// Dodaj to do inc/config.php na końcu pliku przed ?>

// ==========================================
// ANTHROPIC API - optymalizacja tras AI
// ==========================================

define('ANTHROPIC_API_KEY', 'sk-ant-api03-TWOJ_KLUCZ'); // Wstaw swój klucz

function callAnthropicAPI(string $prompt): ?array {
    if (!defined('ANTHROPIC_API_KEY') || ANTHROPIC_API_KEY === '' || strpos(ANTHROPIC_API_KEY, 'TWOJ') !== false) {
        return null;
    }
    
    $data = [
        'model' => 'claude-sonnet-4-20250514',
        'max_tokens' => 2000,
        'messages' => [
            ['role' => 'user', 'content' => $prompt]
        ]
    ];
    
    $ch = curl_init('https://api.anthropic.com/v1/messages');
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, [
        'Content-Type: application/json',
        'x-api-key: ' . ANTHROPIC_API_KEY,
        'anthropic-version: 2023-06-01'
    ]);
    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
    curl_setopt($ch, CURLOPT_TIMEOUT, 30);
    
    $response = curl_exec($ch);
    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);
    
    if ($httpCode === 200 && $response) {
        $decoded = json_decode($response, true);
        if (isset($decoded['content'][0]['text'])) {
            $text = $decoded['content'][0]['text'];
            $jsonMatch = null;
            if (preg_match('/\{.*\}/s', $text, $jsonMatch)) {
                return json_decode($jsonMatch[0], true);
            }
        }
    }
    
    return null;
}

// ==========================================
// FORMATOWANIE
// ==========================================

function formatFileSize(int $bytes): string {
    if ($bytes >= 1048576) {
        return number_format($bytes / 1048576, 2) . ' MB';
    } elseif ($bytes >= 1024) {
        return number_format($bytes / 1024, 1) . ' KB';
    }
    return $bytes . ' B';
}

function calculateDistance(float $lat1, float $lon1, float $lat2, float $lon2): float {
    $earthRadius = 6371; // km
    $dLat = deg2rad($lat2 - $lat1);
    $dLon = deg2rad($lon2 - $lon1);
    $a = sin($dLat/2) * sin($dLat/2) + cos(deg2rad($lat1)) * cos(deg2rad($lat2)) * sin($dLon/2) * sin($dLon/2);
    $c = 2 * atan2(sqrt($a), sqrt(1-$a));
    return $earthRadius * $c;
}