// ==UserScript==
// @name         多平台镜像站自动转换（带标记）
// @version      1.0
// @description  自动替换GreasyFork、GitHub、Chrome商店链接为镜像站，添加红色"（已转换）"标记
// @author       平凡的世界
// @match        *://*/*
// @grant        none
// @run-at       document-end
// ==/UserScript==

(function() {
    'use strict';

    const PLATFORMS = [
        {
            original: 'greasyfork.org',
            mirror: 'greasyfork.icu',
            regex: /^https:\/\/greasyfork\.org(\/.*)?$/
        },
        {
            original: 'github.com',
            mirror: 'kkgithub.com',
            regex: /^https:\/\/github\.com(\/.*)?$/
        },
        {
            original: 'chrome.google.com',
            mirror: 'www.crxsoso.com/webs/det',
            regex: /^https:\/\/chrome\.google\.com\/webstore\/detail\/[^\/]+\/([a-zA-Z0-9]+)$/
        }
    ];

    function replaceLink(link) {
        const href = link.href;
        if (link.dataset.linkReplaced) return;

        for (const platform of PLATFORMS) {
            if (platform.regex.test(href)) {
                let mirrorUrl;
                if (platform.original === 'chrome.google.com') {
                    const match = href.match(platform.regex);
                    const extensionId = match[1];
                    mirrorUrl = `https://${platform.mirror}/${extensionId}`;
                } else {
                    mirrorUrl = href.replace(platform.original, platform.mirror);
                }

                link.href = mirrorUrl;

                const tag = document.createElement('span');
                tag.textContent = '（已转换）';
                tag.style.color = 'red';
                tag.style.marginLeft = '5px';
                tag.style.fontSize = '0.8em';
                link.parentNode.insertBefore(tag, link.nextSibling);

                link.dataset.linkReplaced = 'true';
                console.log(`已转换${platform.original}链接：${href} → ${mirrorUrl}`);
                break;
            }
        }
    }

    function replaceAllLinks() {
        document.querySelectorAll('a[href]').forEach(link => replaceLink(link));
    }

    const observer = new MutationObserver((mutations) => {
        mutations.forEach(mutation => {
            mutation.addedNodes.forEach(node => {
                if (node.nodeType === 1) {
                    if (node.tagName === 'A') {
                        replaceLink(node);
                    } else {
                        node.querySelectorAll('a[href]').forEach(link => replaceLink(link));
                    }
                }
            });
        });
    });

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

    replaceAllLinks();
})();