<template>
  <div style="width: 100%; height: 100%;">
    <div ref="chart" style="width: 100%; height: 100%;"></div>
  </div>
</template>

<script>
import * as echarts from 'echarts';
import { investall } from '@/api/ManageApi/index';

export default {
  name: 'RingChart',
  props: {
    years: {
      type: String,
      default: new Date().getFullYear().toString()
    }
  },
  data() {
    return {
      functionnumber: 0,
      chartData: [
        { value: 54, name: '国企', itemStyle: { color: '#36C3FB' } },
        { value: 65, name: '民企', itemStyle: { color: '#5B76F9' } },
        { value: 32, name: '外企', itemStyle: { color: '#FAC858' } },
        { value: 32, name: '其他', itemStyle: { color: '#50DFB3' } },
      ],
    };
  },
  mounted() {
    this.getData();
  },
  watch: {
    years: {
      immediate: true,
      handler(newVal) {
        this.getData();
      }
    }
  },
  methods: {
    async getData() {
      const response = await investall({
        years: this.years,
      });
      if (response && response.code === 200 && response.data) {
        const totalCount = response.data.reduce((sum, item) => sum + item.count, 0);
        this.functionnumber = totalCount;
        this.chartData = this.processData(response.data);
        this.renderChart();
      } else {}
    },
    processData(data) {
      const names = ['国企', '民企', '外企', '其他'];
      const counts = data.map(item => item.count);
      const total = counts.reduce((sum, count) => sum + count, 0);
      
      return names.map((name, index) => ({
        value: counts[index] || 0,
        name: name,
        itemStyle: { color: ['#36C3FB', '#5B76F9', '#FAC858', '#50DFB3'][index] },
        percent: total > 0 ? ((counts[index] || 0) / total * 100).toFixed(2) : '0.00'
      }));
    },
    renderChart() {
      const chartDom = this.$refs.chart;
      const myChart = echarts.init(chartDom);
      const option = {
        tooltip: {
          trigger: 'item',
          formatter: ({name, value, percent}) => `${name}: ${value}个 (${percent}%)`
        },
        legend: {
          orient: 'vertical',
          right: '27.7%',
          top: 'center',
          itemGap: 18,
          formatter: function (name) {
            const item = this.chartData.find(item => item.name === name);
            return `${name} ${item.value}个`;
          }.bind(this)
        },
        graphic: [
          {
            type: 'text',
            left: '29%',
            top: '40%',
            style: {
              text: this.functionnumber.toString(),
              textAlign: 'center',
              fill: '#292C33',
              fontSize: 20,
              fontFamily: 'DINbold',
              fontWeight: '500'
            }
          },
          {
            type: 'text',
            left: '26%',
            top: '55%',
            style: {
              text: '项目总数',
              textAlign: 'center',
              fill: '#9E9E9E',
              fontSize: '0.68rem',
              fontFamily: 'alibold',
              fontWeight: '400'
            }
          }
        ],
        series: [
          {
            name: '项目分布',
            type: 'pie',
            radius: ['40%', '60%'],
            center: ['30%', '50%'],
            data: this.chartData,
            label: {
              show: false
            },
            emphasis: {
              itemStyle: {
                shadowBlur: 10,
                shadowOffsetX: 0,
                shadowColor: 'rgba(0, 0, 0, 0.5)'
              }
            }
          }
        ]
      };

      myChart.setOption(option);
    }
  }
};
</script>

<style scoped>
</style>