<template>
  <div>
    <!-- 图例 -->
    <div class="legend">
      <span class="item" v-for="item in legendList" :key="item.id">
        <span
          v-if="item.type === 1"
          class="block"
          :style="{ backgroundColor: item.color }"
        ></span>
        <span
          v-if="item.type === 2"
          class="line"
          :style="{ backgroundColor: item.color }"
        >
          <span
            class="line-block"
            :style="{ backgroundColor: item.color }"
          ></span>
        </span>
        {{ item.name }}</span
      >
    </div>
    <div id="main" :style="{ width: '100%', height: chartHeight + 'px' }"></div>
  </div>
</template>
<script>
import * as echarts from "echarts";
import { debounce } from "@/utils/debounce";
export default {
  name: "bmLineBar",
  data() {
    return {
      myChart: "",
      option: {
        color: [],
        // color: ["#8EF0AB", "#63BDFF", "#288AFF"],
        grid: {
          left: 100,
          right: 10,
          bottom: 30,
          top: 30,
        },
        tooltip: {
          trigger: "axis",
          axisPointer: {
            type: "cross",
            crossStyle: {
              color: "rgba(237,237,237,0.5)",
            },
          },
          formatter: function (params) {
            var res = `<span style='color:rgba(0,0,0,0.8)'>${params[0].name}</span>`;
            for (var i = 0, l = params.length; i < l; i++) {
              res +=
                "<br/>" +
                `<span style='display:inline-block;margin-right:4px;border-radius:10px;width:10px;height:10px;background-color:${params[i].color}'></span>` +
                `<span style='display:inline-block;width:150px;color:rgba(0,0,0,0.8);font-size:14px;'>${params[i].seriesName}</span>` +
                `<span style='color:rgba(0,0,0,0.48);font-size:14px;'>${params[i].value}</span>`;
            }
            return res;
          },
        },
        xAxis: {
          type: "category",
          data: [],
          axisTick: {
            show: false,
          },
          axisPointer: {
            type: "shadow",
          },
        },
        yAxis: {
          type: "value",
        },
        series: [],
      },
    };
  },
  props: {
    chartHeight: {
      type: Number,
      default: 300,
    },
    legendList: {
      type: Array,
      default: () => [],
    },
    chartMsg: {
      type: Object,
      default: () => {},
    },
  },
  watch: {
    chartHeight: {
      handler(newVal) {
        this.chartHeight = newVal;
      },
    },
    isOpen(val) {
      this.canvasReset();
    },
    chartMsg: {
      handler(newVal) {
        this.getMes();
      },
      deep: true,
    },
  },
  computed: {
    isOpen() {
      return this.$store.getters.sidebar.opened;
    },
  },
  mounted() {
    this.canvasReset();
    window.addEventListener("resize", this.canvasReset);
  },
  beforeDestroy() {
    if (this.chart) {
      this.myChart.dispose();
    }
  },
  destroyed() {
    window.removeEventListener("resize", this.canvasReset);
  },
  methods: {
    canvasReset() {
      debounce(() => {
        this.getMes();
      }, 500)();
    },
    getMes() {
      if (this.myChart) {
        this.myChart.dispose();
        this.myChart = "";
      }
      var chartDom = document.getElementById("main");
      this.myChart = echarts.init(chartDom);
      this.option.color = this.chartMsg.color;
      this.option.xAxis.data = this.chartMsg.xData;
      this.option.series = this.chartMsg.series;
      this.myChart.setOption(this.option);
    },
  },
};
</script>
<style lang="scss" scoped>
.legend {
  text-align: right;
  .item {
    display: inline-block;
    margin-right: 10px;
    font-size: 14px;
    color: #8c8c8c;
    .block {
      width: 10px;
      height: 10px;
      display: inline-block;
      margin-right: 4px;
    }
    .line {
      width: 10px;
      height: 10px;
      border-radius: 5px;
      display: inline-block;
      margin-right: 4px;
      position: relative;
      .line-block {
        position: absolute;
        width: 20px;
        height: 2px;
        left: -5px;
        top: 4px;
      }
    }
  }
}
</style>
