// ==UserScript==
// @name         双卫网自动看课 (增强版)
// @namespace    http://tampermonkey.net/
// @version      1.2
// @description  双卫网自动连续播放课程视频，支持课程列表自动遍历
// @author       You
// @match        https://www.sww.com.cn/*
// @match        https://www.shuangwei.cn/*
// @grant        GM_setValue
// @grant        GM_getValue
// @grant        GM_addStyle
// @run-at       document-idle
// @noframes
// ==/UserScript==

(function() {
    'use strict';

    const STORAGE_KEY = 'shuangwei_auto_play_progress';
    const POLL_INTERVAL = 15000;

    let isPlaying = false;
    let currentVideo = null;
    let courseList = [];
    let currentCourseIndex = 0;
    let autoPlayTimer = null;

    function getProgress() {
        try {
            const data = GM_getValue(STORAGE_KEY, '{}');
            return JSON.parse(data);
        } catch (e) {
            return {};
        }
    }

    function saveProgress(courseId, watchedTime) {
        const progress = getProgress();
        progress[courseId] = watchedTime;
        GM_setValue(STORAGE_KEY, JSON.stringify(progress));
        console.log(`进度已保存: 课程${courseId}, 时间${watchedTime}秒`);
    }

    function getLastWatchedTime(courseId) {
        const progress = getProgress();
        return progress[courseId] || 0;
    }

    function showNotification(message, type = 'info') {
        const notification = document.createElement('div');
        notification.style.cssText = `
            position: fixed;
            top: 20px;
            right: 20px;
            padding: 15px 25px;
            background: ${type === 'success' ? '#4CAF50' : type === 'error' ? '#f44336' : '#2196F3'};
            color: white;
            border-radius: 8px;
            font-size: 14px;
            z-index: 10000;
            box-shadow: 0 4px 12px rgba(0,0,0,0.3);
            transition: opacity 0.3s;
        `;
        notification.textContent = message;
        document.body.appendChild(notification);

        setTimeout(() => {
            notification.style.opacity = '0';
            setTimeout(() => notification.remove(), 300);
        }, 3000);
    }

    function addControlPanel() {
        const panel = document.createElement('div');
        panel.id = 'shuangwei-auto-panel';
        panel.style.cssText = `
            position: fixed;
            top: 10px;
            right: 10px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 20px;
            border-radius: 12px;
            z-index: 9999;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            box-shadow: 0 8px 32px rgba(0,0,0,0.3);
            min-width: 300px;
        `;

        panel.innerHTML = `
            <div style="font-size: 18px; font-weight: bold; margin-bottom: 15px; text-align: center;">
                🎓 双卫网自动看课
            </div>
            <div id="shuangwei-status" style="margin-bottom: 15px; padding: 10px; background: rgba(255,255,255,0.1); border-radius: 8px; font-size: 13px;">
                状态: 等待开始
            </div>
            <div id="shuangwei-current" style="margin-bottom: 15px; font-size: 13px;">
                当前课程: 未知
            </div>
            <div id="shuangwei-progress" style="margin-bottom: 15px; font-size: 13px;">
                观看进度: 0%
            </div>
            <div id="shuangwei-courses" style="margin-bottom: 15px; font-size: 13px; max-height: 100px; overflow-y: auto; padding: 5px; background: rgba(255,255,255,0.1); border-radius: 8px;">
                找到 0 个视频
            </div>
            <div style="display: flex; gap: 10px;">
                <button id="shuangwei-start" style="
                    flex: 1;
                    padding: 12px;
                    background: #4CAF50;
                    color: white;
                    border: none;
                    border-radius: 8px;
                    cursor: pointer;
                    font-size: 14px;
                    font-weight: bold;
                    transition: all 0.3s;
                ">▶ 开始</button>
                <button id="shuangwei-stop" style="
                    flex: 1;
                    padding: 12px;
                    background: #f44336;
                    color: white;
                    border: none;
                    border-radius: 8px;
                    cursor: pointer;
                    font-size: 14px;
                    font-weight: bold;
                    transition: all 0.3s;
                ">⏹ 停止</button>
            </div>
            <button id="shuangwei-reset" style="
                width: 100%;
                margin-top: 10px;
                padding: 10px;
                background: #ff9800;
                color: white;
                border: none;
                border-radius: 8px;
                cursor: pointer;
                font-size: 13px;
            ">🔄 重置进度</button>
            <div style="margin-top: 15px; font-size: 11px; opacity: 0.8; text-align: center;">
                提示: 开始前请确保在课程列表页面
            </div>
        `;

        document.body.appendChild(panel);

        document.getElementById('shuangwei-start').addEventListener('click', startAutoPlay);
        document.getElementById('shuangwei-stop').addEventListener('click', stopAutoPlay);
        document.getElementById('shuangwei-reset').addEventListener('click', resetProgress);

        GM_addStyle(`
            #shuangwei-start:hover { background: #45a049 !important; transform: scale(1.02); }
            #shuangwei-stop:hover { background: #da190b !important; transform: scale(1.02); }
            #shuangwei-reset:hover { background: #e68900 !important; }
        `);
    }

    function updateStatus(status) {
        const statusElem = document.getElementById('shuangwei-status');
        if (statusElem) {
            statusElem.textContent = `状态: ${status}`;
        }
    }

    function updateCurrentCourse(courseName) {
        const courseElem = document.getElementById('shuangwei-current');
        if (courseElem) {
            courseElem.textContent = `当前课程: ${courseName}`;
        }
    }

    function updateProgress(percent) {
        const progressElem = document.getElementById('shuangwei-progress');
        if (progressElem) {
            progressElem.textContent = `观看进度: ${percent}%`;
        }
    }

    function updateCourseList(count) {
        const coursesElem = document.getElementById('shuangwei-courses');
        if (coursesElem) {
            coursesElem.textContent = `找到 ${count} 个视频`;
        }
    }

    function findCourseLinks() {
        const links = [];
        
        const courseItems = document.querySelectorAll('.course-list .course-item, [class*="course"], [class*="lesson"], tr[class*="course"], tr[class*="lesson"]');
        
        courseItems.forEach((item, index) => {
            try {
                const linkElem = item.querySelector('a');
                if (linkElem) {
                    const href = linkElem.href;
                    const title = linkElem.textContent.trim() || item.textContent.trim();
                    
                    if (href && title) {
                        links.push({ href, title, index });
                    }
                }
            } catch (e) {
                console.log('查找课程链接失败:', e);
            }
        });

        if (links.length === 0) {
            const allLinks = document.querySelectorAll('a');
            allLinks.forEach((link, index) => {
                const href = link.href;
                const text = link.textContent.trim();
                if (href && text && (text.includes('视频') || text.includes('课程') || text.includes('播放') || text.includes('学习'))) {
                    links.push({ href, title: text, index });
                }
            });
        }

        return links;
    }

    function findVideo() {
        const videos = document.querySelectorAll('video');
        if (videos.length > 0) {
            return videos[0];
        }

        const iframes = document.querySelectorAll('iframe');
        for (const iframe of iframes) {
            const src = iframe.src || iframe.getAttribute('data-src');
            if (src && (src.includes('video') || src.includes('player') || src.includes('embed'))) {
                return iframe;
            }
        }

        return null;
    }

    function getCourseId(url) {
        const match = url.match(/\/(\d+)$/) || url.match(/id=(\d+)/) || url.match(/\/(\d+)\//);
        return match ? match[1] : url;
    }

    function playVideo(video) {
        return new Promise((resolve, reject) => {
            if (!video) {
                reject(new Error('未找到视频元素'));
                return;
            }

            try {
                if (video.tagName === 'VIDEO') {
                    const courseId = getCourseId(window.location.href);
                    const lastWatched = getLastWatchedTime(courseId);

                    if (lastWatched > 0) {
                        video.currentTime = lastWatched;
                        console.log(`从 ${lastWatched} 秒开始播放`);
                    }

                    video.play().then(() => {
                        console.log('视频开始播放');
                        currentVideo = video;

                        const checkProgress = setInterval(() => {
                            if (!isPlaying) {
                                clearInterval(checkProgress);
                                return;
                            }

                            const currentTime = video.currentTime;
                            const duration = video.duration;

                            if (duration && !isNaN(duration)) {
                                const percent = Math.floor((currentTime / duration) * 100);
                                updateProgress(percent);

                                if (currentTime - getLastWatchedTime(courseId) > 5) {
                                    saveProgress(courseId, currentTime);
                                }

                                if (currentTime >= duration - 2) {
                                    clearInterval(checkProgress);
                                    console.log('视频播放完成');
                                    saveProgress(courseId, duration);
                                    resolve(true);
                                }
                            }
                        }, POLL_INTERVAL);

                    }).catch(err => {
                        console.error('播放失败:', err);
                        reject(err);
                    });

                } else if (video.tagName === 'IFRAME') {
                    console.log('视频在iframe中，尝试等待...');
                    updateStatus('视频在iframe中，请在iframe内手动播放');
                    setTimeout(() => resolve(true), 30000);
                }

            } catch (error) {
                console.error('播放出错:', error);
                reject(error);
            }
        });
    }

    function navigateTo(url) {
        return new Promise(resolve => {
            window.location.href = url;
            const checkUrl = setInterval(() => {
                if (window.location.href === url || window.location.href.includes(url)) {
                    clearInterval(checkUrl);
                    setTimeout(resolve, 3000);
                }
            }, 1000);
        });
    }

    async function startAutoPlay() {
        if (isPlaying) {
            showNotification('已经在运行中', 'info');
            return;
        }

        courseList = findCourseLinks();
        if (courseList.length === 0) {
            showNotification('未找到课程链接，请确保在课程列表页面', 'error');
            return;
        }

        updateCourseList(courseList.length);
        isPlaying = true;
        updateStatus('自动播放中...');
        showNotification(`开始自动播放 ${courseList.length} 个视频`, 'success');

        try {
            for (let i = 0; i < courseList.length && isPlaying; i++) {
                currentCourseIndex = i;
                const course = courseList[i];
                
                updateStatus(`正在播放第 ${i + 1}/${courseList.length} 个视频`);
                updateCurrentCourse(course.title);

                console.log(`正在打开: ${course.title} (${course.href})`);
                await navigateTo(course.href);

                const video = findVideo();
                if (video) {
                    try {
                        await playVideo(video);
                    } catch (err) {
                        console.error(`视频 ${i + 1} 播放失败:`, err);
                        showNotification(`视频 ${i + 1} 播放失败: ${err.message}`, 'error');
                    }
                } else {
                    showNotification('未找到视频元素', 'error');
                    await new Promise(resolve => setTimeout(resolve, 5000));
                }

                if (i < courseList.length - 1 && isPlaying) {
                    console.log('返回课程列表...');
                    window.history.back();
                    await new Promise(resolve => setTimeout(resolve, 3000));
                }
            }

            if (isPlaying) {
                showNotification('所有视频播放完成！', 'success');
                updateStatus('播放完成');
            }

        } catch (error) {
            console.error('自动播放出错:', error);
            showNotification('播放出错: ' + error.message, 'error');
        } finally {
            isPlaying = false;
        }
    }

    function stopAutoPlay() {
        isPlaying = false;
        updateStatus('已停止');

        if (currentVideo) {
            currentVideo.pause();
        }

        showNotification('已停止自动播放', 'info');
    }

    function resetProgress() {
        if (confirm('确定要重置所有观看进度吗？')) {
            GM_setValue(STORAGE_KEY, '{}');
            showNotification('进度已重置', 'success');
            updateProgress(0);
        }
    }

    function init() {
        if (document.getElementById('shuangwei-auto-panel')) {
            return;
        }

        addControlPanel();
        updateStatus('准备就绪');

        console.log('双卫网自动看课脚本已加载');
    }

    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', init);
    } else {
        init();
    }

})();