// ==UserScript==
// @name         上海大学继续教育学院自动刷课，倍速，自动换课
// @namespace    一心向善
// @namespace    https://www.icce.shu.edu.cn
// @version      1.5.0
// @description  自动、倍速播放、自动下一页【可用于：上海大学继续教育学院继续教育管理平台|上海立信会计金融学院|上海理工大学|韩山师范学院|广州软件学院|上海出版印刷高等专科学校|广东职业技术学院|华南农业大学继续教育学院|开封大学继续教育学院|东华大学网络教育学院考试系统|广州学涯|华南农业大学|东华大学|延安大学|上海应用技术大学等】
// @author       Your Name
// @match        *://*.learnin.com.cn/*
// @grant        none
// @run-at       document-end
// ==/UserScript==

(function() {
    'use strict';

    // ============= 配置 =============
    const DEFAULT_SPEED = 1;       // 默认倍速
    const CHECK_INTERVAL = 300;    // 检查间隔(毫秒)
    const END_CHECK_DELAY = 1000;  // 视频结束后等待多久再跳转

    // ============= 状态 =============
    let currentSpeed = DEFAULT_SPEED;
    let panel = null;
    let lastVideoTime = 0;
    let videoEnded = false;
    let videoEndedTimer = null;
    let isPanelMinimized = false;

    // 拖动相关
    let isDragging = false;
    let dragOffsetX = 0;
    let dragOffsetY = 0;
    let panelX = 20;
    let panelY = 20;

    // ============= 启动日志 =============
    console.log('%c🔥🔥🔥 天府上海大学视频助手 v1.5 启动！🔥🔥🔥', 'color:red;font-size:20px;font-weight:bold;');
    console.log('当前页面URL:', window.location.href);

    // ============= 创建控制面板 =============
    function createPanel() {
        if (document.getElementById('learnin-helper-v8')) {
            return;
        }

        panel = document.createElement('div');
        panel.id = 'learnin-helper-v8';
        panel.style.cssText = `
            position: fixed !important;
            left: ${panelX}px !important;
            top: ${panelY}px !important;
            z-index: 2147483647 !important;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
            color: #ffffff !important;
            padding: 0 !important;
            border-radius: 15px !important;
            font-family: Arial, sans-serif !important;
            font-size: 14px !important;
            box-shadow: 0 10px 40px rgba(0,0,0,0.3) !important;
            min-width: 300px !important;
            user-select: none !important;
        `;

        panel.innerHTML = `
            <div id="panel-header-v8" style="padding: 12px 15px; background: rgba(0,0,0,0.2); border-radius: 15px 15px 0 0; cursor: move; display: flex; justify-content: space-between; align-items: center;">
                <span style="font-weight: bold; font-size: 16px;">🎬 天府上海大学视频助手</span>
                <button id="toggle-btn-v8" style="background: rgba(255,255,255,0.3); border: none; color: white; padding: 4px 10px; border-radius: 5px; cursor: pointer; font-size: 12px;">−</button>
            </div>
            <div id="panel-controls-v8" style="padding: 15px;">
                <div style="margin-bottom: 15px;">
                    <div style="margin-bottom: 5px; font-weight: bold;">
                        播放速度: <span id="speed-val-v8" style="font-size: 28px;">${DEFAULT_SPEED}</span>x
                    </div>
                    <input type="range" id="speed-range-v8" min="1" max="16" step="0.5" value="${DEFAULT_SPEED}"
                           style="width: 100%; cursor: pointer; height:8px;">
                </div>
                <div style="display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 15px;">
                    <button class="sp-v8" data-sp="1" style="flex:1; min-width:50px; padding:10px; background:#333; color:#fff; border:none; border-radius:8px; cursor:pointer; font-weight:bold;">1x</button>
                    <button class="sp-v8" data-sp="2" style="flex:1; min-width:50px; padding:10px; background:#333; color:#fff; border:none; border-radius:8px; cursor:pointer; font-weight:bold;">2x</button>
                    <button class="sp-v8" data-sp="4" style="flex:1; min-width:50px; padding:10px; background:#333; color:#fff; border:none; border-radius:8px; cursor:pointer; font-weight:bold;">4x</button>
                    <button class="sp-v8" data-sp="8" style="flex:1; min-width:50px; padding:10px; background:#333; color:#fff; border:none; border-radius:8px; cursor:pointer; font-weight:bold;">8x</button>
                    <button class="sp-v8" data-sp="16" style="flex:1; min-width:50px; padding:10px; background:#333; color:#fff; border:none; border-radius:8px; cursor:pointer; font-weight:bold;">16x</button>
                </div>
                <div id="status-v8" style="background: rgba(255,255,255,0.2); padding: 10px; border-radius: 8px; font-size: 12px; max-height: 120px; overflow-y: auto; margin-bottom: 10px;">
                    初始化中...
                </div>
            </div>
            <div id="panel-info-v8" style="padding: 0 15px 15px 15px;">
                <div style="background: rgba(0,0,0,0.2); padding: 12px; border-radius: 8px; font-size: 13px; line-height: 1.6;">
                    1、本脚本仅适用于处理视频；<br>
                    <span style="color: #ffff00; font-weight: bold; text-shadow: 0 0 5px #ffff00;">
                        2、如需处理答题、考试等联系：TFJYPXJG
                    </span>
                </div>
            </div>
        `;

        document.body.appendChild(panel);
        console.log('✅ 控制面板已创建！');

        bindEvents();
    }

    // ============= 添加日志到状态栏 =============
    let logLines = [];
    function addStatusLog(text) {
        const now = new Date().toLocaleTimeString();
        logLines.unshift(`[${now}] ${text}`);
        if (logLines.length > 10) logLines.pop();

        const statusEl = document.getElementById('status-v8');
        if (statusEl) {
            statusEl.innerHTML = logLines.join('<br>');
        }
        console.log('📝', text);
    }

    // ============= 设置视频速度 =============
    function setSpeed(sp) {
        currentSpeed = sp;

        const speedVal = document.getElementById('speed-val-v8');
        const speedRange = document.getElementById('speed-range-v8');
        if (speedVal) speedVal.textContent = sp;
        if (speedRange) speedRange.value = sp;

        const videos = document.querySelectorAll('video');
        videos.forEach(video => {
            video.playbackRate = sp;
        });

        addStatusLog(`设置倍速: ${sp}x`);
    }

    // ============= 查找所有可能的下一页按钮 =============
    function findAllNextButtons() {
        const all = Array.from(document.querySelectorAll('button, a'));

        const keywords = [
            '下一页', '下一节', '下一章', 'next', 'Next', 'NEXT',
            '下一个', 'Next lesson', 'Next chapter'
        ];

        return all.filter(el => {
            const t = el.textContent.trim();
            return keywords.some(k => t.includes(k));
        });
    }

    // ============= 查找播放按钮 =============
    function findPlayButtons() {
        const all = Array.from(document.querySelectorAll('button'));
        const keywords = ['Play', 'Play Video', '播放', '▶', '►'];

        return all.filter(el => {
            const t = el.textContent.trim();
            return keywords.some(k => t.includes(k));
        });
    }

    // ============= 绑定事件 =============
    function bindEvents() {
        // 快捷按钮
        document.querySelectorAll('.sp-v8').forEach(btn => {
            btn.addEventListener('click', () => {
                const sp = parseFloat(btn.dataset.sp);
                setSpeed(sp);
            });
        });

        // 滑块
        const range = document.getElementById('speed-range-v8');
        range.addEventListener('input', (e) => {
            const sp = parseFloat(e.target.value);
            setSpeed(sp);
        });

        // 最小化/还原按钮 - 只隐藏控制部分，保留说明
        const toggleBtn = document.getElementById('toggle-btn-v8');
        const controls = document.getElementById('panel-controls-v8');
        toggleBtn.addEventListener('click', () => {
            isPanelMinimized = !isPanelMinimized;
            if (isPanelMinimized) {
                controls.style.display = 'none';
                toggleBtn.textContent = '+';
                addStatusLog('控制区已隐藏');
            } else {
                controls.style.display = 'block';
                toggleBtn.textContent = '−';
                addStatusLog('控制区已展开');
            }
        });

        // 拖动功能
        const header = document.getElementById('panel-header-v8');

        header.addEventListener('mousedown', (e) => {
            isDragging = true;
            const rect = panel.getBoundingClientRect();
            dragOffsetX = e.clientX - rect.left;
            dragOffsetY = e.clientY - rect.top;
            panel.style.cursor = 'grabbing';
        });

        document.addEventListener('mousemove', (e) => {
            if (!isDragging) return;

            panelX = e.clientX - dragOffsetX;
            panelY = e.clientY - dragOffsetY;

            // 限制边界，防止拖出屏幕
            panelX = Math.max(0, Math.min(window.innerWidth - panel.offsetWidth, panelX));
            panelY = Math.max(0, Math.min(window.innerHeight - panel.offsetHeight, panelY));

            panel.style.left = panelX + 'px';
            panel.style.top = panelY + 'px';
        });

        document.addEventListener('mouseup', () => {
            isDragging = false;
            panel.style.cursor = 'default';
        });

        // 防止在其他元素上释放时的问题
        document.addEventListener('mouseleave', () => {
            isDragging = false;
            panel.style.cursor = 'default';
        });
    }

    // ============= 处理视频结束 =============
    function handleVideoEnded(video) {
        if (videoEnded) return;

        videoEnded = true;
        addStatusLog('🎬 视频即将结束！');

        if (videoEndedTimer) {
            clearTimeout(videoEndedTimer);
        }

        videoEndedTimer = setTimeout(() => {
            const nextButtons = findAllNextButtons();
            addStatusLog(`🔍 找到 ${nextButtons.length} 个下一页按钮`);

            if (nextButtons.length > 0) {
                const btn = nextButtons[0];
                addStatusLog(`✅ 点击: ${btn.textContent.trim()}`);
                btn.click();

                setTimeout(() => {
                    videoEnded = false;
                }, 2000);
            } else {
                addStatusLog('❌ 没找到下一页按钮');
                videoEnded = false;
            }
        }, END_CHECK_DELAY);
    }

    // ============= 主循环 =============
    function mainLoop() {
        // 确保面板存在
        if (!panel || !document.body.contains(panel)) {
            createPanel();
        }

        // 处理所有视频
        const videos = document.querySelectorAll('video');
        videos.forEach(video => {
            // 强制速度
            if (video.playbackRate !== currentSpeed) {
                video.playbackRate = currentSpeed;
            }

            // 检查视频播放状态
            if (video.paused && !video.ended) {
                const playBtns = findPlayButtons();
                if (playBtns.length > 0) {
                    playBtns[0].click();
                    addStatusLog('▶️ 点击播放按钮');
                } else {
                    video.play().catch(() => {});
                }
            }

            // 检查视频是否接近结束
            const nearEnd = video.duration > 0 && video.currentTime > video.duration - 2;
            const isActuallyEnded = video.ended;

            if (nearEnd || isActuallyEnded) {
                handleVideoEnded(video);
            }

            lastVideoTime = video.currentTime;
        });

        if (videos.length > 0 && !isPanelMinimized) {
            const v = videos[0];
            const percent = v.duration > 0 ? Math.round((v.currentTime / v.duration) * 100) : 0;
            addStatusLog(`播放进度: ${percent}% | ${Math.round(v.currentTime)}s / ${Math.round(v.duration)}s`);
        }
    }

    // ============= 启动 =============
    function start() {
        createPanel();
        setSpeed(DEFAULT_SPEED);
        addStatusLog('✅ 助手启动成功！拖动标题栏可移动面板');

        setInterval(mainLoop, CHECK_INTERVAL);
    }

    setTimeout(start, 1000);
})();