<?php

class StaticRouter
{
	public static $routes = [];

	public static function add(string $method, string $route, callable $handler): void
	{
		$segments = array_map(function($segment) {
			return str_starts_with($segment, ':') ? ':x' : $segment;
		}, explode('/', trim($route, '/')));

		$node = &self::$routes;
		foreach ($segments as $segment) {
			if ($segment === '') continue;
			$node = &$node[$segment];
		}

		$node[$method] = $handler;
	}

	public static function lookup(array $node /* = &$this->routes */, string $method, string $uri): int|array
    {
        $uriSegments = explode('/', trim($uri, '/'));
        $params = [];

        if (isset($node[$method])) return [$node[$method], $params];

        if (! $node2 = array_reduce($uriSegments, function ($carry, $segment) use (&$params) {
            if (isset($carry[$segment])) return $carry[$segment];
            if (isset($carry[':x'])) {
                $params[] = $segment;
                return $carry[':x'];
            }
            return null;
        }, $node)) return 404;

        if (isset($node2[$method])) return [$node2[$method], $params];

        return 405;
    }
}