// ==UserScript==
// @name         学习通平台全能增强助手
// @namespace    http://tampermonkey.net/
// @version      2.5
// @description  支持学习通自动播放、倍速、跳过弹窗、自动下一节、悬浮控制面板
// @author       学习通增强助手
// @match        *://*.chaoxing.com/*
// @match        *://*.zhihuishu.com/*
// @match        *://u.unipus.cn/*
// @match        *://*.xueqi.cn/*
// @match        *://*.qingshuxuetang.com/*
// @grant        GM_addStyle
// @grant        GM_notification
// @run-at       document-start
// ==/UserScript==

(function () {
    'use strict';

    // 全局配置
    const config = {
        autoPlay: true,        // 自动播放
        autoNext: true,        // 自动下一节
        speed: 2.0,            // 默认倍速
        mute: false,           // 是否静音
        skipAlert: true,       // 自动关闭弹窗
        showPanel: true        // 显示悬浮控制面板
    };

    // 注入悬浮面板样式
    GM_addStyle(`
        #enhance-panel {
            position: fixed;
            top: 20px;
            right: 20px;
            z-index: 999999;
            width: 180px;
            background: #fff;
            border-radius: 10px;
            box-shadow: 0 0 12px rgba(0,0,0,0.2);
            padding: 12px;
            font-size: 14px;
            user-select: none;
        }
        #enhance-panel h4 {
            margin: 0 0 8px 0;
            font-size: 15px;
            color: #333;
            text-align: center;
        }
        .enhance-item {
            margin: 6px 0;
            display: flex;
            justify-content: space-between;
        }
        .enhance-btn {
            padding: 4px 8px;
            background: #409eff;
            color: #fff;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 12px;
        }
        .enhance-btn:hover {
            background: #337ecc;
        }
    `);

    // 创建悬浮控制面板
    function createPanel() {
        if (!config.showPanel) return;
        if (document.querySelector('#enhance-panel')) return;

        const panel = document.createElement('div');
        panel.id = 'enhance-panel';
        panel.innerHTML = `
            <h4>📘 学习增强助手</h4>
            <div class="enhance-item">
                <span>倍速：</span>
                <div>
                    <button class="enhance-btn" speed="1.0">1.0x</button>
                    <button class="enhance-btn" speed="1.5">1.5x</button>
                    <button class="enhance-btn" speed="2.0">2.0x</button>
                </div>
            </div>
            <div class="enhance-item">
                <span>状态：</span>
                <span style="color:#009944">运行中 ✅</span>
            </div>
        `;
        document.body.appendChild(panel);

        // 倍速切换
        panel.querySelectorAll('button[speed]').forEach(btn => {
            btn.addEventListener('click', () => {
                const s = parseFloat(btn.getAttribute('speed'));
                setSpeed(s);
                GM_notification(`已切换至 ${s} 倍速`, '增强助手');
            });
        });
    }

    // 设置视频倍速
    function setSpeed(speed) {
        const videos = document.querySelectorAll('video');
        videos.forEach(v => {
            v.playbackRate = speed;
        });
        config.speed = speed;
    }

    // 自动播放
    function autoPlayVideo() {
        if (!config.autoPlay) return;
        const videos = document.querySelectorAll('video');
        videos.forEach(v => {
            if (v.paused && !v.ended) {
                v.play().catch(() => {});
            }
            v.muted = config.mute;
            v.playbackRate = config.speed;
        });
    }

    // 自动关闭弹窗
    function skipPopups() {
        if (!config.skipAlert) return;
        const closeSelectors = [
            '.popbtn_yes', '.btn-primary', '.btn-ok', '.btn-confirm',
            '.close', '.modal-close', '.icon-close', '.btn-close',
            '.warn_pop .btn', '.alert-wrap .ok', '.btn-primary-green'
        ];
        closeSelectors.forEach(sel => {
            document.querySelectorAll(sel).forEach(el => {
                if (el.offsetParent !== null) el.click();
            });
        });
    }

    // 自动下一节
    function autoNextLesson() {
        if (!config.autoNext) return;
        const nextSelectors = [
            '.nextBtn', '.next', '.btn-next', '.jumpNext',
            '.continue-button', '.next-video', '.next-unit',
            '.play-next', '.n-next', '.toNext'
        ];
        nextSelectors.forEach(sel => {
            const btn = document.querySelector(sel);
            if (btn && btn.offsetParent !== null) {
                setTimeout(() => btn.click(), 800);
                GM_notification('自动进入下一节', '增强助手');
            }
        });
    }

    // 自动完成任务点（学习通专用）
    function autoFinishChaoxing() {
        if (location.host.includes('chaoxing.com')) {
            const job = document.querySelector('.ans-attach-job');
            if (job) job.click();
        }
    }

    // 主循环
    function startEnhance() {
        createPanel();
        autoPlayVideo();
        skipPopups();
        autoFinishChaoxing();

        // 视频结束后自动下一节
        document.querySelectorAll('video').forEach(v => {
            v.addEventListener('ended', () => {
                setTimeout(autoNextLesson, 1000);
            });
        });
    }

    // 持续运行（防止页面动态加载）
    window.addEventListener('load', () => {
        setInterval(startEnhance, 1000);
        console.log('✅ 学习平台增强助手已启动');
    });
})();