// ==UserScript==
// @name         国家2026年人工智能刷课脚本
// @namespace    http://tampermonkey.net/
// @version      3.4
// @description  修复视频完成后无法自动下一个+完美展开+连续播放+防504
// @author       ark
// @match        https://higher.smartedu.cn/*
// @grant        GM_addStyle
// @run-at       document-end
// ==/UserScript==

(function() {
    'use strict';

    // ==================== 样式定义 ====================
    GM_addStyle(`
        #auto-study-panel {
            position: fixed;
            top: 20px;
            right: 20px;
            width: 340px;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            border-radius: 16px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
            z-index: 999999;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            color: #ffffff;
            overflow: hidden;
            transition: all 0.3s ease;
            user-select: none;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        #auto-study-panel.minimized {
            width: 60px;
            height: 60px;
            border-radius: 50%;
        }

        #auto-study-panel.minimized .panel-content {
            display: none;
        }

        #auto-study-panel.minimized .panel-header {
            height: 60px;
            padding: 0;
            justify-content: center;
        }

        #auto-study-panel.minimized .panel-title {
            display: none;
        }

        .panel-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            background: rgba(255, 255, 255, 0.05);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            cursor: move;
        }

        .panel-title {
            font-size: 16px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .panel-title::before {
            content: '';
            width: 8px;
            height: 8px;
            background: #10b981;
            border-radius: 50%;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.5; }
        }

        .panel-controls {
            display: flex;
            gap: 8px;
        }

        .panel-btn {
            width: 28px;
            height: 28px;
            border: none;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.1);
            color: #ffffff;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s ease;
            font-size: 14px;
        }

        .panel-btn:hover {
            background: rgba(255, 255, 255, 0.2);
        }

        .panel-btn.minimize-btn {
            font-size: 18px;
        }

        .panel-content {
            padding: 20px;
        }

        .status-section {
            margin-bottom: 20px;
        }

        .status-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 12px;
            font-size: 14px;
        }

        .status-label {
            color: #94a3b8;
        }

        .status-value {
            font-weight: 500;
            color: #ffffff;
        }

        .status-value.running {
            color: #10b981;
        }

        .status-value.paused {
            color: #f59e0b;
        }

        .status-value.stopped {
            color: #ef4444;
        }

        .progress-bar {
            width: 100%;
            height: 8px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 4px;
            overflow: hidden;
            margin-top: 8px;
        }

        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, #10b981, #06b6d4);
            border-radius: 4px;
            transition: width 0.3s ease;
        }

        .settings-section {
            margin-bottom: 20px;
            padding-top: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        .settings-title {
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 12px;
            color: #94a3b8;
        }

        .setting-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 10px;
        }

        .setting-label {
            font-size: 13px;
            color: #cbd5e1;
        }

        .setting-input {
            width: 70px;
            padding: 6px 10px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 6px;
            background: rgba(255, 255, 255, 0.05);
            color: #ffffff;
            font-size: 13px;
            text-align: center;
        }

        .setting-input:focus {
            outline: none;
            border-color: #10b981;
        }

        .action-buttons {
            display: flex;
            gap: 10px;
            margin-bottom: 16px;
        }

        .action-btn {
            flex: 1;
            padding: 12px 0;
            border: none;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .action-btn.expand-btn {
            background: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);
            color: #ffffff;
        }

        .action-btn.expand-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(139, 92, 246, 0.4);
        }

        .action-btn.start-btn {
            background: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
            color: #0a0a0a;
        }

        .action-btn.start-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
        }

        .action-btn.pause-btn {
            background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
            color: #0a0a0a;
        }

        .action-btn.pause-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
        }

        .action-btn.stop-btn {
            background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
            color: #ffffff;
        }

        .action-btn.stop-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
        }

        .action-btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: none !important;
            box-shadow: none !important;
        }

        .log-section {
            margin-top: 16px;
            padding-top: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        .log-title {
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 10px;
            color: #94a3b8;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .clear-log-btn {
            font-size: 12px;
            color: #94a3b8;
            background: none;
            border: none;
            cursor: pointer;
        }

        .clear-log-btn:hover {
            color: #ffffff;
        }

        .log-container {
            height: 140px;
            overflow-y: auto;
            background: rgba(0, 0, 0, 0.2);
            border-radius: 8px;
            padding: 10px;
            font-size: 12px;
            font-family: 'Consolas', monospace;
            color: #e2e8f0;
        }

        .log-container::-webkit-scrollbar {
            width: 4px;
        }

        .log-container::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.2);
            border-radius: 2px;
        }

        .log-item {
            margin-bottom: 4px;
            line-height: 1.4;
        }

        .log-item.info {
            color: #06b6d4;
        }

        .log-item.success {
            color: #10b981;
        }

        .log-item.warning {
            color: #f59e0b;
        }

        .log-item.error {
            color: #ef4444;
        }
    `);

    // ==================== 全局变量 ====================
    let isRunning = false;
    let isPaused = false;
    let currentIndex = 0;
    let totalVideos = 0;
    let videoItems = [];
    let pauseResolve = null;
    let stopRequested = false;
    let isAllExpanded = false;

    // 默认配置（已针对反检测优化）
    const config = {
        scrollDelayMin: 1200,    // 滚动后最小等待时间(ms)
        scrollDelayMax: 1800,    // 滚动后最大等待时间(ms)
        loadDelayMin: 4000,      // 点击后视频最小加载时间(ms)
        loadDelayMax: 6000,      // 点击后视频最大加载时间(ms)
        closeDelayMin: 3000,     // 关闭后最小等待时间(ms)
        closeDelayMax: 4000,     // 关闭后最大等待时间(ms)
        checkInterval: 3000,     // 视频进度检查间隔(ms)
        maxTimeout: 600,         // 单个视频最大超时次数(3秒/次 = 30分钟)
        progressWaitTime: 30000, // 视频播完后等待系统更新进度的时间(ms)
        expandDelayMin: 400,     // 展开章节最小间隔(ms)
        expandDelayMax: 800      // 展开章节最大间隔(ms)
    };

    // ==================== UI创建 ====================
    function createPanel() {
        const panel = document.createElement('div');
        panel.id = 'auto-study-panel';
        panel.innerHTML = `
            <div class="panel-header" id="panel-header">
                <div class="panel-title">自动挂课助手</div>
                <div class="panel-controls">
                    <button class="panel-btn minimize-btn" id="minimize-btn">−</button>
                </div>
            </div>
            <div class="panel-content">
                <div class="status-section">
                    <div class="status-item">
                        <span class="status-label">运行状态</span>
                        <span class="status-value stopped" id="status-text">已停止</span>
                    </div>
                    <div class="status-item">
                        <span class="status-label">播放进度</span>
                        <span class="status-value" id="progress-text">0 / 0</span>
                    </div>
                    <div class="progress-bar">
                        <div class="progress-fill" id="progress-fill" style="width: 0%"></div>
                    </div>
                </div>

                <div class="settings-section">
                    <div class="settings-title">参数设置</div>
                    <div class="setting-item">
                        <span class="setting-label">滚动等待(ms)</span>
                        <input type="number" class="setting-input" id="scroll-delay" value="${(config.scrollDelayMin + config.scrollDelayMax) / 2}">
                    </div>
                    <div class="setting-item">
                        <span class="setting-label">加载等待(ms)</span>
                        <input type="number" class="setting-input" id="load-delay" value="${(config.loadDelayMin + config.loadDelayMax) / 2}">
                    </div>
                    <div class="setting-item">
                        <span class="setting-label">关闭等待(ms)</span>
                        <input type="number" class="setting-input" id="close-delay" value="${(config.closeDelayMin + config.closeDelayMax) / 2}">
                    </div>
                    <div class="setting-item">
                        <span class="setting-label">进度等待(ms)</span>
                        <input type="number" class="setting-input" id="progress-wait" value="${config.progressWaitTime}">
                    </div>
                </div>

                <div class="action-buttons">
                    <button class="action-btn expand-btn" id="expand-btn">展开全部</button>
                    <button class="action-btn start-btn" id="start-btn">开始学习</button>
                    <button class="action-btn pause-btn" id="pause-btn" disabled>暂停</button>
                    <button class="action-btn stop-btn" id="stop-btn" disabled>停止</button>
                </div>

                <div class="log-section">
                    <div class="log-title">
                        <span>运行日志</span>
                        <button class="clear-log-btn" id="clear-log-btn">清空</button>
                    </div>
                    <div class="log-container" id="log-container"></div>
                </div>
            </div>
        `;

        document.body.appendChild(panel);
        bindEvents();
        makeDraggable(panel);
        log('info', '✅ 终极挂课脚本 V3.3 已加载完成');
        log('info', '💡 已修复视频完成后无法自动下一个的Bug');
    }

    // ==================== 事件绑定 ====================
    function bindEvents() {
        document.getElementById('expand-btn').addEventListener('click', expandAllChapters);
        document.getElementById('start-btn').addEventListener('click', startAutoStudy);
        document.getElementById('pause-btn').addEventListener('click', togglePause);
        document.getElementById('stop-btn').addEventListener('click', stopAutoStudy);
        document.getElementById('minimize-btn').addEventListener('click', toggleMinimize);
        document.getElementById('clear-log-btn').addEventListener('click', clearLog);

        // 配置输入框事件
        document.getElementById('scroll-delay').addEventListener('change', (e) => {
            const value = parseInt(e.target.value) || 1500;
            config.scrollDelayMin = value - 300;
            config.scrollDelayMax = value + 300;
        });
        document.getElementById('load-delay').addEventListener('change', (e) => {
            const value = parseInt(e.target.value) || 5000;
            config.loadDelayMin = value - 1000;
            config.loadDelayMax = value + 1000;
        });
        document.getElementById('close-delay').addEventListener('change', (e) => {
            const value = parseInt(e.target.value) || 3500;
            config.closeDelayMin = value - 500;
            config.closeDelayMax = value + 500;
        });
        document.getElementById('progress-wait').addEventListener('change', (e) => {
            config.progressWaitTime = parseInt(e.target.value) || 30000;
        });
    }

    // ==================== 拖拽功能 ====================
    function makeDraggable(element) {
        const header = document.getElementById('panel-header');
        let isDragging = false;
        let offsetX, offsetY;

        header.addEventListener('mousedown', (e) => {
            if (e.target.closest('.panel-controls')) return;
            isDragging = true;
            offsetX = e.clientX - element.offsetLeft;
            offsetY = e.clientY - element.offsetTop;
            element.style.zIndex = '999999';
        });

        document.addEventListener('mousemove', (e) => {
            if (!isDragging) return;
            const x = e.clientX - offsetX;
            const y = e.clientY - offsetY;
            element.style.left = `${x}px`;
            element.style.top = `${y}px`;
            element.style.right = 'auto';
        });

        document.addEventListener('mouseup', () => {
            isDragging = false;
        });
    }

    // ==================== 核心功能：自动展开所有章节 ====================
    async function expandAllChapters() {
        log('info', '🔍 正在扫描所有章节...');
        
        try {
            // 第一步：展开所有大章节（li.list-item）
            const mainChapters = document.querySelectorAll('li.list-item');
            log('info', `📚 找到 ${mainChapters.length} 个大章节`);

            for (let i = 0; i < mainChapters.length; i++) {
                if (stopRequested) break;
                
                const chapter = mainChapters[i];
                const leftItem = chapter.querySelector('.left-item');
                const icon = leftItem?.querySelector('.icon');
                
                // 通过icon的is-expanded类判断是否已经展开
                if (leftItem && icon && !icon.classList.contains('is-expanded')) {
                    log('info', `📖 展开大章节 ${i + 1}/${mainChapters.length}`);
                    safeClick(leftItem);
                    await randomSleep(config.expandDelayMin, config.expandDelayMax);
                }
            }

            // 第二步：展开所有小节（ant-collapse-item）
            const subChapters = document.querySelectorAll('.ant-collapse-item');
            log('info', `📑 找到 ${subChapters.length} 个小节`);

            for (let i = 0; i < subChapters.length; i++) {
                if (stopRequested) break;
                
                const chapter = subChapters[i];
                const header = chapter.querySelector('.ant-collapse-header');
                
                if (header && header.getAttribute('aria-expanded') !== 'true') {
                    log('info', `📖 展开小节 ${i + 1}/${subChapters.length}`);
                    safeClick(header);
                    await randomSleep(config.expandDelayMin, config.expandDelayMax);
                }
            }

            // 等待所有内容渲染完成
            await sleep(1500);
            
            // 第三步：收集所有可见的视频项
            videoItems = Array.from(document.querySelectorAll('.child-item')).filter(item => {
                return item.offsetParent !== null;
            });
            totalVideos = videoItems.length;
            
            if (totalVideos === 0) {
                log('warning', '⚠️ 未找到任何可见的视频项');
            } else {
                log('success', `🎉 所有章节已成功展开，共找到 ${totalVideos} 个可见视频`);
            }
            
            isAllExpanded = true;
            updateUI();
            
        } catch (error) {
            log('error', `❌ 展开章节时出错: ${error.message}`);
            console.error(error);
        }
    }

    // ==================== 核心功能：自动学习 ====================
    async function startAutoStudy() {
        if (isRunning) return;

        try {
            // 只有在未展开过的情况下才自动展开
            if (!isAllExpanded) {
                log('info', '🔄 检测到未展开章节，正在自动展开...');
                await expandAllChapters();
            }

            if (totalVideos === 0) {
                log('error', '❌ 没有找到任何视频，请先点击"展开全部"按钮！');
                return;
            }

            isRunning = true;
            isPaused = false;
            stopRequested = false;
            currentIndex = 0;

            updateUI();
            log('info', `🚀 开始自动学习，共 ${totalVideos} 个视频`);

            for (let i = 0; i < totalVideos; i++) {
                if (stopRequested) break;

                currentIndex = i + 1;
                updateUI();

                const currentItem = videoItems[i];
                
                // 检查进度，已完成则跳过
                const processElement = currentItem.querySelector('.process');
                const processText = processElement ? processElement.innerText.trim() : '';
                if (processText.includes('100%') || processText.includes('已完成')) {
                    log('info', `⏭️ 第 ${currentIndex} 个视频进度 [${processText}]，已跳过`);
                    continue;
                }

                // 等待暂停
                if (isPaused) {
                    log('info', '⏸️ 已暂停，等待继续...');
                    await new Promise(resolve => { pauseResolve = resolve; });
                    if (stopRequested) break;
                    log('info', '▶️ 继续学习');
                }

                // 滚动到当前视频
                log('info', `▶️ 正在打开第 ${currentIndex} 个视频`);
                currentItem.scrollIntoView({ behavior: 'smooth', block: 'center' });
                await randomSleep(config.scrollDelayMin, config.scrollDelayMax);

                // 安全点击打开视频
                safeClick(currentItem);
                await randomSleep(config.loadDelayMin, config.loadDelayMax);

                // 验证视频弹窗是否真的打开了
                const videoEl = document.querySelector('video');
                if (!videoEl) {
                    log('warning', `⚠️ 第 ${currentIndex} 个视频弹窗未打开，重试一次...`);
                    safeClick(currentItem);
                    await randomSleep(config.loadDelayMin, config.loadDelayMax);
                }

                // 尝试点击播放按钮
                const playBtn = document.querySelector('.video-play');
                if (playBtn) {
                    log('info', '🎬 点击播放按钮');
                    safeClick(playBtn);
                    await sleep(1000);
                }

                // 等待视频播放完成
                log('info', '⏳ 正在监测视频播放进度...');
                await waitForProcessToEnd(currentItem, currentIndex);

                // 关闭弹窗
                log('info', '🔙 正在关闭视频弹窗...');
                forceCloseModal();
                await randomSleep(config.closeDelayMin, config.closeDelayMax);
            }

            if (stopRequested) {
                log('info', '⏹️ 用户手动停止了学习');
            } else {
                log('success', '🎉 恭喜！所有视频已全部学习完成！');
            }

        } catch (error) {
            log('error', `❌ 学习过程中出错: ${error.message}`);
            console.error(error);
        }

        isRunning = false;
        isPaused = false;
        updateUI();
    }

    // ==================== 控制功能 ====================
    function togglePause() {
        if (!isRunning) return;

        isPaused = !isPaused;
        updateUI();

        if (!isPaused && pauseResolve) {
            pauseResolve();
            pauseResolve = null;
        }
    }

    function stopAutoStudy() {
        if (!isRunning) return;

        stopRequested = true;
        if (isPaused && pauseResolve) {
            pauseResolve();
        }
    }

    function toggleMinimize() {
        const panel = document.getElementById('auto-study-panel');
        panel.classList.toggle('minimized');
    }

    // ==================== 辅助函数 ====================
    function sleep(ms) {
        return new Promise(resolve => setTimeout(resolve, ms));
    }

    // 随机延时（反检测核心）
    function randomSleep(min, max) {
        const ms = Math.floor(Math.random() * (max - min + 1)) + min;
        return sleep(ms);
    }

    // 安全点击函数
    function safeClick(element) {
        if (!element) return;

        try {
            // 方法1：原生click()方法（最稳定）
            element.click();
            
            // 方法2：备用事件触发
            setTimeout(() => {
                const event = document.createEvent('MouseEvents');
                event.initMouseEvent(
                    'click', true, true, window, 0,
                    0, 0, 0, 0, false, false, false, false, 0, null
                );
                element.dispatchEvent(event);
            }, 50);
            
        } catch (error) {
            log('warning', `⚠️ 点击时出现小问题，已自动处理`);
            console.error(error);
        }
    }

    // 强制关闭弹窗（多重保障）
    function forceCloseModal() {
        try {
            // 1. 首选：antd 关闭图标
            const closeIcon = document.querySelector('.anticon-close');
            if (closeIcon && closeIcon.offsetParent !== null) {
                log('info', '🎯 点击关闭图标');
                safeClick(closeIcon);
                return;
            }

            // 2. 备选：视频弹窗关闭按钮
            const closeBtn = document.querySelector('.video-modal-close');
            if (closeBtn && closeBtn.offsetParent !== null) {
                log('info', '🎯 点击关闭按钮');
                safeClick(closeBtn);
                return;
            }

            // 3. 备选：遮罩层点击
            const mask = document.querySelector('.video-modal-mask');
            if (mask) {
                log('info', '🎯 点击遮罩层');
                safeClick(mask);
                return;
            }

            // 4. 终极：ESC 键
            log('info', '🎯 按下 ESC 键');
            document.dispatchEvent(new KeyboardEvent('keydown', { key: 'Escape', bubbles: true }));
            document.dispatchEvent(new KeyboardEvent('keyup', { key: 'Escape', bubbles: true }));
            
        } catch (error) {
            log('warning', `⚠️ 关闭弹窗时出现小问题`);
            console.error(error);
        }
    }

    // ✅ 完全重写：监听进度与防卡死逻辑（修复核心Bug）
    function waitForProcessToEnd(itemNode, index) {
        return new Promise((resolve) => {
            let timeoutCount = 0;
            let mainInterval = null;
            let progressTimeout = null;
            let hasVideoEnded = false;

            // 清理所有定时器的函数
            function cleanupAndResolve() {
                if (mainInterval) clearInterval(mainInterval);
                if (progressTimeout) clearTimeout(progressTimeout);
                resolve();
            }

            // 主检查循环
            mainInterval = setInterval(() => {
                if (stopRequested) {
                    cleanupAndResolve();
                    return;
                }

                if (isPaused) return;

                timeoutCount++;

                try {
                    // 【条件1】系统进度达到100%（最可靠）
                    const processNode = itemNode.querySelector('.process');
                    if (processNode) {
                        const processText = processNode.innerText.trim();
                        if (processText.includes('100%') || processText.includes('已完成')) {
                            log('success', `✅ 第 ${index} 个视频系统进度已更新为 ${processText}`);
                            cleanupAndResolve();
                            return;
                        }
                    }

                    // 【条件2】视频本体播放完毕
                    const videoEl = document.querySelector('video');
                    if (videoEl && !hasVideoEnded) {
                        videoEl.muted = true; // 强制静音
                        
                        // 自动恢复意外暂停
                        if (videoEl.paused && videoEl.currentTime < videoEl.duration) {
                            videoEl.play().catch(() => {});
                        }

                        // 视频播放完成
                        if (videoEl.ended || (videoEl.duration > 0 && videoEl.duration - videoEl.currentTime <= 1)) {
                            hasVideoEnded = true;
                            log('warning', `⚠️ 第 ${index} 个视频已播完，等待系统更新进度（最多${config.progressWaitTime/1000}秒）...`);
                            
                            // 开始等待系统更新进度
                            progressTimeout = setTimeout(() => {
                                log('warning', `⏰ 等待进度更新超时，强制进入下一个视频`);
                                cleanupAndResolve();
                            }, config.progressWaitTime);
                        }
                    }

                    // 【条件3】全局超时保护（防504假死）
                    if (timeoutCount > config.maxTimeout) {
                        log('warning', `🚨 第 ${index} 个视频监测超时（可能服务器504），强行跳过`);
                        cleanupAndResolve();
                    }
                    
                } catch (error) {
                    log('warning', `⚠️ 检查进度时出现小问题`);
                    console.error(error);
                }

            }, config.checkInterval);
        });
    }

    // 日志功能
    function log(type, message) {
        try {
            const container = document.getElementById('log-container');
            const item = document.createElement('div');
            item.className = `log-item ${type}`;
            item.textContent = `[${new Date().toLocaleTimeString()}] ${message}`;
            container.appendChild(item);
            container.scrollTop = container.scrollHeight;
        } catch (error) {
            console.log(message);
        }
    }

    function clearLog() {
        document.getElementById('log-container').innerHTML = '';
    }

    // 更新UI状态
    function updateUI() {
        try {
            const statusText = document.getElementById('status-text');
            const progressText = document.getElementById('progress-text');
            const progressFill = document.getElementById('progress-fill');
            const expandBtn = document.getElementById('expand-btn');
            const startBtn = document.getElementById('start-btn');
            const pauseBtn = document.getElementById('pause-btn');
            const stopBtn = document.getElementById('stop-btn');

            // 更新状态
            if (isRunning) {
                if (isPaused) {
                    statusText.textContent = '已暂停';
                    statusText.className = 'status-value paused';
                    pauseBtn.textContent = '继续';
                } else {
                    statusText.textContent = '学习中';
                    statusText.className = 'status-value running';
                    pauseBtn.textContent = '暂停';
                }
            } else {
                statusText.textContent = '已停止';
                statusText.className = 'status-value stopped';
            }

            // 更新进度
            progressText.textContent = `${currentIndex} / ${totalVideos}`;
            const progress = totalVideos > 0 ? (currentIndex / totalVideos) * 100 : 0;
            progressFill.style.width = `${progress}%`;

            // 更新按钮状态
            expandBtn.disabled = isRunning;
            startBtn.disabled = isRunning;
            pauseBtn.disabled = !isRunning;
            stopBtn.disabled = !isRunning;
            
        } catch (error) {
            console.error(error);
        }
    }

    // ==================== 初始化 ====================
    if (document.readyState === 'complete' || document.readyState === 'interactive') {
        createPanel();
    } else {
        window.addEventListener('DOMContentLoaded', createPanel);
    }
})();