(function ($) {
    $.fn.uploadify = function (opts) {
        var itemTemp = '<div id="${fileID}" class="uploadify-queue-item"><div class="uploadify-progress"><div class="uploadify-progress-bar"></div></div><span class="up_filename">${fileName}</span><a href="javascript:void(0);" class="uploadbtn">上传</a><a href="javascript:void(0);" class="delfilebtn">删除</a></div>';
        var defaults = {
            fileTypeExts: '*.*',//允许上传的文件类型，格式'*.jpg;*.doc'
            uploader: '',//文件提交的地址
            auto: true,//是否开启自动上传
            method: 'post',//发送请求的方式，get或post
            multi: true,//是否允许选择多个文件
            formData: null,//发送给服务端的参数，格式：{key1:value1,key2:value2}
            fileObjName: 'fileData',//在后端接受文件的参数名称，如PHP中的$_FILES['file']
            fileSizeLimit: 1024000,//允许上传的文件大小，单位KB
            showUploadedPercent: true,//是否实时显示上传的百分比，如20%
            showUploadedSize: false,//是否实时显示已上传的文件大小，如1M/2M
            buttonText: '选择文件',//上传按钮上的文字
            removeTimeout: 1000,//上传完成后进度条的消失时间，单位毫秒
            itemTemplate: itemTemp,//上传队列显示的模板
            onUploadStart: null,//上传开始时的动作
            onUploadSuccess: null,//上传成功的动作
            onUploadComplete: null,//上传完成的动作
            onUploadError: null, //上传失败的动作
            onInit: null,//初始化时的动作
            onCancel: null,//删除掉某个文件后的回调函数，可传入参数file
            onClearQueue: null,//清空上传队列后的回调函数，在调用cancel并传入参数*时触发
            onDestroy: null,//在调用destroy方法时触发
            onSelect: null,//选择文件后的回调函数，可传入参数file
            onQueueComplete: null,//队列中的所有文件上传完成后触发
            queueID:false
        }

        var option = $.extend(defaults, opts);

        //定义一个通用函数集合
        var F = {
            //将文件的单位由bytes转换为KB或MB，若第二个参数指定为true，则永远转换为KB
            formatFileSize: function (size, withKB) {
                if (size > 1024 * 1024 && !withKB) {
                    size = (Math.round(size * 100 / (1024 * 1024)) / 100).toString() + 'MB';
                }
                else {
                    size = (Math.round(size * 100 / 1024) / 100).toString() + 'KB';
                }
                return size;
            },
            //将输入的文件类型字符串转化为数组,原格式为*.jpg;*.png
            getFileTypes: function (str) {
                var result = [];
                var arr1 = str.split(";");
                for (var i = 0, len = arr1.length; i < len; i++) {
                    result.push(arr1[i].split(".").pop());
                }
                return result;
            },
            ////根据文件序号获取文件
            getFile: function (index, files) {
                for (var i = 0; i < files.length; i++) {
                    if (files[i].index == index) {
                        return files[i];
                    }
                }
                return null;
            }
        };

        var returnObj = null;

        this.each(function (index, element) {
            var _this = $(element);
            var _queue = option.queueID ? $("#" + option.queueID) : _this;
            var instanceNumber = $('.uploadify').length + 1;
            var uploadManager = {
                container: _this,
                filteredFiles: [],//过滤后的文件数组
                init: function () {
                    var inputStr = '<input id="select_btn_' + instanceNumber + '" class="selectbtn" style="display:none;" type="file" name="fileselect[]"';
                    inputStr += option.multi ? ' multiple' : '';
                    inputStr += ' accept=".';
                    inputStr += F.getFileTypes(option.fileTypeExts).join(",");
                    inputStr += '"/>';
                    inputStr += '<a id="file_upload_' + instanceNumber + '-button" href="javascript:void(0)" class="uploadify-button ' + option.buttonClass + '">';
                    inputStr += option.buttonText;
                    inputStr += '</a>';
                    var uploadFileListStr = "";
                    var uploadFileListStr = '<div id="file_upload_' + instanceNumber + '-queue" class="uploadify-queue"></div>';
                    if (option.queueID) {
                        $("#" + option.queueID).append(uploadFileListStr);
                        uploadFileListStr = "";
                    }

                    _this.append(inputStr + uploadFileListStr);

                    //初始化返回的实例
                    returnObj = {
                        instanceNumber: instanceNumber,
                        upload: function (fileIndex) {
                            if (fileIndex === '*') {
                                for (var i = 0, len = uploadManager.filteredFiles.length; i < len; i++) {
                                    uploadManager._uploadFile(uploadManager.filteredFiles[i]);
                                }
                            }
                            else {
                                var file = F.getFile(fileIndex, uploadManager.filteredFiles);
                                file && uploadManager._uploadFile(file);
                            }
                        },
                        cancel: function (fileIndex) {
                            if (fileIndex === '*') {
                                var len = uploadManager.filteredFiles.length;
                                for (var i = len - 1; i >= 0; i--) {
                                    uploadManager._deleteFile(uploadManager.filteredFiles[i]);
                                }
                                option.onClearQueue && option.onClearQueue(len);
                            }
                            else {
                                var file = F.getFile(fileIndex, uploadManager.filteredFiles);
                                file && uploadManager._deleteFile(file);
                            }
                        },
                        disable: function (instanceID) {
                            var parent = instanceID ? $('file_upload_' + instanceID + '-button') : $('body');
                            parent.find('.uploadify-button').css('background-color', '#888').off('click');
                        },
                        ennable: function (instanceID) {
                            //点击上传按钮时触发file的click事件
                            var parent = instanceID ? $('file_upload_' + instanceID + '-button') : $('body');
                            parent.find('.uploadify-button').css('background-color', '#707070').on('click', function () {
                                parent.find('.selectbtn').trigger('click');
                            });
                        },
                        destroy: function () {
                            uploadManager.container.html('');
                            uploadManager = null;
                            option.onDestroy && option.onDestroy();
                        },
                        settings: function (name, value) {
                            if (arguments.length == 1) {
                                return option[name];
                            }
                            else {
                                if (name == 'formData') {
                                    option.formData = $.extend(option.formData, value);
                                }
                                else {
                                    option[name] = value;
                                }
                            }
                        },
                        Huploadify: function () {
                            var method = arguments[0];
                            if (method in this) {
                                Array.prototype.splice.call(arguments, 0, 1);
                                this[method].apply(this[method], arguments);
                            }
                        }
                    };

                    //文件选择控件选择
                    var fileInput = this._getInputBtn();
                    if (fileInput.length > 0) {
                        fileInput.change(function (e) {
                            uploadManager._getFiles(e);
                        });
                    }

                    //点击选择文件按钮时触发file的click事件
                    _this.find('.uploadify-button').on('click', function () {
                        _this.find('.selectbtn').trigger('click');
                    });

                    option.onInit && option.onInit(returnObj);
                },
                _filter: function (files) {		//选择文件组的过滤方法
                    var arr = [];
                    var typeArray = F.getFileTypes(option.fileTypeExts);
                    if (typeArray.length > 0) {
                        for (var i = 0, len = files.length; i < len; i++) {
                            var f = files[i];
                            if (parseInt(F.formatFileSize(f.size, true)) <= option.fileSizeLimit) {
                                if ($.inArray('*', typeArray) >= 0 || $.inArray(f.name.split('.').pop(), typeArray) >= 0) {
                                    arr.push(f);
                                }
                                else {
                                    alert('文件 "' + f.name + '" 类型不允许！'); 
                                }
                            }
                            else {
                                alert('文件 "' + f.name + '" 大小超出限制！');
                                continue;
                            }
                        }
                    }
                    return arr;
                },
                _getInputBtn: function () {
                    return _this.find('.selectbtn');
                },
                _getFileList: function () {
                    return _queue.find('.uploadify-queue');
                },
                //根据选择的文件，渲染DOM节点
                _renderFile: function (file) {
                    var $html = $(option.itemTemplate.replace(/\${fileID}/g, 'fileupload_' + instanceNumber + '_' + file.index).replace(/\${fileName}/g, file.name).replace(/\${fileSize}/g, F.formatFileSize(file.size)).replace(/\${instanceID}/g, _this.attr('id')));
                    //如果是非自动上传，显示上传按钮
                    if (!option.auto) {
                        $html.find('.uploadbtn').css('display', 'inline-block');
                    }
                    uploadManager._getFileList().append($html);

                    //判断是否显示已上传文件大小
                    if (option.showUploadedSize) {
                        var num = '<span class="progressnum"><span class="uploadedsize">0KB</span>/<span class="totalsize">${fileSize}</span></span>'.replace(/\${fileSize}/g, F.formatFileSize(file.size));
                        $html.find('.uploadify-progress').after(num);
                    }

                    //判断是否显示上传百分比	
                    if (option.showUploadedPercent) {
                        var percentText = '<span class="up_percent">0%</span>';
                        $html.find('.uploadify-progress').after(percentText);
                    }

                    //触发select动作
                    option.onSelect && option.onSelect(file);

                    //判断是否是自动上传
                    if (option.auto) {
                        uploadManager._uploadFile(file);
                    }
                    else {
                        //如果配置非自动上传，绑定上传事件
                        $html.find('.uploadbtn').on('click', function () {
                            if (!$(this).hasClass('.disabledbtn')) {
                                $(this).addClass('.disabledbtn');
                                uploadManager._uploadFile(file);
                            }
                        });
                    }

                    //为删除文件按钮绑定删除文件事件
                    $html.find('.delfilebtn').on('click', function () {
                        if (!$(this).hasClass('.disabledbtn')) {
                            $(this).addClass('.disabledbtn');
                            uploadManager._deleteFile(file);
                        }
                    });
                },
                //获取选择后的文件
                _getFiles: function (e) {
                    var files = e.target.files;
                    files = uploadManager._filter(files);
                    var fileCount = _queue.find('.uploadify-queue .uploadify-queue-item').length;//队列中已经有的文件个数
                    for (var i = 0, len = files.length; i < len; i++) {
                        files[i].index = ++fileCount;
                        files[i].status = 0;//标记为未开始上传
                        uploadManager.filteredFiles.push(files[i]);
                        var l = uploadManager.filteredFiles.length;
                        uploadManager._renderFile(uploadManager.filteredFiles[l - 1]);
                    }
                },
                //删除文件
                _deleteFile: function (file) {
                    for (var i = 0, len = uploadManager.filteredFiles.length; i < len; i++) {
                        var f = uploadManager.filteredFiles[i];
                        if (f.index == file.index) {
                            uploadManager.filteredFiles.splice(i, 1);
                            _queue.find('#fileupload_' + instanceNumber + '_' + file.index).fadeOut();
                            option.onCancel && option.onCancel(file);
                            break;
                        }
                    }
                },
                //校正上传完成后的进度条误差
                _regulateView: function (file) {
                    var thisfile = _queue.find('#fileupload_' + instanceNumber + '_' + file.index);
                    thisfile.find('.uploadify-progress-bar').css('width', '100%');
                    option.showUploadedSize && thisfile.find('.uploadedsize').text(thisfile.find('.totalsize').text());
                    option.showUploadedPercent && thisfile.find('.up_percent').text('100%');
                },
                onProgress: function (file, loaded, total) {
                    var eleProgress = _queue.find('#fileupload_' + instanceNumber + '_' + file.index + ' .uploadify-progress');
                    var percent = (loaded / total * 100).toFixed(2) + '%';
                    if (option.showUploadedSize) {
                        eleProgress.nextAll('.progressnum .uploadedsize').text(F.formatFileSize(loaded));
                        eleProgress.nextAll('.progressnum .totalsize').text(F.formatFileSize(total));
                    }
                    if (option.showUploadedPercent) {
                        eleProgress.nextAll('.up_percent').text(percent);
                    }
                    eleProgress.children('.uploadify-progress-bar').css('width', percent);
                },
                _allFilesUploaded: function () {
                    var queueData = {
                        uploadsSuccessful: 0,
                        uploadsErrored: 0
                    };
                    for (var i = 0, len = uploadManager.filteredFiles.length; i < len; i++) {
                        var s = uploadManager.filteredFiles[i].status;
                        if (s === 0 || s === 1) {
                            queueData = false;
                            break;
                        }
                        else if (s === 2) {
                            queueData.uploadsSuccessful++;
                        }
                        else if (s === 3) {
                            queueData.uploadsErrored++;
                        }
                    }
                    return queueData;
                },
                //上传文件
                _uploadFile: function (file) {
                    var xhr = null;
                    try {
                        xhr = new XMLHttpRequest();
                    } catch (e) {
                        xhr = ActiveXobject("Msxml12.XMLHTTP");
                    }
                    if (xhr.upload) {
                        // 上传中
                        xhr.upload.onprogress = function (e) {
                            uploadManager.onProgress(file, e.loaded, e.total);
                        };

                        xhr.onreadystatechange = function (e) {
                            if (xhr.readyState == 4) {
                                if (xhr.status == 200) {
                                    uploadManager._regulateView(file);
                                    file.status = 2;//标记为上传成功
                                    option.onUploadSuccess && option.onUploadSuccess(file, "", xhr.responseText);
                                    //在指定的间隔时间后删掉进度条
                                    setTimeout(function () {
                                        _this.find('#fileupload_' + instanceNumber + '_' + file.index).fadeOut();
                                    }, option.removeTimeout);
                                }
                                else {
                                    file.status = 3;//标记为上传失败
                                    option.onUploadError && option.onUploadError(file, xhr.responseText);
                                }
                                option.onUploadComplete && option.onUploadComplete(file, xhr.responseText);

                                //检测队列中的文件是否全部上传完成，执行onQueueComplete
                                if (option.onQueueComplete) {
                                    var queueData = uploadManager._allFilesUploaded();
                                    queueData && option.onQueueComplete(queueData);
                                }

                                //清除文件选择框中的已有值
                                uploadManager._getInputBtn().val('');
                            }
                        }
                        if (file.status === 0) {
                            console.log(file);
                            file.status = 1;//标记为正在上传
                            option.onUploadStart && option.onUploadStart(file);
                            // 开始上传
                            xhr.open(option.method, option.uploader, true);
                            xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest");
                            var fd = new FormData();
                            fd.append(option.fileObjName, file);
                            if (option.formData) {
                                for (key in option.formData) {
                                    fd.append(key, option.formData[key]);
                                }
                            }
                            xhr.send(fd);
                        }

                    }
                }
            };

            uploadManager.init();
        });

        return returnObj;

    }
})(jQuery)