<template>
  <div ref="chartContainer" class="line-chart-container"></div>
</template>

<script setup lang="ts">
import { ref, onMounted, onBeforeUnmount, watch } from 'vue'
import * as echarts from 'echarts'

// 定义组件属性
interface Props {
  chartData?: Array<{ name: string; value: number }>
  title?: string
  color?: string
}

const props = withDefaults(defineProps<Props>(), {
  chartData: () => [],
  title: '',
  color: '#1296db'
})

// 图表容器引用和实例
const chartContainer = ref<HTMLDivElement | null>(null)
let chartInstance: echarts.ECharts | null = null

// 初始化图表
const initChart = () => {
  if (chartContainer.value) {
    chartInstance = echarts.init(chartContainer.value)
    updateChart()
  }
}

// 更新图表
const updateChart = () => {
  if (!chartInstance || !props.chartData.length) return

  const option = {
    title: {
      // text: props.title,
      textStyle: {
        color: '#fff',
        fontSize: 14
      },
      left: 'center'
    },
    tooltip: {
      trigger: 'axis',
      backgroundColor: 'rgba(0, 0, 0, 0.7)',
      borderColor: 'rgba(30, 120, 255, 0.4)',
      borderWidth: 1,
      textStyle: {
        color: '#fff'
      }
    },
    xAxis: {
      type: 'category',
      data: props.chartData.map(item => item.name),
      axisLine: {
        lineStyle: {
          color: 'rgba(255, 255, 255, 0.3)'
        }
      },
      axisLabel: {
        color: 'rgba(255, 255, 255, 0.7)'
      }
    },
    yAxis: {
      type: 'value',
      axisLine: {
        lineStyle: {
          color: 'rgba(255, 255, 255, 0.3)'
        }
      },
      splitLine: {
        lineStyle: {
          color: 'rgba(255, 255, 255, 0.1)'
        }
      },
      axisLabel: {
        color: 'rgba(255, 255, 255, 0.7)'
      }
    },
    series: [
      {
        data: props.chartData.map(item => item.value),
        type: 'line',
        smooth: true,
        showSymbol: false,
        lineStyle: {
          color: props.color,
          width: 2
        },
        areaStyle: {
          color: {
            type: 'linear',
            x: 0,
            y: 0,
            x2: 0,
            y2: 1,
            colorStops: [
              {
                offset: 0,
                color: props.color + '80' // 添加透明度
              },
              {
                offset: 1,
                color: props.color + '00' // 透明
              }
            ]
          }
        }
      }
    ],
    grid: {
      left: '1%',
      right: '1%',
      top: '6%',
      bottom: '1%',
      containLabel: true
    }
  }

  chartInstance.setOption(option)
}

// 监听数据变化
watch(
  () => props.chartData,
  () => {
    updateChart()
  },
  { deep: true }
)

// 窗口大小改变时重绘图表
const handleResize = () => {
  if (chartInstance) {
    chartInstance.resize()
  }
}

// 组件挂载时初始化图表
onMounted(() => {
  // 延迟初始化，确保DOM已经完全渲染
  setTimeout(() => {
    initChart()
  }, 200)
  window.addEventListener('resize', handleResize)
})

// 组件销毁前清理资源
onBeforeUnmount(() => {
  window.removeEventListener('resize', handleResize)
  if (chartInstance) {
    chartInstance.dispose()
    chartInstance = null
  }
})
</script>

<style scoped>
.line-chart-container {
  width: 100%;
  height: 100%;
  min-height: 0;
}
</style>