<?php

declare(strict_types=1);

namespace App\Core;

final class Router
{
    /**
     * @var array<int, array{method: string, pattern: string, handler: callable}>
     */
    private array $routes = [];

    public function get(string $pattern, callable $handler): void
    {
        $this->routes[] = ['method' => 'GET', 'pattern' => $pattern, 'handler' => $handler];
    }

    public function dispatch(string $method, string $uri): void
    {
        $path = parse_url($uri, PHP_URL_PATH) ?: '/';
        $path = rtrim($path, '/') ?: '/';

        foreach ($this->routes as $route) {
            if ($route['method'] !== $method) {
                continue;
            }

            $params = $this->match($route['pattern'], $path);

            if ($params === null) {
                continue;
            }

            ($route['handler'])(...$params);
            return;
        }

        http_response_code(404);
        view('pages/404', [
            'title' => 'Страница не найдена - Рыбсток',
            'breadcrumbs' => [
                ['title' => 'Главная', 'url' => '/'],
                ['title' => 'Страница не найдена'],
            ],
        ]);
    }

    /**
     * @return array<int, string>|null
     */
    private function match(string $pattern, string $path): ?array
    {
        $regex = preg_replace('#\{([a-zA-Z_][a-zA-Z0-9_]*)\}#', '([^/]+)', $pattern);
        $regex = '#^' . rtrim((string) $regex, '/') . '$#u';

        if ($pattern === '/') {
            $regex = '#^/$#u';
        }

        if (!preg_match($regex, $path, $matches)) {
            return null;
        }

        array_shift($matches);

        return array_map('urldecode', $matches);
    }
}