var upload_range = 2; //default: 0                                   
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 = 500;
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\.\-]{1,50}$/i;   
				
			if(!re.test(file_name)){	
  				alert("抱歉，上傳檔案發生錯誤。請確認您選擇的檔案沒有下列情形：\n\n1. 檔名不超過50個字元。\n2. 檔案符合檔案命名規則[檔名.副檔名]。\n3. 檔名之合法字元為 1-9, a-z, A-Z, '_', '-'。\n4. 檔名中未包含空白或中文字元。\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('抱歉，副檔名為 "' + file_extension + '" 的格式目前不支援。');
  				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('抱歉，副檔名為 "' + file_extension + '" 的格式目前不支援。');
  				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("請選擇上傳檔案。");
		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 = "Duplicate Upload Files Detected.\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 += '檔案重複："' + 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;
	//alert(upload_range);
	for(var i = 0; i < upload_range; i++){
		if(document.form_upload.elements['upfile_' + i].value != ""){ total_uploads++; }
	}
	//alert(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 resetForm(){ top.location.href = self.location; }

function iniFilePage(){
	//alert(document.getElementById('progress_bar'));
	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.getElementById('dataArea').style.display = "";
	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="48" onchange="addUploadSlot('+(upload_range + 1)+')">';
			//alert(dv);
			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');
	//alert("getProgressStatus");
	jsel.type = 'text/javascript';
	jsel.src = get_status_url + "&rnd_id=" + Math.random();
	//alert(jsel.src);
	document.body.appendChild(jsel);
	
	if(get_data_loop){ 
		self.setTimeout("getProgressStatus()", get_status_speed); 
		//alert("	get_status_speed done!!");
	} else {
		alert("	get_status_speed done!!");
	}
}

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 = "Error: AJAX 不被您使用的瀏覽器支援";
		return false;
	}
	else{ return req; }	
}

function iniProgressRequest(){
	var req = false;
	req = createRequestObject();
	
	if(req){
		document.getElementById('progress_info').innerHTML = "上傳資料整理中....";
		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;
			//alert(xml.getElementsByTagName('error_status').item(0).firstChild.nodeValue+'xml_0');
			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;
					//alert(document.getElementById('progress_bar'));
				document.getElementById('progress_bar').style.display = "";
				document.getElementById('dataArea').style.display = "none";
				document.getElementById('total_kbytes').innerHTML = Math.round(Number(xml.getElementsByTagName('total_bytes').item(0).firstChild.nodeValue / 1024)) + " ";
        		document.getElementById('progress_info').innerHTML = "資料上傳處理中，請稍候....";
				//alert("iniProgressResponse");
				getProgressStatus();
				//alert(xml.getElementsByTagName('cedric_progress_bar').item(0).firstChild.nodeValue+'xml');
				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 = "Error: 錯誤代碼 " + req.status + " " + req.statusText; 
    			//stopUpload();
    		}
  	}
}