<template>
  <div class="chart-container">
    <div ref="chart" class="chart-body" />
  </div>
</template>

<script>
import echarts from 'echarts'
export default {
  name: 'StatisticsChart',
  props: {
    list: {
      type: Array,
      default() {
        return []
      }
    }
  },
  computed: {
    pieData() {
      const tmp = []
      this.list.forEach((item, index) => {
        const obj = {}
        obj.name = item.deptName
        obj.value = item.num
        tmp.push(obj)
      })
      return tmp
    }
  },
  watch: {
    list() {
      this.initChart()
    }
  },
  activated() {
    this.initChart()
  },
  methods: {
    initChart() {
      this.chart = echarts.init(this.$refs.chart)
      this.chart.setOption({
        tooltip: {
          show: true
        },
        color: [
          '#19d4ae', '#5ab1ef', '#fa6e86',
          '#ffb980', '#0067a6', '#c4b4e4',
          '#d87a80', '#9cbbff', '#d9d0c7',
          '#87a997', '#d49ea2', '#5b4947',
          '#7ba3a8'
        ],
        legend: {
          orient: 'vertical',
          right: 0,
          data: this.pieData.map(item => item.name)
        },
        series: [{
          name: '进出记录',
          type: 'pie',
          data: this.pieData,
          label: {
            show: true,
            formatter: '{b}记录数:{c}条'
          },
          tooltip: {
            formatter: '{b}<br/>记录数: {d}%,{c}条'
          }
        }]
      })
      this.chart.resize()
    }
  }
}
</script>

<style scoped>
.chart-container{
  text-align: center;
}
.chart-body{
  height: 60vh;
  width: 80%;
  margin-right: auto;
  margin-left: auto;
}
</style>