// ==UserScript==
// @name         智云课堂在线播放 
// @namespace    http://tampermonkey.net/
// @version      5.0
// @description  支持在线流式预览、双模式批量下载 & Motrix一键直连
// @author       LocalHostCompany
// @match        https://classroom.zju.edu.cn/coursedetail*
// @require      https://cdn.jsdelivr.net/npm/hls.js@1.5.0/dist/hls.min.js
// @require      https://cdn.jsdelivr.net/npm/dplayer@1.27.1/dist/DPlayer.min.js
// @grant        GM_xmlhttpRequest
// @connect      127.0.0.1
// @connect      localhost
// @license      MIT
// @downloadURL https://update.greasyfork.icu/scripts/567930/%E6%99%BA%E4%BA%91%E8%AF%BE%E5%A0%82%E5%9C%A8%E7%BA%BF%E6%92%AD%E6%94%BE.user.js
// @updateURL https://update.greasyfork.icu/scripts/567930/%E6%99%BA%E4%BA%91%E8%AF%BE%E5%A0%82%E5%9C%A8%E7%BA%BF%E6%92%AD%E6%94%BE.meta.js
// ==/UserScript==

(function () {
    'use strict';

    console.log("智云课堂在线播放脚本已启动（全能终极版 v5.0）");

    // 动态注入 DPlayer CSS
    (function injectDPlayerCSS() {
        if (document.querySelector('link[data-dplayer-css]')) return;
        const link = document.createElement('link');
        link.rel = 'stylesheet';
        link.href = 'https://cdn.jsdelivr.net/npm/dplayer@1.27.1/dist/DPlayer.min.css';
        link.setAttribute('data-dplayer-css', '1');
        document.head.appendChild(link);
    })();

    function getQueryVariable(variable) {
        const query = window.location.search.substring(1);
        const vars = query.split("&");
        for (let i = 0; i < vars.length; i++) {
            const pair = vars[i].split("=");
            if (pair[0] === variable) return decodeURIComponent(pair[1]);
            if (decodeURIComponent(pair[0]) === variable) return decodeURIComponent(pair[1]);
        }
        return (false);
    }

    const course_id = getQueryVariable("course_id");
    if (!course_id) return;

    const corsProxy = '';
    const VIDEO_TYPES = ['course_live', 'video', 'ilive', 'olive', 'large_class'];

    function extractVideoUrl(content) {
        try {
            const c = typeof content === 'string' ? JSON.parse(content) : content;
            if (c && c.playback && c.playback.url) return c.playback.url;
            if (c && c.url) return c.url;
        } catch (e) { }
        return null;
    }

    function getCookie(name) {
        const m = document.cookie.match(new RegExp('(?:^|;\\s*)' + name + '=([^;]*)'));
        return m ? decodeURIComponent(m[1]) : '';
    }

    function getAuthToken() {
        try {
            for (const key of ['token', 'access_token', 'Token', 'Authorization', 'auth_token', 'user_token']) {
                const val = localStorage.getItem(key);
                if (val) return val.replace(/^Bearer\s+/i, '');
            }
            const ct = getCookie('token') || getCookie('access_token');
            if (ct) return ct;
        } catch (e) { }
        return '';
    }

    function getStudentAccount() {
        try {
            const app = document.querySelector('#app');
            if (app && app.__vue__ && app.__vue__.$store) {
                const userinfo = app.__vue__.$store.state.userinfo;
                if (userinfo && userinfo.account) return userinfo.account;
            }
            for (const key of ['userinfo', 'user_info', 'user']) {
                const raw = localStorage.getItem(key);
                if (raw) {
                    try {
                        const u = JSON.parse(raw);
                        if (u.account) return u.account;
                        if (u.username) return u.username;
                    } catch (e) { }
                }
            }
            const ca = getCookie('account') || getCookie('username');
            if (ca) return ca;
        } catch (e) { }
        return '';
    }

    function authFetchOpts(extraHeaders = {}) {
        const headers = { ...extraHeaders };
        const token = getAuthToken();
        if (token) headers['Authorization'] = `Bearer ${token}`;
        return { credentials: 'include', headers };
    }

    function flattenSubList(list) {
        if (!Array.isArray(list)) return [];
        const result = [];
        for (const item of list) {
            if (item.type === 'chapter' && Array.isArray(item.child)) {
                result.push(...flattenSubList(item.child));
            } else {
                result.push(item);
            }
        }
        return result;
    }

    function flattenCourseLiveObj(obj) {
        const result = [];
        if (!obj || typeof obj !== 'object') return result;
        for (const year of Object.values(obj)) {
            if (typeof year !== 'object') continue;
            for (const month of Object.values(year)) {
                if (typeof month !== 'object') continue;
                for (const week of Object.values(month)) {
                    if (Array.isArray(week)) result.push(...week);
                }
            }
        }
        return result;
    }

    async function fetchViaV3() {
        const student = getStudentAccount();
        let apiUrl = `https://classroom.zju.edu.cn/courseapi/v3/multi-search/get-course-detail?course_id=${course_id}`;
        if (student) apiUrl += `&student=${encodeURIComponent(student)}`;
        const resp = await fetch(apiUrl, authFetchOpts());
        const data = await resp.json();
        if (data.code !== 0 || !data.data) throw new Error(`v3 API 返回异常: code=${data.code}`);

        const courseData = data.data;
        let subList;
        if (courseData.auto_chapter) {
            if (Array.isArray(courseData.origin_sub_list)) subList = flattenSubList(courseData.origin_sub_list);
            else if (courseData.sub_list && typeof courseData.sub_list === 'object' && !Array.isArray(courseData.sub_list)) subList = flattenCourseLiveObj(courseData.sub_list);
            else subList = [];
        } else if (Array.isArray(courseData.sub_list)) {
            subList = flattenSubList(courseData.sub_list);
        } else {
            throw new Error('v3 API 无 sub_list');
        }

        const videoSubs = subList.filter(s => VIDEO_TYPES.includes(s.type));
        const videos = [];

        for (let i = 0; i < videoSubs.length; i++) {
            const sub = videoSubs[i];
            let title = sub.sub_title || sub.title || `第${i + 1}节`;
            let videoUrl = null;
            let available = true;

            const st = Number(sub.sub_status);
            if (st === 5 || st === 3) {
                available = false;
            } else {
                if (sub.content) videoUrl = extractVideoUrl(sub.content);
                if (!videoUrl && sub.id) {
                    try {
                        const detailUrl = `https://classroom.zju.edu.cn/courseapi/v3/multi-search/get-sub-detail?sub_id=${sub.id}`;
                        const detailResp = await fetch(detailUrl, authFetchOpts());
                        const detailData = await detailResp.json();
                        if (detailData.code === 0 && detailData.data) videoUrl = extractVideoUrl(detailData.data.content);
                    } catch (e) { }
                }
                if (!videoUrl) available = false;
            }

            if (!available || !videoUrl) title += "（暂无回放）";
            videos.push({ title, videoUrl, available, originalIndex: i });
        }
        return videos;
    }

    async function fetchViaV2() {
        const apiUrl = `https://classroom.zju.edu.cn/courseapi/v2/course/catalogue?course_id=${course_id}`;
        const resp = await fetch(apiUrl, authFetchOpts({ "Content-Type": "application/json" }));
        const data = await resp.json();
        if (!(data.success && data.result && data.result.data)) throw new Error('v2 API 返回数据异常');

        const items = data.result.data;
        const videos = [];
        for (let i = 0; i < items.length; i++) {
            const item = items[i];
            let title = item.title;
            let videoUrl = null;
            let available = true;

            try {
                videoUrl = extractVideoUrl(item.content);
                if (!videoUrl) available = false;
            } catch (e) { available = false; }

            if (!available || !videoUrl) title += "（暂无回放）";
            videos.push({ title, videoUrl, available, originalIndex: i });
        }
        return videos;
    }

    (async function loadVideoList() {
        await new Promise(r => {
            if (document.readyState === 'complete') return r();
            window.addEventListener('load', r, { once: true });
        });
        await new Promise(r => setTimeout(r, 2000));

        let videos = null;
        try { videos = await fetchViaV3(); } catch (e) { }
        if (!videos || videos.length === 0) {
            try { videos = await fetchViaV2(); } catch (e) { }
        }

        if (!videos || videos.length === 0) {
            console.error("无法获取视频列表，请检查是否已登录。");
            return;
        }

        addDownloadUI(videos);
    })();

    function getCourseInfo() {
        let courseName = '未知课程';
        let teacherName = '未知教师';
        try {
            const parts = (document.title || '').split('_');
            if (parts.length >= 2) {
                if (parts[0].trim()) courseName = parts[0].trim();
                if (parts[1].trim()) teacherName = parts[1].trim();
            }
        } catch (e) { }
        return { courseName, teacherName };
    }

    /** 强制下划线命名法，同时将原有的横线也替换掉 */
    function sanitizeFilename(name) {
        return name.replace(/[\/\\:*?"<>|\-]/g, '_');
    }

    function addDownloadUI(videos) {
        const container = document.createElement("div");
        container.style.cssText = "position:fixed;bottom:10px;right:10px;background:rgba(255,255,255,0.95);padding:15px;border:1px solid #ccc;z-index:9999;max-height:80%;overflow-y:auto;font-size:14px;box-shadow:0 0 10px rgba(0,0,0,0.1);border-radius:5px;width:320px;display:flex;flex-direction:column;transition:all 0.3s ease;";

        const header = document.createElement("div");
        header.style.cssText = "display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;";

        const title = document.createElement("div");
        title.style.fontWeight = "bold";
        title.innerText = "批量下载视频";
        header.appendChild(title);

        const minimizeButton = document.createElement("button");
        minimizeButton.innerText = "—";
        minimizeButton.style.cssText = "border:none;background:none;cursor:pointer;font-size:16px;padding:0;margin-left:10px;";

        minimizeButton.addEventListener("click", () => {
            const isMin = container.classList.toggle("minimized");
            minimizeButton.innerText = isMin ? "+" : "—";
            const displayStyle = isMin ? "none" : "block";

            selectAllContainer.style.display = isMin ? "none" : "flex";
            downloadButton.style.display = displayStyle;
            exportButton.style.display = displayStyle;
            motrixRpcButton.style.display = displayStyle;
            softwareHint.style.display = displayStyle;
            overallProgressContainer.style.display = window._isDownloading && !isMin ? "block" : "none";
            status.style.display = displayStyle;
            list.style.display = displayStyle;
            stopButton.style.display = window._isDownloading && !isMin ? "block" : "none";
        });

        header.appendChild(minimizeButton);
        container.appendChild(header);

        const selectAllContainer = document.createElement("div");
        selectAllContainer.style.cssText = "display:flex;align-items:center;margin-bottom:10px;";
        const selectAllCheckbox = document.createElement("input");
        selectAllCheckbox.type = "checkbox";
        selectAllCheckbox.id = "selectAllCheckbox";
        const selectAllLabel = document.createElement("label");
        selectAllLabel.htmlFor = "selectAllCheckbox";
        selectAllLabel.innerText = " 全选";
        selectAllContainer.appendChild(selectAllCheckbox);
        selectAllContainer.appendChild(selectAllLabel);
        container.appendChild(selectAllContainer);

        const downloadButton = document.createElement("button");
        downloadButton.innerText = "下载选中视频";
        downloadButton.style.cssText = "display:block;margin-top:10px;width:100%;padding:8px;background-color:#4CAF50;color:white;border:none;border-radius:3px;cursor:pointer;font-size:14px;";
        container.appendChild(downloadButton);

        const exportButton = document.createElement("button");
        exportButton.innerText = "导出批量链接 (推荐)";
        exportButton.style.cssText = "display:block;margin-top:6px;width:100%;padding:8px;background-color:#1976D2;color:white;border:none;border-radius:3px;cursor:pointer;font-size:14px;";
        container.appendChild(exportButton);

        const motrixRpcButton = document.createElement("button");
        motrixRpcButton.innerText = "🚀 一键发送至 Motrix (全自动)";
        motrixRpcButton.style.cssText = "display:block;margin-top:6px;width:100%;padding:8px;background-color:#9C27B0;color:white;border:none;border-radius:3px;cursor:pointer;font-size:14px;";
        container.appendChild(motrixRpcButton);

        const softwareHint = document.createElement("div");
        softwareHint.innerText = "💡 批量全自动重命名请使用 IDM 或 Motrix 导入";
        softwareHint.style.cssText = "font-size:11px;color:#666;text-align:center;margin-top:4px;margin-bottom:6px;";
        container.appendChild(softwareHint);

        const stopButton = document.createElement("button");
        stopButton.innerText = "停止下载";
        stopButton.style.cssText = "display:none;margin-top:6px;width:100%;padding:8px;background-color:#e53935;color:white;border:none;border-radius:3px;cursor:pointer;font-size:14px;";
        container.appendChild(stopButton);

        const status = document.createElement("div");
        status.style.cssText = "margin-top:10px;font-size:12px;color:#555;";
        container.appendChild(status);

        const overallProgressContainer = document.createElement("div");
        overallProgressContainer.style.cssText = "width:100%;background-color:#f3f3f3;border-radius:5px;margin-top:10px;display:none;";
        const overallProgressLabel = document.createElement("div");
        overallProgressLabel.style.cssText = "text-align:center;font-size:11px;color:#555;padding:2px 0;";
        const overallProgressBar = document.createElement("div");
        overallProgressBar.style.cssText = "width:0%;height:20px;background-color:#4CAF50;border-radius:5px;";
        overallProgressContainer.appendChild(overallProgressLabel);
        overallProgressContainer.appendChild(overallProgressBar);
        container.appendChild(overallProgressContainer);

        const list = document.createElement("ul");
        list.style.cssText = "list-style:none;padding:0;margin-top:10px;";
        container.appendChild(list);

        videos.forEach((video, index) => {
            const listItem = document.createElement("li");
            listItem.style.cssText = "margin-top:10px;display:block;border-bottom:1px solid #ddd;padding-bottom:10px;";

            const headerDiv = document.createElement("div");
            headerDiv.style.cssText = "display:flex;align-items:center;";

            const checkbox = document.createElement("input");
            checkbox.type = "checkbox";
            checkbox.value = video.originalIndex;
            checkbox.className = "videoCheckbox";
            checkbox.style.marginRight = "10px";
            if (!video.available) checkbox.disabled = true;

            const label = document.createElement("label");
            label.style.flex = "1";
            label.style.cursor = "pointer";
            label.innerText = video.title;

            headerDiv.appendChild(checkbox);
            headerDiv.appendChild(label);

            if (video.available && video.videoUrl) {
                const previewBtn = document.createElement("button");
                previewBtn.innerText = "▶️ 预览";
                previewBtn.style.cssText = "margin-left:8px;padding:2px 7px;font-size:12px;border:1px solid #aaa;border-radius:3px;background:#f5f5f5;cursor:pointer;white-space:nowrap;";
                previewBtn.addEventListener("click", () => openPreview(video.videoUrl, video.title));
                headerDiv.appendChild(previewBtn);
            }

            listItem.appendChild(headerDiv);

            const progressContainer = document.createElement("div");
            progressContainer.style.cssText = "width:100%;background-color:#f3f3f3;border-radius:5px;margin-top:5px;display:none;";
            const progressBar = document.createElement("div");
            progressBar.style.cssText = "width:0%;height:10px;background-color:#4CAF50;border-radius:5px;";
            progressContainer.appendChild(progressBar);

            const infoDiv = document.createElement("div");
            infoDiv.style.cssText = "margin-top:5px;font-size:12px;color:#555;display:none;";
            infoDiv.innerText = "速度: 0 KB/s | 预计剩余时间: 0 s";

            listItem.appendChild(progressContainer);
            listItem.appendChild(infoDiv);
            list.appendChild(listItem);
        });

        document.body.appendChild(container);

        function openPreview(url, title) {
            const overlay = document.createElement('div');
            overlay.style.cssText = 'position:fixed;inset:0;background:rgba(0,0,0,0.82);display:flex;align-items:center;justify-content:center;z-index:999999;';
            const modal = document.createElement('div');
            modal.style.cssText = 'position:relative;width:800px;max-width:95vw;height:450px;background:#000;border-radius:8px;overflow:hidden;';
            const closeBtn = document.createElement('button');
            closeBtn.innerText = '❌ 关闭';
            closeBtn.style.cssText = 'position:absolute;top:8px;right:8px;z-index:10;background:rgba(0,0,0,0.65);color:#fff;border:none;border-radius:4px;padding:5px 12px;font-size:13px;cursor:pointer;';
            const playerContainer = document.createElement('div');
            playerContainer.style.width = '100%';
            playerContainer.style.height = '100%';

            modal.appendChild(closeBtn);
            modal.appendChild(playerContainer);
            overlay.appendChild(modal);
            document.body.appendChild(overlay);

            const dp = new DPlayer({ container: playerContainer, autoplay: true, video: { url, type: 'auto' }});
            function closeModal() { dp.destroy(); overlay.remove(); }
            closeBtn.addEventListener('click', closeModal);
            overlay.addEventListener('click', (e) => { if (e.target === overlay) closeModal(); });
        }

        selectAllCheckbox.addEventListener("change", function () {
            container.querySelectorAll(".videoCheckbox").forEach(cb => {
                if (!cb.disabled) cb.checked = this.checked;
            });
        });

        function restoreButtons() {
            window._isDownloading = false;
            downloadButton.disabled = false; downloadButton.innerText = "下载选中视频"; downloadButton.style.backgroundColor = "#4CAF50";
            exportButton.disabled = false; exportButton.innerText = "导出批量链接 (推荐)"; exportButton.style.backgroundColor = "#1976D2";
            motrixRpcButton.disabled = false; motrixRpcButton.innerText = "🚀 一键发送至 Motrix (全自动)"; motrixRpcButton.style.backgroundColor = "#9C27B0";
            stopButton.style.display = "none";
        }

        function updateOverallProgress(done, total, prefix="总进度") {
            overallProgressBar.style.width = ((done / total) * 100).toFixed(2) + '%';
            overallProgressLabel.innerText = `${prefix}：${done} / ${total}`;
        }

        // ======================= 模式一：浏览器原生下载 =======================
        downloadButton.addEventListener("click", function () {
            status.innerText = "开始下载...";
            status.style.color = "#555";
            const checkboxes = container.querySelectorAll(".videoCheckbox");
            const selectedVideos = [];
            checkboxes.forEach(cb => { if (cb.checked) selectedVideos.push({ video: videos[parseInt(cb.value)], index: parseInt(cb.value) }); });

            if (selectedVideos.length === 0) { alert("请选择要下载的视频"); return; }

            window._isDownloading = true;
            downloadButton.disabled = true; downloadButton.innerText = "下载中..."; downloadButton.style.backgroundColor = "#888";
            exportButton.disabled = true; exportButton.style.backgroundColor = "#888";
            motrixRpcButton.disabled = true; motrixRpcButton.style.backgroundColor = "#888";
            stopButton.style.display = "block";
            overallProgressContainer.style.display = "block"; overallProgressBar.style.width = "0%";

            let currentDownload = 0;
            let completed = 0;
            const controller = new AbortController();
            stopButton.onclick = () => controller.abort();

            async function downloadNext() {
                if (controller.signal.aborted) return;
                if (currentDownload < selectedVideos.length) {
                    const { video, index } = selectedVideos[currentDownload];
                    const listItem = list.children[index];
                    const progressContainer = listItem.querySelector("div:nth-child(2)");
                    const progressBar = progressContainer.querySelector("div");
                    const infoDiv = listItem.querySelector("div:nth-child(3)");

                    status.innerText = `正在下载 (${currentDownload + 1}/${selectedVideos.length}): ${video.title}`;
                    progressContainer.style.display = "block"; infoDiv.style.display = "block";

                    try {
                        const { courseName, teacherName } = getCourseInfo();
                        const suggestedName = sanitizeFilename(`${courseName}_${teacherName}_${video.title}`) + '.mp4';

                        const response = await fetch(corsProxy + video.videoUrl, { signal: controller.signal });
                        if (!response.ok) throw new Error(`HTTP ${response.status}`);

                        const contentLength = response.headers.get('Content-Length');
                        const totalSize = contentLength ? parseInt(contentLength, 10) : 0;
                        let loadedBytes = 0;

                        const reader = response.body.getReader();
                        const chunks = [];

                        while(true) {
                            const {done, value} = await reader.read();
                            if (done) break;
                            chunks.push(value);
                            loadedBytes += value.byteLength;
                            if (totalSize) progressBar.style.width = ((loadedBytes / totalSize) * 100) + '%';
                        }

                        progressBar.style.width = '100%';
                        const blob = new Blob(chunks);
                        const objectUrl = window.URL.createObjectURL(blob);
                        const a = document.createElement('a');
                        a.href = objectUrl; a.download = suggestedName;
                        document.body.appendChild(a); a.click(); document.body.removeChild(a);
                        window.URL.revokeObjectURL(objectUrl);

                        infoDiv.innerText = '✅ 下载完成'; infoDiv.style.color = '#4CAF50';
                    } catch (err) {
                        if (err.name === 'AbortError') {
                            status.innerText = '已手动取消'; restoreButtons(); return;
                        } else {
                            infoDiv.innerText = `❌ 下载出错: ${err.message}`; infoDiv.style.color = '#d32f2f';
                        }
                    }
                    completed++; updateOverallProgress(completed, selectedVideos.length, "下载进度"); currentDownload++;
                    setTimeout(downloadNext, 1000);
                } else {
                    status.innerText = '所有下载任务已处理！';
                    setTimeout(() => { overallProgressContainer.style.display = 'none'; }, 5000);
                    restoreButtons();
                }
            }
            downloadNext();
        });

        // ======================= 模式二：导出双份配置链接 =======================
        exportButton.addEventListener("click", function () {
            status.innerText = "正在收集链接，请稍候..."; status.style.color = "#555";
            const checkboxes = container.querySelectorAll(".videoCheckbox");
            const selectedVideos = [];
            checkboxes.forEach(cb => { if (cb.checked) selectedVideos.push({ video: videos[parseInt(cb.value)], index: parseInt(cb.value) }); });

            if (selectedVideos.length === 0) { alert("请选择视频"); return; }

            exportButton.disabled = true; exportButton.innerText = "导出中..."; exportButton.style.backgroundColor = "#888";
            downloadButton.disabled = true; downloadButton.style.backgroundColor = "#888";
            motrixRpcButton.disabled = true; motrixRpcButton.style.backgroundColor = "#888";
            overallProgressContainer.style.display = "block"; overallProgressBar.style.width = "0%";

            let currentIndex = 0, completed = 0;
            let idmContent = '', motrixContent = '';
            const { courseName, teacherName } = getCourseInfo();

            function processNext() {
                if (currentIndex < selectedVideos.length) {
                    const { video, index } = selectedVideos[currentIndex];
                    const infoDiv = list.children[index].querySelector("div:nth-child(3)");
                    status.innerText = `处理 (${currentIndex + 1}/${selectedVideos.length}): ${video.title}`;
                    infoDiv.style.display = "block";

                    if (video.videoUrl) {
                        const filename = sanitizeFilename(`${courseName}_${teacherName}_${video.title}`) + '.mp4';
                        idmContent += `<\n${video.videoUrl}\nfile>${filename}\n>\n`;
                        motrixContent += `${video.videoUrl}\n  out=${filename}\n`;
                        infoDiv.innerText = '✅ 链接已收集'; infoDiv.style.color = '#4CAF50';
                    } else {
                        infoDiv.innerText = '⚠️ 暂无视频链接，已跳过'; infoDiv.style.color = '#f0a500';
                    }
                    completed++; updateOverallProgress(completed, selectedVideos.length, "导出进度"); currentIndex++;
                    processNext();
                } else {
                    if (idmContent.trim() !== '') {
                        const idmA = document.createElement('a');
                        idmA.href = window.URL.createObjectURL(new Blob([idmContent], { type: 'text/plain' }));
                        idmA.download = sanitizeFilename(`${courseName}_IDM专用`) + '.ef2';
                        idmA.click();
                        setTimeout(() => {
                            const motA = document.createElement('a');
                            motA.href = window.URL.createObjectURL(new Blob([motrixContent], { type: 'text/plain' }));
                            motA.download = sanitizeFilename(`${courseName}_Motrix专用`) + '.txt';
                            motA.click();
                        }, 500);
                        status.innerText = '✅ 导出成功！请根据软件选择导入文件。'; status.style.color = '#1976D2';
                    } else {
                        status.innerText = '⚠️ 没有可导出的内容。';
                    }
                    setTimeout(() => { overallProgressContainer.style.display = 'none'; }, 5000);
                    restoreButtons();
                }
            }
            processNext();
        });

// ======================= 模式三：特权级 API 发送至 Motrix =======================
        motrixRpcButton.addEventListener("click", async function () {
            const tokenInput = prompt("【Motrix 连接设置】\n如果你的 Motrix 进阶设置中填写了「RPC 授权密钥」，请输入：\n（如果没有设置，请直接留空并点击确定）", localStorage.getItem("zhiyun_motrix_token") || "");
            if (tokenInput === null) return;
            localStorage.setItem("zhiyun_motrix_token", tokenInput.trim());

            status.innerText = "正在发送至 Motrix..."; status.style.color = "#555";
            const checkboxes = container.querySelectorAll(".videoCheckbox");
            const selectedVideos = [];
            checkboxes.forEach(cb => { if (cb.checked) selectedVideos.push({ video: videos[parseInt(cb.value)], index: parseInt(cb.value) }); });

            if (selectedVideos.length === 0) { alert("请选择要发送的视频"); return; }

            motrixRpcButton.disabled = true; motrixRpcButton.innerText = "发送中..."; motrixRpcButton.style.backgroundColor = "#888";
            downloadButton.disabled = true; downloadButton.style.backgroundColor = "#888";
            exportButton.disabled = true; exportButton.style.backgroundColor = "#888";
            overallProgressContainer.style.display = "block"; overallProgressBar.style.width = "0%";

            const { courseName, teacherName } = getCourseInfo();
            let successCount = 0, failCount = 0;

            for (let i = 0; i < selectedVideos.length; i++) {
                const { video, index } = selectedVideos[i];
                const infoDiv = list.children[index].querySelector("div:nth-child(3)");
                infoDiv.style.display = "block";
                status.innerText = `正在发送 (${i + 1}/${selectedVideos.length}): ${video.title}`;

                if (!video.videoUrl) {
                    infoDiv.innerText = '⚠️ 无链接，已跳过'; infoDiv.style.color = '#f0a500'; failCount++;
                    updateOverallProgress(i + 1, selectedVideos.length, "发送进度");
                    continue;
                }

                // 🌟 核心修复点：强制将相对链接转换成完整的绝对链接 (带 http/https)
                const absoluteUrl = new URL(video.videoUrl, window.location.origin).href;

                const filename = sanitizeFilename(`${courseName}_${teacherName}_${video.title}`) + '.mp4';

                const params = [];
                if (tokenInput.trim() !== "") {
                    params.push(`token:${tokenInput.trim()}`);
                }
                // 🌟 这里发送的是补全后的 absoluteUrl
                params.push([absoluteUrl]);
                params.push({
                    "out": filename,
                    "header": ["User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 Chrome/114.0.0.0 Safari/537.36"]
                });

                const payload = {
                    jsonrpc: "2.0", id: "zhiyun", method: "aria2.addUri",
                    params: params
                };

                try {
                    await new Promise((resolve, reject) => {
                        if (typeof GM_xmlhttpRequest === "undefined") {
                            reject(new Error("浏览器不支持特权API"));
                            return;
                        }
                        GM_xmlhttpRequest({
                            method: "POST",
                            url: "http://127.0.0.1:16800/jsonrpc",
                            data: JSON.stringify(payload),
                            headers: {
                                "Content-Type": "application/json",
                                "Accept": "application/json"
                            },
                            onload: function(res) {
                                if (res.status === 200) {
                                    try {
                                        const resData = JSON.parse(res.responseText);
                                        if (resData.result) resolve(resData);
                                        else reject(new Error(resData.error?.message || "未知错误"));
                                    } catch(e) { reject(new Error("无法解析返回数据")); }
                                } else {
                                    let errorMsg = `HTTP ${res.status}`;
                                    try {
                                        const errObj = JSON.parse(res.responseText);
                                        if (errObj.error && errObj.error.message) errorMsg += ` - ${errObj.error.message}`;
                                    } catch(e) {}
                                    reject(new Error(errorMsg));
                                }
                            },
                            onerror: function(err) {
                                reject(new Error("请确保 Motrix 已打开且端口为 16800"));
                            }
                        });
                    });

                    infoDiv.innerText = '✅ 成功推送到 Motrix'; infoDiv.style.color = '#4CAF50';
                    successCount++;
                } catch (error) {
                    console.error(`发送到 Motrix 失败:`, error);
                    infoDiv.innerText = `❌ 失败: ${error.message}`;
                    infoDiv.style.color = '#d32f2f';
                    failCount++;
                }

                updateOverallProgress(i + 1, selectedVideos.length, "发送进度");
                await new Promise(r => setTimeout(r, 100));
            }

            if (successCount > 0) {
                status.innerText = `✅ 完成！成功发送 ${successCount} 个任务到 Motrix，失败 ${failCount} 个。`;
                status.style.color = '#9C27B0';
            } else {
                status.innerText = '❌ 全部发送失败。请查看各个视频下方的红色报错信息。';
                status.style.color = '#d32f2f';
            }

            setTimeout(() => { overallProgressContainer.style.display = 'none'; }, 6000);
            restoreButtons();
        })();
    }
})()