var lock_uploadenable = false;
var upload_queue = [];
var filenow_xhr_slot = [];
var filenow_filecnt = 0;
var filenow_filesize = 0;
var timer_checkQueue = false;
var upload_cancel = false;
function uploadFile(_filedata, _callback) {
	if (!lock_uploadenable) return;
	if (!checkUploadFinished()) {
		viewUploadError(false, "別のアップロードが進行中です。");
		return;
	}
	if (_filedata.length <= 0) {
		return;
	}
	
	$('.area_fileupload').css("display", "none");
	$('.area_waitupload').css("display", "block");
	
	//進行中に追加
	var append = false;
	if (upload_queue.length > 0) {
		append = true;
	}
	
	if (!append) {
		updateUploadStatus(0, "しばらくおまちください...");
	}
	
	var now_filecnt = 0;
	var now_filesize = 0;
	for (var i=0; i<_filedata.length; i++) {
		if (!_filedata[i].name || _filedata[i].size <= 0) continue;
		
		now_filecnt ++;
		now_filesize += _filedata[i].size;
		
		upload_queue[upload_queue.length] = {
			id: upload_queue.length,
			filedata: _filedata[i],
			status: "wait",
			loaded: 0,
			server: false,
			url: "",
			hash: "",
			callback: _callback
		};
	}
	
	console.log("upload_queue: ", upload_queue);
	
	if (now_filecnt <= 0) {
		uploadClean(true);
		return;
	}
	if (filenow_filecnt+now_filecnt > 300) { //ファイル数制限を超えている
		viewUploadError(false, "ファイル個数制限を超えています。同時に300個までのファイルを送信できます。");
		uploadClean(true);
		return;
	}
	if (filenow_filesize+now_filesize >= 1024*1024*102400) { //ファイル制限超えてる
		viewUploadError(false, "サイズ制限を超えています。合計100GB (100,000MB)までのファイルを送信できます。");
		uploadClean(true);
		return;
	}
			
	filenow_filecnt = now_filecnt;
	filenow_filesize = now_filesize;
	
	console.log("total filecnt="+filenow_filecnt+", filesize="+Math.round(filenow_filesize/(1024*1024))+"MB");
	console.log("upload_queue: ", upload_queue);
	
	var postData = {};
	postData.action = "getUploadURL";
		
	var upload_files = {};
	for (var i in upload_queue) {
		upload_files[upload_queue[i].id] = {
			"filename": upload_queue[i].filedata.name,
			"size": upload_queue[i].filedata.size
		};
	}
	if (typeof uploadFileLists == 'function') {
		uploadFileLists(upload_files);
	}
	
	postData.upload_files = JSON.stringify(upload_files);
	
    $.ajax({
        url: "https://d.kuku.lu/_server.php",
        type: 'POST',
        cache: false,
        data: postData,
        dataType: "json"
    }).done(function(data){
    	if (data.result == "OK" && data.servers) {
    		for (var i in data.servers) {
    			upload_queue[i]["server"] = data.servers[i];
    		}
    		
    		console.log("upload_queue: ", upload_queue);
    		
    		if (!append) upload_start_time = (new Date().getTime());
    		
    		if (timer_checkQueue) {
    			clearInterval(timer_checkQueue);
    		}
    		timer_checkQueue = setInterval(checkQueue, 200);
    	} else {
    		viewUploadError(false, "現在サービスの問題のため一時的にアップロードができません。しばらく待ってから再度お試しください。");
    		uploadClean(true);
    	}
    }).fail(function(){
		viewUploadError("getServerFailed");
		uploadClean(true);
    });
}

	function checkQueue() {
		uploadProgress();
		
		//現在のパラレル数、完了数を取得
		var _now_upload_cnt = 0;
		var _now_complete_cnt = 0;
		for (var i=0; i<upload_queue.length; i++) {
			if (upload_queue[i].status == "upload") {
				_now_upload_cnt ++;
			} else if (upload_queue[i].status == "complete" || upload_queue[i].status == "error") {
				_now_complete_cnt ++;
			}
		}
		
		//全て完了
		if (_now_complete_cnt >= upload_queue.length) {
			//checkQueueを止める
			if (timer_checkQueue) {
				clearInterval(timer_checkQueue);
				timer_checkQueue = false;
			}
		
			finishUploadQueue();
			return;
		}
		
		//パラレル数が4未満なら新規アップロード開始
		if (_now_upload_cnt < 4) {
			for (var n=0; n<(4-_now_upload_cnt); n++) {
				for (var i=0; i<upload_queue.length; i++) {
					if (upload_queue[i].status == "wait") {
						upload_queue[i].status = "upload";
						//upload_queue[i].server = getUploadServer();
						startUpload(i);
						break;
					}
				}
			}
		}
	}
		function finishUploadQueue() {
			//1つでも成功しているものがあるか
			var _now_success_cnt = 0;
			for (var i=0; i<upload_queue.length; i++) {
				if (upload_queue[i].callback) continue;
				if (upload_queue[i].status == "complete") {
					_now_success_cnt ++;
				}
			}
			if (_now_success_cnt <= 0) {
				uploadClean();
				return;
			}
			
			if (upload_queue.length <= 1) { //単ファイルならそのまま
				var _url = upload_queue[0].url;
				var _hash = upload_queue[0].hash;
				
									finishUpload(_url);
					uploadClean();
								
			} else { //複数ファイルの場合はリスト化依頼
				var _link_hash = "";
				for (var i=0; i<upload_queue.length; i++) {
					if (upload_queue[i].callback) continue;
					if (upload_queue[i].status == "complete") {
						if (_link_hash) { _link_hash += ","; }
						_link_hash += upload_queue[i].hash;
					}
				}
			    $.ajax({
			        url:"https://d.kuku.lu/list.php",
			        type:'POST',
			        cache: false,
			        data:"&action=reglist&ajax=1&uuid=4f3ceb5b7ee1b5b42f4be8eb303aff9e&link_hash="+encodeURIComponent(_link_hash)+"",
			    }).done(function(data){
			    	try {
			    		data = JSON.parse(data);
			    	} catch(e) {
			    		console.log(e);
			    	}
			    	if (data.result == "OK" && data.url) {
			    		finishUpload(data.url);
			    	} else {
			    		viewUploadError("registerListFailed");
			    	}
			    	uploadClean();
			    }).fail(function(){
					viewUploadError("registerListFailed");
					uploadClean();
			    });
			}
		}
	
		function uploadProgress() {
			if (checkUploadFinished()) return;
			
			var _totalloaded = 0;
			for (var i=0; i<upload_queue.length; i++) {
				_totalloaded += upload_queue[i].loaded;
			}
			var percentComplete = Math.round(_totalloaded * 100 / filenow_filesize);
			updateUploadStatus(percentComplete.toString());
			
			if (percentComplete >= 100) {
				updateUploadStatus(false, '登録処理中です。ファイル数や容量によっては時間がかかります...');
			} else {
				var _speed_bps = 0;
				var _lefttime = "";
				
				try {
					if (upload_start_time && filenow_filesize && _totalloaded) {
						_speed_bps = (_totalloaded/(((new Date().getTime()) - upload_start_time)/1024));
									
						var _lefttime_sec = Math.ceil((filenow_filesize-_totalloaded) / _speed_bps);
						var _lefttime_min = Math.floor(_lefttime_sec / 60);
						_lefttime_sec -= _lefttime_min * 60;
						_lefttime = "(残り ";
						if (_lefttime_min) { _lefttime += ""+Math.ceil(_lefttime_min)+"分"; }
						_lefttime += ""+Math.ceil(_lefttime_sec)+"秒";
						_lefttime += ")";
					}
				} catch(e) {
					console.error(e);
				}
				
				updateUploadStatus(false, ""+viewBytes(_totalloaded)+" / "+viewBytes(filenow_filesize)+" - "+viewBytes(_speed_bps, "KB")+"/s - "+ percentComplete.toString() + "％ 完了<br>"+_lefttime);
			}
		}
	
	function startUpload(_queue_pos) {
		var _id = upload_queue[_queue_pos].id;
		console.log("startUpload", _id, upload_queue[_id]);
		
		var _method = upload_queue[_id]["server"]["method"];
		var _file_key = upload_queue[_id]["server"]["file_key"];
		
		filenow_xhr_slot[_id] = new XMLHttpRequest();
		var xhr = filenow_xhr_slot[_id];
		
		if (_method == "post") {
			var fd = new FormData();

							fd.append("ajax", "1");
						fd.append("uuid", "4f3ceb5b7ee1b5b42f4be8eb303aff9e");
			fd.append("country", "US");
			
			fd.append("file_1", upload_queue[_id]["filedata"]);
			fd.append("file_1_name", upload_queue[_id]["filedata"].name);
			fd.append("file_1_type", upload_queue[_id]["filedata"].type);
			fd.append("filecnt", 1);
		}

		xhr.upload.addEventListener("progress", function(e) {
			upload_queue[_id].loaded = e.loaded;
		}, false);
		xhr.addEventListener("load", function(e) {
			console.log("upload complete: ", _id, e);
			
			if (_method == "put") {
			    $.ajax({
			        url: "https://d.kuku.lu/_server.php",
			        type: 'POST',
			        cache: false,
			        dataType: "json",
			        data:"&action=registerFileByUser&uuid=4f3ceb5b7ee1b5b42f4be8eb303aff9e&file_key="+encodeURIComponent(_file_key),
			    }).done(function(data){
			    	if (data["result"] == "OK") {
						upload_queue[_id].status = "complete";
						upload_queue[_id].url = data["url"];
						upload_queue[_id].hash = data["hash"];
						
						if (upload_queue[_id].callback) {
							upload_queue[_id].callback(false, {"url": upload_queue[_id].url, "hash": upload_queue[_id].hash});
						}
			    	} else if (data["msg"]) {
						viewUploadError(false, data["msg"]);
						upload_queue[_id].status = "error";
			    	} else {
						viewUploadError("responseFailed");
						upload_queue[_id].status = "error";
			    	}
			    }).fail(function(){
			    	viewUploadError("registerFailed");
					upload_queue[_id].status = "error";
			    });
			} else {
				var _res = e.target.responseText;
				if (_res.indexOf("OK:") == 0) {
					upload_queue[_id].status = "complete";
					upload_queue[_id].url = _res.replace("OK:", "");
					upload_queue[_id].hash = _res.replace("OK:https://d.kuku.lu/", "");
					
					if (upload_queue[_id].callback) {
						upload_queue[_id].callback(false, {"url": upload_queue[_id].url, "hash": upload_queue[_id].hash});
					}
				} else if (_res.indexOf("NG:") == 0) {
					var _tmp = _res.replace("NG:", "");
					viewUploadError(false, ""+_tmp);
					upload_queue[_id].status = "error";
				} else {
					viewUploadError("responseFailed");
					upload_queue[_id].status = "error";
				}
			}
		}, false);
		xhr.addEventListener("error", function(e) {
			if (!upload_cancel) {
				viewUploadError("uploadFailed");
				upload_queue[_id].status = "error";
			}
			try {
				filenow_xhr_slot[_id].abort();
				filenow_xhr_slot[_id] = null;
			} catch(e) {
				console.log(e);
			}
		}, false);
		xhr.addEventListener("abort", function(e) {
			if (!upload_cancel) {
				upload_queue[_id].status = "error";
			}
			try {
				filenow_xhr_slot[_id].abort();
				filenow_xhr_slot[_id] = null;
			} catch(e) {
				console.log(e);
			}
		}, false);
		
		if (_method == "put") {
			xhr.open("PUT", upload_queue[_id]["server"]["url"]);
			xhr.send(upload_queue[_id]["filedata"]);
		} else {
			xhr.open("POST", upload_queue[_id]["server"]["url"]);
			xhr.send(fd);
		}
	}

	function uploadCancel() {
		upload_cancel = true;
		
		if (timer_checkQueue) {
			clearInterval(timer_checkQueue);
			timer_checkQueue = false;
		}
		
		$('.area_fileupload').css("display", "block");
		$('.area_waitupload').css("display", "none");

		console.log("filenow_xhr_slot: ", filenow_xhr_slot);
		for (var i=0; i<upload_queue.length; i++) {
			if (filenow_xhr_slot[upload_queue[i].id]) {
				try {
					filenow_xhr_slot[upload_queue[i].id].abort();
					filenow_xhr_slot[upload_queue[i].id] = null;
				} catch(e) {
					console.log(e);
				}
			}
		}
		filenow_xhr_slot = [];
		
		//upload_server = [];
		upload_queue = [];
		//filedata = false;
		filenow_filecnt = 0;
		filenow_filesize = 0;
		
		$("#file_upload").val("");
		
		setTimeout(function(){
			upload_cancel = false;
		}, 100);
			
		if (typeof uploadCancelAlt == 'function') {
			uploadCancelAlt();
		}
	}
	
	function uploadClean(_force) {
		if (!checkUploadFinished() && !_force) return;
		uploadCancel();
	}
	
	function checkUploadFinished() {
		//全部終わってるか確認
		var _now_complete_cnt = 0;
		for (var i=0; i<upload_queue.length; i++) {
			if (upload_queue[i].status == "complete" || upload_queue[i].status == "error") {
				_now_complete_cnt ++;
			}
		}
		if (_now_complete_cnt < upload_queue.length) {
			return false;
		}
		
		return true;
	}
	
function updateUploadStatus(_percent, _message) {
	if (_message) {
		$('.area_uploadstatus').html(_message);
	}
	
	if (_percent && _percent !== false) {
		_percent = parseInt(_percent);
		if (_percent <= 0) _percent = 0;
		if (_percent >= 100) _percent = 100;
		$('.area_uploadprogress').css("width", ""+_percent+"%");
	}
	
	if (typeof updateUploadStatusAlt == 'function') {
		updateUploadStatusAlt(_percent, _message);
	}
}

function viewUploadError(_code, _message) {
	if (upload_cancel) return;
	
	if (typeof viewUploadErrorAlt == 'function') {
		viewUploadErrorAlt(_code, _message);
	} else {
		if (_message) {
			alert(_message);
		} else {
			alert("ファイルの送信中にエラーが発生しました。もう一度お試しください。 ("+_code+")");
		}
	}
}

function viewBytes(num, _format){
	var _suff = "KB";
	if (num >= 1024*1024 && (!_format || _format == "MB")) { //MB
		num = Math.round((num) / (1024*1024));
		_suff = "MB";
	} else { //KB
		num = Math.round((num) / 1024);
		_suff = "KB";
	}
	
    return ""+(String(num).replace( /(\d)(?=(\d\d\d)+(?!\d))/g, '$1,'))+" "+_suff;
}

$(function(){
	$("#file_upload").change(function(){
		uploadFile(document.getElementById('file_upload').files);
	});
	$(".button_upload").click(function(){
		var $elm = $('#file_upload');
		if (document.createEvent) {
			$elm.show();
			var e = document.createEvent('MouseEvents');
			e.initEvent('click', true, true );
			$elm.get(0).dispatchEvent(e);
			$elm.hide();
		}
		else {
			$elm.show();
			$elm.trigger("click");
			$elm.hide();
		}
		return false;
	});
	

	$(".area_fileupload_drop").bind("dragover", function(e){
		e.originalEvent.preventDefault();
		return false;
	});
	$(".area_fileupload_drop").bind("dropstart", function(e){
		e.originalEvent.preventDefault();
		e.originalEvent.stopPropagation();
		return false;
	});
	$(".area_fileupload_drop").bind("drop", function(e){
		e.originalEvent.preventDefault();
		e.originalEvent.stopPropagation();
		
		console.log(e.type, e.target.id);
		
		console.log(e.originalEvent.dataTransfer.files);
		
		$(".area_fileupload_drop").css("display", "none");
		$(".area_fileupload").css("display", "block");
		
		uploadFile(e.originalEvent.dataTransfer.files);
		
		return false;
	});
	

	var next_dragleave_cancel = false;
	$("body").bind("dragenter", function(e){
		e.originalEvent.preventDefault();
		console.log(e.type, e.target.id, e.originalEvent);
		
		if ($(e.target).closest(".area_fileupload").length > 0) {
			$(".area_fileupload_drop_here").css("height", $(".area_fileupload").height());
			$(".area_fileupload").css("display", "none");
			$(".area_fileupload_drop").css("display", "block");
		}
		if ($(e.target).closest(".area_fileupload_fixed").length > 0) {
			$(".area_fileupload_drop").css("display", "block");
		}
		
		if (!$(e.target).hasClass('area_fileupload_drop_here') && $(e.target).closest(".area_fileupload_drop_here").length > 0) {
			next_dragleave_cancel = true;
		}
		
		return false;
	});
	$("body").bind("dragleave", function(e){
		e.originalEvent.preventDefault();
		console.log(e.type, e.target.id, e.originalEvent);
		
		console.log("next_dragleave_cancel: "+next_dragleave_cancel);
		if (next_dragleave_cancel) {
			next_dragleave_cancel = false;
			return false;
		}
		
		if ($(e.target).hasClass('area_fileupload_drop_here')) {
			$(".area_fileupload_drop").css("display", "none");
			$(".area_fileupload").css("display", "block");
		}
		
		return false;
	});
	
	$(".area_fileupload_drop_here").bind("click", function(e) {
		$(".area_fileupload_drop").css("display", "none");
		$(".area_fileupload").css("display", "block");
	});
	
	setTimeout(function(){
		lock_uploadenable = true;
		
			}, 500);

});