<template>
  <div :class="className" :style="{height:height,width:width}" />
</template>

<script>
import echarts from 'echarts'

require('echarts/theme/macarons') // echarts theme
import { debounce } from '@/utils'

export default {
  props: {
    className: {
      type: String,
      default: 'chart'
    },
    width: {
      type: String,
      default: '100%'
    },
    height: {
      type: String,
      default: '300px'
    }
  },
  data() {
    return {
      chart: null
    }
  },
  mounted() {
    this.initChart()
    this.__resizeHandler = debounce(() => {
      if (this.chart) {
        this.chart.resize()
      }
    }, 100)
    window.addEventListener('resize', this.__resizeHandler)
  },
  beforeDestroy() {
    if (!this.chart) {
      return
    }
    window.removeEventListener('resize', this.__resizeHandler)
    this.chart.dispose()
    this.chart = null
  },
  methods: {
    initChart() {
      this.chart = echarts.init(this.$el, 'macarons')
      const data = [
        [[28604, 77, 17096869, 'Australia', 1990], [31163, 77.4, 27662440, 'Canada', 1990], [1516, 68, 1154605773, 'China', 1990], [13670, 74.7, 10582082, 'Cuba', 1990], [28599, 75, 4986705, 'Finland', 1990], [29476, 77.1, 56943299, 'France', 1990], [31476, 75.4, 78958237, 'Germany', 1990], [28666, 78.1, 254830, 'Iceland', 1990], [1777, 57.7, 870601776, 'India', 1990], [29550, 79.1, 122249285, 'Japan', 1990], [2076, 67.9, 20194354, 'North Korea', 1990], [12087, 72, 42972254, 'South Korea', 1990], [24021, 75.4, 3397534, 'New Zealand', 1990], [43296, 76.8, 4240375, 'Norway', 1990], [10088, 70.8, 38195258, 'Poland', 1990], [19349, 69.6, 147568552, 'Russia', 1990], [10670, 67.3, 53994605, 'Turkey', 1990], [26424, 75.7, 57110117, 'United Kingdom', 1990], [37062, 75.4, 252847810, 'United States', 1990]],
        [[44056, 81.8, 23968973, 'Australia', 2015], [43294, 81.7, 35939927, 'Canada', 2015], [13334, 76.9, 1376048943, 'China', 2015], [21291, 78.5, 11389562, 'Cuba', 2015], [38923, 80.8, 5503457, 'Finland', 2015], [37599, 81.9, 64395345, 'France', 2015], [44053, 81.1, 80688545, 'Germany', 2015], [42182, 82.8, 329425, 'Iceland', 2015], [5903, 66.8, 1311050527, 'India', 2015], [36162, 83.5, 126573481, 'Japan', 2015], [1390, 71.4, 25155317, 'North Korea', 2015], [34644, 80.7, 50293439, 'South Korea', 2015], [34186, 80.6, 4528526, 'New Zealand', 2015], [64304, 81.6, 5210967, 'Norway', 2015], [24787, 77.3, 38611794, 'Poland', 2015], [23038, 73.13, 143456918, 'Russia', 2015], [19360, 76.5, 78665830, 'Turkey', 2015], [38225, 81.4, 64715810, 'United Kingdom', 2015], [53354, 79.1, 321773631, 'United States', 2015]]
      ]
      this.chart.setOption({
        title: {
          text: '1990 与 2015 年各国家人均寿命与 GDP'
        },
        legend: {
          right: 10,
          data: ['1990', '2015']
        },
        xAxis: {
          splitLine: {
            lineStyle: {
              type: 'dashed'
            }
          }
        },
        yAxis: {
          splitLine: {
            lineStyle: {
              type: 'dashed'
            }
          },
          scale: true
        },
        series: [{
          name: '1990',
          data: data[0],
          type: 'scatter',
          symbolSize: function(data) {
            return Math.sqrt(data[2]) / 5e2
          },
          label: {
            emphasis: {
              show: true,
              formatter: function(param) {
                return param.data[3]
              },
              position: 'top'
            }
          },
          itemStyle: {
            normal: {
              shadowBlur: 10,
              shadowColor: 'rgba(120, 36, 50, 0.5)',
              shadowOffsetY: 5,
              color: new echarts.graphic.RadialGradient(0.4, 0.3, 1, [{
                offset: 0,
                color: 'rgb(251, 118, 123)'
              }, {
                offset: 1,
                color: 'rgb(204, 46, 72)'
              }])
            }
          }
        }, {
          name: '2015',
          data: data[1],
          type: 'scatter',
          symbolSize: function(data) {
            return Math.sqrt(data[2]) / 5e2
          },
          label: {
            emphasis: {
              show: true,
              formatter: function(param) {
                return param.data[3]
              },
              position: 'top'
            }
          },
          itemStyle: {
            normal: {
              shadowBlur: 10,
              shadowColor: 'rgba(25, 100, 150, 0.5)',
              shadowOffsetY: 5,
              color: new echarts.graphic.RadialGradient(0.4, 0.3, 1, [{
                offset: 0,
                color: 'rgb(129, 227, 238)'
              }, {
                offset: 1,
                color: 'rgb(25, 183, 207)'
              }])
            }
          }
        }]
      })
    }
  }
}
</script>
