<?php

namespace App\Service;


use App\Entity\Route;
use Closure;

class Router
{
    private array $routes;

    /*
     * This method takes a route like /admin/users/{user} and create a regex to match on call
     */
    function addRoute(string $name, string $route, Closure $callback): void
    {
        // check for parameters
        preg_match_all(pattern: "/(?<={).+?(?=})/", subject: $route, matches: $matches);
        $parameters = $matches[0];

        // create regex for route:
        $regex = preg_replace(pattern: '/(?<={).+?(?=})/', replacement: '(.*?)', subject: $route);
        $regex = str_replace(search: '{', replace: '', subject: $regex);
        $regex = str_replace(search: '}', replace: '', subject: $regex);
        $regex = '/^' . str_replace(search: "/", replace: '\\/', subject: $regex) . '$/i';
        $route = new Route(name: $name, route: $route, regEx: $regex, parameters: $parameters, callback: $callback);

        $this->routes[] = $route;
    }

    public function handleRouting(): void
    {
        $requestUri = $_SERVER['REQUEST_URI'];

        foreach ($this->routes as $route) {
            if (preg_match(pattern:  $route->getRegex(), subject: $requestUri, matches: $matches)) {
                $parameters = [];
                foreach ($route->getParameters() as $id => $parameter) {
                    $parameters[$parameter] = $matches[$id +1];
                }
                call_user_func(callback: $route->getCallback(), args: $parameters);
            }
        }
    }
}