// ==UserScript==
// @name         UOOC 学习助手_szu_v2
// @namespace    https://github.com/xiaochai-123
// @version      1.4.1
// @description  自动静音、二倍速、失焦不断播、自动连播、自动答题(视频中非测验)。递归可开关，修复直接跳过首测验视频小节的bug。
// @license      GPL
// @match        *://www.uooc.net.cn/*
// @match        *://uooc.net.cn/*
// @match        *://*.uooc.net.cn/*
// @match        *://uooc.online/*
// @match        *://*.uooc.online/*
// @grant        none
// @downloadURL none
// ==/UserScript==

(function () {
    "use strict";

    // 自动播放和倍速静音
    function keepPlaying() {
        const video = document.getElementById("player_html5_api");
        if (video) {
            video.muted = true;
            video.playbackRate = 2;
            if (video.paused && !video.ended) video.play();
        }
        const playBtn = document.querySelector(".vjs-big-play-button");
        if (playBtn) playBtn.click();
    }
    setInterval(keepPlaying, 500);

    // 强力弹窗和遮罩清理函数，智能判断保留小测验证弹窗
    setInterval(() => {
        let hasSmartVerification = false;
        document.querySelectorAll('.layui-layer').forEach(layer => {
            const layerText = layer.innerText || '';
            if (layerText.includes('验证') || layerText.includes('智能') || layerText.includes('提交') ||
                layer.querySelector('.layui-layer-btn')) {
                hasSmartVerification = true;
            }
        });

        if (!hasSmartVerification) {
            document.querySelectorAll('.layui-layer-shade').forEach(e => e.remove());
            document.querySelectorAll('.layui-layer.layui-layer-page').forEach(e => {
                const layerText = e.innerText || '';
                if (!layerText.includes('验证') && !layerText.includes('智能') && !layerText.includes('提交')) {
                    e.remove();
                }
            });
            document.querySelectorAll('.vjs-mask').forEach(e => e.remove());
            let quizDom = document.querySelector(".smallTest-view");
            if (quizDom && quizDom.offsetTop > 600) {
                quizDom.style.display = "none";
            }
        }
    }, 800);

    // 自动答题
    let lastQuizQuestion = null;
    function autoAnswerQuiz() {
        let quizLayer = document.querySelector("#quizLayer");
        if (quizLayer && quizLayer.style.display !== "none") {
            try {
                let videoDiv = document.querySelector("div[uooc-video]");
                if (!videoDiv) return;
                let source = videoDiv.getAttribute("source");
                if (!source) return;
                let quizList = JSON.parse(source).quiz || [];
                let quizQuestionElem = document.querySelector(".smallTest-view .ti-q-c");
                if (!quizQuestionElem) return;
                let quizQuestion = quizQuestionElem.innerHTML.trim();

                if (lastQuizQuestion === quizQuestion && quizLayer.classList.contains("answered")) {
                    return;
                }

                let quizIndex = quizList.findIndex(q => q.question === quizQuestion);
                if (quizIndex === -1) return;
                let quizAnswer = eval(quizList[quizIndex].answer);
                let quizOptions = quizLayer.querySelector("div.ti-alist");
                if (quizOptions) {
                    for (let ans of quizAnswer) {
                        let labelIndex = ans.charCodeAt() - "A".charCodeAt();
                        let opt = quizOptions.children[labelIndex];
                        if (opt) opt.click();
                    }
                    let btn = quizLayer.querySelector("button");
                    if (btn) btn.click();
                    quizLayer.classList.add("answered");
                    lastQuizQuestion = quizQuestion;
                    console.log("自动答题已完成:", quizQuestion, quizAnswer.toString());
                }
            } catch (error) {
                console.log("自动答题发生错误:", error);
            }
        } else {
            lastQuizQuestion = null;
            let answeredLayer = document.querySelector("#quizLayer.answered");
            if (answeredLayer) answeredLayer.classList.remove("answered");
        }
    }
    setInterval(autoAnswerQuiz, 500);

    // ======= 递归连播开关和核心 =======
    let autoRecursiveFlag = false;
    let controlBtn = document.createElement("button");
    controlBtn.innerText = "递归上课：关闭";
    controlBtn.style.position = "fixed";
    controlBtn.style.top = "140px";
    controlBtn.style.right = "30px";
    controlBtn.style.zIndex = "9999";
    controlBtn.style.background = "#00796b";
    controlBtn.style.color = "#fff";
    controlBtn.style.border = "none";
    controlBtn.style.padding = "11px 22px";
    controlBtn.style.borderRadius = "8px";
    controlBtn.style.cursor = "pointer";
    controlBtn.style.boxShadow = "0 2px 12px rgba(0,0,0,0.18)";
    controlBtn.style.userSelect = "none";
    controlBtn.onclick = function () {
        autoRecursiveFlag = !autoRecursiveFlag;
        controlBtn.innerText = "递归上课：" + (autoRecursiveFlag ? "开启" : "关闭");
        if (autoRecursiveFlag) {
            startUltimateCourseRush();
        }
    };
    document.body.appendChild(controlBtn);

    function sleep(ms) { return new Promise(resolve => setTimeout(resolve, ms)); }
    function clearShader() {
        let hasSmartVerification = false;
        document.querySelectorAll('.layui-layer').forEach(layer => {
            const layerText = layer.innerText || '';
            if (layerText.includes('验证') || layerText.includes('智能') || layerText.includes('提交') ||
                layer.querySelector('.layui-layer-btn')) {
                hasSmartVerification = true;
            }
        });

        if (!hasSmartVerification) {
            document.querySelectorAll("div.layui-layer-shade").forEach(shader => shader.remove());
            document.querySelectorAll('.vjs-mask').forEach(e => e.remove());
        }
    }
    function findCurrentVideoNode() {
        let current = document.querySelector('.basic.active');
        if (current) return current;
        current = document.querySelector('.video-list li.current, .chapter-list li.current, .menu li.current, li.active, li.selected');
        if (current) return current;
        return null;
    }
    function findNextVideoInSameChapter(currentNode) {
        if (!currentNode) return null;
        let chapterContainer = currentNode.closest('ul, .chapter-list, .video-list');
        if (!chapterContainer) return null;
        let allVideoNodes = Array.from(chapterContainer.querySelectorAll('li, .basic'));
        let currentIndex = allVideoNodes.indexOf(currentNode);
        if (currentIndex === -1 || currentIndex >= allVideoNodes.length - 1) {
            return null;
        }
        for (let i = currentIndex + 1; i < allVideoNodes.length; i++) {
            let nextNode = allVideoNodes[i];
            if (nextNode.querySelector('.icon-video, span.icon-video') || nextNode.classList.contains('taskpoint') && !nextNode.innerText.includes("测验")) {
                return nextNode;
            }
        }
        return null;
    }
    function playNextVideoInChapter() {
        let current = findCurrentVideoNode();
        let next = findNextVideoInSameChapter(current);
        if (next) {
            let clickTarget = next.querySelector('a') || next;
            clickTarget.click();
            setTimeout(() => {
                const video = document.getElementById('player_html5_api');
                if (video) {
                    video.muted = true;
                    video.playbackRate = 2;
                    video.play();
                }
            }, 1000);
            return true;
        }
        return false;
    }
    function waitForVideoCompletion() {
        return new Promise(resolve => {
            const video = document.getElementById('player_html5_api');
            if (!video) {
                resolve();
                return;
            }
            video._recursiveResolve = resolve;
            video.onended = function() {
                setTimeout(() => {
                    if (video._recursiveResolve) {
                        video._recursiveResolve();
                    }
                }, 1500);
            };
            video.muted = true;
            video.playbackRate = 2;
            const playBtn = document.querySelector(".vjs-big-play-button");
            if (playBtn) playBtn.click();
            setTimeout(() => {
                if (video.ended && video._recursiveResolve) {
                    video._recursiveResolve();
                }
            }, 500);
        });
    }
    function findCurrentChapter() {
        const currentVideoNode = findCurrentVideoNode();
        if (!currentVideoNode) return null;
        let node = currentVideoNode;
        while (node && node.parentElement) {
            if (node.parentElement.classList.contains('rank-1') || node.classList.contains('rank-1-item')) {
                return node;
            }
            node = node.parentElement;
        }
        return null;
    }
    async function searchUncompleteFromCurrentChapter() {
        const catalogRoot = document.querySelector("ul.rank-1");
        if (!catalogRoot) return;
        const chapters = Array.from(catalogRoot.children);
        const currentChapter = findCurrentChapter();
        let startIndex = 0;
        if (currentChapter) {
            startIndex = chapters.indexOf(currentChapter);
            if (startIndex === -1) startIndex = 0;
        }
        for (let i = startIndex; i < chapters.length; i++) {
            await checkActive(chapters[i]);
        }
    }
    async function checkActive(catalog) {
        let children = catalog.children;
        let elem = catalog?.firstElementChild;
        // 展开章节(移除uncomplete和测试过滤)
        if (elem) {
            let iElement = elem.getElementsByTagName("i")[0];
            if (iElement && iElement.classList.contains("icon-xiangxia")) {
                elem.click();
            }
            await sleep(500);
        }
        
        for (let i = 1; i < children.length; i++) {
            if (children[i].tagName === "DIV") {
                const resourceListDiv = children[i];
                const resources = Array.from(resourceListDiv.querySelectorAll(':scope > .basic'));
                for (let r of resources) {
                    if (r.classList.contains('complete')) continue;
                    let nameSpan = r.querySelector('.tag-source-name');
                    let nameText = nameSpan ? (nameSpan.innerText || '') : '';
                    if (nameSpan && nameSpan.classList.contains('taskpoint') && nameText.includes('测验')) {
                        continue;
                    }
                    if (r.querySelector('.icon-video') || /视频/.test(nameText)) {
                        r.click();
                        clearShader();
                        await waitForVideoCompletion();
                        while (playNextVideoInChapter()) {
                            await waitForVideoCompletion();
                        }
                        return;
                    }
                }
            } else if (children[i].tagName === "UL") {
                await searchUncomplete(children[i]);
            }
        }
    }
    async function searchUncomplete(query) {
        let catalog = query.children;
        for (let i = 0; i < catalog.length; i++) {
            await checkActive(catalog[i]);
        }
    }
    async function startUltimateCourseRush() {
        if (!autoRecursiveFlag) return;
        await searchUncompleteFromCurrentChapter();
    }

    $(document).ready(function () {
        setTimeout(() => { if (autoRecursiveFlag) startUltimateCourseRush(); }, 1000);
        setInterval(async function () {
            if (autoRecursiveFlag) {
                const video = document.getElementById('player_html5_api');
                if ((!video || video.ended) && !document.querySelector(".basic.active")) {
                    await startUltimateCourseRush();
                }
            }
        }, 800);
        setInterval(bindVideoEnded, 800);
    });

    function bindVideoEnded() {
        const video = document.getElementById('player_html5_api');
        if (video && !video._autoNextBound) {
            video._autoNextBound = true;
            video.onended = function () {
                if (autoRecursiveFlag) {
                    if (!playNextVideoInChapter()) {
                        setTimeout(() => {startUltimateCourseRush();}, 1500);
                    }
                }
            };
        }
    }
})();