<?php
//Main app
// asol routing eikhanei hobe


class App
{
    /********************************
    * url theke option gula vag hobe
    * projoniyo controller class e zabe
    * tar nirdisto method access korbe
    * method e params load hobe
    * e.g site/a/b/c
    * site/controller/method/params
    *********************************/

    // default controller and method
    protected $controller = 'home';
    protected $method = 'main';
    protected $params = array(); // empty array needed if no params

   /*********************************
   *** Construction
   **********************************/
    function __construct()
    {
        /****url ke vag kora shuru
        * store in $url
        ***************************/
        $url = $this->parseUrl();


        /*****************************************
        ** Checking options and calling controller
        ******************************************/
        if(!empty($url[0]) && ($url[0] != 'index.php'))
        {
                /******** controller ******/
            if(file_exists('../controller/'.$url[0].'.php'))
            {
                //controller found
                $this->controller = $url[0];
                unset($url[0]);

                //creating controller object
                require_once '../controller/'. $this->controller .'.php';
                $controller = new $this->controller;

                /******** Methods ***********/
                //checking methods
                if(!empty($url[1]))
                {
                    if(method_exists( $controller, $url[1] ))
                    {   //method found
                        $this->method = $url[1];
                        unset($url[1]);

                        /******** params ***********/
                        //checking params
                        if(!empty($url))
                            {   //params exists
                                $this->params = array_values($url);
                                echo "<br>params: ";
                                print "<pre>";
                                print_r($this->params);
                                print "</pre>";
                            }
                            else //
                                {
                                    echo "<br>no params";
                                }

                        $controller->{$this->method}();

                    }
                    else
                        {  //method not exists
                            $this->method = "methodNotExists";
                            require_once '../controller/errornf.php';
                            $controller = new ErrorNF();
                            $controller->{$this->method}();
                            exit();
                        }
                }
                else // method option not exists
                     {
                        $controller->{$this->method}();
                        exit();
                     }
            }
            else //No controller exists Error
                {
                    require_once '../controller/errornf.php';
                    $controller = new ErrorNF();
                    $controller->{$this->method}();
                    exit();
                }


        }
        else // No url , go default
            {
                include_once '../controller/'. $this->controller .'.php';
                $controller = new $this->controller;
                $controller->{$this->method}();
                exit();
            }



    } //end of __construct

    /**************************
    * Done with construct
    * finding options
    ****************************/
    public function parseUrl()
    {

        if(isset($_GET['url']))
            return $url = explode(
                                  '/',
                                  filter_var(
                                             rtrim( $_GET['url'], '/'),
                                             FILTER_SANITIZE_URL
                                            )
                                 );
    }


} //end of class