$router = new Wilaak\Http\RadixRouter();

$router->add('GET', '/:name?', function ($name = 'World') {
    echo "Hello, {$name}!";
});

$method = $_SERVER['REQUEST_METHOD'];
$path   = rawurldecode(strtok($_SERVER['REQUEST_URI'], '?'));

$result = $router->lookup($method, $path);

switch ($result['code']) {
    case 200: // Route found

        // Optionally add headers for OPTIONS requests
        if ($method === 'OPTIONS') {
            $allowedMethods = $router->methods($path);
            header('Allow: ' . implode(',', $allowedMethods));
        }

        $result['handler'](...$result['params']);
        break;

    case 404: // No route found
        http_response_code(404);
        echo '404 Not Found';
        break;

    case 405: // Method not allowed
        $allowedMethods = $result['allowed_methods'];
        header('Allow: ' . implode(',', $allowedMethods));

        // Optionally upgrade OPTIONS requests
        if ($method === 'OPTIONS') {
            http_response_code(204);
            break;
        }

        http_response_code(405);
        echo '405 Method Not Allowed';
        break;
}

// Simple GET route
$router->add('GET', '/about', 'AboutController@show');

// Multiple HTTP methods
$router->add(['GET', 'POST'], '/contact', 'ContactController@submit');

// Any HTTP method
$router->add('*', '/maintenance', 'MaintenanceController@handle');

// Required parameter
$router->add(['GET'], '/users/:id', 'UserController@profile');
// Example requests:
//   /users     -> no match
//   /users/123 -> ['id' => '123']

// Single optional parameter
$router->add(['GET'], '/blog/:slug?', 'BlogController@view');
// Example requests:
//   /blog         -> [] (no parameters)
//   /blog/hello   -> ['slug' => 'hello']

// Chained optional parameters
$router->add(['GET'], '/archive/:year?/:month?', 'ArchiveController@list');
// Example requests:
//   /archive         -> [] (no parameters)
//   /archive/2022    -> ['year' => '2022']
//   /archive/2022/12 -> ['year' => '2022', 'month' => '12']

// Required wildcard parameter (one or more segments)
$router->add(['GET'], '/assets/:resource+', 'AssetController@show');
// Example requests:
//   /assets                -> no match
//   /assets/logo.png       -> ['resource' => 'logo.png']
//   /assets/img/banner.jpg -> ['resource' => 'img/banner.jpg']

// Optional wildcard parameter (zero or more segments)
$router->add(['GET'], '/downloads/:file*', 'DownloadController@show');
// Example requests:
//   /downloads               -> ['file' => ''] (empty string)
//   /downloads/report.pdf    -> ['file' => 'report.pdf']
//   /downloads/docs/guide.md -> ['file' => 'docs/guide.md']

// List all routes
printf("%-8s  %-24s  %s\n", 'METHOD', 'PATTERN', 'HANDLER');
printf("%s\n", str_repeat('-', 60));
$routes = $router->list();
foreach ($routes as $route) {
    printf("%-8s  %-24s  %s\n", $route['method'], $route['pattern'], $route['handler']);
}

// List routes for specific path
printf("%s\n", str_repeat('-', 60));
$filtered = $router->list('/contact');
foreach ($filtered as $route) {
    printf("%-8s  %-24s  %s\n", $route['method'], $route['pattern'], $route['handler']);
}

$cache = __DIR__ . '/radixrouter.cache.php';

if (!file_exists($cache)) {
    $router->add('GET', '/', 'handler');
    // ...add more routes

    $routes = [
        'tree' => $router->tree,
        'static' => $router->static,
    ];

    file_put_contents($cache, '<?php return ' . var_export($routes, true) . ';');
}

$routes = require $cache;
$router->tree   = $routes['tree'];
$router->static = $routes['static'];

// Add custom HTTP methods to the allowedMethods property
$customMethods = ['PURGE', 'REPORT'];
$router->allowedMethods = array_merge($router->allowedMethods, $customMethods);

$router->add('*', '/somewhere', 'handler');

// Will return all methods in allowedMethods
$allowedMethods = $router->methods('/somewhere');