<?php

namespace App\Backend;

use App\Entities\OrderEntity;
use App\Entities\ProductEntity;
use App\Models\OrderModel;
use App\Models\ProductModel;

class OrderBackend extends BaseBackend
{
    private $_productModel = null;
    private $_product_uids = array();
    public function __construct()
    {
        parent::__construct('Order');
        $this->_model = new OrderModel();
    }

    //Porduct모델
    final public function getProductModel(): ProductModel
    {
        return is_null($this->_productModel) ? new ProductModel() : $this->_productModel;
    }

    //Field별 Form Option용
    public function getFieldFormOption(string $field): array
    {
        switch ($field) {
            case 'product_uid':
                $options = $this->_product_uids = $this->_product_uids ?: $this->getProductModel()->getFieldFormOptions([]);
                break;
            default:
                return parent::getFieldFormOption($field);
                break;
        }
        if (!is_array($options)) {
            throw new \Exception(__FUNCTION__ . "에서 {$this->getClassName()}의 Field:{$field}의 FormOptionData가 array가 아닙니다.\n" . var_export($options, true));
        }
        return $options;
    }

    //장바구니에 담기 및 Product 재고 차감
    public function addCart(ProductEntity $product, int $quantity, int $price): OrderEntity
    {
        return $this->_model->addCart($product, $quantity, $price);
    }
}