<?php
namespace Blog\Core;

use Blog\Middleware\middlewareInterface;
use Blog\Http\request;
use Blog\Http\response;

class Router {
  private array $routes = [];

  public function addRoute(string $method, string $path, callable $handler, array $middlewares = []): void {
    $path = preg_replace('/{(\w+)}/', '(?P<$1>[^/]+)', $path);
    $this->routes[] = compact("method", "path", "handler", "middlewares");
  }

  public function dispatch(Request $req, Response $res): void {
    $method = $req->getMethod();
    $uri = $req->getPath();

    foreach($this->routes as $route) {
      if($route['method'] === $method && preg_match("~^" . $route['path'] . "$~", $uri, $matches)) {
        array_shift($matches);
        $params = array_filter($matches, 'is_string', ARRAY_FILTER_USE_KEY);
        if(!$this->handleMiddlewares($route['middlewares'], $req, $res))
          return;
        call_user_func_array($route['handler'], array_merge([ $req, $res ], $params));
        $res->send();
        return;
      }
    }

    $res
      ->setStatus(404)
      ->getBody()
      ->write("404 - Not Found")
      ->send();
  }

  private function handleMiddlewares(array $middlewares, Request $req, Response $res): bool {
    foreach($middlewares as $middleware) {
      $middlewareInstance = is_string($middleware) ? new $middleware() : $middleware;
      if($middlewareInstance instanceof MiddlewareInterface)
        if(!$middlewareInstance->handle($req, $res))
          return false;
    }
    return true;
  }
}