// ==UserScript==
// @name         生态环境云课堂自动学习助手
// @namespace    http://onlinelearning.21tb.com/
// @version      3.5
// @description  全国生态环境执法培训云课堂全自动学习：递归遍历iframe、精准关弹窗、自动循环学完所有必修、静音后台运行、全答完再提交
// @author       study_bot
// @match        *://onlinelearning.21tb.com/*
// @grant        none
// @run-at       document-idle
// @tag          教育,学习,自动化,网课,云课堂
// ==/UserScript==
(function() {
    'use strict';
    const CONFIG = { checkInterval: 4000, actionCooldown: 15000 };
    const state = {
        lastActionTime: 0,
        visitedCourses: new Set(JSON.parse(localStorage.getItem('visitedCourses') || '[]'))
    };
    function log(msg) { console.log(`[自动学习v3.5] ${new Date().toLocaleTimeString()} | ${msg}`); }
    // 递归获取所有frame文档
    function getAllDocs() {
        const docs = [document];
        document.querySelectorAll('iframe').forEach(fr => {
            try { if (fr.contentDocument) docs.push(fr.contentDocument); } catch(e) {}
        });
        return docs;
    }
    // 1. 精准关闭所有弹窗
    function closePopups() {
        getAllDocs().forEach(doc => {
            try {
                // 通知弹窗关闭按钮
                doc.querySelectorAll('button[aria-label="Close"], .el-dialog__close, .modal-close, .el-icon-close, button:has-text("关闭窗口")').forEach(btn => {
                    if (btn.offsetParent) { btn.click(); log('关闭弹窗'); }
                });
                // 点遮罩层
                const modals = doc.querySelectorAll('.el-dialog__wrapper, .el-overlay');
                modals.forEach(m => { if (getComputedStyle(m).display !== 'none') m.click(); });
            } catch(e) {}
        });
    }
    // 2. 静音播放所有视频
    function playVideo() {
        getAllDocs().forEach(doc => {
            doc.querySelectorAll('video').forEach(v => {
                v.muted = true; v.volume = 0; v.playbackRate = 1.0;
                if (v.paused) v.play().catch(()=>{});
            });
        });
    }
    // 3. 在课程列表页选未完成的必修课
    function pickNextCourse() {
        const now = Date.now();
        if (now - state.lastActionTime < CONFIG.actionCooldown) return;
        getAllDocs().forEach(doc => {
            try {
                if (!doc.location.href.includes('course_manage_user_pc')) return;
                // 所有课程卡片按钮
                const cards = [...doc.querySelectorAll('button')].filter(b => b.innerText && b.offsetParent);
                for (let c of cards) {
                    const t = c.innerText;
                    // 条件：是必修课、0%/未完成、不是已完成、没学过
                    if (t.includes('必修') && !t.includes('已完成') && (t.includes('0.0%') || t.includes('未学习')) && !state.visitedCourses.has(t.slice(0,30))) {
                        log('点未学必修课: ' + t.split('\n')[0]);
                        c.click();
                        state.visitedCourses.add(t.slice(0,30));
                        localStorage.setItem('visitedCourses', JSON.stringify([...state.visitedCourses]));
                        state.lastActionTime = now;
                        return;
                    }
                }
            } catch(e) {}
        });
    }
    // 4. 播放页切下一节/未完成章节
    function nextSection() {
        const now = Date.now();
        if (now - state.lastActionTime < CONFIG.actionCooldown) return;
        getAllDocs().forEach(doc => {
            try {
                if (!doc.location.href.includes('courseLearning/play')) return;
                // 优先点绿色"下一节"按钮
                const nextBtn = [...doc.querySelectorAll('button')].find(el => el.innerText?.trim() === '下一节' && el.offsetParent && !el.disabled);
                if (nextBtn) { log('点下一节'); nextBtn.click(); state.lastActionTime = now; return; }
                // 找右侧"未完成"章节
                const unDone = [...doc.querySelectorAll('span, div')].filter(el => el.innerText?.trim() === '未完成' && el.offsetParent);
                for (let el of unDone) {
                    let p = el.parentElement;
                    for (let i=0;i<6;i++) {
                        if (!p) break;
                        if (p.tagName === 'LI' || p.tagName === 'A' || p.tagName === 'BUTTON') { p.click(); state.lastActionTime = now; log('点未完成章节'); return; }
                        p = p.parentElement;
                    }
                }
                // 课程学完返回列表
                if (doc.body.innerText.includes('本课程学习完成') || doc.body.innerText.includes('课程学习完成')) {
                    log('课程学完返回列表');
                    history.back();
                    state.lastActionTime = now;
                }
            } catch(e) {}
        });
    }
    // 5. 自动答题：所有题答完再提交
    async function answerQuiz() {
        getAllDocs().forEach(async doc => {
            try {
                const qs = doc.querySelectorAll('[class*=question-item], [class*=quiz-item]');
                if (!qs.length) return;
                log(`检测到${qs.length}道题，开始作答`);
                for (let q of qs) {
                    const opts = q.querySelectorAll('label, .el-radio, .el-checkbox-item');
                    const unsel = [...opts].filter(o => !o.classList.contains('is-checked'));
                    if (unsel.length) {
                        unsel[Math.floor(Math.random()*unsel.length)].click();
                        await new Promise(r=>setTimeout(r,300));
                    }
                }
                await new Promise(r=>setTimeout(r,1500));
                // 必须全部答完才提交
                const allDone = [...qs].every(q => q.querySelectorAll('.is-checked').length > 0);
                if (allDone) {
                    const submit = [...doc.querySelectorAll('button')].find(b => b.innerText?.includes('提交') && b.offsetParent);
                    if (submit) { submit.click(); log('全部答完提交'); }
                }
            } catch(e) {}
        });
    }
    // 主循环
    async function loop() {
        closePopups();
        playVideo();
        pickNextCourse();
        nextSection();
        // 检测到题目就答题
        const hasQuiz = getAllDocs().some(d => d.body.innerText.includes('单选题') || d.querySelectorAll('[class*=question-item]').length > 0);
        if (hasQuiz) await answerQuiz();
        setTimeout(loop, CONFIG.checkInterval);
    }
    log('v3.5启动：递归遍历iframe，自动循环学完所有必修');
    setTimeout(loop, 3000);
})();