// ==UserScript==
// @name         anti-rickroll
// @version      13.0
// @description  修复了bug
// @author       dext
// @match        *://*/*
// @grant        GM_xmlhttpRequest
// @grant        GM_addStyle
// @connect      anti-rickroll.dext.top
// @run-at       document-start
// @namespace http://tampermonkey.net/
// @downloadURL https://update.greasyfork.icu/scripts/565531/anti-rickroll.user.js
// @updateURL https://update.greasyfork.icu/scripts/565531/anti-rickroll.meta.js
// ==/UserScript==

(function() {
    'use strict';

    const API_ENDPOINT = "https://anti-rickroll.dext.top";
    const cache = new Map();
    const host = window.location.hostname;

    // 状态判定
    const isForcePass = window.location.hash.includes('force-pass') || window.location.search.includes('force-pass');
    const isInfra = ["cloudflare.com", "workers.dev", "tampermonkey.net", "github.com", "greasyfork.org"].some(d => host.includes(d));

    GM_addStyle(`
        #rick-breaker-overlay { position: fixed; top:0; left:0; width:100%; height:100%; background:rgba(0,0,0,0.98); z-index:2147483647; display:flex; justify-content:center; align-items:center; backdrop-filter:blur(25px); }
        .rick-card { background:#fff; padding:40px; border-radius:24px; width:360px; text-align:center; border:6px solid #ff4444; box-shadow: 0 20px 60px rgba(0,0,0,0.8); font-family: sans-serif; }
        .rick-btn { padding:15px; border-radius:12px; cursor:pointer; border:none; font-weight:bold; width:100%; margin-top:15px; font-size:16px; transition: 0.2s; }
        .btn-safe { background:#eee; color:#333; }
        .btn-danger { background:#ff4444; color:#fff; font-size:11px; opacity:0.5; }
        .btn-appeal { background: transparent; color: #888; font-size: 12px; margin-top: 10px; text-decoration: underline; cursor: pointer; border: none; }
        #rick-report-btn { position: fixed; bottom: 20px; left: 20px; z-index: 2147483646; background: rgba(0,0,0,0.7); color: white; padding: 8px 15px; border-radius: 20px; cursor: pointer; font-size: 13px; backdrop-filter: blur(5px); border: 1px solid rgba(255,255,255,0.2); display: flex; align-items: center; gap: 8px; }
    `);

    // --- 工具函数 ---
    function getCleanUrl(url) {
        try {
            const u = new URL(url);
            if (u.hostname.includes('google.com') && u.searchParams.has('q')) return u.searchParams.get('q');
            if (u.hostname.includes('baidu.com') && u.searchParams.has('url')) return u.searchParams.get('url');
            if (u.hostname.includes('bing.com') && u.pathname.includes('/ck/a')) {
                let rawU = u.searchParams.get('u');
                if (rawU) { try { return atob(rawU.substring(2).replace(/-/g, '+').replace(/_/g, '/')); } catch (e) {} }
            }
            return u.origin + u.pathname + u.search;
        } catch (e) { return url; }
    }

    function silenceMedia() {
        document.querySelectorAll('video, audio').forEach(m => { m.pause(); m.muted = true; });
    }

    // --- UI 渲染 ---
    function renderOverlay(title, url, isIncoming = false) {
        if (document.getElementById('rick-breaker-overlay')) return;
        const silencer = setInterval(silenceMedia, 200);
        const overlay = document.createElement('div');
        overlay.id = 'rick-breaker-overlay';
        overlay.innerHTML = `<div class="rick-card">
            <div style="font-size:50px">🛑</div>
            <h2 style="color:#ff4444; margin:10px 0;">${title}</h2>
            <p style="color:#444; font-size:13px;">此路径被识别为 <b>Rickroll</b>。</p>
            <button class="rick-btn btn-safe" id="r-back">${isIncoming ? '离开' : '关闭'}</button>
            <button class="rick-btn btn-danger" id="r-go">我非要看</button>
            <button class="btn-appeal" id="r-appeal">这是误报？点我申诉</button>
        </div>`;
        document.body.appendChild(overlay);

        document.getElementById('r-back').onclick = () => {
            clearInterval(silencer);
            if(isIncoming) { window.history.length > 1 ? window.history.back() : window.close(); }
            else { overlay.remove(); }
        };
        document.getElementById('r-appeal').onclick = (e) => {
            e.target.innerText = "正在复审...";
            GM_xmlhttpRequest({
                method: "POST", url: API_ENDPOINT,
                data: JSON.stringify({ url, isAppeal: true, title: document.title }),
                headers: { "Content-Type": "application/json" },
                onload: (res) => {
                    const d = JSON.parse(res.responseText);
                    if (!d.isRickroll) { e.target.innerText = "✅ 申诉成功"; window.location.replace(url + (url.includes('#') ? '&' : '#') + 'force-pass'); }
                    else { e.target.innerText = "❌ 申诉失败"; setTimeout(()=>e.target.innerText="这是误报？点我申诉", 2000); }
                }
            });
        };
        document.getElementById('r-go').onclick = () => {
            clearInterval(silencer); overlay.remove();
            window.location.replace(url + (url.includes('#') ? '&' : '#') + 'force-pass');
        };
    }

    // --- 核心监听：点击拦截 (始终运行) ---
    window.addEventListener('click', (e) => {
        const a = e.target.closest('a');
        if (!a || !a.href.startsWith('http')) return;
        const url = getCleanUrl(a.href);
        // 如果点击的是内链，或者是已经放行的链接，不拦截
        if (new URL(url).hostname === host || url.includes('force-pass')) return;

        e.preventDefault(); e.stopPropagation();
        GM_xmlhttpRequest({
            method: "POST", url: API_ENDPOINT, data: JSON.stringify({ url }),
            headers: { "Content-Type": "application/json" },
            onload: (res) => {
                const d = JSON.parse(res.responseText);
                if (d.isRickroll) renderOverlay("实时风险拦截", url, false);
                else { window.open(a.href, a.target || '_self'); }
            },
            onerror: () => { window.open(a.href, a.target || '_self'); }
        });
    }, true);

    // --- 举报按钮 (仅在非放行、非白名单页显示) ---
    function createReportButton() {
        if (isForcePass || isInfra || document.getElementById('rick-report-btn')) return;
        const btn = document.createElement('div');
        btn.id = 'rick-report-btn';
        btn.innerHTML = `<span id="rick-do-report">🛡️ 我被骗了!</span>`;
        document.body.appendChild(btn);
        btn.onclick = () => {
            btn.innerText = "🔍 复审中...";
            GM_xmlhttpRequest({
                method: "POST", url: API_ENDPOINT,
                data: JSON.stringify({ url: window.location.href, isFeedback: true, title: document.title, snippet: document.body.innerText.substring(0, 500) }),
                headers: { "Content-Type": "application/json" },
                onload: (res) => {
                    if (JSON.parse(res.responseText).isRickroll) { btn.innerText = "✅ 举报成功"; renderOverlay("举报生效拦截", window.location.href, true); }
                    else { btn.innerText = "❌ 判定安全"; setTimeout(() => btn.remove(), 2000); }
                }
            });
        };
    }

    // --- 入境自检 (放行页和白名单页跳过) ---
    if (!isForcePass && !isInfra && !/google|baidu|bing/.test(host)) {
        GM_xmlhttpRequest({
            method: "POST", url: API_ENDPOINT, data: JSON.stringify({ url: window.location.href }),
            headers: { "Content-Type": "application/json" },
            onload: (res) => {
                try { if (JSON.parse(res.responseText).isRickroll) { window.stop(); renderOverlay("入境风险拦截", window.location.href, true); } } catch(e) {}
            }
        });
    }

    window.addEventListener('load', createReportButton);
})();