// ==UserScript==
// @name         生态环境云课堂自动学习助手
// @namespace    http://onlinelearning.21tb.com/
// @version      3.2
// @description  全国生态环境执法培训云课堂全自动学习：精准关闭弹窗、自动循环学完所有必修，静音后台运行
// @author       study_bot
// @match        *://onlinelearning.21tb.com/*
// @grant        none
// @run-at       document-idle
// @noframes
// @tag          教育,学习,自动化,网课,云课堂
// ==/UserScript==

(function() {
    'use strict';
    const CONFIG = { checkInterval: 4000, actionCooldown: 12000 };
    const state = { lastActionTime: 0, visitedCourses: new Set(JSON.parse(localStorage.getItem('visitedCourses') || '[]')) };
    function log(msg) { console.log(`[自动学习v3.2] ${new Date().toLocaleTimeString()} | ${msg}`); }

    // 精准关闭所有弹窗（匹配真实页面的Close按钮）
    function closePopups() {
        try {
            // 匹配真实页面的关闭按钮
            document.querySelectorAll('button[aria-label="Close"], .el-dialog__close, .modal-close, .el-icon-close').forEach(btn => {
                try { btn.click(); } catch(e) {}
            });
            // 点遮罩层关闭弹窗
            const modal = document.querySelector('.el-dialog__wrapper');
            if (modal && getComputedStyle(modal).display !== 'none') modal.click();
        } catch(e) {}
    }

    function playVideo() {
        try { document.querySelectorAll('video').forEach(v => { v.muted = true; v.volume = 0; v.playbackRate = 1; if (v.paused) v.play().catch(()=>{}); }); } catch(e) {}
    }

    function goCourseList() {
        const now = Date.now();
        if (now - state.lastActionTime < CONFIG.actionCooldown) return;
        try {
            if (location.pathname.includes('/student/index')) {
                const btn = [...document.querySelectorAll('a, div, span')].find(el => el.innerText?.trim() === '我的课程' && el.offsetParent);
                if (btn) { log('首页进入我的课程'); btn.click(); state.lastActionTime = now; }
            }
        } catch(e) {}
    }

    function pickNextCourse() {
        const now = Date.now();
        if (now - state.lastActionTime < CONFIG.actionCooldown) return;
        try {
            if (!location.href.includes('course_manage_user_pc')) return;
            const cards = [...document.querySelectorAll('[class*=course-card], [class*=item-card], .list-item')];
            for (let c of cards) {
                const t = c.innerText || '';
                if (t.includes('必修') && !t.includes('已完成') && !t.includes('100%') && !state.visitedCourses.has(t.slice(0,20))) {
                    log('点未学必修: ' + t.split('\n')[0]);
                    c.click(); state.visitedCourses.add(t.slice(0,20));
                    localStorage.setItem('visitedCourses', JSON.stringify([...state.visitedCourses]));
                    state.lastActionTime = now; return;
                }
            }
        } catch(e) {}
    }

    function nextSection() {
        const now = Date.now();
        if (now - state.lastActionTime < CONFIG.actionCooldown) return;
        try {
            if (!location.href.includes('courseLearning/play')) return;
            const nextBtn = [...document.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; }
            const unDone = [...document.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.click(); state.lastActionTime = now; return; } p = p.parentElement; }
            }
            if (document.body.innerText.includes('本课程学习完成')) { log('课程学完回列表'); history.back(); state.lastActionTime = now; }
        } catch(e) {}
    }

    async function answerQuiz() {
        try {
            const qs = document.querySelectorAll('[class*=question-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,200)); }
            }
            await new Promise(r=>setTimeout(r,1000));
            const allDone = [...qs].every(q => q.querySelectorAll('.is-checked').length > 0);
            if (allDone) {
                const submit = [...document.querySelectorAll('button')].find(b => b.innerText?.includes('提交'));
                if (submit) { submit.click(); log('全部答完提交'); }
            }
        } catch(e) {}
    }

    async function loop() { closePopups(); playVideo(); goCourseList(); pickNextCourse(); nextSection(); if (document.body.innerText.includes('单选题')) await answerQuiz(); setTimeout(loop, CONFIG.checkInterval); }
    log('v3.2启动：精准关弹窗，自动循环学完必修');
    setTimeout(loop, 2000);
})();