<?php

declare(strict_types=1);

namespace External\HannahBundle\Util\Purchase;

use KupShop\KupShopBundle\Context\CurrencyContext;
use KupShop\KupShopBundle\Util\Contexts;
use KupShop\KupShopBundle\Util\Price\TotalPrice;

class PurchaseUtil extends \KupShop\OrderingBundle\Util\Purchase\PurchaseUtil
{
    public function getPurchaseStateSavings(): TotalPrice
    {
        // ceneni kosiku pres SAP je povoleno pouze pro CZK menu
        if (Contexts::get(CurrencyContext::class)->getActiveId() !== 'CZK') {
            return parent::getPurchaseStateSavings();
        }

        $savingsWithVat = \DecimalConstants::zero();
        $savingsWithoutVat = \DecimalConstants::zero();

        foreach ($this->getPurchaseState()->getProducts() as $item) {
            if (!$item->getProduct() || !$item->getProduct()->getProductPrice()) {
                continue;
            }

            $productPrice = $item->getProduct()->getProductPrice();

            if (!($priceCommon = $item->getNote()['sap']['priceCommon'] ?? null)) {
                $priceCommon = $productPrice->getPriceWithVatWithoutDiscount()->mul(toDecimal($item->getPieces()));
            }

            // make sure priceCommon is decimal
            $priceCommon = toDecimal($priceCommon);

            if ($priceCommon->isPositive()) {
                $diffWithVat = $priceCommon->sub($item->getPrice()->getPriceWithVat());
                if ($diffWithVat->isPositive()) {
                    $savingsWithVat = $savingsWithVat->add($diffWithVat);
                }

                $diffWithoutVat = $priceCommon->removeVat($item->getPrice()->getVat())->sub($item->getPrice()->getPriceWithoutVat());
                if ($diffWithoutVat->isPositive()) {
                    $savingsWithoutVat = $savingsWithoutVat->add($diffWithoutVat);
                }
            }
        }

        return new TotalPrice(
            $savingsWithVat,
            $savingsWithoutVat,
            $this->currencyContext->getActive()
        );
    }
}