<template>
  <div style="display: flex;">
    <div :id="chartId" style="width: 100%;height: 100%;" />
  </div>
</template>

<script>
import { BASE_BAR, BASE_LINE, HORIZONTAL_BAR, BASE_PIE, BASE_FUNNEL, BASE_RADAR, BASE_GAUGE, BASE_MAP } from '../chart/chart'
import { baseBarOption, stackBarOption, horizontalBarOption, horizontalStackBarOption } from '../chart/bar/bar'
import { baseLineOption, stackLineOption } from '../chart/line/line'
import { basePieOption, rosePieOption } from '../chart/pie/pie'
import { baseMapOption } from '../chart/map/map'
import { baseFunnelOption } from '../chart/funnel/funnel'
import { baseRadarOption } from '../chart/radar/radar'
import { baseGaugeOption } from '../chart/gauge/gauge'
// import eventBus from '@/components/canvas/utils/eventBus'
import { uuid } from 'vue-uuid'
import { geoJson } from '@/api/map/map'

export default {
  name: 'ChartComponent',
  props: {
    chart: {
      type: Object,
      required: true
    },
    filter: {
      type: Object,
      required: false,
      default: function() {
        return {}
      }
    }
  },
  data() {
    return {
      myChart: {},
      chartId: uuid.v1()
    }
  },
  watch: {
    chart: {
      handler(newVal, oldVla) {
        this.preDraw()
      },
      deep: true
    },
    resize() {
      this.drawEcharts()
    }
  },
  mounted() {
    this.preDraw()
  },
  destroyed() {
    this.myChart.dispose()
  },
  methods: {
    preDraw() {
      // 基于准备好的dom，初始化echarts实例
      // 渲染echart等待dom加载完毕,渲染之前先尝试销毁具有相同id的echart 放置多次切换仪表板有重复id情况
      new Promise((resolve) => { resolve() }).then(() => {
        //	此dom为echarts图标展示dom
        this.myChart = this.$echarts.getInstanceByDom(document.getElementById(this.chartId))
        if (!this.myChart) {
          this.myChart = this.$echarts.init(document.getElementById(this.chartId))
        }
        this.drawEcharts()
      })
    },
    drawEcharts() {
      const chart = this.chart
      let chart_option = {}
      // type
      if (chart.type === 'bar') {
        chart_option = baseBarOption(JSON.parse(JSON.stringify(BASE_BAR)), chart)
      } else if (chart.type === 'bar-stack') {
        chart_option = stackBarOption(JSON.parse(JSON.stringify(BASE_BAR)), chart)
      } else if (chart.type === 'bar-horizontal') {
        chart_option = horizontalBarOption(JSON.parse(JSON.stringify(HORIZONTAL_BAR)), chart)
      } else if (chart.type === 'bar-stack-horizontal') {
        chart_option = horizontalStackBarOption(JSON.parse(JSON.stringify(HORIZONTAL_BAR)), chart)
      } else if (chart.type === 'line') {
        chart_option = baseLineOption(JSON.parse(JSON.stringify(BASE_LINE)), chart)
      } else if (chart.type === 'line-stack') {
        chart_option = stackLineOption(JSON.parse(JSON.stringify(BASE_LINE)), chart)
      } else if (chart.type === 'pie') {
        chart_option = basePieOption(JSON.parse(JSON.stringify(BASE_PIE)), chart)
      } else if (chart.type === 'pie-rose') {
        chart_option = rosePieOption(JSON.parse(JSON.stringify(BASE_PIE)), chart)
      } else if (chart.type === 'funnel') {
        chart_option = baseFunnelOption(JSON.parse(JSON.stringify(BASE_FUNNEL)), chart)
      } else if (chart.type === 'radar') {
        chart_option = baseRadarOption(JSON.parse(JSON.stringify(BASE_RADAR)), chart)
      } else if (chart.type === 'gauge') {
        chart_option = baseGaugeOption(JSON.parse(JSON.stringify(BASE_GAUGE)), chart)
      }

      if (chart.type === 'map') {
        const customAttr = JSON.parse(chart.customAttr)
        if (!customAttr.areaCode) return

        let areaJson
        if ((areaJson = localStorage.getItem('areaJson' + customAttr.areaCode)) !== null) {
          this.initMapChart(areaJson, chart)
          return
        }
        geoJson(customAttr.areaCode).then(res => {
          this.initMapChart(res.data, chart)
          // localStorage最大容量只有5M，先取消缓存
          // localStorage.setItem('areaJson' + customAttr.areaCode, res.data)
        })
        return
      }
      this.myEcharts(chart_option)
    },
    initMapChart(geoJson, chart) {
      this.$echarts.registerMap('HK', geoJson)
      const base_json = JSON.parse(JSON.stringify(BASE_MAP))
      const chart_option = baseMapOption(base_json, chart)
      this.myEcharts(chart_option)
    },
    myEcharts(option) {
      // 指定图表的配置项和数据
      const chart = this.myChart
      setTimeout(chart.setOption(option, true), 500)
      window.onresize = function() {
        chart.resize()
      }
    },
    chartResize() {
      // 指定图表的配置项和数据
      const chart = this.myChart
      chart.resize()
    }
  }
}
</script>

<style scoped>

</style>
