<template>
  <custom-echart-bar :chart-data="state.data" height="100%" :option="state.option" />
</template>
<script setup>
import { reactive, watch } from 'vue';
import { isEmpty } from '@/utils';

const props = defineProps({
  data: {
    type: Array,
    default: () => [],
  },
});

const state = reactive({
  total: 0, // 存储所有乡镇面积总和
  option: {
    grid: {
      left: '5%',
      right: '5%',
      bottom: '5%',
      top: '10%',
      containLabel: true,
    },
    tooltip: {
      trigger: 'axis',
      axisPointer: {
        type: 'shadow',
      },
      backgroundColor: 'rgba(0,0,0,0.5);',
      borderColor: '#35d0c0',
      borderRadius: 8,
      formatter: (data) => {
        const params = data[0];
        const percentage = ((params.value / state.total) * 100).toFixed(2);
        return `<div class="custom-echarts-tips" >
          <span>${params.name}</span><br/>
          <span>${params.marker} ${params.data} km²</span><br/>
          <span>占比 ${percentage}%</span>
        </div>`;
      },
      extraCssText: 'backdrop-filter: blur(8px);',
    },
    barStyle: {
      barWidth: 16,
      itemStyle: {
        borderRadius: 8,
      },
      color: {
        type: 'linear',
        x: 0,
        y: 0,
        x2: 0,
        y2: 1,
        colorStops: [
          { offset: 0, color: '#35d0c0' },
          { offset: 1, color: 'rgba(53,208,192,0)' },
        ],
        global: false,
      },
    },
    xAxis: {
      type: 'category',
      axisTick: {
        show: false,
        alignWithLabel: false,
        interval: 'auto',
        inside: false,
        length: 5,
        lineStyle: {
          type: 'solid',
          width: 1,
          color: 'rgba(28, 158, 222, 1)',
        },
      },
    },
    yAxis: {
      type: 'value',
      // name: '面积(万亩)',
    },
  },
  data: [],
});

watch(
  () => props.data,
  (val) => {
    if (!isEmpty(val)) {
      state.data = val;
      state.total = val.reduce((sum, item) => sum + item.value, 0); // 计算总和
    }
  },
  {
    deep: true,
    immediate: true,
  }
);
</script>
