/**
 * modify 2017/9/25.
 */
(function($) {
  var FileUploader = function(element, options) {
    var that = this;
    this.element = $(element);
    this.container = options.container || "body";
    this.isInput = options.isInput || true;
    this.isInline = true;

    this.concurrentHash = options.concurrentHash || 3;
    this.concurrentUpload = options.concurrentUpload || 3;
    this.concurrentHashCurrent = 0;
    this.wsuri = options.wsuri;
    this.debugMode = options.debugMode || false;

    this.onSuccess = options.onSuccess;

    this.fileInput = $(UPGlobal.fileInput)
      .appendTo(this.container)
      .on({
        change: $.proxy(this.fileSelect, this)
      });
    if (this.debugMode) {
      UPGlobal.template += UPGlobal.consTemplate;
    }
    this.panel = $(UPGlobal.template)
      .appendTo(this.isInline ? this.element : this.container)
      .on({
        click: $.proxy(this.click, this)
      });
    this.attachDragEvents();
    this.initWS();
  };
  FileUploader.prototype = {
    initWS: function() {
      if ("WebSocket" in window) {
        for (var i = 0; i < this.concurrentUpload; i++) {
          var ws = new WebSocket(this.wsuri);

          ws.onopen = this.onOpen(this);
          ws.onmessage = this.onMessage(this);
          UPGlobal.wsS.push(ws);
        }
      } else if ("MozWebSocket" in window) {
        for (var i = 0; i < this.concurrentUpload; i++) {
          var ws = new MozWebSocket(this.wsuri);
          ws.onopen = this.onOpen;
          ws.onmessage = this.onMessage;
          UPGlobal.wsS.push(ws);
        }
      } else {
        alert("Websocket create error.");
      }
    },
    onOpen: function(that) {
      return function() {
        that.log("Websocket is opened.");
      };
    },
    onMessage: function(that) {
      return function(e) {
        var ws = this;
        var obj = JSON.parse(e.data);
        if (obj.typeId == "uploadCommand") {
          that.log(
            "文件完成：" + parseInt(obj.completePercent * 65 + 35, 10) + "%"
          );
          $('[name="' + obj.fileId + '"]').css(
            "width",
            parseInt(obj.completePercent * 65 + 35, 10) + "%"
          );
          if (obj.completePercent != 1) {
            that.doUploadByCommand(ws, obj);
          } else {
            UPGlobal.fileUploadStepMap[
              UPGlobal.fileIdToFileNameMap[obj.fileId]
            ] = 4; //onSuccess
            if (that.onSuccess) {
              //console.log(obj);

              that.onSuccess({
                fileId: obj.fileId,
                fileName: obj.fileName,
                fileSize: obj.fileSize
              });
            }
            that.log("文件上传完成，开始上传下一个文件。");
            that.uploadNextFile(ws); //该ws完成文件上传，接着继续上传下一个文件
            $('[name="' + obj.fileId + '"]')
              .closest(".progress")
              .slideUp(1000)
              .closest("td")
              .css("color", "#428bca");
          }
        } //if end
      };
    },
    hashNextFile: function() {
      if (UPGlobal.filesToUpload.length != 0) {
        var f = UPGlobal.filesToUpload.shift();
        var worker = new Worker("fileupload/calculator.worker.fileId.js");
        worker.addEventListener("message", this.handleHashWorkerEvent(f));
        UPGlobal.workers[f.name] = worker; //记录每个文件的worker用于后面清除worker
        this.doHashWork(f, worker);
      } else {
        //Hash计算完毕要恢复此值
        this.concurrentHashCurrent = 0;
      }
    },
    startHashFile: function() {
      for (
        var f, worker;
        this.concurrentHashCurrent < this.concurrentHash;
        this.concurrentHashCurrent++
      ) {
        if (UPGlobal.filesToUpload.length == 0) break;
        f = UPGlobal.filesToUpload.shift();
        worker = new Worker(
          "../../AFrontEnd/plugins/fileupload/js/calculator.worker.fileId.js"
        );
        worker.addEventListener("message", this.handleHashWorkerEvent(f));
        UPGlobal.workers[f.name] = worker; //记录每个文件的worker用于后面清除worker
        this.doHashWork(f, worker);
      }
    },
    doHashWork: function(file, worker) {
      UPGlobal.fileUploadStepMap[file.name] = 1; //文件上传进入计算文件hash状态
      var i,
        buffer_size,
        block,
        reader,
        blob,
        handle_hash_block,
        handle_load_block;

      //发送数据
      handle_load_block = function(event) {
        worker.postMessage({
          message: event.target.result,
          block: block
        });
      };
      handle_hash_block = function(event) {
        if (block.end !== file.size) {
          block.start += buffer_size;
          block.end += buffer_size;

          if (block.end > file.size) {
            block.end = file.size;
          }
          reader = new FileReader();
          reader.onload = handle_load_block;
          blob = file.slice(block.start, block.end);

          reader.readAsArrayBuffer(blob);
        }
      };
      buffer_size = 512 * 1024;
      block = {
        file_size: file.size,
        start: 0
      };
      block.end = buffer_size > file.size ? file.size : buffer_size;
      worker.addEventListener("message", handle_hash_block);
      reader = new FileReader();
      reader.onload = handle_load_block;
      blob = file.slice(block.start, block.end);
      reader.readAsArrayBuffer(blob);
    },
    startUploadFile: function(f) {
      if (UPGlobal.wsS.length != 0) {
        var ws = UPGlobal.wsS.shift(); //返回第一个元素，pop（）返回最后一个元素。
        this.sendFileInfo(ws, f);
        this.log(
          "已从ws连接池中取出第一个ws连接，已发送[" +
            f.name +
            "]文件信息，正在使用的ws连接加1."
        );
        UPGlobal.filesUploaded.push(f);
      } else {
        UPGlobal.filesHasHashed.push(f);
        UPGlobal.fileUploadStepMap[f.name] = 2; //onWaiting
        this.log(
          "ws连接池中没有可用连接，已将[" + f.name + "]放入已计算Hash文件池中."
        );
      }
    },
    uploadNextFile: function(ws) {
      if (UPGlobal.filesHasHashed.length != 0) {
        var f = UPGlobal.filesHasHashed.shift();
        this.sendFileInfo(ws, f);
        this.log(
          "从已计算Hash文件池中取出文件[" + f.name + "]，并发送文件信息."
        );
        UPGlobal.filesUploaded.push(f);
      } else {
        //文件上传结束，回收ws连接
        UPGlobal.wsS.push(ws);
        this.log("没有已计算出Hash值的文件可上传，回收ws连接到连接池中.");
      }
    },
    sendFileInfo: function(ws, f) {
      var fileInfo = {};
      fileInfo.fileName = f.name;
      fileInfo.fileSize = f.size;
      fileInfo.fileInfo = f.type;
      fileInfo.fileId = f.fileId;
      ws.send(JSON.stringify(fileInfo));
      UPGlobal.fileUploadStepMap[f.name] = 3; //onUploading
    },
    doUploadByCommand: function(ws, command) {
      var fileName = UPGlobal.fileIdToFileNameMap[command.fileId];
      var f = UPGlobal.allFiles[fileName];
      if (f) {
        var blob = f.slice(command.indexStart, command.indexEnd);
        var reader = new FileReader();
        reader.onload = function(e) {
          //            this.log('Sending data: '+blob.size);
          ws.send(e.target.result);
        };
        reader.readAsArrayBuffer(blob);
      } else {
        this.uploadNextFile(ws);
      }
    },
    handleHashWorkerEvent: function(f) {
      var that = this;
      return function(e) {
        if (e.data.result) {
          this.concurrentHashCurrent--;
          var fileId = e.data.result;
          console.log(fileId);
          //此处设置到name属性而不是id属性，是因为如果本地有相同fileId时，则进度显示会出问题（不会影响文件上传）。
          $('[name="' + f.name + '"]')
            .find(".progress-bar")
            .css("width", "35%")
            .attr("name", fileId);
          UPGlobal.workers[f.name].terminate(); //关闭workers
          delete UPGlobal.workers[f.name];

          f["fileId"] = fileId;
          UPGlobal.fileIdToFileNameMap[fileId] = f.name; //将文件对应的fileId存储到map中
          that.log("文件已算出hash值，开始上传文件：" + f.name);
          that.startUploadFile(f);

          that.hashNextFile(); //hash next file
        } else {
          $('[name="' + f.name + '"]')
            .find(".progress-bar")
            .css("width", e.data.block.end * 35 / e.data.block.file_size + "%");
        }
      };
    },
    click: function(e) {
      var target = $(e.target).closest("#addfile,td,.drop-zone");
      var addfile = this.panel.find("#addfile");
      var removefile = this.panel.find("tbody tr td:nth-last-child(1)");
      var dropZone = this.panel.find(".drop-zone");
      if (target.is(addfile) || target.is(dropZone)) {
        $("#files").val("");
        $("#files").trigger("click");
      } else if (target.is(removefile)) {
        var $this = target;
        var fileName = $this
          .closest("tr")
          .remove()
          .find(".progress-bar")
          .closest("td")
          .find("span")
          .html();
        //console.log(fileName);
        this.doRemoveFileWork(fileName);
      }
    },
    doRemoveFileWork: function(fileName) {
      var fileStep = UPGlobal.fileUploadStepMap[fileName];
      switch (fileStep) {
        case 0:
          //alert('nothing');
          //delete file from filesToUpload
          this.removeFileFromArray(fileName, UPGlobal.filesToUpload);
          break;
        case 1:
          //alert('onHashing');
          UPGlobal.workers[fileName].terminate();
          //delete file from filesHasHashed ??不需要，这个时候还没有放入filesHasHashed中
          this.concurrentHashCurrent--;
          this.removeFileFromArray(fileName);
          this.hashNextFile();
          break;
        case 2:
          //alert('onWaiting');
          //delete file from filesHasHashed
          this.removeFileFromArray(fileName, UPGlobal.filesHasHashed);
          break;
        case 3:
          //alert('onUploading');
          //delete file from filesUploaded ??不需要，这个时候还没有放入fileHasHashed中
          this.removeFileFromArray(fileName); //移除之后通过command上传将找不到file而终止文件上传。并自动开始上传下一个文件
          break;
        case 4:
          //alert('onSuccess');
          //delete file from filesUploaded
          this.removeFileFromArray(fileName, UPGlobal.filesUploaded);
          break;
      }
    },
    removeFileFromArray: function(fileName, filesArray) {
      delete UPGlobal.allFiles[fileName];
      console.log(UPGlobal.allFiles);
      if (filesArray) {
        for (var i = 0; i < filesArray.length; i++) {
          if (fileName === filesArray[i].name) {
            filesArray.splice(i, 1);
            break;
          }
        }
      }
      console.log(filesArray);
      //setAllHeigth(-5);
    },
    attachDragEvents: function() {
      var tablepanel = document.getElementsByClassName("tablepanel");
      tablepanel[0].addEventListener("dragover", $.proxy(this.dragOver, this));
      tablepanel[0].addEventListener("drop", $.proxy(this.fileSelect, this));
    },
    dragOver: function(e) {
      e.stopPropagation();
      e.preventDefault();
    },
    fileSelect: function(e) {
      e.stopPropagation();
      e.preventDefault();
      this.hideDropzone();
      var files = e.dataTransfer ? e.dataTransfer.files : e.target.files;
      var output = [];
      for (var i = 0, f; (f = files[i]); i++) {
        if (!UPGlobal.allFiles[f.name]) {
          var process =
            '<div name="' +
            f.name +
            '" class="progress"><div class="progress-bar progress-bar-striped active" aria-valuemin="0" aria-valuemax="100" style="width: 0%"></div></div>';
          output.push(
            "<tr><td><span>" +
              f.name +
              "</span>(" +
              this.formatFileSize(f.size) +
              ")" +
              process +
              '</td><td><span class="glyphicon glyphicon-remove"></span></td></tr>'
          );

          UPGlobal.allFiles[f.name] = f;
          UPGlobal.filesToUpload.push(f);
          UPGlobal.fileUploadStepMap[f.name] = 0;
        }
      }
      this.panel.find("tbody").append(output.join(""));
      //setAllHeigth(-5);
      this.startHashFile(); //计算hash
    },
    formatFileSize: function(fileSize, lenght) {
      var r;
      var l = lenght || 2;
      for (var k in UPGlobal.fileSizeFormats) {
        var v = UPGlobal.fileSizeFormats[k];
        r = fileSize / v;
        if (r >= 1 && r < 1000) {
          r = parseInt(r * Math.pow(10, l), 10) / Math.pow(10, l) + k;
          break;
        }
      }
      return r;
    },
    hideDropzone: function() {
      $(".drop-zone").slideUp(500);
    },
    log: function(message) {
      if (this.debugMode) {
        var console = document.getElementById("console");
        var p = document.createElement("p");
        p.style.wordWrap = "break-word";
        p.appendChild(document.createTextNode(message));
        console.appendChild(p);
        while (console.childNodes.length > 50) {
          console.removeChild(console.firstChild);
        }
        console.scrollTop = console.scrollHeight;
      }
    }
  };
  $.fn.fileuploader = function(option) {
    var args = Array.apply(null, arguments);
    args.shift();
    var internal_return;
    this.each(function() {
      var $this = $(this),
        data = $this.data("fileuploader"),
        options = typeof option == "object" && option;
      if (!data) {
        $this.data(
          "fileuploader",
          (data = new FileUploader(
            this,
            $.extend({}, $.fn.fileuploader.defaults, options)
          ))
        );
      }
      if (typeof option == "string" && typeof data[option] == "function") {
        internal_return = data[option].apply(data, args);
        if (internal_return !== undefined) {
          return false;
        }
      }
    });
    if (internal_return != undefined) {
      return internal_return;
    } else {
      return this;
    }
  };
  $.fn.fileuploader.defaults = {};
  $.fn.fileuploader.Constructor = FileUploader;
    ///拼dom，简化版上传按钮控件
  var UPGlobal = {
    allFiles: {},
    filesToUpload: [],
    filesHasHashed: [],
    filesUploaded: [],
    fileIdToFileNameMap: {},
    fileUploadStepMap: {}, //0,nothing;1,onHashing;2,onWaiting;3,onUploading;4,onSuccess
    workers: {},
    wsS: [],
    fileSizeFormats: {
      Byte: Math.pow(10, 0),
      KB: Math.pow(10, 3),
      MB: Math.pow(10, 6),
      GB: Math.pow(10, 9),
      TB: Math.pow(10, 12),
      PB: Math.pow(10, 15),
      EB: Math.pow(10, 18),
      ZB: Math.pow(10, 21),
      YB: Math.pow(10, 24),
      BB: Math.pow(10, 27)
    },
    headTemplate: "",
      ///拼dom，简化版上传按钮控件
    contTemplate:
      '<div class="tablepanel panel-body" style="disP"><table class="table table-hover"><tbody></tbody></table>',
    footTemplate:
      '<div class="panel-footer"><div class="btn-group">' +
      '<div class="btn btn-default" id="addfile">添加</div>' +
      "</div></div>",
    consTemplate: '<div id="console" class="well"></div>',
    finpTemplate:
      '<input id="files" type="file" multiple style="display: none"/>'
  };
  UPGlobal.template =
    '<div class="panel panel-default">' +
    UPGlobal.headTemplate +
    UPGlobal.contTemplate +
    UPGlobal.footTemplate +
    "</div>";
  UPGlobal.fileInput = UPGlobal.finpTemplate;
  $.fn.fileuploader.UPGlobal = UPGlobal;
})(jQuery);