<?php

namespace App;

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Loader\Configurator\RouteConfigurator;
use Symfony\Component\Routing\Matcher\UrlMatcher;
use Symfony\Component\Routing\RequestContext;
use Symfony\Component\Routing\RouteCollection;

class Router
{
  use Singleton;
  
  private RouteCollection $routes;
  private RouteConfigurator $configurator;
  
  public function __construct()
  {
    $this->routes = new RouteCollection();
    $this->configurator = new RouteConfigurator($this->routes, $this->routes);
    
    $this->addRoutes();
  }
  
  public function run(): Response
  {
    $request = Request::createFromGlobals();
    
    $context = new RequestContext();
    $context->fromRequest($request);
    
    try {
      $matcher = new UrlMatcher($this->routes, $context);
      $match = $matcher->matchRequest($request);
      
      $class = $match["_controller"][0];
      $method = $match["_controller"][1];
      
      return (new $class)->$method();
    } catch (\Exception $exception) {
      return new Response("500: " . $exception->getMessage(), 500);
    }
  }
  
  private function addRoutes(): void
  {
    $routes = include_once(__DIR__ . "/routes.php");
    $routes($this->configurator);
  }
}