import { Msg } from "../../foundation/message";
import { shortcut, Widget, some, extend, jsonDecode, appendQuery, emptyFn, i18nText } from "@/core";

/**
 * 文件
 *
 * Created by GUY on 2016/1/27.
 * @class File
 * @extends Single
 * @abstract
 */

const document = _global.document || {};

/**
 * @description normalize input.files. create if not present, add item method if not present
 * @param       Object      generated wrap object
 * @return      Object      the wrap object itself
 */
const F = (item => input => {
    const files = input.files || [input];
    if (!files.item) {
        files.item = item;
    }

    return files;
})(i => this[i]);

const event = {

    /**
     * @description add an event via addEventListener or attachEvent
     * @param       DOMElement  the element to add event
     * @param       String      event name without "on" (e.g. "mouseover")
     * @param       Function    the callback to associate as event
     * @return      Object      noswfupload.event
     */
    add: document.addEventListener
        ? (node, name, callback) => {
            node.addEventListener(name, callback, false);

            return this;
        }
        : (node, name, callback) => {
            node.attachEvent(`on${name}`, callback);

            return this;
        },

    /**
     * @description remove an event via removeEventListener or detachEvent
     * @param       DOMElement  the element to remove event
     * @param       String      event name without "on" (e.g. "mouseover")
     * @param       Function    the callback associated as event
     * @return      Object      noswfupload.event
     */
    del: document.removeEventListener
        ? (node, name, callback) => {
            node.removeEventListener(name, callback, false);

            return this;
        }
        : (node, name, callback) => {
            node.detachEvent(`on${name}`, callback);

            return this;
        },

    /**
     * @description to block event propagation and prevent event default
     * @param       void        generated event or undefined
     * @return      Boolean     false
     */
    stop(e) {
        if (!e) {
            if (self.event) {
                event.returnValue = !(event.cancelBubble = true);
            }
        } else {
            e.stopPropagation ? e.stopPropagation() : (e.cancelBubble = true);
            e.preventDefault ? e.preventDefault() : (e.returnValue = false);
        }

        return false;
    },
};

const sendFile = (toString => {
    const split = "onabort.onerror.onloadstart.onprogress".split("."),
        length = split.length,
        CRLF = "\r\n";
    let xhr = new XMLHttpRequest(),
        sendFile;
    const multipart = (boundary, name, file) =>
        "--".concat(
            boundary,
            CRLF,
            "Content-Disposition: form-data; name=\"",
            name,
            "\"; filename=\"",
            _global.encodeURIComponent(file.fileName),
            "\"",
            CRLF,
            "Content-Type: application/octet-stream",
            CRLF,
            CRLF,
            file.getAsBinary(),
            CRLF,
            "--",
            boundary,
            "--",
            CRLF
        );
    const isFunction = Function => toString.call(Function) === "[object Function]";

    // FireFox 3+, Safari 4 beta (Chrome 2 beta file is buggy and will not work)
    if (xhr.upload || xhr.sendAsBinary) {
        sendFile = (handler, maxSize, width, height) => {
            const current = handler.current;
            if (-1 < maxSize && maxSize < handler.file.fileSize) {
                if (isFunction(handler.onerror)) {
                    handler.onerror();
                }

                return;
            }
            const xhr = new XMLHttpRequest(),
                upload = xhr.upload || {
                    addEventListener(event, callback) {
                        this[`on${event}`] = callback;
                    },
                };
            for (let i = 0; i < length; i++) {
                upload.addEventListener(
                    split[i].substring(2),
                    // eslint-disable-next-line no-loop-func
                    (event => rpe => {
                        if (isFunction(handler[event])) {
                            handler[event](rpe, xhr);
                        }
                    })(split[i]),
                    false
                );
            }
            upload.addEventListener(
                "load",
                rpe => {
                    if (handler.onreadystatechange === false) {
                        if (isFunction(handler.onload)) {
                            handler.onload(rpe, xhr);
                        }
                    } else {
                        const callback = () => {
                            if (xhr.readyState === 4) {
                                if (isFunction(handler.onload)) {
                                    handler.onload(rpe, xhr);
                                }
                            } else {
                                setTimeout(callback, 15);
                            }
                        };
                        setTimeout(callback, 15);
                    }
                },
                false
            );
            xhr.open(
                "post",
                appendQuery(handler.url, {
                    filename: _global.encodeURIComponent(handler.file.fileName),
                }),
                true
            );
            if (!xhr.upload) {
                const rpe = { loaded: 0, total: handler.file.fileSize || handler.file.size, simulation: true };
                rpe.interval = setInterval(() => {
                    rpe.loaded += 1024 / 4;
                    if (rpe.total <= rpe.loaded) {
                        rpe.loaded = rpe.total;
                    }
                    upload.onprogress(rpe);
                }, 100);
                xhr.onabort = () => {
                    upload.onabort({});
                };
                xhr.onerror = () => {
                    upload.onerror({});
                };
                xhr.onreadystatechange = () => {
                    switch (xhr.readyState) {
                        case 2:
                        case 3:
                            if (rpe.total <= rpe.loaded) {
                                rpe.loaded = rpe.total;
                            }
                            upload.onprogress(rpe);
                            break;
                        case 4:
                            clearInterval(rpe.interval);
                            rpe.interval = 0;
                            rpe.loaded = rpe.total;
                            upload.onprogress(rpe);
                            if (199 < xhr.status && xhr.status < 400) {
                                upload.onload({});
                                const attachO = jsonDecode(xhr.responseText);
                                attachO.filename = handler.file.fileName;
                                if (handler.file.type.indexOf("image") !== -1) {
                                    attachO.attach_type = "image";
                                }
                                handler.attach_array[current] = attachO;
                            } else {
                                upload.onerror({});
                            }
                            break;
                        default:
                            break;
                    }
                };
                upload.onloadstart(rpe);
            } else {
                xhr.onreadystatechange = () => {
                    switch (xhr.readyState) {
                        case 4: {
                            const attachO = jsonDecode(xhr.responseText);
                            if (handler.file.type.indexOf("image") !== -1) {
                                attachO.attach_type = "image";
                            }
                            attachO.filename = handler.file.fileName;
                            if (handler.maxLength === 1) {
                                handler.attach_array[0] = attachO;
                            //                                   handler.attach_array.push(attachO);
                            } else {
                                handler.attach_array[current] = attachO;
                            }
                            break;
                        }
                        default:
                            break;
                    }
                };
                if (isFunction(upload.onloadstart)) {
                    upload.onloadstart();
                }
            }
            const boundary = `AjaxUploadBoundary${new Date().getTime()}`;
            xhr.setRequestHeader("Content-Type", `multipart/form-data; boundary=${boundary}`);
            if (handler.file.getAsBinary) {
                xhr[xhr.sendAsBinary ? "sendAsBinary" : "send"](multipart(boundary, handler.name, handler.file));
            } else {
                xhr.setRequestHeader("Content-Type", "multipart/form-data");
                //                    xhr.setRequestHeader("X-Name", handler.name);
                //                    xhr.setRequestHeader("X-File-Name", handler.file.fileName);
                const form = new FormData();
                form.append("FileData", handler.file);
                xhr.send(form);
            }

            return handler;
        };
    } else {
        // Internet Explorer, Opera, others
        sendFile = (handler, maxSize, width, height) => {
            const current = handler.current;
            let iframe, form;
            const url = handler.url.concat(-1 === handler.url.indexOf("?") ? "?" : "&", "AjaxUploadFrame=true"),
                rpe = {
                    loaded: 1,
                    total: 100,
                    simulation: true,
                    interval: setInterval(() => {
                        if (rpe.loaded < rpe.total) {
                            ++rpe.loaded;
                        }
                        if (isFunction(handler.onprogress)) {
                            handler.onprogress(rpe, {});
                        }
                    }, 100),
                },
                target = ["AjaxUpload", new Date().getTime(), String(Math.random()).substring(2)].join("_");
            const onload = () => {
                iframe.onreadystatechange = iframe.onload = iframe.onerror = null;
                form.parentNode.removeChild(form);
                form = null;
                clearInterval(rpe.interval);
                // rpe.loaded = rpe.total;
                const responseText = (iframe.contentWindow.document || iframe.contentWindow.contentDocument).body
                    .innerHTML;
                try {
                    const attachO = jsonDecode(responseText);
                    if (handler.file.type.indexOf("image") !== -1) {
                        attachO.attach_type = "image";
                    }

                    // attachO.fileSize = responseText.length;
                    try {
                        // decodeURIComponent特殊字符可能有问题, catch一下，保证能正常上传
                        attachO.filename = _global.decodeURIComponent(handler.file.fileName);
                    } catch (e) {
                        attachO.filename = handler.file.fileName;
                    }
                    if (handler.maxLength === 1) {
                        handler.attach_array[0] = attachO;
                    } else {
                        handler.attach_array[current] = attachO;
                    }
                } catch (e) {
                    if (isFunction(handler.onerror)) {
                        handler.onerror(rpe, event || _global.event);
                    }
                }
                if (isFunction(handler.onload)) {
                    handler.onload(rpe, { responseText });
                }
            };

            try {
                // IE < 8 does not accept enctype attribute ...
                // eslint-disable-next-line no-unused-vars
                const form = document.createElement("<form enctype=\"multipart/form-data\"></form>"),
                    // eslint-disable-next-line no-unused-vars
                    iframe =
                        handler.iframe ||
                        (handler.iframe = document.createElement(
                            `<iframe id="${target}" name="${target}" src="${url}"></iframe>`
                        ));
            } catch (e) {
                const form = document.createElement("form"),
                    iframe = handler.iframe || (handler.iframe = document.createElement("iframe"));
                form.setAttribute("enctype", "multipart/form-data");
                iframe.setAttribute("name", (iframe.id = target));
                iframe.setAttribute("src", url);
            }
            iframe.style.position = "absolute";
            iframe.style.left = iframe.style.top = "-10000px";
            iframe.onload = onload;
            iframe.onerror = event => {
                if (isFunction(handler.onerror)) {
                    handler.onerror(rpe, event || _global.event);
                }
            };
            iframe.onreadystatechange = () => {
                if (/loaded|complete/i.test(iframe.readyState)) {
                    onload();

                    // wei : todo,将附件信息放到handler.attach
                } else if (isFunction(handler.onloadprogress)) {
                    if (rpe.loaded < rpe.total) {
                        ++rpe.loaded;
                    }
                    handler.onloadprogress(rpe, {
                        readyState:
                            {
                                loading: 2,
                                interactive: 3,
                                loaded: 4,
                                complete: 4,
                            }[iframe.readyState] || 1,
                    });
                }
            };
            form.setAttribute("action", `${handler.url}&filename=${_global.encodeURIComponent(handler.file.fileName)}`);
            form.setAttribute("target", iframe.id);
            form.setAttribute("method", "post");
            form.appendChild(handler.file);
            form.style.display = "none";
            if (isFunction(handler.onloadstart)) {
                handler.onloadstart(rpe, {});
            }
            const d = document.body || document.documentElement;
            d.appendChild(iframe);
            d.appendChild(form);
            form.submit();

            return handler;
        };
    }
    xhr = null;

    return sendFile;
})(Object.prototype.toString);

const sendFiles = (handler, maxSize, width, height) => {
    const length = handler.files.length,
        onload = handler.onload,
        onloadstart = handler.onloadstart;
    handler.current = 0;
    handler.total = 0;
    handler.sent = 0;
    while (handler.current < length) {
        handler.total += handler.files[handler.current].fileSize || handler.files[handler.current].size;
        handler.current++;
    }
    handler.current = 0;
    if (length && handler.files[0].fileSize !== -1) {
        handler.file = handler.files[handler.current];
        const callback = (rpe, xhr) => {
            handler.onloadstart = null;
            handler.sent += handler.files[handler.current].fileSize || handler.files[handler.current].size;
            if (++handler.current < length) {
                handler.file = handler.files[handler.current];
                sendFile(handler, maxSize, width, height).onload = callback;
            } else if (onload) {
                handler.onloadstart = onloadstart;
                handler.onload = onload;
                handler.onload(rpe, xhr);
            }
        };
        sendFile(handler, maxSize, width, height).onload = callback;
    } else if (length) {
        handler.total = length * 100;
        handler.file = handler.files[handler.current];
        const callback = (rpe, xhr) => {
            handler.onloadstart = null;
            handler.sent += 100;
            if (++handler.current < length) {
                if (/\b(chrome|safari)\b/i.test(navigator.userAgent)) {
                    handler.iframe.parentNode.removeChild(handler.iframe);
                    handler.iframe = null;
                }
                setTimeout(() => {
                    handler.file = handler.files[handler.current];
                    sendFile(handler, maxSize, width, height).onload = callback;
                }, 15);
            } else if (onload) {
                setTimeout(() => {
                    handler.iframe.parentNode.removeChild(handler.iframe);
                    handler.iframe = null;
                    handler.onloadstart = onloadstart;
                    handler.onload = onload;
                    handler.onload(rpe, xhr);
                }, 15);
            }
        };
        sendFile(handler, maxSize, width, height).onload = callback;
    }

    return handler;
};

const r1 = /\.([^.]+)$/; //  .png
const r2 = /\/([^/]+)$/; //  image/png

/**
 * 校验文件类型是否合法,同时兼容旧版形式
 * @param fileName
 * @param fileType
 * @returns {boolean}
 */
const fileTypeValidate = (fileName, fileType) => {
    if (!fileType) {
        return true;
    }
    let mimes = fileType.split(",");
    if (mimes[0] === fileType) {
        mimes = `${fileType}`.split(";");
    }

    return some(mimes, (index, mime) => {
        let matches;
        matches = mime.match(r1);
        if (matches) {
            return fileName.toLowerCase().indexOf(matches[1]) > -1;
        }
        matches = mime.match(r2);
        if (matches) {
            return matches[1] === "*" ? true : fileName.toLowerCase().indexOf(matches[1]) > -1;
        }
    });
};

@shortcut()
export class File extends Widget {
    static xtype = "bi.file";

    static EVENT_CHANGE = "EVENT_CHANGE";
    static EVENT_UPLOADSTART = "EVENT_UPLOADSTART";
    static EVENT_ERROR = "EVENT_ERROR";
    static EVENT_PROGRESS = "EVENT_PROGRESS";
    static EVENT_UPLOADED = "EVENT_UPLOADED";

    _defaultConfig() {
        const conf = super._defaultConfig(...arguments);

        return extend(conf, {
            baseCls: `${conf.baseCls || ""} bi-file display-block`,
            tagName: "input",
            attributes: {
                type: "file",
            },
            name: "",
            url: "",
            multiple: true,
            accept: "", //  .png,.pdf,image/jpg,image/*  等
            maxSize: -1, // 1024 * 1024 单位b
            maxLength: -1, // 无限制, 与multiple配合使用
            errorText: emptyFn,
        });
    }

    render() {
        const { multiple, name, title, accept } = this.options;
        if (multiple === true) {
            this.element.attr("multiple", "multiple");
        }
        this.element.attr("name", name || this.getName());
        this.element.attr("title", title || "");
        this.element.attr("accept", accept);
    }

    created() {
        const { maxSize, url, accept } = this.options;
        // create the noswfupload.wrap Object
        // wrap.maxSize 文件大小限制
        // wrap.maxLength 文件个数限制
        const _wrap = (this.wrap = this._wrap(this.element[0], maxSize));
        // fileType could contain whatever text but filter checks *.{extension}
        // if present

        // handlerszhe

        _wrap.onloadstart = (...args) => {
            this.fireEvent(File.EVENT_UPLOADSTART, ...args);
        };

        _wrap.onprogress = (rpe, xhr) => {
            // percent for each bar

            // fileSize is -1 only if browser does not support file info access
            // this if splits recent browsers from others
            if (_wrap.file.fileSize !== -1) {
                // simulation property indicates when the progress event is fake
                if (rpe.simulation) {
                    // empty
                } else {
                    // empty
                }
            } else {
                // if fileSIze is -1 browser is using an iframe because it does
                // not support
                // files sent via Ajax (XMLHttpRequest)
                // We can still show some information
            }
            this.fireEvent(File.EVENT_PROGRESS, {
                file: this.file,
                total: rpe.total,
                loaded: rpe.loaded,
                simulation: rpe.simulation,
            });
        };

        // generated if there is something wrong during upload
        _wrap.onerror = () => {
            // just inform the user something was wrong
            this.fireEvent(File.EVENT_ERROR);
        };

        // generated when every file has been sent (one or more, it does not
        // matter)
        _wrap.onload = (rpe, xhr) => {
            // just show everything is fine ...
            // ... and after a second reset the component
            setTimeout(() => {
                _wrap.clean(); // remove files from list
                _wrap.hide(); // hide progress bars and enable input file
                // enable again the submit button/element
            }, 100);
            if (200 > xhr.status || xhr.status > 399) {
                Msg.toast(i18nText("BI-Upload_File_Error"), { level: "error" });
                this.fireEvent(File.EVENT_ERROR);

                return;
            }
            const error = some(_wrap.attach_array, (index, attach) => {
                if (attach.errorCode) {
                    Msg.toast(i18nText(attach.errorMsg), { level: "error" });
                    this.fireEvent(File.EVENT_ERROR, attach);

                    return true;
                }
            });
            !error && this.fireEvent(File.EVENT_UPLOADED);
        };
        _wrap.url = url;
        _wrap.fileType = accept; // 文件类型限制
        _wrap.attach_array = [];
        _wrap.attach_names = [];
        _wrap.attachNum = 0;
    }

    _events(wrap) {
        const { maxLength, errorText } = this.options;
        const callback = () => {
            event.del(wrap.dom.input, "change", callback);
            const input = wrap.dom.input.cloneNode(true);
            const files = F(wrap.dom.input);
            if (maxLength !== -1 && maxLength < files.length) {
                this.fireEvent(File.EVENT_ERROR, {
                    errorType: 2,
                });
            } else {
                for (let i = 0; i < files.length; i++) {
                    const item = files.item(i);
                    const tempFile = item.value || item.name;
                    const value = item.fileName || (item.fileName = tempFile.split("\\").pop()),
                        size = item.fileSize || item.size;
                    const validateFileType = fileTypeValidate(value, wrap.fileType);
                    if (!validateFileType) {
                        // 文件类型不支持
                        Msg.toast(
                            errorText({
                                errorType: 0,
                                file: item,
                            }) || i18nText("BI-Upload_File_Type_Error", wrap.fileType),
                            { level: "error" }
                        );
                        this.fireEvent(File.EVENT_ERROR, {
                            errorType: 0,
                            file: item,
                        });
                    } else if (wrap.maxSize !== -1 && size && wrap.maxSize < size) {
                        // 文件大小不支持
                        Msg.toast(
                            errorText({
                                errorType: 1,
                                file: item,
                            }) || i18nText("BI-Upload_File_Size_Error", Math.ceil(wrap.maxSize / 1024 / 1024)),
                            { level: "error" }
                        );
                        this.fireEvent(File.EVENT_ERROR, {
                            errorType: 1,
                            file: item,
                        });
                    } else {
                        wrap.files.unshift(item);
                    }
                }
            }
            wrap.files.length > 0 &&
                this.fireEvent(File.EVENT_CHANGE, {
                    files: wrap.files,
                });
            input.value = "";
            wrap.dom.input.parentNode.replaceChild(input, wrap.dom.input);
            wrap.dom.input = input;
            event.add(wrap.dom.input, "change", callback);
        };
        event.add(wrap.dom.input, "change", callback);

        return wrap;
    }

    _wrap() {
        const { multiple, maxSize, maxLength } = this.options;
        // be sure input accept multiple files
        const input = this.element[0];
        if (multiple === true) {
            this.element.attr("multiple", "multiple");
        }
        input.value = "";

        // wrap Object
        return this._events({
            // DOM namespace
            dom: {
                input, // input file
                disabled: false, // internal use, checks input file state
            },
            name: input.name, // name to send for each file ($_FILES[{name}] in the server)
            // maxSize is the maximum amount of bytes for each file
            maxSize: maxSize ? maxSize >> 0 : -1,
            maxLength,
            files: [], // file list

            // remove every file from the noswfupload component
            clean() {
                this.files = [];
            },

            // upload one file a time (which make progress possible rather than all files in one shot)
            // the handler is an object injected into the wrap one, could be the wrap itself or
            // something like {onload:function(){alert("OK")},onerror:function(){alert("Error")}, etc ...}
            upload(handler) {
                if (handler) {
                    for (const key in handler) {
                        this[key] = handler[key];
                    }
                }
                sendFiles(this, this.maxSize);

                return this;
            },

            // hide progress bar (total + current) and enable files selection
            hide() {
                if (this.dom.disabled) {
                    this.dom.disabled = false;
                    this.dom.input.removeAttribute("disabled");
                }
            },

            // show progress bar and disable file selection (used during upload)
            // total and current are pixels used to style bars
            // totalProp and currentProp are properties to change, "height" by default
            show(total, current, totalProp, currentProp) {
                if (!this.dom.disabled) {
                    this.dom.disabled = true;
                    this.dom.input.setAttribute("disabled", "disabled");
                }
            },
        });
    }

    setUrl(v) {
        this.options.url = v;
        if (this.wrap) {
            this.wrap.url = v;
        }
    }

    setMaxFileLength(v) {
        this.options.maxLength = v;
        if (this.wrap) {
            this.wrap.maxLength = v;
        }
    }

    select() {
        this.wrap && Widget._renderEngine.createElement(this.wrap.dom.input).click();
    }

    upload(handler) {
        this.wrap && this.wrap.upload(handler);
    }

    getValue() {
        return this.wrap ? this.wrap.attach_array : [];
    }

    getQueue() {
        return this.wrap.files;
    }

    reset() {
        if (this.wrap) {
            this.wrap.attach_array = [];
            this.wrap.attach_names = [];
            this.wrap.attachNum = 0;
        }
    }

    sendFiles(files) {
        if (!this.wrap) return;

        this.wrap.dom.input.files = files;

        const event = new CustomEvent("change");

        this.wrap.dom.input.dispatchEvent(event);
    }

    _setEnable(enable) {
        super._setEnable(arguments);
        if (enable === true) {
            this.element.removeAttr("disabled");
        } else {
            this.element.attr("disabled", "disabled");
        }
    }
}