<template>
     <div class="chart-container">
        <!-- 图表标题和时间范围选择器 -->
        <div class="chart-header">
            <h2>出勤趋势分析</h2>
            <div class="chart-actions">
                <button @click="timeRange = 'week'" :class="{ active: timeRange === 'week' }">每周</button>
                <button @click="timeRange = 'month'" :class="{ active: timeRange === 'month' }">每月</button>
            </div>
        </div>
        <!-- 图表内容区域 -->
        <div ref="chartRef" class="chart-content"></div>
    </div>
</template>

<script setup>
import { ref, onMounted, computed, watch } from 'vue';
import * as echarts from 'echarts';

// 接收从父组件传入的数据
const props = defineProps({
  attendData: {
    type: Object,
    default: () => ({
      week: {
        xAxis: ['周一', '周二', '周三', '周四', '周五', '周六', '周日'],
        actualCount: [40, 20, 30, 15, 22, 63, 58],
        expectedCount: [100, 556, 413, 115, 510, 115, 317]
      },
      month: {
        xAxis: ['第1周', '第2周', '第3周', '第4周'],
        actualData: [280, 360, 320, 400],
        theoreticalData: [300, 400, 350, 450]
      }
    })
  }
});

// 图表DOM引用
const chartRef = ref(null);
// 图表实例
let chartInstance = null;

// 时间范围状态
const timeRange = ref('week');

// 根据时间范围计算当前显示的数据
const chartData = computed(() => {
  const dataForRange = props.attendData[timeRange.value] || props.attendData.week;
  
  // 处理字段名称差异
  if (timeRange.value === 'week') {
    return {
      xAxis: dataForRange.xAxis || [],
      actualCount: dataForRange.actualCount || [],
      expectedCount: dataForRange.expectedCount || []
    };
  } else {
    return {
      xAxis: dataForRange.xAxis || [],
      actualCount: dataForRange.actualData || [],
      expectedCount: dataForRange.theoreticalData || []
    };
  }
});

// 定义颜色常量
const ACTUAL_COUNT_COLOR = '#029CD4'; // 蓝色 - 实际人数
const EXPECTED_COUNT_COLOR = '#0052D9'; // 蓝色 - 应出勤人数

// 初始化图表
const initChart = () => {
    if (chartRef.value && !chartInstance) {
        chartInstance = echarts.init(chartRef.value);
    }

    // 使用计算后的数据
    const { xAxis, actualCount, expectedCount } = chartData.value;
    

    const option = {
        tooltip: {
            trigger: 'axis',
            backgroundColor: 'rgba(255,255,255,1)',
            borderColor: '#ddd',
            borderWidth: 1,
            textStyle: {
                color: '#333',
                fontSize: 14
            },
            formatter: function(params) {
                const actualCount = params[0].value;
                const expectedCount = params[1].value;
                return `
                    <div style="padding: 5px;">
                        <div style="color: ${params[0].color};">实际人数: ${actualCount}</div>
                        <div style="color: ${params[1].color};">应出勤人数: ${expectedCount}</div>
                    </div>
                `;
            }
        },
        legend: {
            top: 30,
            left: 'center',
            itemWidth: 10,
            itemHeight: 10,
            itemGap: 25,
            data: ['实际人数', '应出勤人数'],
            textStyle: {
                color: '#666',
                fontSize: 12
            }
        },
        grid: {
            top: '30%',
            right: '10%',
            bottom: '10%',
            left: '6%',
            containLabel: true
        },
        xAxis: {
            data: xAxis,
            type: 'category',
            boundaryGap: true,
            axisLabel: {
                textStyle: {
                    color: '#666',
                    fontSize: 12
                }
            },
            axisTick: {
                show: false
            },
            axisLine: {
                lineStyle: {
                    color: '#ddd'
                }
            }
        },
        yAxis: [
            {
                type: 'value',
                name: '人数',
                nameTextStyle: {
                    color: '#666',
                    fontSize: 12
                },
                interval: 100,
                axisLabel: {
                    textStyle: {
                        color: '#666',
                        fontSize: 12
                    }
                },
                axisTick: {
                    show: false
                },
                axisLine: {
                    show: false
                },
                splitLine: {
                    lineStyle: {
                        color: '#f0f0f0',
                        type: 'dashed'
                    }
                }
            }
        ],
        series: [
            {
                name: '实际人数',
                type: 'bar',
                barWidth: '40%',
                itemStyle: {
                    color: ACTUAL_COUNT_COLOR
                },
                data: actualCount
            },
            {
                name: '应出勤人数',
                type: 'line',
                showSymbol: false,
                symbol: 'circle',
                symbolSize: 6,
                emphasis: {
                    showSymbol: true,
                    symbolSize: 10
                },
                lineStyle: {
                    width: 2,
                    color: EXPECTED_COUNT_COLOR
                },
                itemStyle: {
                    color: EXPECTED_COUNT_COLOR,
                    borderColor: '#fff',
                    borderWidth: 2
                },
                data: expectedCount
            }
        ]
    };

    chartInstance.setOption(option);
};

// 响应窗口大小变化
const handleResize = () => {
    if (chartInstance) {
        chartInstance.resize();
    }
};

// 监听时间范围变化，更新图表
watch(timeRange, () => {
    initChart();
});

// 监听数据变化，更新图表
watch(() => props.attendData, () => {
    initChart();
}, { deep: true });

// 生命周期钩子
onMounted(() => {
    initChart();
    window.addEventListener('resize', handleResize);

    // 清理函数
    return () => {
        window.removeEventListener('resize', handleResize);
        if (chartInstance) {
            chartInstance.dispose();
            chartInstance = null;
        }
    };
});

</script>

<style scoped>
.chart-container {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    height: 435px;
    width: 100%;
    padding: 10px;
    box-sizing: border-box;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    border-bottom: 1px solid #f0f0f0;
}

.chart-header h2 {
    font-size: 16px;
    font-weight: 600;
    color: #333;
    margin: 0;
}

.chart-actions button {
    background: none;
    border: 1px solid #e0e0e0;
    padding: 5px 12px;
    border-radius: 4px;
    margin-left: 8px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.2s ease;
}

.chart-actions button.active {
    background-color: #1890ff;
    color: white;
    border-color: #1890ff;
}

.chart-content {
    width: 100%;
    height: calc(100% - 54px);
    padding: 10px;
}

@media (max-width: 768px) {
    .chart-container {
        height: 435px;
    }
}

@media (max-width: 480px) {
    .chart-container {
        height: 400px;
    }

    .chart-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .chart-actions {
        width: 100%;
        display: flex;
        justify-content: space-between;
    }

    .chart-actions button {
        margin: 0;
        flex: 1;
        margin-right: 5px;
    }

    .chart-actions button:last-child {
        margin-right: 0;
    }
}

.model {
    padding: 20px;
    background-color: rgba(242, 248, 252, 1);
}
</style>