Algol Plus Ltd

// One Item discount fix
add_action( 'wdp_before_apply_to_wc_cart', function ( $wdp_cart, $wc_cart ) {
  remove_filter( 'woocommerce_cart_item_price', 'wc_gzd_cart_product_unit_price', 0 );
  add_filter( 'woocommerce_cart_item_price', 'wc_gzd_cart_product_unit_price', 100, 3 );
}, 10, 2 );

// fix product price after purchase it
add_action( 'woocommerce_gzd_before_get_unit_price', function($product){
  $product->recalculate_unit_price();
}, 10, 1 );

add_filter( 'woocommerce_gzd_get_unit_price_raw', function ( $unit_price, $product ) {
  /**
   * @var $product WC_GZD_Product
   */

  if ( isset( $product->wdp_original_price ) ) {
    if ( $product->wdp_original_price > $product->get_price( '' ) ) {
      $product->recalculate_unit_price( array( 'price' => $product->get_price( '' ) ) );
      $unit_price = $product->unit_price;
    }
  } else {
      if ( ! is_cart() && ! is_checkout() ) {
          if ( $product->is_on_sale() ) {
            $product->recalculate_unit_price( array( 'price' => $product->get_sale_price() ) );
            $unit_price = $product->unit_price;
            }
        }
    }

  return $unit_price;
}, 10, 2 );

add_filter( 'woocommerce_cart_item_product', function ( $product, $cart_item, $cart_item_key ) {
  /**
   * @var WC_Product $product
   *
   */
  if ( isset( $cart_item['wdp_original_price'] ) ) {
    if ( isset( $product->gzd_product ) ) {
      $product->gzd_product->wdp_original_price = $cart_item['wdp_original_price'];
      $product->gzd_product->get_wc_product()->set_price($product->get_price( '' ));
    }
  }

  return $product;
}, 10, 3 );


add_filter( 'woocommerce_gzd_order_item_unit_price', function ( $price_html, $gzd_product, $item, $order ) {
    if ( isset($item->legacy_values['data']) ) {
      $gzd_product->get_wc_product()->set_price($item->legacy_values['data']->get_price(''));
      $price_html = $gzd_product->get_unit_html( false );
    }

  return $price_html;
}, 10, 4 );