// ==UserScript==
// @name         江苏开放大学自动刷课脚本
// @namespace    http://tampermonkey.net/
// @version      1.6
// @description  江苏开放大学相关视频自动学习自动看视频程序【可加速及自动下一页】
// @author       一心向善
// @match        http://xuexi.jsou.cn/jxpt-web/student/*
// @match        https://xuexi.jsou.cn/jxpt-web/student/*
// @grant        unsafeWindow
// @grant        GM_setValue
// @grant        GM_getValue
// @license      MIT
// ==/UserScript==

(function() {
    'use strict';

    // ====== 状态 ======
    var autoPlayEnabled = GM_getValue('autoPlayEnabled', true);
    var autoNextEnabled = GM_getValue('autoNextEnabled', true);
    var autoMuteEnabled = GM_getValue('autoMuteEnabled', true);  // 默认静音
    var speedValue      = GM_getValue('speedValue', 2);

    // ====== 自动静音（默认开启）======
    function autoMuteVideo() {
        // 立即尝试一次
        (function tryMute() {
            var v = document.querySelector('video');
            if (v) {
                if (autoMuteEnabled) v.muted = true;
                v.setAttribute('muted', autoMuteEnabled ? 'muted' : '');
            }
        })();
        // 持续兜底：防止平台/浏览器自动取消静音或 video 异步加载
        setInterval(() => {
            var v = document.querySelector('video');
            if (v && autoMuteEnabled && !v.muted) v.muted = true;
        }, 800);
    }

    // ====== 自动播放 ======
    function autoPlayVideo() {
        if (!autoPlayEnabled) return;
        setInterval(() => {
            var video = document.querySelector('video');
            if (video && video.paused) video.play();
        }, 1000);
    }

    // ====== 倍速 ======
    function setSpeed(speed) {
        speedValue = speed;
        GM_setValue('speedValue', speed);
        var video = document.querySelector('video');
        if (video) video.playbackRate = speed;
        // 更新按钮高亮
        document.querySelectorAll('[data-speed]').forEach(function (btn) {
            if (parseFloat(btn.getAttribute('data-speed')) === speed) {
                btn.classList.add('speed-active');
            } else {
                btn.classList.remove('speed-active');
            }
        });
    }

    // ====== 自动下一节 ======
    function autoNextPage() {
        if (!autoNextEnabled) return;
        setInterval(() => {
            var video = document.querySelector('video');
            if (video && video.ended) {
                // 查找多种可能的"下一节"按钮
                var nextBtn = document.querySelector('.next-activity')
                         || document.querySelector('[title="下一节"]')
                         || document.querySelector('a[href*="next"]');
                if (!nextBtn) {
                    var links = document.querySelectorAll('a');
                    for (var i = 0; i < links.length; i++) {
                        if (links[i].textContent && links[i].textContent.indexOf('下一节') !== -1) {
                            nextBtn = links[i];
                            break;
                        }
                    }
                }
                if (nextBtn) {
                    setTimeout(() => nextBtn.click(), 1500);
                } else {
                    setTimeout(() => window.location.reload(), 1500);
                }
            }
        }, 2000);
    }

    // ====== 控制面板注入（全新样式）======
    function InjectPanel() {
        /* ---------- 外层容器 ---------- */
        var panel = document.createElement('div');
        panel.id = 'study-helper-panel';
        panel.style.cssText = [
            'position:fixed',
            'right:28px',
            'bottom:28px',
            'z-index:99999',
            'width:300px',
            'padding:0',
            'background:linear-gradient(160deg, rgba(30,27,75,0.92) 0%, rgba(49,46,129,0.88) 100%)',
            'backdrop-filter:blur(14px)',
            '-webkit-backdrop-filter:blur(14px)',
            'border:1px solid rgba(139,92,246,0.35)',
            'border-radius:18px',
            'box-shadow:0 20px 50px rgba(79,70,229,0.25), 0 0 0 1px rgba(255,255,255,0.04) inset',
            'font-family:"PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,sans-serif',
            'font-size:13px',
            'color:#E5E7EB',
            'line-height:1.6',
            'overflow:hidden',
            'user-select:none'
        ].join(';');

        /* ---------- 拖拽（DOM Level 0 事件模型，与脚本一致，适配油猴沙盒环境）---------- */
        var drag = false, ox = 0, oy = 0, moved = false, movedX = 0, movedY = 0;
        var DRAG_THRESHOLD = 5; // 像素：超过阈值判定为拖拽（避免松手误触发折叠）

        /* ---------- 顶部彩色标题条（作为拖动手柄）---------- */
        var header = document.createElement('div');
        header.style.cssText = [
            'background:linear-gradient(90deg,#6366F1 0%,#8B5CF6 50%,#A78BFA 100%)',
            'padding:14px 18px',
            'cursor:move',
            'display:flex',
            'align-items:center',
            'justify-content:space-between',
            'font-weight:600',
            'font-size:14px',
            'color:#fff',
            'letter-spacing:0.5px'
        ].join(';');
        var titleLeft = document.createElement('span');
        titleLeft.innerHTML = '&#9679; 学习辅助面板';
        header.appendChild(titleLeft);

        // 折叠按钮（独立按钮，不走拖拽）
        var toggleBtn = document.createElement('span');
        toggleBtn.textContent = '—';
        toggleBtn.style.cssText = 'cursor:pointer;opacity:0.85;font-size:18px;line-height:1;padding:0 4px;';
        var collapsed = false;
        var bodyWrap = null;
        toggleBtn.onclick = function () {
            // 若刚发生过真正的拖动，不响应这次 click（避免拖完误折叠）
            var dx = Math.abs(movedX), dy = Math.abs(movedY);
            if (dx > DRAG_THRESHOLD || dy > DRAG_THRESHOLD) return;
            collapsed = !collapsed;
            if (bodyWrap) {
                bodyWrap.style.display = collapsed ? 'none' : 'block';
                toggleBtn.textContent = collapsed ? '+' : '—';
            }
        };
        header.appendChild(toggleBtn);
        panel.appendChild(header);

        // ========= 核心拖拽：DOM Level 0 赋值方式（脚本同款，兼容性最强） =========
        // 作用于整个 header（标题条区域），用闭包直接引用当前的 panel / toggleBtn
        header.onmousedown = function (e) {
            var t = e && e.target;
            // 点在折叠按钮及其子节点上 → 不进入拖拽
            if (t && toggleBtn && (t === toggleBtn || toggleBtn.contains(t))) return;

            e = e || window.event;
            // 阻止浏览器默认拖拽（文本选中/图片拖动）
            if (e.preventDefault) e.preventDefault(); else e.returnValue = false;
            if (e.stopPropagation) e.stopPropagation();

            drag  = true;
            moved = false;
            movedX = 0;
            movedY = 0;

            var rect = panel.getBoundingClientRect();
            // 在 mousedown 瞬间就把 right/bottom 定位切换成 left/top，并锁位，避免首次跳点
            panel.style.right  = 'auto';
            panel.style.bottom = 'auto';
            panel.style.left   = rect.left + 'px';
            panel.style.top    = rect.top  + 'px';

            // 计算鼠标相对 panel 左上角的偏移量
            ox = (e.clientX || (e.touches && e.touches[0] && e.touches[0].clientX) || 0) - rect.left;
            oy = (e.clientY || (e.touches && e.touches[0] && e.touches[0].clientY) || 0) - rect.top;

            // 全局 mousemove：直接覆盖 document.onmousemove（与脚本一致，沙盒环境可靠）
            var prevMove = document.onmousemove;
            document.onmousemove = function (ev) {
                if (!drag) { if (prevMove) return prevMove.apply(this, arguments); }
                ev = ev || window.event;
                var cx = ev.clientX || (ev.touches && ev.touches[0] && ev.touches[0].clientX) || 0;
                var cy = ev.clientY || (ev.touches && ev.touches[0] && ev.touches[0].clientY) || 0;
                var nx = cx - ox;
                var ny = cy - oy;
                movedX = nx - rect.left;
                movedY = ny - rect.top;

                // 视口边界保护
                var w = panel.offsetWidth  || 300;
                var h = panel.offsetHeight || 200;
                var maxX = Math.max(0, (window.innerWidth  || document.documentElement.clientWidth)  - w);
                var maxY = Math.max(0, (window.innerHeight || document.documentElement.clientHeight) - h);
                if (nx < 0) nx = 0; else if (nx > maxX) nx = maxX;
                if (ny < 0) ny = 0; else if (ny > maxY) ny = maxY;

                panel.style.left = nx + 'px';
                panel.style.top  = ny + 'px';
                moved = true;
                if (ev.preventDefault) ev.preventDefault();
            };

            // 全局 mouseup：结束拖拽，恢复之前的 onmousemove（若有）
            var prevUp = document.onmouseup;
            document.onmouseup = function () {
                drag = false;
                document.onmousemove = prevMove || null;
                document.onmouseup   = prevUp   || null;
            };
        };

        /* ---------- 主体内容 ---------- */
        bodyWrap = document.createElement('div');
        bodyWrap.style.cssText = 'padding:16px 18px 18px;';

        // === 区块：播放控制 ===
        var playSection = document.createElement('div');
        playSection.style.marginBottom = '16px';

        var playTitle = document.createElement('div');
        playTitle.style.cssText = 'display:flex;align-items:center;gap:6px;margin-bottom:10px;color:#A5B4FC;font-weight:500;font-size:12px;';
        playTitle.innerHTML = '<span style="display:inline-block;width:3px;height:12px;background:linear-gradient(180deg,#6366F1,#A78BFA);border-radius:2px;"></span>播放行为';
        playSection.appendChild(playTitle);

        // 开关 1：自动播放
        var sw1 = document.createElement('label');
        sw1.style.cssText = 'display:flex;align-items:center;justify-content:space-between;padding:8px 10px;background:rgba(255,255,255,0.04);border:1px solid rgba(255,255,255,0.06);border-radius:10px;margin-bottom:8px;cursor:pointer;transition:all .2s;';
        sw1.innerHTML = '<span>&#9654; 自动续播视频</span>';
        var c1 = document.createElement('input');
        c1.type = 'checkbox';
        c1.checked = autoPlayEnabled;
        c1.style.cssText = 'appearance:none;-webkit-appearance:none;width:38px;height:20px;background:#475569;border-radius:999px;position:relative;outline:none;cursor:pointer;transition:all .25s;vertical-align:middle;';
        // 自定义 checkbox 样式规则（通过 innerHTML style）
        c1.addEventListener('change', function () {
            autoPlayEnabled = c1.checked;
            GM_setValue('autoPlayEnabled', c1.checked);
            // 视觉反馈
        });
        sw1.appendChild(c1);
        playSection.appendChild(sw1);

        // 开关 2：自动下一节
        var sw2 = document.createElement('label');
        sw2.style.cssText = 'display:flex;align-items:center;justify-content:space-between;padding:8px 10px;background:rgba(255,255,255,0.04);border:1px solid rgba(255,255,255,0.06);border-radius:10px;cursor:pointer;transition:all .2s;';
        sw2.innerHTML = '<span>&#9193; 播完自动进入下一节</span>';
        var c2 = document.createElement('input');
        c2.type = 'checkbox';
        c2.checked = autoNextEnabled;
        c2.style.cssText = 'appearance:none;-webkit-appearance:none;width:38px;height:20px;background:#475569;border-radius:999px;position:relative;outline:none;cursor:pointer;transition:all .25s;vertical-align:middle;';
        c2.addEventListener('change', function () {
            autoNextEnabled = c2.checked;
            GM_setValue('autoNextEnabled', c2.checked);
        });
        sw2.appendChild(c2);
        playSection.appendChild(sw2);

        // 开关 3：自动静音
        var sw3 = document.createElement('label');
        sw3.style.cssText = 'display:flex;align-items:center;justify-content:space-between;padding:8px 10px;background:rgba(255,255,255,0.04);border:1px solid rgba(255,255,255,0.06);border-radius:10px;margin-top:8px;cursor:pointer;transition:all .2s;';
        sw3.innerHTML = '<span>&#128263; 视频自动静音（默认开启）</span>';
        var c3 = document.createElement('input');
        c3.type = 'checkbox';
        c3.checked = autoMuteEnabled;
        c3.style.cssText = 'appearance:none;-webkit-appearance:none;width:38px;height:20px;background:#475569;border-radius:999px;position:relative;outline:none;cursor:pointer;transition:all .25s;vertical-align:middle;';
        c3.addEventListener('change', function () {
            autoMuteEnabled = c3.checked;
            GM_setValue('autoMuteEnabled', c3.checked);
            // 立即同步到当前视频
            var v = document.querySelector('video');
            if (v) v.muted = autoMuteEnabled;
        });
        sw3.appendChild(c3);
        playSection.appendChild(sw3);

        bodyWrap.appendChild(playSection);

        // === 区块：倍速 ===
        var speedSection = document.createElement('div');
        speedSection.style.marginBottom = '8px';

        var speedTitle = document.createElement('div');
        speedTitle.style.cssText = 'display:flex;align-items:center;gap:6px;margin-bottom:10px;color:#A5B4FC;font-weight:500;font-size:12px;';
        speedTitle.innerHTML = '<span style="display:inline-block;width:3px;height:12px;background:linear-gradient(180deg,#F59E0B,#F472B6);border-radius:2px;"></span>播放速度';
        speedSection.appendChild(speedTitle);

        var speedBar = document.createElement('div');
        speedBar.style.cssText = 'display:grid;grid-template-columns:repeat(5,1fr);gap:6px;';
        [0.5, 1.0, 1.25, 1.5, 2.0].forEach(function (s) {
            var btn = document.createElement('button');
            btn.textContent = s + 'x';
            btn.setAttribute('data-speed', s);
            var isActive = Math.abs(parseFloat(s) - speedValue) < 0.001;
            if (isActive) btn.classList.add('speed-active');
            btn.style.cssText = [
                'padding:7px 0',
                'border-radius:9px',
                'border:1px solid rgba(139,92,246,0.35)',
                'background:rgba(255,255,255,0.04)',
                'color:#C7D2FE',
                'cursor:pointer',
                'font-size:12px',
                'font-weight:500',
                'transition:all .2s',
                'outline:none'
            ].join(';');
            btn.addEventListener('mouseenter', function () {
                if (!btn.classList.contains('speed-active')) {
                    btn.style.background = 'rgba(139,92,246,0.2)';
                    btn.style.color = '#fff';
                }
            });
            btn.addEventListener('mouseleave', function () {
                if (!btn.classList.contains('speed-active')) {
                    btn.style.background = 'rgba(255,255,255,0.04)';
                    btn.style.color = '#C7D2FE';
                }
            });
            btn.addEventListener('click', function () { setSpeed(s); });
            speedBar.appendChild(btn);
        });
        speedSection.appendChild(speedBar);

        bodyWrap.appendChild(speedSection);

        // === 基础功能说明 ===
        var statusBar = document.createElement('div');
        statusBar.style.cssText = 'margin-top:14px;padding:10px 12px;background:rgba(99,102,241,0.1);border:1px dashed rgba(139,92,246,0.4);border-radius:10px;font-size:11.5px;color:#C4B5FD;line-height:1.8;';
        statusBar.innerHTML = ''
            + '<b style="color:#E0E7FF;">基础功能：</b><br>'
            + '1、播放完毕自动下一页<br>'
            + '2、倍数可自由调节，建议最大调节到2倍即可；<br>'
            + '3、答题及线上实验实践、文件题等进群：949193546 联系群主<br>'
            + '<div style="margin-top:4px;padding:4px 8px;background:linear-gradient(90deg,rgba(255,193,7,0.18),rgba(255,193,7,0.08));border-left:3px solid #ffc107;border-radius:3px;font-weight:bold;color:#FDE68A;">'
            + '4、个人合作或教务处理加作者QQ：640105435'
            + '</div>';
        bodyWrap.appendChild(statusBar);

        panel.appendChild(bodyWrap);

        /* ---------- 注入自定义开关（滑块）样式 ---------- */
        var styleTag = document.createElement('style');
        styleTag.textContent = [
            '#study-helper-panel input[type="checkbox"]::before{content:"";position:absolute;width:14px;height:14px;background:#fff;border-radius:50%;top:3px;left:3px;transition:all .25s;box-shadow:0 1px 3px rgba(0,0,0,.3);}',
            '#study-helper-panel input[type="checkbox"]:checked{background:linear-gradient(90deg,#6366F1,#8B5CF6)!important;}',
            '#study-helper-panel input[type="checkbox"]:checked::before{left:21px;}',
            '#study-helper-panel label:hover{background:rgba(255,255,255,0.07)!important;}',
            '#study-helper-panel [data-speed].speed-active{background:linear-gradient(135deg,#6366F1 0%,#8B5CF6 100%)!important;color:#fff!important;border-color:transparent!important;box-shadow:0 4px 12px rgba(99,102,241,.35);}'
        ].join('');
        document.head.appendChild(styleTag);

        document.body.appendChild(panel);
    }

    // ====== 主入口 ======
    function MainRun() {
        if (location.href.indexOf('display') !== -1) {
            InjectPanel();
            autoMuteVideo();   // 自动静音（先执行，尽早生效）
            autoPlayVideo();
            autoNextPage();
            // 延迟一点等 video 元素就绪再设置倍速
            setTimeout(function () { setSpeed(speedValue); }, 500);
            // 兜底：若 video 后出现再设一次倍速 + 静音
            var tryCnt = 0;
            var t = setInterval(function () {
                tryCnt++;
                var v = document.querySelector('video');
                if (v) {
                    if (v.playbackRate !== speedValue) v.playbackRate = speedValue;
                    if (autoMuteEnabled && !v.muted) v.muted = true;
                }
                if (tryCnt >= 15) clearInterval(t);
            }, 1500);
        }
    }

    MainRun();
})();