// ==UserScript==
// @name         高教在线刷课助手（最终修复版）
// @namespace    http://tampermonkey.net/
// @version      0.0.5
// @description  修复PPT提前跳转、窗口拖拽及多窗口问题
// @author       Sweek
// @match        *://*.cqooc.com/*
// @license      GPLv3
// @grant        GM_addStyle
// @grant        GM_setValue
// @grant        GM_getValue
// ==/UserScript==

(function() {
    'use strict';

    // 防止重复加载（核心修复多窗口问题）
    const instanceKey = 'sweek_helper_instance';
    if (GM_getValue(instanceKey)) {
        return; // 已存在实例，不再加载
    }
    GM_setValue(instanceKey, true);
    window.addEventListener('beforeunload', () => {
        GM_setValue(instanceKey, false);
    });

    // 强制样式（解决窗口显示异常）
    GM_addStyle(`
        #sweek-helper-window {
            position: fixed !important;
            top: 20px !important;
            left: 20px !important;
            width: 380px !important;
            height: 500px !important;
            background: white !important;
            border: 2px solid #479e82 !important;
            border-radius: 8px !important;
            z-index: 999999 !important;
            box-shadow: 0 0 15px rgba(0,0,0,0.2) !important;
            overflow: hidden !important;
            font-family: "Microsoft YaHei", sans-serif !important;
            display: block !important;
        }
        #sweek-window-header {
            height: 45px !important;
            background: #479e82 !important;
            color: white !important;
            padding: 0 15px !important;
            line-height: 45px !important;
            font-size: 15px !important;
            font-weight: bold !important;
            cursor: move !important;
            display: flex !important;
            justify-content: space-between !important;
            align-items: center !important;
        }
        #sweek-minimize-btn {
            width: 30px !important;
            height: 30px !important;
            line-height: 30px !important;
            text-align: center !important;
            cursor: pointer !important;
            border-radius: 4px !important;
            background: rgba(255,255,255,0.2) !important;
        }
        #sweek-tab-container {
            height: 40px !important;
            display: flex !important;
            border-bottom: 1px solid #eee !important;
        }
        .sweek-tab {
            flex: 1 !important;
            text-align: center !important;
            line-height: 40px !important;
            cursor: pointer !important;
            font-size: 14px !important;
            color: #666 !important;
            background: #f5f5f5 !important;
        }
        .sweek-tab.active {
            background: white !important;
            color: #479e82 !important;
            border-bottom: 2px solid #479e82 !important;
        }
        #sweek-content-container {
            height: calc(100% - 85px) !important;
            overflow: hidden !important;
        }
        .sweek-content {
            height: 100% !important;
            overflow-y: auto !important;
            padding: 10px !important;
            display: none !important;
        }
        .sweek-content.active {
            display: block !important;
        }
        #sweek-log-container {
            color: #333 !important;
            font-size: 13px !important;
            line-height: 1.6 !important;
        }
        #sweek-status-container {
            color: #333 !important;
            font-size: 13px !important;
            line-height: 1.8 !important;
        }
        .sweek-log-item {
            margin: 3px 0 !important;
            padding: 2px 0 !important;
            border-bottom: 1px dashed #f0f0f0 !important;
        }
        .sweek-notification {
            position: fixed !important;
            top: 20px !important;
            right: 20px !important;
            padding: 12px 15px !important;
            background: white !important;
            border-left: 4px solid #479e82 !important;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1) !important;
            z-index: 999998 !important;
            font-size: 14px !important;
            color: #333 !important;
        }
    `);

    // 全局变量
    let taskQueue = [];
    let isWindowMinimized = false;
    let dragOffset = { x: 0, y: 0 };
    let isDragging = false;
    let activeTimer = null; // 唯一定时器
    let currentContentType = null; // 当前内容类型

    // 初始化单窗口（确保只创建一个窗口）
    function initWindow() {
        // 先移除可能存在的旧窗口
        const oldWindow = document.getElementById('sweek-helper-window');
        if (oldWindow) {
            oldWindow.remove();
        }

        // 创建新窗口
        const windowEl = document.createElement('div');
        windowEl.id = 'sweek-helper-window';
        windowEl.innerHTML = `
            <div id="sweek-window-header">
                <span>高教在线刷课助手 v0.0.5</span>
                <div id="sweek-minimize-btn">—</div>
            </div>
            <div id="sweek-tab-container">
                <div class="sweek-tab active" data-tab="status">状态信息</div>
                <div class="sweek-tab" data-tab="log">执行日志</div>
            </div>
            <div id="sweek-content-container">
                <div id="sweek-status-container" class="sweek-content active">
                    <p>初始化中...</p>
                </div>
                <div id="sweek-log-container" class="sweek-content">
                    <div class="sweek-log-item">[${getCurrentTime()}] 日志启动</div>
                </div>
            </div>
        `;
        document.body.appendChild(windowEl);

        // 绑定窗口事件
        bindWindowEvents();
        addLog('窗口初始化完成');
    }

    // 绑定窗口事件（修复拖拽问题）
    function bindWindowEvents() {
        const windowEl = document.getElementById('sweek-helper-window');
        const headerEl = document.getElementById('sweek-window-header');
        const minimizeBtn = document.getElementById('sweek-minimize-btn');
        const tabContainer = document.getElementById('sweek-tab-container');

        // 最小化功能
        minimizeBtn.addEventListener('click', () => {
            isWindowMinimized = !isWindowMinimized;
            const contentContainer = document.getElementById('sweek-content-container');
            const tabContainerEl = document.getElementById('sweek-tab-container');
            
            if (isWindowMinimized) {
                contentContainer.style.display = 'none';
                tabContainerEl.style.display = 'none';
                windowEl.style.height = '45px';
                minimizeBtn.textContent = '□';
            } else {
                contentContainer.style.display = 'block';
                tabContainerEl.style.display = 'flex';
                windowEl.style.height = '500px';
                minimizeBtn.textContent = '—';
            }
        });

        // Tab切换
        tabContainer.addEventListener('click', (e) => {
            const tab = e.target.closest('.sweek-tab');
            if (!tab) return;
            
            document.querySelectorAll('.sweek-tab').forEach(el => el.classList.remove('active'));
            tab.classList.add('active');
            
            const tabName = tab.dataset.tab;
            document.querySelectorAll('.sweek-content').forEach(el => el.classList.remove('active'));
            document.getElementById(`sweek-${tabName}-container`).classList.add('active');
        });

        // 窗口拖拽（核心修复拖拽问题）
        headerEl.addEventListener('mousedown', (e) => {
            e.preventDefault(); // 防止默认行为干扰
            isDragging = true;
            // 计算鼠标相对窗口的位置
            dragOffset.x = e.clientX - windowEl.getBoundingClientRect().left;
            dragOffset.y = e.clientY - windowEl.getBoundingClientRect().top;
            headerEl.style.cursor = 'grabbing';
        });

        // 鼠标移动时拖动窗口
        document.addEventListener('mousemove', (e) => {
            if (isDragging) {
                e.preventDefault();
                const windowEl = document.getElementById('sweek-helper-window');
                if (!windowEl) {
                    isDragging = false;
                    return;
                }
                
                // 计算新位置
                const newX = e.clientX - dragOffset.x;
                const newY = e.clientY - dragOffset.y;
                
                // 限制在可视区域内
                const maxX = window.innerWidth - windowEl.offsetWidth;
                const maxY = window.innerHeight - windowEl.offsetHeight;
                const constrainedX = Math.max(0, Math.min(newX, maxX));
                const constrainedY = Math.max(0, Math.min(newY, maxY));
                
                // 设置新位置
                windowEl.style.left = `${constrainedX}px`;
                windowEl.style.top = `${constrainedY}px`;
            }
        });

        // 释放拖动
        document.addEventListener('mouseup', () => {
            isDragging = false;
            headerEl.style.cursor = 'move';
        });
    }

    // 工具函数
    function getCurrentTime() {
        const date = new Date();
        return date.toLocaleTimeString('zh-CN', { hour12: false });
    }

    function formatTime(seconds) {
        const mins = Math.floor(seconds / 60);
        const secs = Math.floor(seconds % 60);
        return `${mins}:${secs < 10 ? '0' + secs : secs}`;
    }

    function addLog(message) {
        const logContainer = document.getElementById('sweek-log-container');
        if (!logContainer) return;
        
        const logItem = document.createElement('div');
        logItem.className = 'sweek-log-item';
        logItem.textContent = `[${getCurrentTime()}] ${message}`;
        logContainer.appendChild(logItem);
        logContainer.scrollTop = logContainer.scrollHeight;
    }

    function updateStatus(html) {
        const statusContainer = document.getElementById('sweek-status-container');
        if (statusContainer) {
            statusContainer.innerHTML = html;
        }
    }

    function showNotification(message, duration = 3000) {
        const notification = document.createElement('div');
        notification.className = 'sweek-notification';
        notification.textContent = message;
        document.body.appendChild(notification);
        
        setTimeout(() => {
            notification.style.opacity = '0';
            setTimeout(() => notification.remove(), 300);
        }, duration);
    }

    // 内容类型识别（增强PPT识别）
    function getContentType() {
        const body = document.body.innerHTML.toLowerCase();
        
        // 增强PPT识别规则
        if (body.includes('ppt') || 
            body.includes('powerpoint') || 
            body.includes('幻灯片') ||
            body.includes('slide') && !body.includes('video')) {
            return 'ppt';
        } else if (body.includes('video') || body.includes('dplayer')) {
            return 'video';
        } else if (body.includes('pdf') || body.includes('pdf-viewer')) {
            return 'pdf';
        }
        return 'unknown';
    }

    // 修复PPT提前跳转问题（精确计时）
    function handlePPT() {
        return new Promise((resolve) => {
            currentContentType = 'ppt';
            const totalSeconds = 35;
            let remainingSeconds = totalSeconds;
            addLog(`开始处理PPT，将在${totalSeconds}秒后完成`);

            // 清除可能存在的旧定时器
            if (activeTimer) clearInterval(activeTimer);

            // 立即更新一次状态
            updatePPTStatus(remainingSeconds, totalSeconds);

            // 使用精确计时
            const startTime = Date.now();
            activeTimer = setInterval(() => {
                // 计算实际已过去的时间（解决定时器不准问题）
                const elapsed = Math.floor((Date.now() - startTime) / 1000);
                remainingSeconds = totalSeconds - elapsed;

                if (remainingSeconds <= 0) {
                    clearInterval(activeTimer);
                    activeTimer = null;
                    addLog('PPT处理完成，准备跳转下一节');
                    resolve();
                } else {
                    updatePPTStatus(remainingSeconds, totalSeconds);
                }
            }, 1000); // 每秒检查一次
        });
    }

    // 更新PPT状态
    function updatePPTStatus(remaining, total) {
        const progress = ((total - remaining) / total) * 100;
        updateStatus(`
            <p>内容类型: PPT</p>
            <p>处理进度: ${progress.toFixed(1)}%</p>
            <p>剩余时间: ${remaining}秒</p>
            <p>总耗时: ${total}秒</p>
        `);
    }

    // 处理视频
    function handleVideo() {
        return new Promise((resolve) => {
            currentContentType = 'video';
            addLog('开始处理视频内容');
            const video = document.querySelector('video');
            
            if (!video) {
                addLog('未找到视频元素，5秒后重试');
                setTimeout(resolve, 5000);
                return;
            }

            // 清除旧定时器
            if (activeTimer) clearInterval(activeTimer);

            // 强制播放
            function forcePlay() {
                if (video.paused && !video.ended) {
                    video.play().catch(() => {
                        video.muted = true;
                        video.play().catch(err => addLog(`播放失败: ${err.message}`));
                    });
                }
            }

            // 设置倍速
            video.playbackRate = 1.5;
            addLog(`视频倍速设置为: ${video.playbackRate}x`);
            forcePlay();
            video.addEventListener('pause', forcePlay);

            // 进度更新
            activeTimer = setInterval(() => {
                if (video.duration) {
                    const progress = (video.currentTime / video.duration) * 100;
                    updateStatus(`
                        <p>内容类型: 视频</p>
                        <p>播放进度: ${progress.toFixed(1)}%</p>
                        <p>当前时长: ${formatTime(video.currentTime)}/${formatTime(video.duration)}</p>
                        <p>播放倍速: ${video.playbackRate}x</p>
                    `);
                }
            }, 1000);

            // 视频结束
            const endHandler = () => {
                clearInterval(activeTimer);
                activeTimer = null;
                video.removeEventListener('ended', endHandler);
                video.removeEventListener('pause', forcePlay);
                addLog('视频播放完成');
                resolve();
            };
            video.addEventListener('ended', endHandler);
        });
    }

    // 处理PDF
    function handlePDF() {
        return new Promise((resolve) => {
            currentContentType = 'pdf';
            addLog('开始处理PDF，35秒后完成');
            let countdown = 35;

            if (activeTimer) clearInterval(activeTimer);
            
            activeTimer = setInterval(() => {
                countdown--;
                const progress = ((35 - countdown) / 35) * 100;
                updateStatus(`
                    <p>内容类型: PDF</p>
                    <p>处理进度: ${progress.toFixed(1)}%</p>
                    <p>剩余时间: ${countdown}秒</p>
                `);

                if (countdown <= 0) {
                    clearInterval(activeTimer);
                    activeTimer = null;
                    addLog('PDF处理完成');
                    resolve();
                }
            }, 1000);
        });
    }

    // 处理当前内容
    async function processCurrentContent() {
        const contentType = getContentType();
        addLog(`检测到内容类型: ${contentType}`);
        
        switch (contentType) {
            case 'video':
                await handleVideo();
                break;
            case 'pdf':
                await handlePDF();
                break;
            case 'ppt':
                await handlePPT(); // 使用修复后的PPT处理函数
                break;
            default:
                addLog('未知内容类型，35秒后跳过');
                await new Promise(resolve => setTimeout(resolve, 35000));
                break;
        }
    }

    // 任务处理流程
    function goToNextTask() {
        if (taskQueue.length === 0) {
            addLog('所有任务已完成');
            updateStatus('<p>所有任务已完成！</p>');
            return;
        }

        const nextTask = taskQueue.shift();
        const taskText = nextTask.textContent.trim().substring(0, 20) + '...';
        addLog(`准备处理任务: ${taskText}`);
        updateStatus(`<p>准备处理: ${taskText}</p>`);

        // 点击任务
        setTimeout(() => {
            nextTask.click();
            
            // 等待内容加载
            setTimeout(async () => {
                await processCurrentContent();
                // 延迟跳转，确保记录已保存
                setTimeout(goToNextTask, 3000);
            }, 5000); // 等待5秒确保页面加载完成
        }, 1000);
    }

    // 获取任务列表
    function getTaskList() {
        return Array.from(document.querySelectorAll('.third-level-box')).filter(el => {
            const text = el.textContent.toLowerCase();
            return !text.includes('作业') && !text.includes('测验') && !text.includes('考试');
        });
    }

    // 开始任务
    function startTasks() {
        const tasks = getTaskList();
        if (tasks.length === 0) {
            addLog('未找到可处理的任务');
            updateStatus('<p>未找到可处理的任务</p>');
            return;
        }

        // 找到当前活跃任务
        const activeIndex = tasks.findIndex(el => el.classList.contains('active'));
        taskQueue = tasks.slice(activeIndex > -1 ? activeIndex : 0);
        
        addLog(`共找到 ${tasks.length} 个任务，从第 ${activeIndex + 1} 个开始`);
        updateStatus(`
            <p>总任务数: ${tasks.length} 个</p>
            <p>剩余任务: ${taskQueue.length} 个</p>
            <p>开始处理...</p>
        `);

        goToNextTask();
    }

    // 初始化
    function init() {
        // 确保只初始化一次
        if (document.getElementById('sweek-helper-window')) {
            return;
        }

        initWindow();
        addLog('刷课助手已启动（最终修复版）');

        const currentPath = window.location.pathname;
        if (currentPath.includes('/course/detail/courseStudy')) {
            showNotification('已进入课程学习页面，即将开始处理', 3000);
            setTimeout(startTasks, 2000);
        } else if (currentPath.includes('/account/course')) {
            showNotification('请选择要学习的课程', 3000);
        } else {
            showNotification('请先进入"在学课程"页面', 3000);
        }
    }

    // 启动
    init();
})();