// ==UserScript==
// @name            联大学堂 全自动刷课+答题
// @namespace       http://tampermonkey.net/
// @version         2.0 修复稳定版
// @description     视频页面跳过时间限制
// @match           *://*.jxjypt.cn/*
// @require         https://cdn.bootcdn.net/ajax/libs/jquery/3.7.1.min.js
// @require         https://cdn.jsdelivr.net/npm/tesseract.js@5/dist/tesseract.min.js
// @grant           GM_xmlhttpRequest
// @run-at          document-end
// ==/UserScript==

(function () {
    'use strict';

    let hasVideo = !!document.querySelector('video');
    const hasExam = !!document.querySelector('.m-question');

    // ==============================================
    // 功能1：视频刷课 + OCR答题（新版多选适配版）
    // ==============================================
    function initVideoModule() {
        // 强制解除时长限制
        function unlockLimit() {
            try {
                if (typeof g_watchPercentage !== 'undefined') g_watchPercentage = 0;
                if (typeof g_totalAnwserTime !== 'undefined') g_totalAnwserTime = 0;
                if (typeof g_totalVideoDuration !== 'undefined' && g_totalVideoDuration > 0) {
                    g_totalAnwserTime = Math.floor(g_totalVideoDuration * 0);
                }
                console.log("✅ 时长限制已强制解除");
            } catch (e) {}
        }

        // OCR识别 统一大写 适配多选
        async function recognizeImage(file) {
            const { data } = await Tesseract.recognize(file, 'chi_sim+eng');
            let text = data.text;

            if (text.includes('如')) {
                text += 'AB';
            }

            text = text.replace(/4/g, 'A');
            text = text.replace(/©/g, 'C');
            text = text.replace(/×/g, '');
            text = text.replace(/条/g, '释');
            text = text.replace(/可/g, '释');
            text = text.replace(/了/g, 'B');
            text = text.toUpperCase();
            return text;
        }

        // 悬浮面板
        function createPanel() {
            let panel = document.createElement('div');
            panel.id = 'autoStudyPanel';
            panel.style.cssText = `
position:fixed;top:140px;right:20px;z-index:999999;
background:#fff;padding:12px;border-radius:10px;box-shadow:0 0 10px rgba(0,0,0,0.2);
width:220px;max-height:80vh;overflow-y:auto;box-sizing:border-box;
`;
            panel.innerHTML = `
<div style="font-weight:bold;margin-bottom:8px;">🎯 全自动连刷</div>
<button id="startBtn" style="width:100%;padding:7px;background:#009688;color:white;border:none;border-radius:4px;">开始自动</button>
<button id="stopBtn" style="width:100%;padding:7px;background:#f56c6c;color:white;border:none;border-radius:4px;margin-top:5px;">停止</button>
<button id="getAnswerBtn" style="width:100%;padding:7px;background:#1677ff;color:white;border:none;border-radius:4px;margin-top:5px;">OCR获取答案</button>
<button id="showQBtn" style="width:100%;padding:7px;background:#722ed1;color:white;border:none;border-radius:4px;margin-top:5px;">显示题目</button>
<button id="unlockBtn" style="width:100%;padding:7px;background:#ff4d4f;color:white;border:none;border-radius:4px;margin-top:5px;">重新解锁时长</button>
<div id="videoInfo" style="margin-top:8px;font-size:13px;line-height:1.5;">计时：00:00<br>总长：00:00<br>进度：0%</div>
<div id="status" style="margin-top:6px;font-size:13px;color:#666;">状态：等待启动</div>
<div id="answerStatus" style="margin-top:6px;font-size:12px;color:#1677ff;">OCR状态：未获取</div>
<div style="margin-top:10px;padding-top:8px;border-top:1px solid #eee;">
    <div style="font-size:12px;font-weight:bold;margin-bottom:4px;">📋 题目&答案：</div>
    <div id="questionDisplay" style="font-size:11px;line-height:1.4;white-space:pre-wrap;color:#333;"></div>
</div>
`;
            document.body.appendChild(panel);
        }

        let isRunning = false;
        let timer = 0;
        let total = 0;
        let interval = null;
        let jumped = false;
        let aiAlreadyCalled = false;

        function fmt(s) {
            let m = Math.floor(s / 60);
            let sec = Math.floor(s % 60);
            return `${String(m).padStart(2, '0')}:${String(sec).padStart(2, '0')}`;
        }

        function closePopups() {
            try {
                $("button:contains('确定'),button:contains('关闭'),.close,.layui-layer-close").click();
                $(".layui-layer,.modal,.popup").hide();
            } catch (e) {}
        }

        function loadDurationNow() {
            let checkVideo = setInterval(() => {
                let video = document.querySelector('video');
                if (video && video.duration > 0) {
                    total = video.duration;
                    updateInfo();
                    clearInterval(checkVideo);
                }
            }, 100);
        }

        function updateInfo() {
            let percent = total > 0 ? (timer / total) * 100 : 0;
            $('#videoInfo').html(`计时：${fmt(timer)}<br>总长：${fmt(total)}<br>进度：${percent.toFixed(1)}%`);
        }

        function loop() {
            if (!isRunning || jumped) return;
            closePopups();
            let video = document.querySelector('video');
            if (!video) return;
            if (video.paused) video.play().catch(() => {});
            if (!video.paused && !video.ended && video.readyState >= 4) {
                timer++;
            }
            updateInfo();
        }

        // 下一课跳转
        function goNext() {
            aiAlreadyCalled = false;
            $('#questionDisplay').text('');
            $('#answerStatus').text('OCR状态：未获取');
            let cur = $('dd.z-color.z-class-icon').first();
            if (!cur.length) return;
            let next = cur.next('dd');
            if (next.length) next.click();
            else {
                let nextChap = cur.closest('.course-list-txt').next().find('dd').first();
                if (nextChap.length) nextChap.click();
            }
            setTimeout(() => {
                timer = 0;
                total = 0;
                jumped = false;
                loadDurationNow();
                unlockLimit();
                $('#status').text('状态：下一节加载中');
                setTimeout(showQuestions, 1200);
                setTimeout(() => {
                    if (isRunning && !aiAlreadyCalled) getAnswerOnce();
                }, 2500);
            }, 4000);
        }

        function start() {
            isRunning = true;
            $('#status').text('状态：运行中（单选+多选已适配）');
            clearInterval(interval);
            interval = setInterval(loop, 1000);
            setTimeout(() => {
                if (isRunning && !aiAlreadyCalled) getAnswerOnce();
            }, 1500);
        }

        function stop() {
            isRunning = false;
            clearInterval(interval);
            $('#status').text('状态：已暂停');
            let video = document.querySelector('video');
            if (video) video.pause();
        }

        function getExamQuestions() {
            const result = [];
            document.querySelectorAll('.m-question').forEach(el => {
                const q = {};
                q.title = el.querySelector('.sub-dotitle pre')?.innerText.trim() || '无题目';
                q.options = {};
                el.querySelectorAll('.m-question-option').forEach(opt => {
                    const k = opt.getAttribute('data-value');
                    const v = opt.innerText.trim().replace(/^[A-Z]\./, '').trim();
                    if (k && v && !v.includes('null')) q.options[k] = v;
                });
                result.push(q);
            });
            return result;
        }

        function showQuestions() {
            const qs = getExamQuestions();
            let txt = '';
            if (!qs.length) txt = '未检测到题目';
            else qs.forEach((q, i) => {
                txt += `第${i+1}题：${q.title}\n`;
                Object.entries(q.options).forEach(([k, v]) => txt += `${k}. ${v}\n`);
                txt += `——————————\n`;
            });
            $('#questionDisplay').text(txt);
        }

        // 读取答案图片 + 提取全部ABCD
        async function getImageAnswer() {
            try {
                $('.zkjx').click();
                const img = document.querySelector('.solution img');
                if (!img) {
                    $('#answerStatus').text('OCR：未找到答案图');
                    return null;
                }
                const response = await fetch(img.src);
                const blob = await response.blob();
                const text = await recognizeImage(blob);
                let oldText = $('#questionDisplay').text();
                $('#questionDisplay').text(oldText + `\n✅ 识别答案：${text}\n`);
                const matchAll = text.match(/[A-D]/g);
                if (matchAll && matchAll.length > 0) {
                    return [...new Set(matchAll)];
                }
            } catch (e) {
                $('#answerStatus').text('OCR：识别失败');
            }
            return null;
        }

        // 提交答案
        function realSubmit() {
            setTimeout(() => {
                let submitBtn = document.getElementById('submitSelfBtn');
                if (submitBtn) {
                    $('#status').text('✅ 答案已提交，跳转下一课');
                    submitBtn.click();
                }
                setTimeout(() => { jumped = true; goNext(); }, 1500);
            }, 1200);
        }

        // 核心：多选强制点击修复版
        async function getAnswerOnce() {
            if (aiAlreadyCalled) return;
            aiAlreadyCalled = true;
            $('#answerStatus').text('OCR状态：识别中...');
            const ans = await getImageAnswer();

            if (ans && Array.isArray(ans)) {
                $('#answerStatus').text(`OCR状态：${ans.join("、")}`);
                // 逐个强制触发鼠标事件，百分百勾选
                for (let key of ans) {
                    let opt = document.querySelector(`.m-question-option[data-value="${key}"]`);
                    if (opt) {
                        opt.dispatchEvent(new MouseEvent('mousedown', {bubbles: true}));
                        opt.dispatchEvent(new MouseEvent('mouseup', {bubbles: true}));
                        opt.click();
                        opt.classList.add('active');
                    }
                }
            } else {
                $('#answerStatus').text('OCR：无有效答案');
            }
            realSubmit();
        }

        // 初始化绑定
        $(function () {
            createPanel();
            unlockLimit();
            loadDurationNow();
            setTimeout(showQuestions, 800);
            $('#startBtn').click(start);
            $('#stopBtn').click(stop);
            $('#showQBtn').click(showQuestions);
            $('#getAnswerBtn').click(getAnswerOnce);
            $('#unlockBtn').click(unlockLimit);
        });
    }

    // ==============================================
    // 功能2：试卷全自动答题（完全没动，保留原版）
    // ==============================================
    function initExamModule() {
        window.confirm = () => true;
        window.alert = () => {};
        window.prompt = () => null;

        function createPanel() {
            if (document.getElementById('autoStudyPanel')) return;
            let panel = $('<div id="autoStudyPanel"></div>');
            panel.css({
                position: 'fixed', top: '100px', right: '20px', zIndex: '999999',
                background: '#fff', padding: '12px', borderRadius: '10px', boxShadow: '0 0 12px rgba(0,0,0,0.25)',
                width: '260px', maxHeight: '80vh', overflowY: 'auto', fontSize: '14px'
            });
            panel.html(`
<div style="font-weight:bold;margin-bottom:8px;font-size:15px;">🎯 联大学堂自动答题</div>
<button id="autoAllBtn" style="width:100%;padding:8px;background:#009688;color:white;border:none;border-radius:4px;margin-top:5px;cursor:pointer;">✅ 全自动答完所有题</button>
<button id="showAnswerBtn" style="width:100%;padding:8px;background:#1677ff;color:white;border:none;border-radius:4px;margin-top:5px;cursor:pointer;">📖 显示所有题目答案</button>
<button id="submitBtn" style="width:100%;padding:8px;background:#ff4d4f;color:white;border:none;border-radius:4px;margin-top:5px;cursor:pointer;">📤 一键交卷</button>
<div id="status" style="margin-top:8px;font-size:13px;color:#666;">状态：加载完成，就绪</div>
<div style="margin-top:10px;padding-top:8px;border-top:1px solid #eee;">
    <div style="font-size:12px;font-weight:bold;margin-bottom:4px;">📋 答案列表：</div>
    <div id="answerDisplay" style="font-size:11px;line-height:1.5;white-space:pre-wrap;color:#333;max-height:250px;overflow-y:auto;"></div>
</div>
        `);
            $('body').append(panel);
        }

        function closePopups() {
            try {
                $("button:contains('确定'),button:contains('关闭'),.close,.layui-layer-close,.modal-close").click();
                $(".layui-layer,.modal,.popup").hide();
            } catch (e) {}
        }

        function expandAllAnswers() {
            $('.zkjx').click();
            $('.solution').show();
        }

        function getAllAnswers() {
            expandAllAnswers();
            const result = [];
            $('.m-question').each((i, el) => {
                const q = {};
                q.title = $(el).find('.sub-dotitle pre').text().trim() || $(el).find('.sub-dotitle').text().trim();
                q.answer = $(el).find('.da-list:first .wenzi').text().trim();
                q.element = el;

                if ($(el).find('.sub-answer-double').length > 0) {
                    q.type = "多选题";
                } else if ($(el).find('dd[data-value]').length > 0) {
                    q.type = "单选题";
                } else if ($(el).find('textarea').length > 0) {
                    q.type = "简答题";
                } else {
                    q.type = "其他题型";
                }
                result.push(q);
            });
            return result;
        }

        function showAllAnswers() {
            const list = getAllAnswers();
            let txt = '';
            list.forEach((q, i) => {
                txt += `【第${i+1}题】(${q.type})\n答案：${q.answer || '无'}\n---\n`;
            });
            $('#answerDisplay').text(txt);
            $('#status').text(`状态：已显示 ${list.length} 题完整答案`);
        }

        function autoAnswerOne(questionEl, answer) {
            if (!answer || answer === '') return;
            const $el = $(questionEl);

            let ans = answer.trim();
            if (ans === "对" || ans === "正确") ans = "A";
            if (ans === "错" || ans === "错误") ans = "B";

            for (let c of ans) {
                if (c >= 'A' && c <= 'Z') {
                    const opt = $el.find(`dd[data-value="${c}"]`);
                    if (opt.length) {
                        opt.click().css({ background: '#e6f7ff', border: '1px solid #1890ff' });
                    }
                    const optText = (c === 'A') ? "正确" : "错误";
                    const opt2 = $el.find(`dd[data-value="${optText}"]`);
                    if (opt2.length) {
                        opt2.click().css({ background: '#e6f7ff', border: '1px solid #1890ff' });
                    }
                }
            }

            const textarea = $el.find('textarea.e__textarea, textarea');
            if (textarea.length) {
                textarea.val(answer).trigger('input').trigger('change').css({
                    background: '#e6f7ff', border: '1px solid #1890ff'
                });
            }
        }

        function autoAnswerAll() {
            closePopups();
            const list = getAllAnswers();
            if (list.length === 0) {
                $('#status').text('❌ 未找到题目，请确认页面已加载完成');
                return;
            }

            let count = 0;
            list.forEach((q, i) => {
                setTimeout(() => {
                    autoAnswerOne(q.element, q.answer);
                    count++;
                    $('#status').text(`状态：答题中 ${count}/${list.length} 题`);
                }, i * 300);
            });

            setTimeout(() => {
                $('#status').text(`✅ 全部答题完成！共 ${list.length} 题`);
            }, list.length * 300 + 600);
        }

        function submitPaper() {
            closePopups();
            setTimeout(() => {
                const btn = $('#btn_submit')[0] || $("button:contains('交卷')")[0] || $("a:contains('交卷')")[0];
                if (btn) {
                    btn.click();
                    $('#status').text('✅ 已触发交卷');
                } else {
                    $('#status').text('❌ 未找到交卷按钮');
                }
            }, 1000);
        }

        $(function () {
            createPanel();
            $('#autoAllBtn').click(autoAnswerAll);
            $('#showAnswerBtn').click(showAllAnswers);
            $('#submitBtn').click(submitPaper);
            $('#status').text('✅ 脚本加载成功！支持单选+多选+简答+判断');
        });
    }

    // ==============================================
    // 自动监听视频
    // ==============================================
    function waitForVideo() {
        const check = setInterval(() => {
            const video = document.querySelector('video');
            if (video) {
                clearInterval(check);
                hasVideo = true;
                initVideoModule();
            }
        }, 500);
    }

    // ==============================================
    // 自动加载
    // ==============================================
    window.addEventListener('load', () => {
        if (hasExam) {
            initExamModule();
        } else {
            waitForVideo();
        }
    });
})();