<?php

namespace core;

abstract class Controller{

    public $pageLayout = '/layout/main';
    public $pageTitle = '';
    public $pageMeta = [];
    public $pageParam = [];

    public function run($action, $params){
        $vars = [];
        $ref = new \ReflectionMethod($this, $action);
        foreach($ref->getParameters() as $param){
            $name=$param->getName();
            if(isset($params[$name]))
            {
                if($param->isArray())
                    $vars[]=is_array($params[$name]) ? $params[$name] : array($params[$name]);
                elseif(!is_array($params[$name]))
                    $vars[]=$params[$name];
            }
            elseif($param->isDefaultValueAvailable())
                $vars[]=$param->getDefaultValue();
        }
        call_user_func_array([$this, $action], $vars);
    }

    public function render($file, $vars = null, $return = false){
        $content = $this->renderPartial($file, $vars, true);
        $this->renderPartial($this->pageLayout, ['content'=>$content]);
    }

    private $_viewFolder;
    public function renderPartial($file, $vars = null, $return = false){
        if(str_start($file, '/')){
            // Если указана папка то запоминаем её
            $a = explode('/', trim($file, '/'));
            $oldfolder = $this->_viewFolder;
            $this->_viewFolder = $a[0];
            $file = DIR_VIEWS.$file.'.php';
            $output = $this->renderInternal($file, $vars, $return);
            $this->_viewFolder = $oldfolder;
        }else{
            if(!$this->_viewFolder){
                // По умолчанию папка по имени контролера
                $class = get_called_class();
                $this->_viewFolder = strtolower(substr($class, 11, strlen($class) - 21));
            }
            $file = $this->_viewFolder.'/'.$file;
            $file = DIR_VIEWS.$file.'.php';
            $output = $this->renderInternal($file, $vars, $return);
        }
        return $output;
    }

    private function renderInternal($_file, $_vars = null, $_return = false){
        if(is_array($_vars) && !empty($_vars))
            extract($_vars);
        extract(['this' => $this]);
        if($_return){
            ob_start();
            ob_implicit_flush(false);
            require($_file);
            return ob_get_clean();
        }else{
            require($_file);
            return true;
        }
    }

    public function renderJson($data = []){
        header('Content-Type: application/json');
        echo json_encode($data);
        $this->end();
    }

    public function renderJsonError($err_code, $msg = '', $data = []){
        header('Content-Type: application/json');
        header($_SERVER['SERVER_PROTOCOL'].' '.$err_code.' '.$msg, true, $err_code);
        echo json_encode($data);
        $this->end();
    }

    public function redirect($url){
        header('Location: '.$url);
        $this->end();
    }

    public function end(){
        App::instance()->end();
    }

}