form_upload.elements['upfile_' + i].disabled = true; }	
}

function uploadFiles2(){
	if(checkFileNameFormat()){ return false; }
	if(checkDisallowFileExtensions()){ return false; }
	if(checkAllowFileExtensions()){ return false; }
	if(checkNullFileCount()){ return false; }
	if(checkDuplicateFileCount()){ return false; }
	
	var total_uploads = 0;
	
	for(var i = 0; i < upload_range; i++){
		if(document.form_upload.elements['upfile_' + i].value != ""){ total_uploads++; }
	}
	
	document.getElementById('total_uploads').innerHTML = total_uploads;
	document.form_upload.upload_range.value = upload_range;
	//document.form_upload.submit();
	$('#fase-tre').append('<iframe id="uu_iframe_form" src="" width="0" height="0"></iframe>');
	$('#uu_iframe_form').append($('#form_upload'));
	document.getElementById('uu_iframe_form').getElementById('form_upload').submit();
	//document.getElementById('upload_button').disabled = true;
	
	iniProgressRequest();
	getElapsedTime();
	
	//for(var i = 0; i < upload_range; i++){ document.form_upload.elements['upfile_' + i].disabled = true; }	
}
 
function resetForm(){ top.location.href = self.location; }

function iniFilePage(){
	for(var i = 0; i < upload_range; i++){ 
		document.form_upload.elements['upfile_' + i].disabled = false;
		document.form_upload.elements['upfile_' + i].value = ""; 
	}
	
	document.getElementById('progress_info').innerHTML = "";
	document.getElementById('upload_button').disabled = false;
	document.getElementById('progress_bar').style.display = "none";
	document.form_upload.reset();
}


function stopUpload(){
	try{ window.stop(); }
	catch(e){
		try{ document.execCommand('Stop'); }
		catch(e){} 
	}
}

function addUploadSlot(num){
	if(upload_range < max_upload_slots){
		if(num == upload_range){
			var up = document.getElementById('upload_slots');
			var dv = document.createElement("div");
			
			dv.innerHTML = '<input type="file" name="upfile_' + upload_range + '" size="90" onchange="addUploadSlot('+(upload_range + 1)+')">';
			up.appendChild(dv);
			upload_range++;
			document.form_upload.upload_range.value = upload_range;
		}
	}
}

function smoothCedricStatus(){
	if(info_width < progress_bar_width && !cedric_hold){
		info_width = info_width + 1;
		document.getElementById('upload_status').style.width = info_width + 'px';
	}
	
	if(get_data_loop){ self.setTimeout("smoothCedricStatus()", info_time_width); }
}

function smoothCedricBytes(){
	if(info_bytes < total_upload_size && !cedric_hold){
		info_bytes = info_bytes + 1;
		document.getElementById('current').innerHTML = info_bytes;
	}
	
	if(get_data_loop){ self.setTimeout("smoothCedricBytes()", info_time_bytes); }
}

function updateCedricStatus(stats, bytes){
	// var deviant_stat = stats + 20; //Add 5% deviation
	
	// if(deviant_stat < info_width){ cedric_hold = true; }
	// else{
	// 	cedric_hold = false;
	//	info_width = stats;
	//	info_bytes = bytes;
	// }

	cedric_hold = false;
	info_width = stats;
	info_bytes = bytes;	
}

function getProgressStatus(){
	var jsel = document.createElement('SCRIPT');
	
	jsel.type = 'text/javascript';
	jsel.src = get_status_url + "&rnd_id=" + Math.random();
	
	document.body.appendChild(jsel);
	
	if(get_data_loop){ self.setTimeout("getProgressStatus()", get_status_speed); }
}

function getElapsedTime(){
	seconds += 1;
    	
    	if(seconds == 60){
    		seconds = 0;
    		minutes += 1;
    	}
    	
    	if(minutes == 60){
    		minutes = 0;
    		hours += 1;
    	}
    	
    	var hr = "" + ((hours < 10) ? "0" : "") + hours;
    	var min = "" + ((minutes < 10) ? "0" : "") + minutes;
    	var sec = "" + ((seconds < 10) ? "0" : "") + seconds;
    	
    	document.getElementById('time').innerHTML = hr + ":" + min + ":" + sec;
    	
    	if(get_data_loop){ self.setTimeout("getElapsedTime()", 1000); }
}

function createRequestObject(){
	var req = false;
  	
	if(window.XMLHttpRequest){
		req = new XMLHttpRequest();
		
		if(req.overrideMimeType){ req.overrideMimeType('text/xml'); }
	} 
	else if(window.ActiveXObject){
		try{ req = new ActiveXObject("Msxml2.XMLHTTP"); }
		catch(e){
			try{ req = new ActiveXObject("Microsoft.XMLHTTP"); }
			catch(e){}
		}
	}
	
	if(!req){
		document.getElementById('progress_info').innerHTML = "Errore: Il tuo browser non supporta AJAX";
		return false;
	}
	else{ return req; }	
}

function iniProgressRequest(){
	var req = false;
	req = createRequestObject();
	
	if(req){
		document.getElementById('progress_info').innerHTML = "Inizializzazione barra di progresso";
		req.open("GET", path_to_ini_status_script + "&rnd_id=" + Math.random(), true);
		req.onreadystatechange = function(){ iniProgressResponse(req); }; 
		req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); 
		req.send(null);
	}
}

function iniProgressResponse(req){
	if(req.readyState == 4){
		if(req.status == 200){
			var xml = req.responseXML;
			
			if(xml.getElementsByTagName('error_status').item(0).firstChild.nodeValue == 1){
				document.getElementById('progress_info').innerHTML = xml.getElementsByTagName('error_msg').item(0).firstChild.nodeValue;
				
				if(xml.getElementsByTagName('stop_upload').item(0).firstChild.nodeValue == 1){ stopUpload(); }
			}
			else{
				get_status_speed = xml.getElementsByTagName('get_data_speed').item(0).firstChild.nodeValue;
				get_status_url = "uu_get_status.php?temp_dir_sid=" + xml.getElementsByTagName('temp_dir').item(0).firstChild.nodeValue + tmp_sid + "&start_time=" + xml.getElementsByTagName('start_time').item(0).firstChild.nodeValue + "&total_upload_size=" + xml.getElementsByTagName('total_bytes').item(0).firstChild.nodeValue + "&cedric_progress_bar=" + xml.getElementsByTagName('cedric_progress_bar').item(0).firstChild.nodeValue;
					
				document.getElementById('progress_bar').style.display = "";
				document.getElementById('total_kbytes').innerHTML = Math.round(Number(xml.getElementsByTagName('total_bytes').item(0).firstChild.nodeValue / 1024)) + " ";
        			document.getElementById('progress_info').innerHTML = "Upload in corso";
				
				getProgressStatus();
				
				if(xml.getElementsByTagName('cedric_progress_bar').item(0).firstChild.nodeValue == 1){
					total_upload_size = xml.getElementsByTagName('total_bytes').item(0).firstChild.nodeValue;
	  				smoothCedricBytes();
	  				smoothCedricStatus();
				}
      			}
    		}
    		else{ 
    			document.getElementById('progress_info').innerHTML = "Errore: status code di ritorno " + req.status + " " + req.statusText;
    			//stopUpload();
    		}
  	}
}