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<?php
/**
 * Copyright (c) 2019 Kaliop Digital Commerce (https://digitalcommerce.kaliop.com) All Rights Reserved.
 * https://opensource.org/licenses/OSL-3.0  Open Software License (OSL 3.0)
 * cnc_catalog_m2
 * <[email protected]>
 */

declare(strict_types=1);

namespace Cnc\Catalog\Plugin\Pricing\Render;

use Magento\Catalog\Api\Data\ProductInterface;
use Magento\Catalog\Pricing\Render\FinalPriceBox as OriginalFinalPriceBox;

class FinalPriceBox
{
    /**
     * @param OriginalFinalPriceBox $subject
     * @param $result
     *
     * @return string
     */
    public function afterRenderAmountMinimal(OriginalFinalPriceBox $subject, $result): string
    {
        $suffix = '';

        if ($item = $subject->getSaleableItem()) {
            if ($item instanceof ProductInterface) {
                if ($tierPrices = $item->getTierPrices()) {
                    $qty = 0;
                    $value = 999999;
                    foreach ($tierPrices as $price) {
                        if ($price->getValue() < $value) {
                            $value = $price->getValue();
                            $qty = $price->getQty();
                        }
                    }

                    if ($qty) {
                        $suffix = '<span class="price-unit-label">' . __('for %1 units', (int)$qty) . '</span>';
                    }
                }
            }
        }

        return $result . $suffix;
    }
}