<?php
namespace shop;

class Basket implements \ArrayAccess
{
  public function __construct()
  {

  }

  static public function validate_basket( $basket )
  {
    if ( !is_array( $basket ) )
      return $basket = array();
    else
      return $basket;
  }

  // sprawdzanie czy ilość produktu w koszyku nie jest większa niż stan magazynowy
  public static function check_product_quantity_in_stock( $basket, bool $message = false )
  {
    $result = false;

    foreach ( $basket as $key => $val )
    {
      $permutation = null;

      if ( isset( $val['parent_id'] ) and (int)$val['parent_id'] and isset( $val['product-id'] ) )
        $permutation = \shop\Product::get_product_permutation_hash( (int)$val['product-id'] );

      if ( !$permutation and isset( $val['attributes'] ) and is_array( $val['attributes'] ) and count( $val['attributes'] ) )
        $permutation = implode( '|', $val['attributes'] );

      $quantity_options = \shop\Product::get_product_permutation_quantity_options(
        $val['parent_id'] ? $val['parent_id'] : $val['product-id'],
        $permutation
      );

      if (
        (int)$basket[ $key ][ 'quantity' ] < 1
        and ( (int)$quantity_options['quantity'] > 0 or (int)$quantity_options['stock_0_buy'] === 1 )
      )
      {
        $basket[ $key ][ 'quantity' ] = 1;
        $result = true;
      }

      if ( ( $val[ 'quantity' ] > $quantity_options['quantity'] ) and !$quantity_options['stock_0_buy'] )
      {
        $basket[ $key ][ 'quantity' ] = $quantity_options['quantity'];
        if ( $message )
          \S::error( 'Ilość jednego lub więcej produktów została zmniejszona z powodu niestarczających stanów magazynowych. Sprawdź proszę koszyk.' );
        $result = true;
      }
    }
    \S::set_session( 'basket', $basket );

    return $result;
  }

  public function __get( $variable )
  {
    if ( array_key_exists( $variable, $this -> data ) )
      return $this -> $variable;
  }

  public function __set( $variable, $value )
  {
    $this -> $variable = $value;
  }

  public function offsetExists( $offset )
  {
    return isset( $this -> $offset );
  }

  public function offsetGet( $offset )
  {
    return $this -> $offset;
  }

  public function offsetSet( $offset, $value )
  {
    $this -> $offset = $value;
  }

  public function offsetUnset( $offset )
  {
    unset( $this -> $offset );
  }
}