<template>
    <div class="app-file-upload">
      <el-row>
        <el-col v-if="rowPreview && files.length > 0" :span="12" class="app-file-upload__preview">
            <el-button size='mini' class="file__preview-btn" icon='el-icon-view' :disabled="disabled" @click="()=>{this.dialogVisible = true;}">{{$t('components.appfileupload.preview')}}<Badge :count="files.length" type="info"></Badge></el-button>
        </el-col>
        <el-col :span="(rowPreview && files.length > 0) ? 12 : 24" class="app-file-upload__upload">
          <el-upload
            :disabled="disabled || (!this.multiple && files.length > 0) || readonly"
            :file-list="files"
            :limit="multiple ? limit: 1"
            :accept="accept"
            :action="uploadUrl"
            :multiple="multiple"
            :headers="headers"
            :before-upload="beforeUpload"
            :before-remove="onRemove"
            :on-success="onSuccess"
            :on-error="onError"
            :on-preview="onDownload"
            :drag="isdrag"
            :show-file-list="!rowPreview"
            :on-exceed="handleExceed"
            >
              <el-button v-if="!isdrag" size='mini' icon='el-icon-upload' :disabled="disabled || (!this.multiple && files.length > 0) || readonly">{{$t('components.appfileupload.caption')}}</el-button>
            <i v-if="isdrag" class="el-icon-upload"></i>
            <div v-if="isdrag" class="el-upload__isdrag-text" v-html="$t('components.appfileupload.uploadtext')"></div>
          </el-upload>
        </el-col>
      </el-row>
      <modal width="80%" v-model="dialogVisible" footer-hide class-name='app-file-upload__modal'>
        <ul class="app-file-upload__modal__content">
          <li v-for="(file,index) in files" :key="index" class="app-file-upload__modal__item">
            <div>
              <el-image :src="getImgURLOfBase64(file)">
                  <div slot='error' class='item__image'>
                      <img src="@/assets/img/picture.png" style='width:100%;height:100%;'>
                  </div>
              </el-image>
              <div class='item__action' @mouseenter="()=>{showActions = true;}" @mouseleave="()=>{showActions = false;}">
                  <span v-show="showActions" class='item__action__download'>
                      <i class='el-icon-download' @click="onDownload(file)"></i>
                  </span>
                  <span v-show="showActions" :style="{ 'display': disabled? 'none' : 'inline-block' }" class='item__action__delete'>
                      <i class='el-icon-delete' @click="onRemove(file, files)"></i>
                  </span>
              </div>
            </div>
            <div class="item__caption">{{file.name}}</div>
          </li>
        </ul>
      </modal>
    </div>
  </template>

<script lang="ts">
import { Component, Vue, Prop, Watch } from 'vue-property-decorator';
import { AppServiceBase, getSessionStorage, Util, ImgurlBase64, Http } from 'ibiz-core';
import { getCookie } from 'qx-util';
import { Subject, Subscription } from 'rxjs';

@Component({
})
export default class AppFileUpload extends Vue {

    /**
     * 表单状态
     *
     * @type {Subject<any>}
     * @memberof AppFileUpload
     */
    @Prop() public formState?: Subject<any>

    /**
     * 是否忽略表单项书香值变化
     *
     * @type {boolean}
     * @memberof AppFileUpload
     */
    @Prop() public ignorefieldvaluechange?: boolean;

    /**
     * 是否支持拖拽
     *
     * @type {boolean}
     * @memberof AppFileUpload
     */
    @Prop() public isdrag?: boolean;

    /**
     * 是否多选
     *
     * @type {boolean}
     * @memberof AppFileUpload
     */
    @Prop({default: true}) public multiple?: boolean;

    /**
     * 最大允许上传个数
     *
     * @type {*}
     * @memberof AppFileUpload
     */
    @Prop({default: 9999}) public limit!: number;

    /**
     * 接受上传的文件类型
     *
     * @type {*}
     * @memberof AppFileUpload
     */
    @Prop({default: '*'}) public accept!: string;

    /**
     * 表单状态事件
     *
     * @private
     * @type {(Subscription | undefined)}
     * @memberof AppFileUpload
     */
    private formStateEvent: Subscription | undefined;

    /**
     * 表单数据
     *
     * @type {string}
     * @memberof AppFileUpload
     */
    @Prop() public data!: string;

    /**
     * 视图参数
     *
     * @type {*}
     * @memberof AppFormDRUIPart
     */
    @Prop() public viewparams!: any;

    /**
     * 视图上下文
     *
     * @type {*}
     * @memberof AppAutocomplete
     */
    @Prop() public context!: any;

    /**
     * 初始化值
     *
     * @type {*}
     * @memberof AppFileUpload
     */
    @Prop() public value?: any;

    /**
     * 数据值变化
     *
     * @param {*} newval
     * @param {*} val
     * @memberof AppFileUpload
     */
    @Watch('value')
    onValueChange(newval: any, val: any) {
        if (this.ignorefieldvaluechange) {
            return;
        }
        this.getParams();
        this.setFiles(newval);
        this.dataProcess();
    }

    /**
     * 所属表单项名称
     *
     * @type {string}
     * @memberof AppFileUpload
     */
    @Prop() public name!: string;

    /**
     * 是否禁用
     *
     * @type {boolean}
     * @memberof AppFileUpload
     */
    @Prop() public disabled?: boolean;

	/**
	 * 只读模式
	 * 
	 * @type {boolean}
	 */
	@Prop({default: false}) public readonly?: boolean;

    /**
     * 上传参数
     *
     * @type {*}
     * @memberof AppFileUpload
     */
    @Prop() public uploadparams?: any;

    /**
     * 下载参数
     *
     * @type {*}
     * @memberof AppFileUpload
     */
    @Prop() public exportparams?: any;

    /**
     * 上传文件路径
     *
     * @memberof AppFileUpload
     */
    public uploadUrl = AppServiceBase.getInstance().getAppEnvironment().BaseUrl + AppServiceBase.getInstance().getAppEnvironment().UploadFile;

    /**
     * 下载文件路径
     *
     * @memberof AppFileUpload
     */
    public downloadUrl = AppServiceBase.getInstance().getAppEnvironment().ExportFile;

    /**
     * 文件列表
     *
     * @memberof AppFileUpload
     */
    public files = [];

    /**
     * 上传params
     *
     * @type {Array<any>}
     * @memberof AppFileUpload
     */
    public upload_params: Array<any> = [];

    /**
     * 导出params
     *
     * @type {Array<any>}
     * @memberof AppFileUpload
     */
    public export_params: Array<any> = [];

    /**
     * 自定义数组
     *
     * @type {Array<any>}
     * @memberof AppFileUpload
     */
    public custom_arr: Array<any> = [];

    /**
     * 应用参数
     *
     * @type {*}
     * @memberof AppImageUpload
     */
    public appData: any;

    /**
     * 请求头
     * 
     * @type {*}
     * @memberof AppImageUpload 
     */
    public headers: any = {};

    /**
     * 设置files
     *
     * @private
     * @memberof AppFileUpload
     */
    private setFiles(value:any): void {
        if (value) {
          let _files = JSON.parse(value);
          if (Object.prototype.toString.call(_files)=='[object Array]') {
            this.files = _files;
          }
        } else {
            this.files = [];
        }
    }

    /**
     * 数据处理
     *
     * @private
     * @memberof AppFileUpload
     */
    private dataProcess(): void {
        let _url = `${AppServiceBase.getInstance().getAppEnvironment().BaseUrl}${AppServiceBase.getInstance().getAppEnvironment().UploadFile}`;
        if (this.upload_params.length > 0 ) {
            _url +='?';
            this.upload_params.forEach((item:any,i:any)=>{
                _url += `${Object.keys(item)[0]}=${Object.values(item)[0]}`;
                if(i<this.upload_params.length-1){
                    _url += '&';
                }
            })    
        }
        
        this.uploadUrl = _url;
        
        this.files.forEach((file: any) => {
            let url = `${this.downloadUrl}/${file.id}`;
            if (this.export_params.length > 0) {
                url +='?';
            this.export_params.forEach((item:any,i:any)=>{
                url += `${Object.keys(item)[0]}=${Object.values(item)[0]}`;
                if(i<this.export_params.length-1){
                    url += '&';
                }
            })
            }
            file.url = url;
        });
    }

    

    /**
     * vue 生命周期
     *
     * @memberof AppFileUpload
     */
    public created() {
        this.setHeaders();
        if (this.formState) {
            this.formStateEvent = this.formState.subscribe(($event: any) => {
                // 表单加载完成
                if (Object.is($event.type, 'load')) {
                    this.getParams();
                    this.setFiles(this.value);
                    this.dataProcess();
                }
            });
        }
    }

    /**
     * vue 生命周期
     *
     * @returns
     * @memberof AppFileUpload
     */
    public mounted() {
        this.appData = this.$store.getters.getAppData();
        this.getParams();
        this.setFiles(this.value);
        this.dataProcess();
    }

    /**
     * 设置请求头
     * 
     * @memberof AppFileUpload
     */
    public setHeaders(){
        if (AppServiceBase.getInstance().getAppEnvironment().SaaSMode) {
            let activeOrgData = getSessionStorage('activeOrgData');
            this.headers['srforgid'] = activeOrgData?.orgid;
            this.headers['srfsystemid'] = activeOrgData?.systemid;
            if(getSessionStorage("srfdynaorgid")){
                this.headers['srfdynaorgid'] = getSessionStorage("srfdynaorgid");
            }
        } else {
            if(getSessionStorage("srfdynaorgid")){
                this.headers['srfdynaorgid'] = getSessionStorage("srfdynaorgid");
            }
        }
        if (getCookie('ibzuaa-token')) {
            this.headers['Authorization'] = `Bearer ${getCookie('ibzuaa-token')}`;
        } else {
            // 第三方应用打开免登
            if (sessionStorage.getItem("srftoken")) {
                const token = sessionStorage.getItem('srftoken');
                this.headers['Authorization'] = `Bearer ${token}`;
            }
        }
    }

    /**
     *获取上传，导出参数
     *
     *@memberof AppFileUpload
     */
    public getParams(){
        let uploadparams: any = this.uploadparams ? JSON.parse(JSON.stringify(this.uploadparams)) : {};
        let exportparams: any = this.exportparams ? JSON.parse(JSON.stringify(this.exportparams)) : {};

        let upload_params: Array<string> = [];
        let export_params: Array<string> = [];
        let param:any = this.viewparams;
        let context:any = this.context;
        let _data:any = JSON.parse(this.data);

        if (uploadparams && Object.keys(uploadparams).length > 0) {
            upload_params = Util.computedNavData(_data,param,context,uploadparams);    
        }
        if (exportparams && Object.keys(exportparams).length > 0) {
            export_params = Util.computedNavData(_data,param,context,exportparams);
        }
        
        this.upload_params = [];
        this.export_params = [];

        for (const item in upload_params) {
            this.upload_params.push({
                [item]:upload_params[item]
            })
        }
        for (const item in export_params) {
            this.export_params.push({
                [item]:export_params[item]
            })
        }
    }

    /**
     * 组件销毁
     *
     * @memberof AppFileUpload
     */
    public destroyed(): void {
        if (this.formStateEvent) {
            this.formStateEvent.unsubscribe();
        }
    }

    /**
     * 文件上传缓存对象
     *
     * @memberof AppFileUpload
     */
    public uploadCache:any = {
      count: 0,
      cacheFiles: [],
    };

    /**
     * 上传之前
     *
     * @param {*} file
     * @memberof AppFileUpload
     */
    public beforeUpload(file: any) {
        if(this.imageOnly){
            const imageTypes = ["image/jpeg" , "image/gif" , "image/png" , "image/bmp"];
            const isImage = imageTypes.some((type: any)=> Object.is(type, file.type));
            if (!isImage) {
              this.$throw((this.$t('components.appfileupload.filetypeerrorinfo') as any),'beforeUpload');
              return false;
            }
        }
        if(this.pdfOnly && !Object.is(file.type,'application/pdf')){
            this.$throw((this.$t('components.appfileupload.notpdffiletype') as any),'beforeUpload');
            return false;
        }
        this.uploadCache.count++;
    }

    /**
     * 上传成功回调
     *
     * @param {*} response
     * @param {*} file
     * @param {*} fileList
     * @memberof AppFileUpload
     */
    public onSuccess(response: any, file: any, fileList: any) {
        if (!response) {
            return;
        }

        // 处理回调数据，并缓存
        let arr: Array<any> = [];
        if(response?.length > 0){
            for (let index = 0; index < response.length; index++) {
              const file = response[index];
              arr.push({ name: file.filename, id: file.fileid });
            }
        }else{
            arr.push({ name: response.filename, id: response.fileid });
        }
        this.uploadCache.cacheFiles.push(arr);
        this.uploadCache.count--;

        // 回调都结束后的处理
        if(this.uploadCache.count == 0){
          let result: any[] = [];
          // 添加已有的文件数据
          this.files.forEach((_file:any) => {
              result.push({name: _file.name, id: _file.id})
          });

          // 添加缓存的文件数据
          this.uploadCache.cacheFiles.forEach((item: any)=>{
              result.push(...item);
          });

          // 抛出值变更事件
          let value: any = result.length > 0 ? JSON.stringify(result) : null;
          this.$emit('formitemvaluechange', { name: this.name, value: value });
          // 清空缓存的文件数据
          this.uploadCache.cacheFiles = [];
        }
    }

    /**
     * 上传失败回调
     *
     * @param {*} error
     * @param {*} file
     * @param {*} fileList
     * @memberof AppFileUpload
     */
    public onError(error: any, file: any, fileList: any) {
        this.$throw(error,'onError');
    }

    /**
     * 删除文件
     *
     * @param {*} file
     * @param {*} fileList
     * @memberof AppFileUpload
     */
    public onRemove(file: any, fileList: any) {
        let arr: Array<any> = [];
        fileList.forEach((f: any) => {
            if (f.id != file.id) {
                arr.push({ name: f.name, id: f.id });
            }
        });
        let value: any = arr.length > 0 ? JSON.stringify(arr) : null;
        if(arr.length == 0){
            this.dialogVisible = false;
        }
        this.$emit('formitemvaluechange', { name: this.name, value: value });
    }

    /**
     * 下载文件
     *
     * @param {*} file
     * @memberof AppFileUpload
     */
    public onDownload(file: any) {
        const url = `${this.downloadUrl}/${file.id}`;
        this.DownloadFile(url,file);
    }

    /**
     * 是否只支持图片上传
     *
     * @type {boolean}
     * @memberof AppFileUpload
     */
    @Prop({default: false}) public imageOnly!: boolean;

    /**
     * 是否只支持pdf上传
     *
     * @type {boolean}
     * @memberof AppFileUpload
     */
    @Prop({default: false}) public pdfOnly!: boolean;

    /**
     * 是否开启行内预览
     *
     * @type {boolean}
     * @memberof AppFileUpload
     */
    @Prop({default: false}) public rowPreview!: boolean;

    /**
     * 是否开启行内预览
     *
     * @type {boolean}
     * @memberof AppFileUpload
     */
    public dialogVisible: boolean = false;
    /**
     * 是否开启行内预览
     *
     * @type {boolean}
     * @memberof AppFileUpload
     */
    public showActions: boolean = false;

    /**
     * 获取图片
     * 
     * @memberof AppFileUpload
     */
    public getImgURLOfBase64(file: any) {
        const url = `${this.downloadUrl}/${file.id}`;
        ImgurlBase64.getInstance().getImgURLOfBase64(url).then((res: any) => {
            this.$set(file,'ImgBase64',res);
        });
        return file.ImgBase64;
    }

    /**
     * 计算文件mime类型
     *
     * @param filetype 文件后缀
     * @memberof DiskFileUpload
     */
    public calcFilemime(filetype: string): string {
        let mime = "image/png";
        switch(filetype) {
            case ".wps":
            mime = "application/kswps";
            break;
            case ".doc":
            mime = "application/msword";
            break;
            case ".docx":
            mime = "application/vnd.openxmlformats-officedocument.wordprocessingml.document";
            break;
            case ".txt":
            mime = "text/plain";
            break;
            case ".zip":
            mime = "application/zip";
            break;
            case ".png":
            mime = "imgage/png";
            break;
            case ".gif":
            mime = "image/gif";
            break;
            case ".jpeg":
            mime = "image/jpeg";
            break;
            case ".jpg":
            mime = "image/jpeg";
            break;
            case ".rtf":
            mime = "application/rtf";
            break;
            case ".avi": 
            mime = "video/x-msvideo";
            break;
            case ".gz": 
            mime = "application/x-gzip";
            break;
            case ".tar": 
            mime = "application/x-tar";
            break;
        }
        return mime; 
    }

    /**
     * 下载文件
     *
     * @param item 下载文件
     * @memberof DiskFileUpload
     */
    public DownloadFile(url: string,file: any) {
        // 发送get请求
        Http.getHttp()({
            method: 'get',
            url: url,
            responseType: 'blob'
        }).then((response: any) => {
            if (!response || response.status != 200) {
                this.$throw(this.$t('components.appfileupload.downloaderror'));
                return;
            }
            // 请求成功，后台返回的是一个文件流
            if (response.data) {
                // 获取文件名
                const filename = file.name;
                const ext = '.' + filename.split('.').pop();
                let filetype = this.calcFilemime(ext);
                // 用blob对象获取文件流
                let blob = new Blob([response.data], {type: filetype});
                // 通过文件流创建下载链接
                var href = URL.createObjectURL(blob);
                // 创建一个a元素并设置相关属性
                let a = document.createElement('a');
                a.href = href;
                a.download = filename;
                // 添加a元素到当前网页
                document.body.appendChild(a);
                // 触发a元素的点击事件，实现下载
                a.click();
                // 从当前网页移除a元素
                document.body.removeChild(a);
                // 释放blob对象
                URL.revokeObjectURL(href);
            } else {
                this.$throw(this.$t('components.appfileupload.downloaderror'));
            }
        }).catch((error: any) => {
            console.error(error);
        });
    }

    /**
     * 处理多选超出
     *
     * @memberof AppFileUpload
     */
    public handleExceed(files: any, fileList: any) {
      this.$warning(`${this.$t('components.appfileupload.limitselect')} ${this.limit}`);
    }
}
</script>