// 单文件上传及展示

<template>
  <div class="my-upload">
    <label>
      <el-button icon='el-icon-upload' size='mini' :loading='loading'>{{loading ? '上传中...' : tip}}</el-button>
      <input type="file" @change='chooseFile' :disabled="loading" ref="referenceUpload">
    </label>
    <div v-if='value' class='flex'>
      <div style="margin-right: 20px">
        <div v-if='type === "thumb"' class='thumb' :style="imgCover"></div>
        <div v-else>文件名: {{value}}</div>
      </div>
<!--      <div>
        <el-button icon="el-icon-delete" size='mini' plain @click='del'>删除</el-button>
      </div>-->
    </div>
  </div>
</template>

<script>
export default {
  props: {
    value: {
      type: String,
      default: '',
    },
    type: { // 展示类型，文件名或缩略图 filename | thumb
      type: String,
      default: 'filename',
    },
    tip: { // 按钮文字
      type: String,
      default: '上传文件',
    },
    prePath: {
      type: String,
      default: '',
    }
  },
  methods: {
    del() {
      this.$emit("input", "")
    },
    async chooseFile(e) {
      this.loading = true;
      console.log(e);
      try {
        const {code, url} = await this.$upload('file/upload', {
          uploadFile: e.target.files[0],
          prePath: this.prePath
        });
        if(code === 1) {
          this.$emit('input', url)
        }else{
          this.$message.error('上传文件失败');
        }
      } catch (error) {
        this.$message.error(error.message);
      }
      this.loading = false;
      this.$refs.referenceUpload.value = null;
    },
  },
  computed: {
    imgCover() {
      return `background-image: url(${this.value})`;
    }
  },
  data() {
    return {
      loading: false,
    }
  }
}
</script>

<style lang="less">
.my-upload{
  label{
    position: relative;
    input{
      display: block;
      position: absolute;
      width: 100%;
      height: 100%;
      left: 0;
      top: 0;
      opacity: 0;
    }
  }
  .thumb{
    width: 80px;
    height: 80px;
    background-size: contain;
    background-position: center center;
    background-repeat: no-repeat;
    border: 1px solid #ccc;
    border-radius: 5px;
    overflow: hidden;
  }
  p{
    color: #666;
    font-size: 14px;
  }
}
</style>