// Database configuration
define('DB_HOST', 'localhost');
define('DB_NAME', 'blon3854_ai');
define('DB_USER', 'blon3854_ai');
define('DB_PASS', 'Matematika14$');

// Platform configuration
define('SITE_URL', 'https://blockanta.com');
define('SITE_NAME', 'BLOCKANTA');
define('SITE_TAGLINE_EN', 'Craft Your Future Home in Immersive 3D');
define('SITE_TAGLINE_AR', 'صمم بيتك المستقبلي بتجربة ثلاثية الأبعاد غامرة');
define('DEFAULT_LANG', 'en');

// File upload configuration
define('MAX_UPLOAD_SIZE', 50 * 1024 * 1024); // 50MB
define('ALLOWED_3D_EXTENSIONS', ['gltf', 'glb', 'obj']);
define('UPLOAD_DIR', __DIR__ . '/../uploads/');
define('MODEL_DIR', __DIR__ . '/../assets/models/');

// Security
define('SESSION_TIMEOUT', 3600 * 24); // 24 hours
define('BCRYPT_COST', 12);

// 3D Render settings
define('DEFAULT_QUALITY', 'medium');
define('MAX_FREE_MODELS', 5);
define('MAX_PRO_MODELS', 9999);

// Social Media (All unified as @blockanta)
$social_media = [
    'instagram' => 'https://instagram.com/blockanta',
    'twitter' => 'https://twitter.com/blockanta',
    'facebook' => 'https://facebook.com/blockanta',
    'linkedin' => 'https://linkedin.com/blockanta',
    'youtube' => 'https://youtube.com/@blockanta',
    'tiktok' => 'https://tiktok.com/@blockanta',
    'telegram' => 'https://t.me/blockanta',
    'discord' => 'https://discord.gg/blockanta',
    'reddit' => 'https://reddit.com/r/blockanta',
    'github' => 'https://github.com/blockanta'
];

// Start session
session_start();

// Set default headers for CORS and UTF-8
header('Content-Type: text/html; charset=utf-8');
header('X-Frame-Options: DENY');
header('X-Content-Type-Options: nosniff');

// Error reporting (disable in production)
error_reporting(E_ALL);
ini_set('display_errors', 1);
?>
require_once 'config.php';

class Database {
    private $pdo;
    private static $instance = null;

    private function __construct() {
        try {
            $dsn = "mysql:host=" . DB_HOST . ";dbname=" . DB_NAME . ";charset=utf8mb4";
            $this->pdo = new PDO($dsn, DB_USER, DB_PASS);
            $this->pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
            $this->pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
        } catch (PDOException $e) {
            die("Database connection failed: " . $e->getMessage());
        }
    }

    public static function getInstance() {
        if (self::$instance === null) {
            self::$instance = new Database();
        }
        return self::$instance;
    }

    public function getConnection() {
        return $this->pdo;
    }

    // Prepared statement helper
    public function prepare($sql) {
        return $this->pdo->prepare($sql);
    }
}

// Authentication Class
class Auth {
    private $db;
    
    public function __construct() {
        $this->db = Database::getInstance()->getConnection();
    }

    public function register($userData) {
        $sql = "INSERT INTO users (username, email, password_hash, full_name, country, language) 
                VALUES (:username, :email, :password_hash, :full_name, :country, :language)";
        
        $stmt = $this->db->prepare($sql);
        $password_hash = password_hash($userData['password'], PASSWORD_BCRYPT, ['cost' => BCRYPT_COST]);
        
        return $stmt->execute([
            ':username' => $userData['username'],
            ':email' => $userData['email'],
            ':password_hash' => $password_hash,
            ':full_name' => $userData['full_name'],
            ':country' => $userData['country'],
            ':language' => $userData['language'] ?? DEFAULT_LANG
        ]);
    }

    public function login($email, $password) {
        $sql = "SELECT * FROM users WHERE email = :email AND status = 'active'";
        $stmt = $this->db->prepare($sql);
        $stmt->execute([':email' => $email]);
        $user = $stmt->fetch();

        if ($user && password_verify($password, $user['password_hash'])) {
            // Update last login
            $update_sql = "UPDATE users SET last_login = NOW() WHERE id = :id";
            $update_stmt = $this->db->prepare($update_sql);
            $update_stmt->execute([':id' => $user['id']]);

            // Set session
            $_SESSION['user_id'] = $user['id'];
            $_SESSION['username'] = $user['username'];
            $_SESSION['email'] = $user['email'];
            $_SESSION['role'] = $user['role'];
            $_SESSION['language'] = $user['language'];
            $_SESSION['subscription'] = $user['subscription'];
            $_SESSION['logged_in'] = true;

            return true;
        }
        return false;
    }

    public function logout() {
        session_destroy();
        session_start();
    }

    public function isLoggedIn() {
        return isset($_SESSION['logged_in']) && $_SESSION['logged_in'] === true;
    }

    public function isAdmin() {
        return $this->isLoggedIn() && $_SESSION['role'] === 'admin';
    }

    public function getUser($id = null) {
        if (!$id && $this->isLoggedIn()) {
            $id = $_SESSION['user_id'];
        }

        $sql = "SELECT * FROM users WHERE id = :id";
        $stmt = $this->db->prepare($sql);
        $stmt->execute([':id' => $id]);
        return $stmt->fetch();
    }
}
?>class Language {
    private $db;
    private $current_lang;
    private $translations = [];

    public function __construct() {
        $this->db = Database::getInstance()->getConnection();
        $this->current_lang = $this->detectLanguage();
        $this->loadTranslations();
    }

    private function detectLanguage() {
        // Priority: 1. User preference, 2. Session, 3. Browser, 4. Default
        if (isset($_SESSION['language'])) {
            return $_SESSION['language'];
        }

        if (isset($_COOKIE['blockanta_lang'])) {
            return $_COOKIE['blockanta_lang'];
        }

        $browser_lang = substr($_SERVER['HTTP_ACCEPT_LANGUAGE'], 0, 2);
        return in_array($browser_lang, ['en', 'ar']) ? $browser_lang : DEFAULT_LANG;
    }

    private function loadTranslations() {
        $sql = "SELECT content_key, content_en, content_ar FROM multilingual_content";
        $stmt = $this->db->prepare($sql);
        $stmt->execute();

        while ($row = $stmt->fetch()) {
            $this->translations[$row['content_key']] = [
                'en' => $row['content_en'],
                'ar' => $row['content_ar']
            ];
        }
    }

    public function get($key, $params = []) {
        if (!isset($this->translations[$key])) {
            return "[$key]";
        }

        $text = $this->translations[$key][$this->current_lang];
        
        // Replace parameters
        foreach ($params as $param => $value) {
            $text = str_replace("{{$param}}", $value, $text);
        }

        return $text;
    }

    public function setLanguage($lang) {
        if (in_array($lang, ['en', 'ar'])) {
            $this->current_lang = $lang;
            $_SESSION['language'] = $lang;
            setcookie('blockanta_lang', $lang, time() + (365 * 24 * 60 * 60), '/');
            
            // Update user preference if logged in
            if (isset($_SESSION['user_id'])) {
                $sql = "UPDATE users SET language = :lang WHERE id = :id";
                $stmt = $this->db->prepare($sql);
                $stmt->execute([':lang' => $lang, ':id' => $_SESSION['user_id']]);
            }
        }
    }

    public function getCurrentLanguage() {
        return $this->current_lang;
    }

    public function isRTL() {
        return $this->current_lang === 'ar';
    }

    public function getDirection() {
        return $this->isRTL() ? 'rtl' : 'ltr';
    }

    // Generate language switcher HTML
    public function generateSwitcher() {
        $current = $this->current_lang;
        $other = $current === 'en' ? 'ar' : 'en';
        $current_name = $current === 'en' ? 'English' : 'العربية';
        $other_name = $other === 'en' ? 'English' : 'العربية';

        return '
        <div class="language-switcher">
            <button class="lang-btn" data-lang="' . $current . '">
                ' . ($current === 'ar' ? '🇸🇦' : '🇺🇸') . ' ' . $current_name . '
            </button>
            <div class="lang-dropdown">
                <a href="#" class="lang-option" data-lang="' . $other . '">
                    ' . ($other === 'ar' ? '🇸🇦' : '🇺🇸') . ' ' . $other_name . '
                </a>
            </div>
        </div>';
    }
}

// Initialize language system
$lang = new Language();
?>