<template>
  <div class="upload-file">
    <el-upload
      :action="uploadFileUrl"
      :before-upload="handleBeforeUpload"
      :file-list="fileList"
      :limit="limit"
      :multiple="limit>1"
      :on-error="handleUploadError"
      :on-exceed="handleExceed"
      :on-success="handleUploadSuccess"
      :show-file-list="showList"
      :data="data"
      :headers="headers"
      class="upload-file-uploader"
      ref="upload"
    >
      <!-- 上传按钮 -->
      <el-button :icon="loading ? 'el-icon-upload2':''" :size="size" type="primary" :loading="isLoading">{{text}}</el-button>
      <!-- 上传提示 -->
      <div class="el-upload__tip" slot="tip" v-if="showTip">
        请上传
        <template v-if="fileSize"> 大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b> </template>
        <template v-if="fileType"> 格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b> </template>
        的文件
      </div>
    </el-upload>

    <!-- 文件列表 -->
    <transition-group class="upload-file-list el-upload-list el-upload-list--text" name="el-fade-in-linear" tag="ul">
      <li :key="file.uid" class="el-upload-list__item ele-upload-list__item-content" v-for="(file, index) in list">
        <el-link :href="file.url" :underline="false" target="_blank">
          <span class="el-icon-document"> {{ getFileName(file.name) }} </span>
        </el-link>
        <div class="ele-upload-list__item-content-action">
          <el-link :underline="false" @click="handleDelete(index)" type="danger">删除</el-link>
        </div>
      </li>
    </transition-group>
  </div>
</template>

<script>
import { getToken } from "@/utils/token";
export default {
  props: {
    // 值
    value: [String, Object, Array],
    beforeMsg:{
      type: String,
      default:''
    },
    showList: {
      type: Boolean,
      default: false
    },
    url:{
      type: String,
      default: '/xboe/sys/xuploader/file/upload'
    },
    limit:{
      type:Number,
      default:1
    },
    dir:{
      type:String,
      default:'files'
    },
    text:{
      type:String,
      default:'选择文件并上传'
    },
    size:{
      type:String,
      default:'small'
    },
    // 大小限制(MB)
    fileSize: {
      type: Number,
      default: 1024,
    },
    scorm:{
      type:String,
      default:''
    },
    // 文件类型, 例如['png', 'jpg', 'jpeg']
    fileType: {
      type: Array,
      default: () => ["doc", "xls", "ppt","docx", "xlsx", "pptx","png","txt", "pdf","jpg","gif","bmp","mp4","mp3","zip"],
    },
    // 是否显示提示
    isShowTip: {
      type: Boolean,
      default: true
    },
    loading: {
      type: Boolean,
      default: false
    },
  },
  data() {
    return {
      uploadFileUrl: process.env.VUE_APP_BASE_API + this.url, // 上传的图片服务器地址
      headers: {
        'XBOE-Access-Token': getToken(),
      },
      isLoading:false,
      fileList: [],
      data:{
        dir:this.dir
      }
    };
  },
  mounted() {
    //计算是http还是https
    let urlPre=window.location.protocol;
    this.uploadFileUrl=urlPre+this.uploadFileUrl.substring(this.uploadFileUrl.indexOf(':')+1);
  },
  computed: {
    // 是否显示提示
    showTip() {
      return this.isShowTip && (this.fileType || this.fileSize);
    },
    // 列表
    list() {
      let temp = 1;
      if (this.value) {
        // 首先将值转为数组
        const list = Array.isArray(this.value) ? this.value : [this.value];
        // 然后将数组转为对象数组
        return list.map((item) => {
          if (typeof item === "string") {
            item = { name: item, url: item };
          }
          item.uid = item.uid || new Date().getTime() + temp++;
          return item;
        });
      } else {
        this.fileList = [];
        return [];
      }
    },
  },
  methods: {
    // 上传前校检格式和大小
    handleBeforeUpload(file) {
      if(this.beforeMsg){
        this.$message({message:this.beforeMsg,type:'error',offset:100})
        return false;
      }
      // 校检文件类型
      if (this.fileType) {
        let fileExtension = "";
        if (file.name.lastIndexOf(".") > -1) {
          fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
        }
        const isTypeOk = this.fileType.some((type) => {
          if (file.type.indexOf(type) > -1) return true;
          if (fileExtension && fileExtension.indexOf(type) > -1) return true;
          return false;
        });
        if (!isTypeOk) {
          //this.$message.error(`文件格式不正确, 请上传${this.fileType.join("/")}格式文件!`);
          this.$message({message:`文件格式不正确, 请上传${this.fileType.join("/")}格式文件!`,type:'error',offset:100})
          //this.$message.error(`文件格式不正确, 请上传${this.fileType.join("/")}格式文件!`);
          return false;
        }

        //console.log(this.scorm,fileExtension,'upload');
        if(this.scorm && this.scorm==fileExtension){
           this.data.dir="scorm";
        }
        //console.log(this.data,'this.data');

      }
      // 校检文件大小
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          this.$message({message:`上传文件大小不能超过 ${this.fileSize} MB!`,type:'error',offset:100})
          //this.$message.error(`上传文件大小不能超过 ${this.fileSize} MB!`);
          return false;
        }
      }

      if(this.loading) {
        this.isLoading = true;
      }
      return true;
    },
    // 文件个数超出
    handleExceed(res) {
      this.$message({message:`一次性最多上传${this.limit}个文件`,type:'error',offset:100});
    },
    // 上传失败
    handleUploadError(err) {
      this.isLoading = false;
      this.$message({message:"上传失败, 请重试",type:'error',offset:100});
    },
    // 上传成功回调
    handleUploadSuccess(res, file,fileList) {
      if(res.status == 200) {
        //this.fileList = [];
        //console.log(file,'file');
        //console.log(fileList,'fileList');
        this.isLoading = false;
        this.$message({message:"上传成功",type:'success',offset:100});
        let delIdx=-1;
        fileList.some((fl,flIndx)=>{
          if(fl.uid==file.uid){
             delIdx=flIndx;
             return true;
          }else{
            return false;
          }
        });
        if(delIdx>-1){
          fileList.splice(delIdx,1);
        }
      } else {
        this.isLoading = false;
        //this.fileList = [];
        this.$message({message:"上传失败",type:'error',offset:100});
      }

      this.$emit("success", res);
    },
    // 删除文件
    handleDelete(index) {
      this.fileList.splice(index, 1);
      this.$emit("remove", '');
    },
    // 获取文件名称
    getFileName(name) {
      if (name.lastIndexOf("/") > -1) {
        return name.slice(name.lastIndexOf("/") + 1).toLowerCase();
      } else {
        return "";
      }
    }
  },
  created() {

    this.fileList = this.list;
  },
};
</script>

<style scoped lang="scss">
.upload-file-uploader {
  margin-bottom: 5px;
}
.upload-file-list .el-upload-list__item {
  border: 1px solid #e4e7ed;
  line-height: 2;
  margin-bottom: 10px;
  position: relative;

}
.upload-file-list .ele-upload-list__item-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: inherit;

}
.ele-upload-list__item-content-action .el-link {
  margin-right: 10px;
}
</style>
