<template>
  <div class="chart" :id="id"></div>
</template>

<script>
import util from "@/helper/util.js";
import partten from "@/helper/partten.js";
import * as echarts from "echarts";

export default {
  name: "radar-chart",
  componentName: "radar-chart",
  props: {
    // 宽度 默认9.722vh
    width: {
      type: String,
      default: "100%",
    },
    // 高度 默认9.722vh
    height: {
      type: String,
      default: "7.4074vh",
    },
    // 标题
    title: {
      type: String,
      default: "标题",
    },
    // 值
    value: {
      type: Object,
      default: () => {
        return {
          indicator: ["N0", "N1", "N2", "N3", "N4", "N5"],
          data: [
            {
              value: [44200, 14200, 20000, 35000, 50000, 38000],
              name: "NAME",
            },
          ],
        };
      },
    },
  },
  data() {
    return {
      id: "",
      chart: null,
      lineStyles: [
        {
          areaStyle: {
            color: "rgba(75,85,174, 0.9)",
          },
          lineStyle: {
            color: "rgba(255,255,255, 0.85)",
          },
          itemStyle: {
            color: "rgba(75,85,174, 0.5)",
            borderColor: "rgba(255,255,255, 0.5)",
            borderWidth: 0.5,
          },
        },
      ],
    };
  },
  computed: {},
  methods: {
    initChart() {
      let maxValue = -1;
      this.value.data.forEach((item, index) => {
        item.value.forEach((value) => {
          if (value > maxValue) {
            maxValue = value;
          }
        });
        item.areaStyle = this.lineStyles[index % this.lineStyles.length].areaStyle;
        item.lineStyle = this.lineStyles[index % this.lineStyles.length].lineStyle;
        item.itemStyle = this.lineStyles[index % this.lineStyles.length].itemStyle;
      });
      maxValue *= 1.5;
      let indicator = [];
      this.value.indicator.forEach((item) => {
        indicator.push({ name: item, max: maxValue });
      });
      let option = {
        grid: {
          left: 0,
          right: 0,
          bottom: 0,
          top: 0,
        },
        radar: [
          // 最低层 90
          {
            radius: "90%",
            center: ["50%", "50%"],
            splitNumber: 1,
            nameGap: "10",
            name: {
              show: false,
              textStyle: {
                color: partten.getColor("gray") + 99,
                fontSize: 12,
              },
            },
            axisLine: {
              lineStyle: {
                color: partten.getColor("gray") + 40,
              },
            },
            splitLine: {
              lineStyle: {
                width: 1,
                color: partten.getColor("gray") + 40,
              },
            },
            splitArea: {
              areaStyle: {
                color: "transparent",
              },
            },
            indicator: indicator,
          },
          // 次外层 80 - 90
          {
            radius: ["80%", "90%"],
            center: ["50%", "50%"],
            startAngle: 90,
            splitNumber: 2,
            name: {
              show: false,
            },
            axisLine: {
              lineStyle: {
                color: partten.getColor("gray") + 40,
                shadowBlur: 1,
                shadowColor: "#fff",
                shadowOffsetX: 0.5,
                shadowOffsetY: 1,
              },
            },
            splitLine: {
              lineStyle: {
                width: 1,
                color: partten.getColor("gray") + 40,
                shadowColor: "#fff",
                shadowBlur: 0,
                shadowOffsetX: 0.5,
                shadowOffsetY: 0.5,
              },
            },
            splitArea: {
              areaStyle: {
                color: "transparent",
              },
            },
            indicator: indicator,
          },
          // 渐变层 40 - 80
          {
            radius: ["40%", "80%"],
            center: ["50%", "50%"],
            splitNumber: 1,
            name: {
              show: false,
            },
            axisLine: {
              lineStyle: {
                color: partten.getColor("gray") + 40,
              },
            },
            splitLine: {
              lineStyle: {
                width: 1,
                color: partten.getColor("gray"),
              },
            },
            splitArea: {
              areaStyle: {
                shadowBlur: 4,
                color: {
                  type: "radial",
                  x: 0.5,
                  y: 0.5,
                  r: 0.5,
                  colorStops: [
                    {
                      offset: 0.5,
                      color: "transparent", // 0% 处的颜色
                    },
                    {
                      offset: 1,
                      color: partten.getColor("green") + 60, // 100% 处的颜色
                    },
                  ],
                  global: false, // 缺省为 false
                },
              },
            },
            indicator: indicator,
          },
          // 渐变层 0 - 40
          {
            radius: ["0%", "40%"],
            center: ["50%", "50%"],
            splitNumber: 1,
            name: {
              show: false,
            },
            axisLine: {
              lineStyle: {
                color: partten.getColor("gray") + 40,
              },
            },
            splitLine: {
              lineStyle: {
                width: 1,
                color: partten.getColor("gray"),
              },
            },
            splitArea: {
              areaStyle: {
                shadowBlur: 4,
                color: {
                  type: "radial",
                  x: 0.5,
                  y: 0.5,
                  r: 0.5,
                  colorStops: [
                    {
                      offset: 0.5,
                      color: "transparent", // 0% 处的颜色
                    },
                    {
                      offset: 1,
                      color: partten.getColor("green") + 60, // 100% 处的颜色
                    },
                  ],
                  global: false, // 缺省为 false
                },
              },
            },
            indicator: indicator,
          },
          // 内层 0 - 50
          {
            radius: "50%",
            center: ["50%", "50%"],
            splitNumber: 1,
            name: {
              show: false,
            },
            axisLine: {
              lineStyle: {
                color: partten.getColor("gray") + 40,
              },
            },
            splitLine: {
              lineStyle: {
                width: 1,
                color: partten.getColor("gray"),
              },
            },
            splitArea: {
              areaStyle: {
                shadowBlur: 4,
                color: "transparent",
              },
            },
            indicator: indicator,
          },
          // 内层 0 - 45
          {
            radius: "45%",
            center: ["50%", "50%"],
            splitNumber: 1,
            name: {
              show: false,
            },
            axisLine: {
              lineStyle: {
                color: partten.getColor("gray") + 40,
              },
            },
            splitLine: {
              lineStyle: {
                width: 1,
                color: partten.getColor("gray"),
              },
            },
            splitArea: {
              areaStyle: {
                shadowBlur: 4,
                color: "transparent",
              },
            },
            indicator: indicator,
          },
        ],
        series: [
          {
            name: this.title,
            type: "radar",
            data: this.value.data,
          },
        ],
      };

      this.chart.setOption(option);
    },
  },
  created() {
    this.id = "pie-chart-" + util.newGUID();
  },
  mounted() {
    this.$nextTick(() => {
      this.$el.style.width = this.width;
      this.$el.style.height = this.height;
      this.chart = echarts.init(this.$el);
      this.initChart();
    });
  },
  updated() {
    this.initChart();
  },
};
</script>

<style lang="less" scoped>
.chart {
  width: 100%;
  height: 100%;
  display: block;
  margin: auto;
}
</style>
