<?php
 
//if(!defined('DOKU_INC')) die();


//~ abstract class BEZ_mdl_Dummy_Entity {
    
    //~ protected $model;
    
    //~ protected $id = NULL;
    
    //~ public function __get($property) {
		//~ if ($property === 'id') {
            //~ return $this->id;
        //~ }
	//~ }
    
    //~ public function get_table_singular() {
        //~ $class = get_class($this);
		//~ $exp = explode('_', $class);
		//~ $singular = array_pop($exp);
		//~ return lcfirst($singular);
    //~ }
    
    //~ public function get_table_name() {
		//~ $singlar = $this->get_table_singular();
		//~ return $singular.'s';
	//~ }
    
    //~ public function acl_of($field) {
        //~ return $this->model->acl->check_field($this, $field);
    //~ }
    
    //~ public function __construct($model) {
		//~ $this->model = $model;
	//~ }
//~ }

namespace dokuwiki\plugin\bez\mdl;
/*
 * All fields are stored in object as strings.
 * NULLs are converted to empty string.
 * If any attribute in object === NULL -> it means that it was not initialized 
 * But we always inserts NULLs instead of empty strings.
 * https://stackoverflow.com/questions/1267999/mysql-better-to-insert-null-or-empty-string 
 **/

use dokuwiki\plugin\bez\meta\PermissionDeniedException;

abstract class Entity {// extends BEZ_mdl_Dummy_Entity {

    /** @var  Model */
    protected $model;

    /** @var Validator */
    protected $validator;
    
    //protected $columns_demendencies = array();
	
	//protected $parse_int = array();
    
	abstract public static function get_columns();

//    abstract public static function get_virtual_columns();
    
//    private function is_dummy() {
//        if (strstr(get_class(), 'Dummy') === false) {
//            return false;
//        }
//        return true;
//    }
//
//    private function not_for_dummies() {
//        if ($this->is_dummy()) {
//            throw new Exception('dummy object doesn\'t contains data.');
//        }
//    }
	
	public function get_assoc($filter=NULL) {
        //$this->not_for_dummies();
        
		$assoc = array();
		//$columns = array_merge($this->get_columns(), $this->get_virtual_columns());

        $columns = $this->get_columns();
        if ($filter !== NULL) {
            $columns = array_intersect($columns, $filter);
        }
        
		foreach ($columns as $col) {
			$assoc[$col] = $this->$col;
		}
		return $assoc;
	}
    
//    public function get_table_singular() {
//        $class = get_class($this);
//		$exp = explode('_', $class);
//		$singular = array_pop($exp);
//		return lcfirst($singular);
//    }
//
    public function get_table_name() {
        $class = (new \ReflectionClass($this))->getShortName();
		return lcfirst($class);
	}
    
//    private function create_DateTime_from_column($column) {
//        $cols = array_merge($this->get_columns(), $this->get_virtual_columns());
//        if (!in_array($column, $cols)) {
//            throw new Exception("$column is not a column");
//        }
//        $dt = $this->$column;
//        if (is_numeric($dt)) {
//            return new DateTime('@'.$dt);
//        }
//        return new DateTime($dt);
//    }
//
//    public function date_format($column) {
//        $date = $this->create_DateTime_from_column($column);
//
//        return $date->format('Y-m-d');
//    }
//
//    public function datetime_format($column, $format='comment') {
//        $date = $this->create_DateTime_from_column($column);;
//
//        if ($format === 'comment') {
//            return $dt->format('j') . ' ' .
//                    $this->model->action->getLang('mon'.$dt->format('n').'_a') . ' ' .
//                    ($dt->format('Y') === date('Y') ? '' : $dt->format('Y') . ' ') .
//                    $this->model->action->getLang('at_hour') . ' ' .
//                    $dt->format('G:i');
//        }
//    }
//
//    public function days_ago($column, $first_date = null) {
//        if ($first_date === null) {
//            $first_date = new DateTime();
//        } elseif (is_string($first_date)) {
//            $first_date = $this->create_DateTime_from_column($first_date);
//        }
//        $interval = $first_date->diff($this->create_DateTime_from_column($column));
//        $sign = $interval->format('%R');
//        $days = $interval->format('%a');
//        if ($sign === '-') {
//            return $days . ' ' . $this->model->action->getLang('days') . ' ' .
//                    $this->model->action->getLang('ago');
//        }
//        return $days . ' ' . $this->model->action->getLang('days');
//
//    }
//
//    public function float_localized($column) {
//        $cols = array_merge($this->get_columns(), $this->get_virtual_columns());
//        if (!in_array($column, $cols)) {
//            throw new Exception("$column is not a column");
//        }
//        if ($this->$column === '') {
//            return '';
//        }
//
//        if (!is_numeric($this->$column)) {
//            throw new Exception('Column ' . $column . ' isn\'t numeric');
//        }
//
//        return sprintf('%.2f', $this->$column);
//    }
    
    //set id when object is saved in database
//    public function set_id($id) {
////        $this->not_for_dummies();
//
//        if ($this->id === NULL) {
//            $this->id = $id;
//        } else {
//            throw new \Exception('id already set for issue #'.$this->id);
//        }
//    }
	
//	public function sqlite_date($time=NULL) {
//		//SQLITE format: https://www.sqlite.org/lang_datefunc.html
//		if ($time === NULL) {
//			return date('Y-m-d H:i:s');
//		} else {
//			return date('Y-m-d H:i:s', $time);
//		}
//	}
	
	public function __get($property) {
//        $this->not_for_dummies();
         
//		$columns = array_merge($this->get_columns(), $this->get_virtual_columns());
        if (!property_exists($this, $property) || !in_array($property, $this->get_columns())) {
            throw new \Exception('there is no column: "'.$property. '"" in table: "' . $this->get_table_name() . '"');
        }
        
        //now only normal db columns has ACL, it should be fixed        
        if ($this->acl_of($property) < BEZ_PERMISSION_VIEW) {
            throw new PermissionDeniedException();
        }

        return $this->$property;
        
//		if (property_exists($this, $property) && in_array($property, $this->get_columns())) {
////			if (in_array($property, $this->parse_int)) {
////				return (int)$this->$property;
////			} else {
//				return $this->$property;
////			}
//		}
	}
    
    protected function set_property($property, $value) {
//        $this->not_for_dummies();
         
        if (!in_array($property, $this->get_columns())) {
            throw new \Exception('trying to set not existing column');
        }
        
        //throws ValidationException
        $this->validator->validate_field($property, $value);
        
        //throws PermissionDeniedException
        $this->model->acl->can_change($this, $property);
        
        $this->$property = $value;
        
//        if (isset($this->columns_demendencies[$property])) {
//            $method = $this->columns_demendencies[$property];
//            //convention -> run the method with the same name as $property
//            if (!method_exists($this, $method)) {
//                throw new Exception("denepndency method: $property not implemented");
//            }
//            $this->$method();
//        }
    }
    
    protected function set_property_array($array) {
        foreach ($array as $k => $v) {
            $this->set_property($k, $v);
        }
    }
    
    //by default do nothing
//    private function update_virtual_columns() {
//    }
//

    public function set_data($post) {
//        $input = array_intersect($this->changable_fields($filter), array_keys($post), array_keys($this->validator->get_rules()));
       
        $val_data = $this->validator->validate($post);
		if ($val_data === false) {
			throw new ValidationException($this->get_table_name(), $this->validator->get_errors());
		}

		$this->set_property_array($val_data);
        
//        $this->update_virtual_columns();
    }
    
//    public function changable_fields($filter=NULL) {
//       $fields = $this->model->acl->check($this);
//
//       if ($filter !== NULL) {
//           $fields = array_filter($fields, function ($k) use ($filter) {
//                return in_array($k, $filter);
//           }, ARRAY_FILTER_USE_KEY);
//       }
//
//       return array_keys(array_filter($fields, function ($var) {
//           return $var >= BEZ_PERMISSION_CHANGE;
//       }));
//    }
    
    public function acl_of($field) {
        return $this->model->acl->check_field($this, $field);
    }
        
    public function __construct($model) {
        //by convention all defaults must be strings
//        foreach ($defaults as $val) {
//            if (!is_string($val)) {
//                throw new Exception('all defaults must be strings');
//            }
//        }
//		$this->model = $model;
//
//        if (!$this->is_dummy()) {
//            $this->validator = new BEZ_mdl_Validator($this->model);
//        }
		//$this->helper = plugin_load('helper', 'bez');

        $this->model = $model;
        $this->validator = new Validator($this->model);
	}
}