<template>
  <div class="upload-container">
  <!--  <el-button icon="el-icon-upload" size="mini" type="primary" @click="dialogVisible=true">
      上传图片
    </el-button> -->
    <el-dialog :visible.sync="dialogVisible" :modal="false" @close="canceldialogVisible">
      <el-upload
        :multiple="true"
        :file-list="fileList"
        :show-file-list="true"
        :on-remove="handleRemove"
        :on-success="handleSuccess"
        :before-upload="beforeUpload"
        class="editor-slide-upload"
        :action="action"
        list-type="picture-card"
      >
        <el-button size="small" type="primary">
          点击上传
        </el-button>
      </el-upload>
      <el-button @click="canceldialogVisible">
        取消
      </el-button>
      <el-button type="primary" @click="handleSubmit">
        确认
      </el-button>
    </el-dialog>
  </div>
</template>

<script>

import { Message } from 'element-ui'

export default {
  name: 'EditorSlideUpload',
  props: {
    show:{
      type:Boolean,
      default:false
    }
  },
  data() {
    return {
      action:`${process.env.VUE_APP_BASE_API}api/admin/upload-file`,
      dialogVisible: this.show,
      listObj: {},
      fileList: []
    }
  },
  watch:{
    show(val){
      this.dialogVisible = val
    }
  },
  methods: {
    checkAllSuccess() {
      return Object.keys(this.listObj).every(item => this.listObj[item].hasSuccess)
    },
    handleSubmit() {
      const arr = Object.keys(this.listObj).map(v => this.listObj[v])
      if (!this.checkAllSuccess()) {
        this.$message('请等待所有图片上传成功。如有网络问题，请刷新页面重新上传!')
        return
      }
      this.$emit('successCBK', arr)
      this.listObj = {}
      this.fileList = []
      this.dialogVisible = false
      this.$emit('updateshow',this.dialogVisible)
      // this.show = false
    },
    canceldialogVisible(){
      this.dialogVisible = false
      this.$emit('updateshow',this.dialogVisible)
    },
    handleSuccess(response, file) {
      const uid = file.uid
      const objKeyArr = Object.keys(this.listObj)
      for (let i = 0, len = objKeyArr.length; i < len; i++) {
        if (this.listObj[objKeyArr[i]].uid === uid) {
          this.listObj[objKeyArr[i]].url = response.url
          this.listObj[objKeyArr[i]].hasSuccess = true
          return
        }
      }
    },
    handleRemove(file) {
      const uid = file.uid
      const objKeyArr = Object.keys(this.listObj)
      for (let i = 0, len = objKeyArr.length; i < len; i++) {
        if (this.listObj[objKeyArr[i]].uid === uid) {
          delete this.listObj[objKeyArr[i]]
          return
        }
      }
    },
    beforeUpload(file) {
      console.log(file)
      if((file.size/1000) > 1024){
        Message({
          type:'warning',
          message:'上传图片大小超过1M！'
        })
        return false
      }
      const _self = this
      const _URL = window.URL || window.webkitURL
      const fileName = file.uid
      this.listObj[fileName] = {}
      return new Promise((resolve, reject) => {
        const img = new Image()
        img.src = _URL.createObjectURL(file)
        img.onload = function() {
          _self.listObj[fileName] = { hasSuccess: false, uid: file.uid, width: this.width, height: this.height }
        }
        resolve(true)
      })
    }
  }
}
</script>

<style lang="scss" scoped>
.editor-slide-upload {
  margin-bottom: 20px;
  ::v-deep .el-upload--picture-card {
    width: 100%;
  }
}
</style>
