// ==UserScript==
// @name              极速去除链接重定向
// @author            Meriel & 优化版
// @description       纯前端解析，无网络请求，跳转秒开
// @version           2.0.0
// @namespace         Violentmonkey Scripts
// @grant             none
// @match             *://*/*
// @run-at            document-end
// @license           MIT
// @downloadURL https://update.greasyfork.icu/scripts/574775/%E6%9E%81%E9%80%9F%E5%8E%BB%E9%99%A4%E9%93%BE%E6%8E%A5%E9%87%8D%E5%AE%9A%E5%90%91.user.js
// @updateURL https://update.greasyfork.icu/scripts/574775/%E6%9E%81%E9%80%9F%E5%8E%BB%E9%99%A4%E9%93%BE%E6%8E%A5%E9%87%8D%E5%AE%9A%E5%90%91.meta.js
// ==/UserScript==

(function () {
  'use strict';

  // 页面进入直接跳转类（秒跳）
  const jumpRules = [
    { test: /coolapk\.com\/link\?.*url=/, get: u => new URL(u).searchParams.get('url') },
    { test: /link\.csdn\.net\/\?.*target=/, get: u => new URL(u).searchParams.get('target') },
    { test: /support\.qq\.com\/.*link-jump\?jump=/, get: u => new URL(u).searchParams.get('jump') },
    { test: /mail\.qq\.com\/.*gourl=/, get: u => new URL(u).searchParams.get('gourl') },
    { test: /yinxiang\.com\/OutboundRedirect\.action\?.*dest=/, get: u => new URL(u).searchParams.get('dest') },
    { test: /youtube\.com\/redirect\?.*q=/, get: u => new URL(u).searchParams.get('q') },
    { test: /developers\.weixin\.qq\.com\/.*href=/, get: u => new URL(u).searchParams.get('href') },
    { test: /pc6\.com\/.*gourl=/, get: u => new URL(u).searchParams.get('gourl') },
    { test: /blog\.51cto\.com\/transfer\?/, get: u => new URL(u).searchParams.get('url') },
    { test: /c\.pc\.qq\.com.*pfurl=/, get: u => new URL(u).searchParams.get('pfurl') },
    { test: /c\.pc\.qq\.com.*url=/, get: u => new URL(u).searchParams.get('url') },
    { test: /\.urlshare\..+\/.*url=/, get: u => new URL(u).searchParams.get('url') },
    { test: /docs\.qq\.com\/.*\?url=/, get: u => new URL(u).searchParams.get('url') },
    { test: /kdocs\.cn\/office\/link\?.*target=/, get: u => new URL(u).searchParams.get('target') },
    { test: /nodeseek\.com\/jump\?.*to=/, get: u => new URL(u).searchParams.get('to') },
    { test: /wx\.mail\.qq\.com\/xmspamcheck\/xmsafejump\?/, get: u => new URL(u).searchParams.get('url') },
  ];

  // 进入页面就直接跳转，不等待任何加载
  const current = location.href;
  for (const r of jumpRules) {
    if (r.test.test(current)) {
      try {
        const real = decodeURIComponent(r.get(current));
        if (real && real.startsWith('http')) {
          location.replace(real);
          return;
        }
      } catch {}
    }
  }

  // 页面内链接替换（纯前端，无异步、无网络）
  const linkRules = [
    { test: /link\.juejin\.(cn|im)\/\?target=/, get: u => new URL(u).searchParams.get('target') },
    { test: /zhihu\.com\/\?target=/, get: u => new URL(u).searchParams.get('target') },
    { test: /link\.zhihu\.com\/\?target=/, get: u => new URL(u).searchParams.get('target') },
    { test: /douban\.com\/link2.*\?url=/, get: u => new URL(u).searchParams.get('url') },
    { test: /sspai\.com\/link\?target=/, get: u => new URL(u).searchParams.get('target') },
    { test: /gitee\.com\/link\?target=/, get: u => new URL(u).searchParams.get('target') },
    { test: /infoq\.cn\/link\?target=/, get: u => new URL(u).searchParams.get('target') },
    { test: /steamcommunity\.com\/linkfilter\/\?url=/, get: u => new URL(u).searchParams.get('url') },
    { test: /weibo\.com\/sinaurl\?u=/, get: u => new URL(u).searchParams.get('u') },
    { test: /afdian\.net\/link\?target=/, get: u => new URL(u).searchParams.get('target') },
    { test: /oschina\.net\/action\/GoToLink\?url=/, get: u => new URL(u).searchParams.get('url') },
    { test: /leetcode\.(cn|com)\/link\?target=/, get: u => new URL(u).searchParams.get('target') },
    { test: /51\.ruyo\.net.*\?u=/, get: u => new URL(u).searchParams.get('u') },
    { test: /bing\.com\/ck\/a\?/, get: u => null }, // 不处理，避免慢
    { test: /baidu\.com\/link\?url=/, get: u => null }, // 不请求，只走前端
  ];

  const done = 'data-redirect-fixed';

  function fixLink(a) {
    if (a[done]) return;
    a[done] = 1;
    const href = a.href;
    if (!href) return;

    for (const r of linkRules) {
      if (r.test.test(href)) {
        try {
          const real = r.get(href);
          if (real && real.startsWith('http')) {
            a.href = decodeURIComponent(real);
          }
        } catch {}
        break;
      }
    }
  }

  // 一次性批量处理
  document.querySelectorAll('a').forEach(fixLink);

  // 极简监听新节点
  const ob = new MutationObserver(ns => {
    for (const n of ns) {
      n.addedNodes.forEach(el => {
        if (el.tagName === 'A') fixLink(el);
        else el.querySelectorAll?.('a').forEach(fixLink);
      });
    }
  });

  ob.observe(document.body, { childList: true, subtree: true });

})();