<template>
  <el-dialog
    :visible.sync="dialogFormVisible"
    :title="listQuery.devcode+'历史数据'"
    width="60%"
    append-to-body
    class="lineDialog"
  >
    <div style="margin-bottom: 10px">
      <el-date-picker
        v-model="timeRange"
        type="datetimerange"
        range-separator="至"
        value-format="yyyy-MM-dd HH:mm:ss"
        start-placeholder="开始时间"
        end-placeholder="结束时间"
        size="small"/>
      <el-button class="filter-item" type="primary" icon="el-icon-search" size="small" @click="fetchData">搜索</el-button>
      <!-- <el-button class="filter-item" type="primary" size="small" @click="exportData">导出</el-button> -->
    </div>
    <div v-loading="loading1">
      <div>
        <el-table :data="data" size="mini" height="380px" >
          <el-table-column label="上报时间" prop="logtime" align="center"/>
          <el-table-column label="瞬时流速(Nm/s)" prop="instantVelocity" align="center"/>
          <el-table-column label="瞬时流量(m³/h)" prop="instantFlow" align="center"/>
          <el-table-column label="介质温度(℃)" prop="ambocetorTemperture" align="center"/>
          <el-table-column label="累计流量(m³)" prop="totalFlow" align="center"/>
        </el-table>
      </div>
      <!--分页-->
      <div class="pagination-container">
        <el-pagination
          v-show="total>listQuery.limit"
          :current-page="listQuery.offset"
          :page-sizes="[20,30,50]"
          :page-size="listQuery.limit"
          :total="total"
          align="center"
          layout="total, sizes, prev, pager, next"
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"/>
      </div>
    </div>
  </el-dialog>
</template>

<script>
import { getDayTime } from '@/utils/dateutils'
import { totalDataGasFlow } from '@/api/device'
import { batchExportWaterHistory } from '@/api/data'

export default {
  name: 'GasFlowHistory',
  data() {
    return {
      total: 0, // 数据总数
      loading1: true,
      timeRange: [],
      dialogFormVisible: false, // 对话框是否显示
      listQuery: {
        offset: 1,
        limit: 20,
        devcode: '',
        beginTime: '',
        endTime: ''
      },
      data: []

    }
  },
  methods: {
    initDialog: function(dialogFormVisible, row = null) {
      console.log(row, '========row=====')
      this.listQuery.devcode = row.devcode
      this.dialogFormVisible = dialogFormVisible
      const beginTime = getDayTime(new Date().getTime() - 24 * 7 * 60 * 60 * 1000).Format('yyyy-MM-dd hh:mm:ss')
      const endTime = new Date().Format('yyyy-MM-dd hh:mm:ss')
      this.timeRange = [beginTime, endTime]
      this.fetchData() // 传row
    },
    // 改变页容量
    handleSizeChange(val) {
      this.listQuery.limit = val
      this.fetchData()
    },
    // 改变当前页
    handleCurrentChange(val) {
      this.listQuery.offset = val
      this.fetchData()
    },
    fetchData(isNowPage = true) {
      this.listLoading = true
      if (!isNowPage) { // 是否显示当前页，否则跳转第一页
        this.listQuery.offset = 1
      }
      this.loading1 = true
      if (this.timeRange && this.timeRange.length === 2) {
        this.listQuery.beginTime = this.timeRange[0]
        this.listQuery.endTime = this.timeRange[1]
      } else {
        this.listQuery.beginTime = ''
        this.listQuery.endTime = ''
      }
      totalDataGasFlow(this.listQuery).then(response => {
        this.data = response.data
        this.loading1 = false
      })
    },
    // 批量导出
    exportData() {
      console.log('批量导出液位配置')
      // 全屏加载动画
      const loading = this.$loading({
        lock: true,
        text: '数据处理中,请稍后...',
        spinner: 'el-icon-loading',
        background: 'rgba(0, 0, 0, 0.7)'
      })
      batchExportWaterHistory(this.listQuery).then((res) => {
        loading.close() // 关闭加载动画
        console.log('download===', res)
        const blob = new Blob([res.data])
        const downloadElement = document.createElement('a')
        const href = window.URL.createObjectURL(blob) // 创建下载的链接
        downloadElement.href = href
        downloadElement.download = `${this.listQuery.devcode}远程水表历史数据.xlsx` // 下载后文件名
        document.body.appendChild(downloadElement)
        downloadElement.click() // 点击下载
        document.body.removeChild(downloadElement) // 下载完成移除元素
        window.URL.revokeObjectURL(href) // 释放blob对象
      }).catch((res) => {
        loading.close()
      })
    }
  }
}
</script>
<style>
  .el-dialog__header {
    padding: 10px !important;
  }
  .el-dialog__body {
    padding: 10px !important;
  }

</style>