<?php
class Application
{
    private $url_controller = null;
    private $url_action = null;
    private $url_parameters = array();

    public function __construct()
    {
        $this->splitUrl();

		if (!isset($_SESSION["username"]) and $this->url_controller!="login") {
			require './application/controllers/login.php';
			$login = new Login();
			$login->index($_GET['url']);
			exit;
		}
		
		if (file_exists('./application/controllers/' . $this->url_controller . '.php')) {
			require './application/controllers/' . $this->url_controller . '.php';

			$this->url_controller = new $this->url_controller();

			if (method_exists($this->url_controller, $this->url_action)) {
				if (count($this->url_parameters)>0) {
					call_user_func_array(array($this->url_controller, $this->url_action), $this->url_parameters);
				} else {
					$this->url_controller->{$this->url_action}();
				}
            } else {
                $this->url_controller->index();
            }
        } else {
            // invalid URL, so simply show page
			require './application/controllers/reports.php';
            $reports = new Reports();
            $reports->index();
        }
    }

    /**
     * Get and split the URL
     */
    private function splitUrl()
    {
		if (isset($_GET['url'])) {
            // split URL
            $url = rtrim($_GET['url'], '/');
            $url = filter_var($url, FILTER_SANITIZE_URL);
            $url = explode('/', $url);

            $this->url_controller = (isset($url[0]) ? $url[0] : null);
            $this->url_action = (isset($url[1]) ? $url[1] : null);

			if (count($url)>2) {
				for ($i=2; $i<count($url); ++$i) {
					$this->url_parameters[$i-1] = $url[$i];
				}
			}
        }
    }
}