<?php
class Router {
    protected $controller = 'HomeController';
    protected $method = 'index';
    protected $params = [];
    // Main Routing Logic
    public function route() {
        $url = $this->parseUrl();
        $controllerPath = __DIR__ . '/../app/controllers/';
        // Controller Check
        if (isset($url[0]) && file_exists($controllerPath . ucfirst($url[0]) . 'Controller.php')) {
            $this->controller = ucfirst($url[0]) . 'Controller';
            unset($url[0]);
        }
        require_once $controllerPath . $this->controller . '.php';
        $this->controller = new $this->controller;
        // Method Check
        if (isset($url[1])) {
            if (method_exists($this->controller, $url[1])) {
                $this->method = $url[1];
                unset($url[1]);
            }
        }
        // Params & Execution
        $this->params = $url ? array_values($url) : [];
        call_user_func_array([$this->controller, $this->method], $this->params);
    }
    // URL Parser
    private function parseUrl() {
        if (isset($_GET['url'])) {
            return explode('/', filter_var(rtrim($_GET['url'], '/'), FILTER_SANITIZE_URL));
        }
        return [];
    }
}