<?php

declare(strict_types=1);

namespace KupShop\KupShopBundle\DiscountFieldDefinition;

/**
 * Wraps `DiscountFieldDefinitionInterface` and checks if real discount is set. When real discount is not set, no discount is displayed.
 *
 * @property AbstractDiscountFieldDefinition $fallback
 */
class ExplicitDiscountFieldDefinition extends AbstractDiscountFieldDefinition
{
    public function __construct(DiscountFieldDefinitionInterface $fallback)
    {
        $this->setFallback($fallback);
    }

    public function getField(): string
    {
        // discount must be explicitly defined on the product to be displayed
        return "IF({$this->fallback->getColumn()}>0, {$this->fallback->getField()}, 0)";
    }

    public function getSpec(): callable
    {
        return $this->fallback->getSpec();
    }
}