<template>
  <div class="upload-file">
    <el-upload
      multiple
      :action="uploadFileUrl"
      :before-upload="handleBeforeUpload"
      :file-list="fileList"
      :limit="limit"
      :on-error="handleUploadError"
      :on-exceed="handleExceed"
      :on-success="handleUploadSuccess"
      :on-change="uploadFile"
      :show-file-list="false"
      :headers="headers"
      class="upload-file-uploader"
      :class="fileList.length > 0 ? 'upload-file-upload' : ''"
      ref="fileUpload"
    >
      <!-- 上传按钮 -->
      <!-- <el-button size="mini" type="primary">选取文件</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> -->
      <div
        class="upLoad"
        v-if="upFile"
        :class="fileList.length > 0 ? 'none' : ''"
      >
        <div class="centend">
          <img :src="imgPngB" alt="" />
          <span>选择文件</span>
        </div>
      </div>
      <div
        class="upImage"
        v-if="upImage"
        :class="fileList.length > 0 ? 'none' : ''"
      >
        <div class="content">
          <img src="../../assets/images/home/upload.png" alt="" />
          <el-button size="mini" type="primary">上传图片</el-button>
        </div>
      </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.url"
        class="el-upload-list__item ele-upload-list__item-content"
        v-for="file in fileList"
      >
        <el-image
          v-if="fileExt == 'jpg' || fileExt == 'png'"
          fit="cover"
          src="https://cube.elemecdn.com/6/94/4d3ea53c084bad6931a56d5158a48jpeg.jpeg"
          :preview-src-list="Array.from(file.url)"
        >
        </el-image>
        <!--  :href="`${baseUrl}${file.url}`"
          :underline="false"
          target="_blank" -->
        <el-link v-else :underline="false">
          <el-tooltip
            class="item"
            effect="light"
            :content="file.showName"
            placement="top"
          >
            <span class="el-icon-document"> {{ file.showName }} </span>
          </el-tooltip>
        </el-link>

        <div class="ele-upload-list__item-content-action">
          <el-link :underline="false" @click="handleDelete(0)" type="danger"
            >删除</el-link
          >
        </div>
      </li>
    </transition-group>
  </div>
</template>

<script>
import { getToken } from "@/utils/auth";

export default {
  name: "FileUpload",
  props: {
    // 值
    value: [String, Object, Array],
    // 数量限制
    limit: {
      type: Number,
      default: 5,
    },
    upImage: {
      type: Boolean,
      default: false,
    },
    upFile: {
      type: Boolean,
      default: true,
    },
    // 大小限制(MB)
    fileSize: {
      type: Number,
      default: 5,
    },
    // 文件类型, 例如['png', 'jpg', 'jpeg']
    fileType: {
      type: Array,
      default: () => ["doc", "xls", "ppt", "txt", "pdf", "xlsx", "png", "jpg"],
    },
    // 是否显示提示
    isShowTip: {
      type: Boolean,
      default: true,
    },
    // 图片
    imgPng: {
      default: 0,
    },
  },
  mounted() {
    if (this.imgPng == 1) {
      this.imgPngB = require("@/assets/images/Transaction/upload.png");
    }
  },
  data() {
    return {
      number: 0,
      uploadList: [],
      baseUrl:
        process.env.VUE_APP_BASE_API == undefined
          ? location.origin + process.env.VUE_APP_URL
          : process.env.VUE_APP_BASE_API,
      uploadFileUrl:
         (process.env.VUE_APP_BASE_API == undefined
          ? location.origin + process.env.VUE_APP_URL
          : process.env.VUE_APP_BASE_API )+ "/common/uploadMinioonfile", // 上传文件服务器地址
      headers: {
        Authorization: "Bearer " + getToken(),
      },
      fileList: [],
      fileExt: "",
      imgPngB: require("../../assets/images/home/add.png"),
    };
  },
  watch: {
    value: {
      handler(val) {
        // console.log(val)
        if (val) {
          let temp = 1;
          // 首先将值转为数组
          const list = Array.isArray(val) ? val : this.value.split(",");
          // 然后将数组转为对象数组
          this.fileList = 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 [];
        }
      },
      deep: true,
      immediate: true,
    },
  },
  computed: {
    // 是否显示提示
    showTip() {
      return this.isShowTip && (this.fileType || this.fileSize);
    },
  },
  methods: {
    // 上传前校检格式和大小
    handleBeforeUpload(file) {
      // console.log("++++++++++++++++======================",file);
      // 校检文件类型
      if (this.fileType) {
        const fileName = file.name.split(".");
        const fileExt = fileName[fileName.length - 1]; //jpg
        this.fileExt = fileName[fileName.length - 1]; //jpg
        const isTypeOk = this.fileType.indexOf(fileExt) >= 0; //true
        if (!isTypeOk) {
          this.$modal.msgError(
            `文件格式不正确, 请上传${this.fileType.join("/")}格式文件!`
          );
          return false;
        }
      }
      // 校检文件大小
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          this.$modal.msgError(`上传文件大小不能超过 ${this.fileSize} MB!`);
          return false;
        }
      }
      this.$modal.loading("正在上传文件，请稍候...");
      this.number++;
      return true;
    },
    uploadFile(item) {
      // let imgsrc = URL.createObjectURL(item.raw);
      // console.log(imgsrc)
    },
    // 文件个数超出
    handleExceed() {
      this.$modal.msgError(`上传文件数量不能超过 ${this.limit} 个!`);
    },
    // 上传失败
    handleUploadError(err) {
      this.$modal.msgError("上传文件失败，请重试");
      this.$modal.closeLoading();
    },
    // 上传成功回调
    handleUploadSuccess(res, file, fileList) {
      if (res.code === 200) {
        this.uploadList.push({
          name: res.fileName,
          url: res.fileName,
          showName: res.originalFilename,
        });
        this.uploadedSuccessfully();
      } else {
        this.number--;
        this.$modal.closeLoading();
        this.$modal.msgError(res.msg);
        this.$refs.fileUpload.handleRemove(file);
        this.uploadedSuccessfully();
      }
    },
    // 删除文件
    handleDelete(index) {
      this.fileList.splice(index, 1);
      this.$emit("input", this.listToString(this.fileList));
    },
    // 上传结束处理
    uploadedSuccessfully() {
      if (this.number > 0 && this.uploadList.length === this.number) {
        this.fileList = this.fileList.concat(this.uploadList);
        this.uploadList = [];
        this.number = 0;
        this.$emit("input", this.listToString(this.fileList));
        this.$modal.closeLoading();
      }
    },
    // 获取文件名称
    // getFileName(name) {
    //   if (name.lastIndexOf("/") > -1) {
    //     return name.slice(name.lastIndexOf("/") + 1);
    //   } else {
    //     return "";
    //   }
    // },
    // 对象转成指定字符串分隔
    listToString(list, separator) {
      let strs = "";
      separator = separator || ",";
      for (let i in list) {
        strs += list[i].url + separator;
      }
      return strs != "" ? strs.substr(0, strs.length - 1) : "";
    },
  },
};
</script>

<style scoped lang="scss">
@import "@/assets/styles/utils.scss";

.upload-file {
  min-height: vh(50);
}
.upload-file-uploader {
  // margin-bottom: 5px;
  // overflow: hidden;
  // height: 0;
  // height: 100%;
  .upLoad {
    display: flex;
    align-items: center;
    justify-content: center;
    border: vw(1) solid #1e80eb;
    border-radius: vw(2);
    width: vw(313);
    height: vh(50);
    cursor: pointer;
    .centend {
      display: flex;
      align-items: center;
      img {
        width: vw(13);
        height: vw(13);
        margin-right: vw(10);
      }
      span {
        font-size: vb(14);
        font-family: Source Han Sans CN;
        font-weight: 400;
        color: #1e80eb;
        line-height: vh(50);
      }
    }
  }
  .upImage {
    display: flex;
    align-items: center;
    justify-content: center;
    width: vw(313);
    min-height: vh(143);
    background: url("../../assets/images/home/upload-bg.png");
    background-size: 100% 100%;
    .content {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      img {
        width: vw(35);
        height: vh(30);
        margin-bottom: vh(10);
      }
    }
  }
  .none {
    display: none;
  }
}
.upload-file-upload {
  display: none;
}
.el-image {
  width: vw(313);
  // min-height: vh(143);
}
.upload-file-list .el-upload-list__item {
  // border: 1px solid #e4e7ed;
  line-height: 2;
  // margin-bottom: 10px;
  // margin: 0;
  margin-top: vh(8);
  position: relative;
}
.upload-file-list .ele-upload-list__item-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: inherit;
}
.el-icon-document {
  width: vw(369);
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
}
.ele-upload-list__item-content-action .el-link {
  margin-right: 10px;
  margin-left: vw(10);
}
</style>
