<template>
  <!-- 功能区 -->
  <div ref="chart" style="width: 30rem; height: 10rem;"></div>
</template>

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

export default {
  name: 'FunctionChart',
  data() {
    return {
      chartData: [
        { value: 54, name: '高端制造与国际贸易区', itemStyle: { color: '#36C3FB' } },
        { value: 65, name: '独墅湖科教创新区', itemStyle: { color: '#5B76F9' } },
        { value: 32, name: '阳澄湖半岛旅游度假区', itemStyle: { color: '#F08445' } },
        { value: 25, name: '金鸡湖商务区', itemStyle: { color: '#F6B600' } },
        { value: 15, name: '苏相合作区', itemStyle: { color: '#50DFB3' } }
      ]
    };
  },
  mounted() {
    this.getData();
  },
  methods: {
    async getData() {
      try {
        const response = await fungong();
        if (response && response.code === 200 && response.data) {
          this.chartData = this.processData(response.data);
          this.renderChart();
        } else {
          console.error('获取数据失败:', response);
        }
      } catch (error) {
        console.error('获取数据失败:', error);
      }
    },
    processData(data) { 
      const names = ['高端制造与国际贸易区', '独墅湖科教创新区', '阳澄湖半岛旅游度假区', '金鸡湖商务区', '苏相合作区'];
      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', '#F08445', '#F6B600', '#50DFB3'][index] },
        percent: ((counts[index] || 0) / total * 100).toFixed(2) 
      }));
    },
    renderChart() {
      const chartDom = this.$refs.chart;
      const myChart = echarts.init(chartDom);

      const option = {
        tooltip: {
          trigger: 'item',
          formatter: function (params) {
            return `${params.name}: ${params.value}个 (${params.percent}%)`;
          }
        },
        legend: {
          orient: 'vertical', // 图例垂直排列
          right: '0%', // 图例在右侧
          top: 'center', // 图例垂直居中
          itemGap: 15, // 右侧间隔
          formatter: function (name) {
            // 自定义图例显示格式
            const item = this.chartData.find(item => item.name === name);
            return `${name} ${item.value}个`;
          }.bind(this)
        },
        series: [
          {
            name: '项目分布',
            type: 'pie',
            radius: ['40%', '60%'],
            center: ['30%', '50%'],
            data: this.chartData,
            label: {
              show: false // 隐藏标签
            },
            emphasis: {
              itemStyle: {
                shadowBlur: 10,
                shadowOffsetX: 0,
                shadowColor: 'rgba(0, 0, 0, 0.5)'
              }
            }
          }
        ]
      };

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

<style scoped>

</style>