<?php

namespace elanpl\L3;

class Application{

    public $config; // L3 Config object

    public $request; // build from received HTTP request or created in L3 Config object

    public $response; // response to be send

    public $router; // routing engine

    public $serialization; // serialization engine

    public $viewEngines; // view engines configuration

    public $baseDirectory; // directory root of the application

    public $controllersDirectory; // subdirectory/namespace part added to controller class 

    public $viewsDirectory; // subdirectory to search for the view files

    public $applicationDirectory; // subdirectory/namespace part of the application

    public $controller; //Active controller

    public $module; //Active module

    public $action; //Active action

    public function __construct($config){

        //set L3 application config

        $this->config = $config;

        // directory root of the application

        $this->baseDirectory = $config->getBaseDirectory();

        // subdirectory/namespace part added to controller class

        $this->controllersDirectory = $config->getControllersDirectory();

        // subdirectory to search for the view files 

        $this->viewsDirectory = $config->getViewsDirectory();

        // subdirectory/namespace part of the application

        $this->applicationDirectory = $config->getApplicationDirectory();

        //create request object

        $this->request = $this->config->getRequest();

        //create router object

        $this->router = new Router($this->config->getRouting());

        //create response objcet

        $this->response = new Response();

        //create serialization object

        $this->serialization = new Serialization(); 

        //create view engines configuretion object

        $this->viewEngines = new ViewEngine();

        //perform configuration operations

        $this->config->configure($this);

    }

    public function basePath(){

        return strstr($_SERVER['REQUEST_URI'], $this->request->path, true);

    }

    public function getServerURL(){

        return (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on' ? "https" : "http") . "://{$_SERVER['HTTP_HOST']}";

    }

    public function getURL(){

        return $this->getServerURL().$_SERVER['REQUEST_URI'];

    }

    public function relPath($file){

        return ($this->router->depth>0 ? str_repeat("../", substr($this->request->path,-1)=='/'?$this->router->depth:$this->router->depth-1) : "" ).$file; 

    }

    public function link($name, $parameters){

        return $this->router->link($name, $parameters);

    }

    /*

    //not need - PSR-4 autoload handles that

    function IncludeControler($Controller){

        include_once(_L3_CONTROLLER_PATH.$Controller.'.php');

    }*/

    public function findControllerInCallStack($search_level=5){

        //search for controller, action and module if present

        $controller = "";

        $module = "";

        $action = "";

        $match = array();

        //analize the call stack

          $call_stack = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, $search_level);

        for($i=0; $i<$search_level; $i++){

            if(preg_match(

                    $pattern = '#('.$this->applicationDirectory.')(\\\\(?P<module>.+))?\\\\'.$this->controllersDirectory.'\\\\(?P<controller>.+)#',

                    $call_stack[$i]['class'],

                    $match

                )

            ){

                $action = $call_stack[$i]['function'];

                $module = $match['module'];

                $controller = $match['controller'];

                break;

            }

        }

        return array(

            'module' => $module,

            'controller' => $controller,

            'action' => $action

        );

    }