calculateProduct example

$displayFromPrice = $product->displayFromPrice();
            } else {
                $cheapestPriceRule = $cheapestPriceData[$number]['price'];
                $displayFromPrice = $cheapestPriceData[$number]['different_price_count'] > 1;
            }

            if ($product->isPriceGroupActive()) {
                $cheapestPriceRule = $this->calculatePriceGroupDiscounts($product, $cheapestPriceRule, $context);
            }

            $product->setCheapestPriceRule($cheapestPriceRule);
            $this->priceCalculationService->calculateProduct($product, $context);

            $product->setListingPrice($product->getCheapestUnitPrice());
            if ($this->config->get('calculateCheapestPriceWithMinPurchase') && $product->getCheapestPrice() instanceof Price) {
                $product->setListingPrice($product->getCheapestPrice());
            }

            $product->setDisplayFromPrice($displayFromPrice);
        }
    }

    private function calculatePriceGroupDiscounts(ListProduct $product, PriceRule $price, ShopContextInterface $context): PriceRule
    {

if (isset($categories[$number])) {
                $product->setCategories($categories[$number]);
            }

            if ($product->getManufacturer() && isset($manufacturerCovers[$product->getManufacturer()->getCoverId()])) {
                $product->getManufacturer()->setCoverMedia($manufacturerCovers[$product->getManufacturer()->getCoverId()]);
            }

            $product->addAttribute('marketing', $this->marketingService->getProductAttribute($product));

            $this->priceCalculationService->calculateProduct($product, $context);

            if (!$this->isProductValid($product, $context)) {
                continue;
            }

            $product->setListingPrice($product->getCheapestUnitPrice());
            $product->setDisplayFromPrice(\count($product->getPrices()) > 1 || $product->hasDifferentPrices());
            $product->setAllowBuyInListing($this->allowBuyInListing($product));
            if ($this->config->get('calculateCheapestPriceWithMinPurchase') && $product->getCheapestPrice() instanceof Price) {
                $product->setListingPrice($product->getCheapestPrice());
            }
            

foreach ($contexts as $context) {
                $customerGroup = $context->getCurrentCustomerGroup()->getKey();
                $key = $customerGroup . '_' . $context->getCurrency()->getId();

                $rule = $rules[$context->getFallbackCustomerGroup()->getKey()] ?? null;
                if (isset($rules[$customerGroup])) {
                    $rule = $rules[$customerGroup];
                }

                $product->setCheapestPriceRule($rule);

                $this->priceCalculationService->calculateProduct($product, $context);

                $priceObj = $product->getCheapestUnitPrice();

                if ($this->config->get('calculateCheapestPriceWithMinPurchase')) {
                    $priceObj = $product->getCheapestPrice();
                }

                if ($priceObj) {
                    $priceObj->setRule(null);

                    $prices[$number][$key] = $priceObj;
                }