document.addEventListener('DOMContentLoaded', () => {
    // --- 配置区域 ---
    // 设定今年的年份，方便计算
    const currentYear = new Date().getFullYear();

    // 考试日期配置 (月-日)
    const GAOKAO_DATE = `${currentYear}-06-07`;
    const ZHONGKAO_DATE = `${currentYear}-06-20`; // 假设中考在6月20日，可按需修改

    // 节假日配置 (简化版，实际项目可接入API)
    // 格式：'MM-DD': { name: '节日名', type: 'rest'/'work' }
    const holidays = {
        '01-01': { name: '元旦', type: 'rest' },
        '05-01': { name: '劳动节', type: 'rest' },
        '10-01': { name: '国庆节', type: 'rest' },
        // 可以在这里添加更多...
    };

    // --- DOM 元素获取 ---
    const els = {
        clock: document.getElementById('clock'),
        date: document.getElementById('dateDisplay'),
        status: document.getElementById('restStatus'),
        holiday: document.getElementById('holidayName'),
        zhongkaoBox: document.getElementById('zhongkaoInfo'),
        zhongkaoCount: document.getElementById('zhongkaoCountdown'),
        gaokaoBox: document.getElementById('gaokaoFixedDate'), // 获取高考强制显示框
        weatherIcon: document.getElementById('weatherIcon'),
        weatherText: document.getElementById('weatherText'),
        body: document.body
    };

    // --- 核心功能函数 ---

    // 1. 更新时间与日期
    function updateTime() {
        const now = new Date();
        els.clock.textContent = now.toLocaleTimeString('en-GB'); // 24小时制
        els.date.textContent = now.toLocaleDateString('zh-CN', { year: 'numeric', month: 'long', day: 'numeric', weekday: 'long' });

        checkExamAndHoliday(now);
    }

    // 2. 检查考试与节假日逻辑
    function checkExamAndHoliday(now) {
        const month = String(now.getMonth() + 1).padStart(2, '0');
        const day = String(now.getDate()).padStart(2, '0');
        const todayStr = `${month}-${day}`;

        // A. 处理节假日/工作日状态
        if (holidays[todayStr]) {
            const info = holidays[todayStr];
            els.status.textContent = info.type === 'rest' ? '今日休息' : '今日调休上班';
            els.status.className = `badge ${info.type}`;
            els.holiday.textContent = info.name;
        } else {
            // 简单的周末判断
            const dayOfWeek = now.getDay();
            if (dayOfWeek === 0 || dayOfWeek === 6) {
                els.status.textContent = '周末愉快';
                els.status.className = 'badge rest';
                els.holiday.textContent = '';
            } else {
                els.status.textContent = '努力工作';
                els.status.className = 'badge work';
                els.holiday.textContent = '';
            }
        }

        // B. 处理中考倒计时
        const zhongkaoTarget = new Date(ZHONGKAO_DATE);
        const diffTime = zhongkaoTarget - now;
        const diffDays = Math.ceil(diffTime / (1000 * 60 * 60 * 24));

        if (diffDays > 0 && diffDays < 365) {
            els.zhongkaoBox.classList.remove('hidden');
            els.zhongkaoCount.textContent = `${diffDays} 天`;
        } else {
            els.zhongkaoBox.classList.add('hidden');
        }

        // C. 处理高考强制日期显示 (无论何时都显示，或者你可以加个判断只在考前显示)
        // 这里设置为：只要还没过6月9日，就一直显示，或者全年显示
        // 现在的逻辑是：全年强制显示在中考下面
        els.gaokaoBox.classList.remove('hidden');
    }

    // 3. 模拟天气效果 (随机切换背景)
    function updateWeather() {
        const weathers = [
            { type: 'sunny', icon: '☀️', text: '晴朗', class: 'bg-sunny' },
            { type: 'cloudy', icon: '☁️', text: '多云', class: 'bg-cloudy' },
            { type: 'rainy', icon: '🌧️', text: '小雨', class: 'bg-rainy' }
        ];
        // 简单随机，实际可接API
        const w = weathers[Math.floor(Math.random() * weathers.length)];

        els.weatherIcon.textContent = w.icon;
        els.weatherText.textContent = w.text;

        // 清除旧背景类，添加新背景类
        els.body.className = '';
        els.body.classList.add(w.class);
    }

    // --- 初始化运行 ---
    setInterval(updateTime, 1000);
    updateTime(); // 立即执行一次
    updateWeather(); // 加载时随机一个天气
});