// ==UserScript==
// @name         多平台镜像站自动转换（带开关）
// @namespace    http://tampermonkey.net/
// @version      1.4
// @description  可开关的镜像站转换：支持GreasyFork、GitHub、Chrome商店，带红色标记
// @author       平凡的世界
// @match        *://*/*
// @grant        GM_getValue
// @grant        GM_setValue
// @grant        GM_registerMenuCommand
// @run-at       document-end
// ==/UserScript==

(function() {
    'use strict';

    const DEFAULT_SETTINGS = {
        greasyforkEnabled: true,
        githubEnabled: true,
        chromeEnabled: true
    };
    let settings = GM_getValue('mirrorSettings', DEFAULT_SETTINGS);

    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) {
            let isEnabled = true;
            if (platform.original === 'greasyfork.org') isEnabled = settings.greasyforkEnabled;
            if (platform.original === 'github.com') isEnabled = settings.githubEnabled;
            if (platform.original === 'chrome.google.com') isEnabled = settings.chromeEnabled;
            if (!isEnabled) continue;

            if (platform.regex.test(href)) {
                let mirrorUrl;
                if (platform.original === 'chrome.google.com') {
                    const match = href.match(platform.regex);
                    mirrorUrl = `https://${platform.mirror}/${match[1]}`;
                } 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';
                break;
            }
        }
    }

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

    const observer = new MutationObserver(mutations => {
        mutations.forEach(mutation => {
            mutation.addedNodes.forEach(node => {
                if (node.nodeType === 1) {
                    node.tagName === 'A' ? replaceLink(node) : node.querySelectorAll('a[href]').forEach(replaceLink);
                }
            });
        });
    });
    observer.observe(document.body, { childList: true, subtree: true });
    replaceAllLinks();

    GM_registerMenuCommand('镜像站转换开关', showSettingsDialog);

    function showSettingsDialog() {
        const dialog = document.createElement('div');
        dialog.style.cssText = `
            position:fixed; top:50%; left:50%; transform:translate(-50%,-50%);
            background:#fff; padding:20px; border:1px solid #ccc; z-index:9999;
            box-shadow:0 0 10px rgba(0,0,0,0.3); width:300px; font-family:Arial,sans-serif;
        `;

        const title = document.createElement('div');
        title.textContent = '镜像站转换开关';
        title.style.cssText = 'font-size:16px; font-weight:bold; margin-bottom:15px;';

        const createSwitch = (label, key) => {
            const div = document.createElement('div');
            const input = document.createElement('input');
            input.type = 'checkbox';
            input.checked = settings[key];
            input.onchange = () => (settings[key] = input.checked);
            const span = document.createElement('span');
            span.textContent = label;
            span.style.marginLeft = '5px';
            div.appendChild(input);
            div.appendChild(span);
            return div;
        };

        const items = [
            createSwitch('GreasyFork 转换', 'greasyforkEnabled'),
            createSwitch('GitHub 转换', 'githubEnabled'),
            createSwitch('Chrome商店 转换', 'chromeEnabled')
        ];

        const saveBtn = document.createElement('button');
        saveBtn.textContent = '保存';
        saveBtn.style.cssText = 'margin-top:15px; padding:5px 10px;';
        saveBtn.onclick = () => {
            GM_setValue('mirrorSettings', settings);
            dialog.remove();
            mask.remove();
        };

        const mask = document.createElement('div');
        mask.style.cssText = `
            position:fixed; top:0; left:0; right:0; bottom:0;
            background:rgba(0,0,0,0.3); z-index:9998;
        `;
        mask.onclick = () => {
            dialog.remove();
            mask.remove();
        };

        dialog.appendChild(title);
        items.forEach(item => dialog.appendChild(item));
        dialog.appendChild(saveBtn);
        document.body.appendChild(mask);
        document.body.appendChild(dialog);
    }
})();