// ==UserScript==
// @name         SubtitleEase: One-Click Video Subtitle Downloader
// @name:zh-CN   字幕助手: 一键视频字幕下载器
// @namespace    http://tampermonkey.net/
// @version      0.3
// @description  Easily download subtitles from various video platforms with one click
// @description:zh-CN 一键从多个视频平台轻松下载字幕
// @author       Your Name
// @license      MIT
// @match        *://*.youtube.com/*
// @match        *://*.viki.com/*
// @match        *://*.viu.com/*
// @match        *://*.kocowa.com/*
// @match        *://*.wetv.vip/*
// @match        *://*.bilibili.com/*
// @match        *://*.facebook.com/*
// @match        *://*.ted.com/*
// @match        *://*.altbalaji.com/*
// @match        *://*.brightcove.com/*
// @match        *://*.dailymotion.com/*
// @match        *://*.dimsum.my/*
// @match        *://*.ondemandchina.com/*
// @match        *://*.erosnow.com/*
// @match        *://*.drive.google.com/*
// @match        *://*.hotstar.com/*
// @match        *://*.iq.com/*
// @match        *://*.iflix.com/*
// @match        *://*.metopera.org/*
// @match        *://*.mgtv.com/*
// @match        *://*.ondemandkorea.com/*
// @match        *://*.tv.naver.com/*
// @match        *://*.tv.nrk.no/*
// @match        *://*.line.me/*
// @match        *://*.tubitv.com/*
// @match        *://*.vk.com/*
// @match        *://*.vlive.tv/*
// @match        *://*.vimeo.com/*
// @match        *://*.voot.com/*
// @match        *://*.weverse.io/*
// @match        *://*.zee5.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=downsub.com
// @grant        GM_registerMenuCommand
// @grant        GM_openInTab
// @grant        GM_addStyle
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';

    const DOWNSUB_URL = 'https://downsub.com/';

    // 添加样式
    GM_addStyle(`
        .subtitle-ease-btn {
            position: fixed;
            bottom: 20px;
            right: 20px;
            background-color: #4CAF50;
            color: white;
            padding: 10px 20px;
            border: none;
            border-radius: 5px;
            cursor: pointer;
            z-index: 9999;
        }
        .subtitle-ease-btn:hover {
            background-color: #45a049;
        }
    `);

    // 创建下载按钮
    function createDownloadButton() {
        const button = document.createElement('button');
        button.textContent = '下载字幕';
        button.className = 'subtitle-ease-btn';
        button.addEventListener('click', openDownSubTab);
        document.body.appendChild(button);
    }

    // 打开 DownSub 标签页
    function openDownSubTab() {
        const currentURL = encodeURIComponent(window.location.href);
        const downsubURL = `${DOWNSUB_URL}?url=${currentURL}`;
        GM_openInTab(downsubURL, { active: true });
    }

    // 注册菜单命令
    GM_registerMenuCommand("下载字幕", openDownSubTab);

    // 创建下载按钮
    createDownloadButton();

    // 监听 URL 变化（用于单页应用）
    let lastUrl = location.href;
    new MutationObserver(() => {
        const url = location.href;
        if (url !== lastUrl) {
            lastUrl = url;
            // 重新创建按钮，确保在页面切换后仍然存在
            const existingButton = document.querySelector('.subtitle-ease-btn');
            if (existingButton) {
                existingButton.remove();
            }
            createDownloadButton();
        }
    }).observe(document, { subtree: true, childList: true });

})();