<template>
  <VueEcharts :options="options" autoresize style="width: 100%;height: 100%;"></VueEcharts>
</template>

<script>
import * as echarts from 'echarts'
import echartsMixin from "../mixins/echarts.mixin";
export default {
  name: "Bar",
  mixins: [echartsMixin],
  data () {
    return {
    }
  },
  computed: {
    options () {
      const { xAxis, dataObj } = this.translateData()
      return {
        xAxis: {
          type: 'category',
          axisLabel: {
            fontSize: 14,
            textStyle: {
              color: '#7da4d4',
            },
          },
          axisLine: {
            show: true,
            lineStyle: {
              color: ['#36537D'],
              type: 'solid',
            },
          },
          axisTick: {
            show: false,
          },
          splitLine: {
            show: false,
          },
          splitArea: {
            show: false,
          },
          data: xAxis
        },
        grid: {
          left: '0',
          right: '0',
          bottom: '3%',
          top: '15%',
          containLabel: true,
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            // 坐标轴指示器，坐标轴触发有效
            type: 'shadow', // 默认为直线，可选为：'line' | 'shadow'
          },
        },
        legend: {
          left: 'right',
          top: '4%',
          textStyle: {
            color: '#ffffff',
            fontSize: 14,
          },
          lineStyle: {
            width: 4
          }
        },
        yAxis: {
          type: 'value',
          show: true,
          minInterval: 1,
          splitNumber: 5,
          axisTick: {
            show: false,
          },
          axisLine: {
            show: false,
          },
          axisLabel: {
            fontSize: 14,
            textStyle: {
              color: '#7da4d4',
            },
          },
          splitLine: {
            show: true,
            lineStyle: {
              color: ['#36537D'],
              type: 'solid',
            },
          },
          splitArea: {
            show: false,
            areaStyle: {
              color: 'rgba(54,101,146,0.15)',
            },
          },
        },
        series: Object.keys(dataObj).map((item, attrIndex) => {
          const data = dataObj[item]
          const _data = data.map((datum, index) => {
            if (datum.name === xAxis[index]) {
              return datum.value
            }
            return null
          })
          const colors = this.colors[attrIndex]
          const [ startColor, endColor ] = colors
          return {
            barWidth: 6,
            type: 'bar',
            name: item,
            data: _data,
            itemStyle: {
              normal: {
                color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                  {
                    offset: 0,
                    color: this.hexToRgba(startColor || '#1EB5FF', '1'),
                  },
                  {
                    offset: 1,
                    color: this.hexToRgba(endColor || startColor || this.colors[attrIndex] || '#1EB5FF', '0.2'),
                  },
                ]),
              },
            },
          }
        })
      }
    }
  }
}
</script>

<style scoped>

</style>
