<?php
/**
 * Amnezia VPN Web Panel
 * Main entry point
 */

session_name(getenv('SESSION_NAME') ?: 'amnezia_panel_session');
session_start();

// Load dependencies
require_once __DIR__ . '/../vendor/autoload.php';
require_once __DIR__ . '/../inc/Config.php';
require_once __DIR__ . '/../inc/DB.php';
require_once __DIR__ . '/../inc/Auth.php';
require_once __DIR__ . '/../inc/Router.php';
require_once __DIR__ . '/../inc/View.php';
require_once __DIR__ . '/../inc/VpnServer.php';
require_once __DIR__ . '/../inc/VpnClient.php';
require_once __DIR__ . '/../inc/Translator.php';
require_once __DIR__ . '/../inc/JWT.php';

// Load environment configuration
Config::load(__DIR__ . '/../.env');

// Test database connection
try {
    DB::conn();
} catch (Throwable $e) {
    die('Database connection error: ' . $e->getMessage());
}

// Seed admin user if not exists
try {
    $adminEmail = Config::get('ADMIN_EMAIL');
    $adminPass = Config::get('ADMIN_PASSWORD');
    if ($adminEmail && $adminPass) {
        Auth::seedAdmin($adminEmail, $adminPass);
    }
} catch (Throwable $e) {
    // Ignore errors
}

// Initialize translator
Translator::init();

// Initialize template engine
$user = Auth::user();
$appName = Config::get('APP_NAME', 'Amnezia VPN Panel');

View::init(__DIR__ . '/../templates', [
    'app_name' => $appName,
    'user' => $user,
    'current_language' => Translator::getCurrentLanguage(),
    'languages' => Translator::getSupportedLanguages(),
    'current_uri' => $_SERVER['REQUEST_URI'] ?? '/dashboard',
    't' => function($key, $params = []) {
        return Translator::t($key, $params);
    }
]);

// Helper function for redirects
function redirect(string $to): void {
    header('Location: ' . $to);
    exit;
}

// Helper function to require authentication
function requireAuth(): void {
    if (!Auth::check()) {
        redirect('/login');
    }
}

// Helper function to require admin
function requireAdmin(): void {
    requireAuth();
    if (!Auth::isAdmin()) {
        http_response_code(403);
        echo 'Forbidden: Admin access required';
        exit;
    }
}

/**
 * PUBLIC ROUTES
 */

// Home page
Router::get('/', function () {
    if (!Auth::check()) {
        redirect('/login');
    }
    redirect('/dashboard');
});

// Login page
Router::get('/login', function () {
    if (Auth::check()) {
        redirect('/dashboard');
    }
    View::render('login.twig');
});

Router::post('/login', function () {
    $email = trim($_POST['email'] ?? '');
    $password = $_POST['password'] ?? '';
    
    if (Auth::login($email, $password)) {
        redirect('/dashboard');
    }
    
    View::render('login.twig', ['error' => 'Invalid credentials']);
});

// Register page
Router::get('/register', function () {
    if (Auth::check()) {
        redirect('/dashboard');
    }
    View::render('register.twig');
});

Router::post('/register', function () {
    $name = trim($_POST['name'] ?? '');
    $email = trim($_POST['email'] ?? '');
    $password = $_POST['password'] ?? '';
    
    if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
        View::render('register.twig', ['error' => 'Invalid email address']);
        return;
    }
    
    if (strlen($password) < 6) {
        View::render('register.twig', ['error' => 'Password must be at least 6 characters']);
        return;
    }
    
    try {
        $success = Auth::register($name, $email, $password);
        if ($success) {
            Auth::login($email, $password);
            redirect('/dashboard');
        }
    } catch (Throwable $e) {
        // Email already exists or other error
    }
    
    View::render('register.twig', ['error' => 'Registration failed. Email may already be in use.']);
});

// Logout
Router::get('/logout', function () {
    Auth::logout();
    redirect('/login');
});

/**
 * AUTHENTICATED ROUTES
 */

// Dashboard
Router::get('/dashboard', function () {
    requireAuth();
    $user = Auth::user();
    
    // Get user's servers
    $servers = VpnServer::listByUser($user['id']);
    
    // Get user's clients
    $clients = VpnClient::listByUser($user['id']);
    
    View::render('dashboard.twig', [
        'servers' => $servers,
        'clients' => $clients,
    ]);
});

// Servers list
Router::get('/servers', function () {
    requireAuth();
    $user = Auth::user();
    
    $servers = Auth::isAdmin() 
        ? VpnServer::listAll() 
        : VpnServer::listByUser($user['id']);
    
    View::render('servers/index.twig', ['servers' => $servers]);
});

// Create server page
Router::get('/servers/create', function () {
    requireAuth();
    View::render('servers/create.twig');
});

// Create server action
Router::post('/servers/create', function () {
    requireAuth();
    $user = Auth::user();
    
    $name = trim($_POST['name'] ?? '');
    $host = trim($_POST['host'] ?? '');
    $port = (int)($_POST['port'] ?? 22);
    $username = trim($_POST['username'] ?? 'root');
    $password = $_POST['password'] ?? '';
    
    if (empty($name) || empty($host) || empty($password)) {
        View::render('servers/create.twig', ['error' => 'All fields are required']);
        return;
    }
    
    try {
        $serverId = VpnServer::create([
            'user_id' => $user['id'],
            'name' => $name,
            'host' => $host,
            'port' => $port,
            'username' => $username,
            'password' => $password,
        ]);
        
        redirect('/servers/' . $serverId . '/deploy');
    } catch (Exception $e) {
        View::render('servers/create.twig', ['error' => $e->getMessage()]);
    }
});

// Delete server action
Router::post('/servers/{id}/delete', function ($params) {
    requireAuth();
    $user = Auth::user();
    $serverId = (int)$params['id'];
    
    try {
        $server = new VpnServer($serverId);
        $serverData = $server->getData();
        
        // Check ownership or admin
        if ($serverData['user_id'] != $user['id'] && !Auth::isAdmin()) {
            http_response_code(403);
            echo 'Forbidden';
            return;
        }
        
        $server->delete();
        $_SESSION['success_message'] = 'Server deleted successfully';
        redirect('/servers');
    } catch (Exception $e) {
        $_SESSION['error_message'] = $e->getMessage();
        redirect('/servers');
    }
});

// Deploy server page
Router::get('/servers/{id}/deploy', function ($params) {
    requireAuth();
    $serverId = (int)$params['id'];
    
    try {
        $server = new VpnServer($serverId);
        $serverData = $server->getData();
        
        // Check ownership
        $user = Auth::user();
        if ($serverData['user_id'] != $user['id'] && !Auth::isAdmin()) {
            http_response_code(403);
            echo 'Forbidden';
            return;
        }
        
        View::render('servers/deploy.twig', ['server' => $serverData]);
    } catch (Exception $e) {
        http_response_code(404);
        echo 'Server not found';
    }
});

// Deploy server action (AJAX)
Router::post('/servers/{id}/deploy', function ($params) {
    requireAuth();
    header('Content-Type: application/json');
    
    $serverId = (int)$params['id'];
    
    try {
        $server = new VpnServer($serverId);
        $serverData = $server->getData();
        
        // Check ownership
        $user = Auth::user();
        if ($serverData['user_id'] != $user['id'] && !Auth::isAdmin()) {
            http_response_code(403);
            echo json_encode(['error' => 'Forbidden']);
            return;
        }
        
        $result = $server->deploy();
        echo json_encode($result);
    } catch (Exception $e) {
        http_response_code(500);
        echo json_encode(['error' => $e->getMessage()]);
    }
});

// View server
Router::get('/servers/{id}', function ($params) {
    requireAuth();
    $serverId = (int)$params['id'];
    
    try {
        $server = new VpnServer($serverId);
        $serverData = $server->getData();
        
        // Check ownership
        $user = Auth::user();
        if ($serverData['user_id'] != $user['id'] && !Auth::isAdmin()) {
            http_response_code(403);
            echo 'Forbidden';
            return;
        }
        
        // Get clients for this server
        $clients = VpnClient::listByServer($serverId);
        
        View::render('servers/view.twig', [
            'server' => $serverData,
            'clients' => $clients,
        ]);
    } catch (Exception $e) {
        http_response_code(404);
        echo 'Server not found';
    }
});

// Delete server
Router::post('/servers/{id}/delete', function ($params) {
    requireAuth();
    $serverId = (int)$params['id'];
    
    try {
        $server = new VpnServer($serverId);
        $serverData = $server->getData();
        
        // Check ownership
        $user = Auth::user();
        if ($serverData['user_id'] != $user['id'] && !Auth::isAdmin()) {
            http_response_code(403);
            echo 'Forbidden';
            return;
        }
        
        $server->delete();
        redirect('/servers');
    } catch (Exception $e) {
        redirect('/servers');
    }
});

// Create client for server
Router::post('/servers/{id}/clients/create', function ($params) {
    requireAuth();
    $serverId = (int)$params['id'];
    $clientName = trim($_POST['name'] ?? '');
    
    if (empty($clientName)) {
        redirect('/servers/' . $serverId . '?error=Client+name+is+required');
        return;
    }
    
    try {
        $server = new VpnServer($serverId);
        $serverData = $server->getData();
        
        // Check ownership
        $user = Auth::user();
        if ($serverData['user_id'] != $user['id'] && !Auth::isAdmin()) {
            http_response_code(403);
            echo 'Forbidden';
            return;
        }
        
        $clientId = VpnClient::create($serverId, $user['id'], $clientName);
        redirect('/clients/' . $clientId);
    } catch (Exception $e) {
        redirect('/servers/' . $serverId . '?error=' . urlencode($e->getMessage()));
    }
});

// View client
Router::get('/clients/{id}', function ($params) {
    requireAuth();
    $clientId = (int)$params['id'];
    
    try {
        $client = new VpnClient($clientId);
        $clientData = $client->getData();
        
        // Check ownership
        $user = Auth::user();
        if ($clientData['user_id'] != $user['id'] && !Auth::isAdmin()) {
            http_response_code(403);
            echo 'Forbidden';
            return;
        }
        
        View::render('clients/view.twig', ['client' => $clientData]);
    } catch (Exception $e) {
        http_response_code(404);
        echo 'Client not found';
    }
});

// Download client config
Router::get('/clients/{id}/download', function ($params) {
    requireAuth();
    $clientId = (int)$params['id'];
    
    try {
        $client = new VpnClient($clientId);
        $clientData = $client->getData();
        
        // Check ownership
        $user = Auth::user();
        if ($clientData['user_id'] != $user['id'] && !Auth::isAdmin()) {
            http_response_code(403);
            echo 'Forbidden';
            return;
        }
        
        $config = $client->getConfig();
        $filename = preg_replace('/[^a-zA-Z0-9_-]/', '_', $clientData['name']) . '.conf';
        
        header('Content-Type: application/octet-stream');
        header('Content-Disposition: attachment; filename="' . $filename . '"');
        header('Content-Length: ' . strlen($config));
        echo $config;
    } catch (Exception $e) {
        http_response_code(404);
        echo 'Client not found';
    }
});

// Revoke client access
Router::post('/clients/{id}/revoke', function ($params) {
    requireAuth();
    $clientId = (int)$params['id'];
    
    try {
        $client = new VpnClient($clientId);
        $clientData = $client->getData();
        
        // Check ownership
        $user = Auth::user();
        if ($clientData['user_id'] != $user['id'] && !Auth::isAdmin()) {
            http_response_code(403);
            echo 'Forbidden';
            return;
        }
        
        if ($client->revoke()) {
            redirect('/servers/' . $clientData['server_id'] . '?success=Client+revoked');
        } else {
            redirect('/servers/' . $clientData['server_id'] . '?error=Failed+to+revoke+client');
        }
    } catch (Exception $e) {
        redirect('/dashboard?error=' . urlencode($e->getMessage()));
    }
});

// Restore client access
Router::post('/clients/{id}/restore', function ($params) {
    requireAuth();
    $clientId = (int)$params['id'];
    
    try {
        $client = new VpnClient($clientId);
        $clientData = $client->getData();
        
        // Check ownership
        $user = Auth::user();
        if ($clientData['user_id'] != $user['id'] && !Auth::isAdmin()) {
            http_response_code(403);
            echo 'Forbidden';
            return;
        }
        
        if ($client->restore()) {
            redirect('/servers/' . $clientData['server_id'] . '?success=Client+restored');
        } else {
            redirect('/servers/' . $clientData['server_id'] . '?error=Failed+to+restore+client');
        }
    } catch (Exception $e) {
        redirect('/dashboard?error=' . urlencode($e->getMessage()));
    }
});

// Delete client
Router::post('/clients/{id}/delete', function ($params) {
    requireAuth();
    $clientId = (int)$params['id'];
    
    try {
        $client = new VpnClient($clientId);
        $clientData = $client->getData();
        
        // Check ownership
        $user = Auth::user();
        if ($clientData['user_id'] != $user['id'] && !Auth::isAdmin()) {
            http_response_code(403);
            echo 'Forbidden';
            return;
        }
        
        $serverId = $clientData['server_id'];
        
        if ($client->delete()) {
            redirect('/servers/' . $serverId . '?success=Client+deleted');
        } else {
            redirect('/servers/' . $serverId . '?error=Failed+to+delete+client');
        }
    } catch (Exception $e) {
        redirect('/dashboard?error=' . urlencode($e->getMessage()));
    }
});

// Sync client stats
Router::post('/clients/{id}/sync-stats', function ($params) {
    requireAuth();
    $clientId = (int)$params['id'];
    
    header('Content-Type: application/json');
    
    try {
        $client = new VpnClient($clientId);
        $clientData = $client->getData();
        
        // Check ownership
        $user = Auth::user();
        if ($clientData['user_id'] != $user['id'] && !Auth::isAdmin()) {
            http_response_code(403);
            echo json_encode(['error' => 'Forbidden']);
            return;
        }
        
        if ($client->syncStats()) {
            // Reload client data
            $client = new VpnClient($clientId);
            $stats = $client->getFormattedStats();
            echo json_encode(['success' => true, 'stats' => $stats]);
        } else {
            echo json_encode(['success' => false, 'error' => 'Failed to sync stats']);
        }
    } catch (Exception $e) {
        http_response_code(500);
        echo json_encode(['error' => $e->getMessage()]);
    }
});

// Sync all stats for server
Router::post('/servers/{id}/sync-stats', function ($params) {
    requireAuth();
    $serverId = (int)$params['id'];
    
    header('Content-Type: application/json');
    
    try {
        $server = new VpnServer($serverId);
        $serverData = $server->getData();
        
        // Check ownership
        $user = Auth::user();
        if ($serverData['user_id'] != $user['id'] && !Auth::isAdmin()) {
            http_response_code(403);
            echo json_encode(['error' => 'Forbidden']);
            return;
        }
        
        $synced = VpnClient::syncAllStatsForServer($serverId);
        echo json_encode(['success' => true, 'synced' => $synced]);
    } catch (Exception $e) {
        http_response_code(500);
        echo json_encode(['error' => $e->getMessage()]);
    }
});

/**
 * API ROUTES (for Telegram bot integration)
 */

// API: Generate JWT token
Router::post('/api/auth/token', function () {
    header('Content-Type: application/json');
    
    $email = $_POST['email'] ?? '';
    $password = $_POST['password'] ?? '';
    
    if (empty($email) || empty($password)) {
        http_response_code(400);
        echo json_encode(['error' => 'Email and password are required']);
        return;
    }
    
    $user = Auth::getUserByEmail($email);
    if (!$user || !password_verify($password, $user['password_hash'])) {
        http_response_code(401);
        echo json_encode(['error' => 'Invalid credentials']);
        return;
    }
    
    try {
        $token = JWT::generate($user['id']);
        echo json_encode([
            'success' => true,
            'token' => $token,
            'type' => 'Bearer',
            'expires_in' => 30 * 24 * 3600 // 30 days
        ]);
    } catch (Exception $e) {
        http_response_code(500);
        echo json_encode(['error' => 'Token generation failed']);
    }
});

// API: Create persistent API token
Router::post('/api/tokens', function () {
    header('Content-Type: application/json');
    
    $user = JWT::requireAuth();
    if (!$user) return;
    
    $name = $_POST['name'] ?? 'API Token';
    $expiresIn = isset($_POST['expires_in']) ? (int)$_POST['expires_in'] : 2592000; // 30 days default
    
    try {
        $tokenData = JWT::createApiToken($user['id'], $name, $expiresIn);
        echo json_encode([
            'success' => true,
            'token' => $tokenData
        ]);
    } catch (Exception $e) {
        http_response_code(500);
        echo json_encode(['error' => $e->getMessage()]);
    }
});

// API: List user's API tokens
Router::get('/api/tokens', function () {
    header('Content-Type: application/json');
    
    $user = JWT::requireAuth();
    if (!$user) return;
    
    $stmt = DB::get()->prepare("
        SELECT id, name, token, expires_at, created_at, last_used_at
        FROM api_tokens
        WHERE user_id = ? AND revoked_at IS NULL
        ORDER BY created_at DESC
    ");
    $stmt->execute([$user['id']]);
    $tokens = $stmt->fetchAll();
    
    // Don't expose full token in list
    foreach ($tokens as &$token) {
        $token['token'] = substr($token['token'], 0, 10) . '...';
    }
    
    echo json_encode(['tokens' => $tokens]);
});

// API: Revoke API token
Router::delete('/api/tokens/{id}', function ($params) {
    header('Content-Type: application/json');
    
    $user = JWT::requireAuth();
    if (!$user) return;
    
    try {
        JWT::revokeApiToken($params['id'], $user['id']);
        echo json_encode(['success' => true]);
    } catch (Exception $e) {
        http_response_code(404);
        echo json_encode(['error' => $e->getMessage()]);
    }
});

// API: List servers
Router::get('/api/servers', function () {
    header('Content-Type: application/json');
    
    $user = JWT::requireAuth();
    if (!$user) return;
    
    $servers = VpnServer::listByUser($user['id']);
    echo json_encode(['servers' => $servers]);
});

// API: Create server
Router::post('/api/servers/create', function () {
    header('Content-Type: application/json');
    
    $user = JWT::requireAuth();
    if (!$user) return;
    
    $input = json_decode(file_get_contents('php://input'), true);
    
    $name = trim($input['name'] ?? '');
    $host = trim($input['host'] ?? '');
    $port = (int)($input['port'] ?? 22);
    $username = trim($input['username'] ?? 'root');
    $password = $input['password'] ?? '';
    
    if (empty($name) || empty($host) || empty($password)) {
        http_response_code(400);
        echo json_encode(['error' => 'Missing required fields: name, host, password']);
        return;
    }
    
    try {
        $serverId = VpnServer::create([
            'user_id' => $user['id'],
            'name' => $name,
            'host' => $host,
            'port' => $port,
            'username' => $username,
            'password' => $password,
        ]);
        
        http_response_code(201);
        echo json_encode([
            'success' => true,
            'server_id' => $serverId,
            'message' => 'Server created successfully'
        ]);
    } catch (Exception $e) {
        http_response_code(500);
        echo json_encode(['error' => $e->getMessage()]);
    }
});

// API: Delete server
Router::delete('/api/servers/{id}/delete', function ($params) {
    header('Content-Type: application/json');
    
    $user = JWT::requireAuth();
    if (!$user) return;
    
    $serverId = (int)$params['id'];
    
    try {
        $server = new VpnServer($serverId);
        $serverData = $server->getData();
        
        // Check ownership or admin
        if ($serverData['user_id'] != $user['id'] && $user['role'] !== 'admin') {
            http_response_code(403);
            echo json_encode(['error' => 'Forbidden']);
            return;
        }
        
        $server->delete();
        echo json_encode([
            'success' => true,
            'message' => 'Server deleted successfully'
        ]);
    } catch (Exception $e) {
        http_response_code(500);
        echo json_encode(['error' => $e->getMessage()]);
    }
});

// API: List clients
Router::get('/api/clients', function () {
    header('Content-Type: application/json');
    
    $user = JWT::requireAuth();
    if (!$user) return;
    
    $clients = VpnClient::listByUser($user['id']);
    echo json_encode(['clients' => $clients]);
});

// API: Get client details with stats
Router::get('/api/clients/{id}/details', function ($params) {
    header('Content-Type: application/json');
    
    $user = JWT::requireAuth();
    if (!$user) return;
    
    $clientId = (int)$params['id'];
    
    try {
        $client = new VpnClient($clientId);
        $clientData = $client->getData();
        
        // Check ownership
        if ($clientData['user_id'] != $user['id']) {
            http_response_code(403);
            echo json_encode(['error' => 'Forbidden']);
            return;
        }
        
        // Sync stats before returning
        $client->syncStats();
        
        // Reload data
        $client = new VpnClient($clientId);
        $clientData = $client->getData();
        $stats = $client->getFormattedStats();
        
        echo json_encode([
            'success' => true,
            'client' => [
                'id' => $clientData['id'],
                'name' => $clientData['name'],
                'server_id' => $clientData['server_id'],
                'client_ip' => $clientData['client_ip'],
                'status' => $clientData['status'],
                'created_at' => $clientData['created_at'],
                'stats' => $stats,
                'bytes_sent' => $clientData['bytes_sent'],
                'bytes_received' => $clientData['bytes_received'],
                'last_handshake' => $clientData['last_handshake'],
            ]
        ]);
    } catch (Exception $e) {
        http_response_code(404);
        echo json_encode(['error' => 'Client not found']);
    }
});

// API: Revoke client
Router::post('/api/clients/{id}/revoke', function ($params) {
    header('Content-Type: application/json');
    
    $user = JWT::requireAuth();
    if (!$user) return;
    
    $clientId = (int)$params['id'];
    
    try {
        $client = new VpnClient($clientId);
        $clientData = $client->getData();
        
        // Check ownership
        if ($clientData['user_id'] != $user['id']) {
            http_response_code(403);
            echo json_encode(['error' => 'Forbidden']);
            return;
        }
        
        if ($client->revoke()) {
            echo json_encode(['success' => true, 'message' => 'Client revoked']);
        } else {
            http_response_code(500);
            echo json_encode(['error' => 'Failed to revoke client']);
        }
    } catch (Exception $e) {
        http_response_code(500);
        echo json_encode(['error' => $e->getMessage()]);
    }
});

// API: Restore client
Router::post('/api/clients/{id}/restore', function ($params) {
    header('Content-Type: application/json');
    
    $user = JWT::requireAuth();
    if (!$user) return;
    
    $clientId = (int)$params['id'];
    
    try {
        $client = new VpnClient($clientId);
        $clientData = $client->getData();
        
        // Check ownership
        if ($clientData['user_id'] != $user['id']) {
            http_response_code(403);
            echo json_encode(['error' => 'Forbidden']);
            return;
        }
        
        if ($client->restore()) {
            echo json_encode(['success' => true, 'message' => 'Client restored']);
        } else {
            http_response_code(500);
            echo json_encode(['error' => 'Failed to restore client']);
        }
    } catch (Exception $e) {
        http_response_code(500);
        echo json_encode(['error' => $e->getMessage()]);
    }
});

// API: Get server clients
Router::get('/api/servers/{id}/clients', function ($params) {
    header('Content-Type: application/json');
    
    $user = JWT::requireAuth();
    if (!$user) return;
    
    $serverId = (int)$params['id'];
    
    try {
        $server = new VpnServer($serverId);
        $serverData = $server->getData();
        
        // Check ownership
        $user = Auth::user();
        if ($serverData['user_id'] != $user['id'] && !Auth::isAdmin()) {
            http_response_code(403);
            echo json_encode(['error' => 'Forbidden']);
            return;
        }
        
        // Sync all stats first
        VpnClient::syncAllStatsForServer($serverId);
        
        $clients = VpnClient::listByServer($serverId);
        $clientsData = [];
        
        foreach ($clients as $clientData) {
            $client = new VpnClient($clientData['id']);
            $stats = $client->getFormattedStats();
            
            $clientsData[] = [
                'id' => $clientData['id'],
                'name' => $clientData['name'],
                'client_ip' => $clientData['client_ip'],
                'status' => $clientData['status'],
                'created_at' => $clientData['created_at'],
                'stats' => $stats,
                'bytes_sent' => $clientData['bytes_sent'],
                'bytes_received' => $clientData['bytes_received'],
                'last_handshake' => $clientData['last_handshake'],
            ];
        }
        
        echo json_encode(['success' => true, 'clients' => $clientsData]);
    } catch (Exception $e) {
        http_response_code(500);
        echo json_encode(['error' => $e->getMessage()]);
    }
});

// API: Create client
Router::post('/api/clients/create', function () {
    header('Content-Type: application/json');
    
    $user = JWT::requireAuth();
    if (!$user) return;
    
    $raw = file_get_contents('php://input');
    $data = json_decode($raw, true);
    
    $serverId = (int)($data['server_id'] ?? 0);
    $name = trim($data['name'] ?? '');
    
    if ($serverId <= 0 || empty($name)) {
        http_response_code(400);
        echo json_encode(['error' => 'server_id and name are required']);
        return;
    }
    
    try {
        $clientId = VpnClient::create($serverId, $user['id'], $name);
        
        $client = new VpnClient($clientId);
        $clientData = $client->getData();
        
        echo json_encode(['client' => $clientData]);
    } catch (Exception $e) {
        http_response_code(500);
        echo json_encode(['error' => $e->getMessage()]);
    }
});

/**
 * SETTINGS ROUTES
 */

// Settings page
Router::get('/settings', function () {
    requireAuth();
    
    require_once __DIR__ . '/../controllers/SettingsController.php';
    $controller = new SettingsController();
    $controller->index();
});

// Save API key
Router::post('/settings/api-key', function () {
    requireAdmin();
    
    require_once __DIR__ . '/../controllers/SettingsController.php';
    $controller = new SettingsController();
    $controller->saveApiKey();
});

// Change password
Router::post('/settings/change-password', function () {
    requireAuth();
    
    require_once __DIR__ . '/../controllers/SettingsController.php';
    $controller = new SettingsController();
    $controller->changePassword();
});

// Add user
Router::post('/settings/add-user', function () {
    requireAdmin();
    
    require_once __DIR__ . '/../controllers/SettingsController.php';
    $controller = new SettingsController();
    $controller->addUser();
});

// Delete user
Router::post('/settings/delete-user/{id}', function ($params) {
    requireAdmin();
    
    require_once __DIR__ . '/../controllers/SettingsController.php';
    $controller = new SettingsController();
    $controller->deleteUser($params['id']);
});

/**
 * LANGUAGE ROUTES
 */

// Change language
Router::post('/language/change', function () {
    $lang = $_POST['language'] ?? '';
    
    if (Translator::setLanguage($lang)) {
        $_SESSION['success'] = 'Language changed successfully';
    } else {
        $_SESSION['error'] = 'Invalid language';
    }
    
    $redirect = $_POST['redirect'] ?? '/dashboard';
    redirect($redirect);
});

Router::get('/language/change', function () {
    redirect('/dashboard');
});

// API: Get translation statistics
Router::get('/api/translations/stats', function () {
    header('Content-Type: application/json');
    
    $user = JWT::requireAuth();
    if (!$user) return;
    
    $stats = Translator::getStatistics();
    echo json_encode(['stats' => $stats]);
});

// API: Auto-translate missing keys
Router::post('/api/translations/auto-translate', function () {
    header('Content-Type: application/json');
    
    $user = JWT::requireAuth();
    if (!$user) return;
    
    $raw = file_get_contents('php://input');
    $data = json_decode($raw, true);
    
    $targetLang = $data['language'] ?? '';
    
    if (empty($targetLang)) {
        http_response_code(400);
        echo json_encode(['error' => 'Language is required']);
        return;
    }
    
    try {
        $stats = Translator::translateMissingKeys($targetLang);
        echo json_encode([
            'success' => true,
            'stats' => $stats
        ]);
    } catch (Exception $e) {
        http_response_code(500);
        echo json_encode(['error' => $e->getMessage()]);
    }
});

// API: Export translations
Router::get('/api/translations/export/{lang}', function ($params) {
    header('Content-Type: application/json');
    
    $user = JWT::requireAuth();
    if (!$user) return;
    
    $lang = $params['lang'];
    
    try {
        $json = Translator::exportToJson($lang);
        header('Content-Disposition: attachment; filename="translations_' . $lang . '.json"');
        echo $json;
    } catch (Exception $e) {
        http_response_code(500);
        echo json_encode(['error' => $e->getMessage()]);
    }
});

// Dispatch router
Router::dispatch($_SERVER['REQUEST_METHOD'], $_SERVER['REQUEST_URI']);