// ==UserScript==
// @name         埋堆堆视频元数据批量收集（自动翻页+CSV导出）
// @namespace    https://example.com/
// @version      3.0
// @description  批量收集埋堆堆视频标题、封面、简介和播放链接，支持自动翻页并导出为CSV（不下载视频）
// @match        https://maiduoduo.example.com/*
// @grant        GM_setClipboard
// @grant        GM_registerMenuCommand
// @grant        GM_download
// ==/UserScript==

(function() {
    'use strict';

    let collectedData = [];
    let isCollecting = false;

    // 提取当前页面的视频信息
    function collectVideoDataFromPage() {
        const videos = [];
        document.querySelectorAll('.video-card').forEach(card => {
            const title = card.querySelector('.title')?.innerText.trim().replace(/,/g, "，") || '无标题';
            const cover = card.querySelector('img')?.src || '';
            const link = card.querySelector('a')?.href || '';
            const desc = card.querySelector('.description')?.innerText.trim().replace(/,/g, "，") || '';
            videos.push({ title, cover, link, desc });
        });
        return videos;
    }

    // 检查是否有下一页按钮
    function getNextPageButton() {
        return document.querySelector('.pagination-next:not(.disabled)');
    }

    // 自动翻页收集
    async function autoCollect() {
        if (isCollecting) return;
        isCollecting = true;
        collectedData = [];

        while (true) {
            console.log("正在收集当前页数据...");
            collectedData.push(...collectVideoDataFromPage());

            const nextBtn = getNextPageButton();
            if (!nextBtn) {
                console.log("没有更多页面了");
                break;
            }

            console.log("跳转到下一页...");
            nextBtn.click();
            await waitForPageLoad();
        }

        exportDataAsCSV();
        isCollecting = false;
    }

    // 等待页面加载完成
    function waitForPageLoad(timeout = 5000) {
        return new Promise(resolve => {
            const start = Date.now();
            const check = () => {
                if (document.readyState === 'complete' || Date.now() - start > timeout) {
                    setTimeout(resolve, 500); // 再等半秒确保内容渲染
                } else {
                    requestAnimationFrame(check);
                }
            };
            check();
        });
    }

    // 导出为 CSV
    function exportDataAsCSV() {
        if (collectedData.length === 0) {
            alert("没有收集到任何数据");
            return;
        }

        const header = ["标题", "封面URL", "播放链接", "简介"];
        const rows = collectedData.map(v => [
            `"${v.title}"`,
            `"${v.cover}"`,
            `"${v.link}"`,
            `"${v.desc}"`
        ]);

        const csvContent = [header.join(","), ...rows.map(r => r.join(","))].join("\n");

        // 复制到剪贴板
        GM_setClipboard(csvContent);
        console.log("CSV 数据：\n", csvContent);

        // 下载 CSV 文件
        GM_download({
            url: "data:text/csv;charset=utf-8," + encodeURIComponent(csvContent),
            name: "maiduoduo_videos.csv",
            saveAs: true
        });

        alert(`已收集 ${collectedData.length} 个视频信息，并导出为 CSV 文件`);
    }

    // 注册菜单命令
    GM_registerMenuCommand("批量收集视频元数据（自动翻页+CSV导出）", autoCollect);

})();