change free gift price from 0 to 0.01

Cart : Add price value in free gift

if ( ! class_exists( 'ASEPTA_FreeGift_PriceFix' ) ) {
	class ASEPTA_FreeGift_PriceFix {

		public function __construct() {
			// Remove FKCart filters early to prevent conflicts
			add_action( 'init', [ $this, 'detach_fkcart_price_filters' ], 5 );

			// Set 0.01 PLN for free gift items
			add_action( 'woocommerce_before_calculate_totals', [ $this, 'set_one_grosz' ], 99 );
			add_action( 'woocommerce_cart_loaded_from_session', [ $this, 'set_one_grosz' ], 99 );

			// Force display 0.01 PLN instead of "Free" in cart
			add_filter( 'woocommerce_cart_item_price', [ $this, 'force_display_one_grosz' ], 9999, 3 );
			add_filter( 'woocommerce_cart_item_subtotal', [ $this, 'force_display_one_grosz' ], 9999, 3 );

			// Add "GRATIS DO ZAMÓWIENIA" badge for free gifts
			add_filter( 'woocommerce_cart_item_name', [ $this, 'badge_for_free_gift' ], 10, 3 );
		}

		/**
		 * Remove FKCart's price filters that force 0.00
		 */
		public function detach_fkcart_price_filters() {
			if ( class_exists( '\FKCart\Pro\Rewards' ) ) {
				$rewards = \FKCart\Pro\Rewards::getInstance();
				remove_filter( 'woocommerce_product_get_price', [ $rewards, 'handle_reward_free_product' ], 10000 );
				remove_filter( 'woocommerce_product_variation_get_price', [ $rewards, 'handle_reward_free_product' ], 10000 );
				remove_filter( 'woocommerce_product_variation_get_regular_price', [ $rewards, 'handle_reward_free_product' ], 10000 );
			}
		}

		/**
		 * Set 0.01 PLN price for FKCart free gift products
		 *
		 * @param WC_Cart $cart
		 */
		public function set_one_grosz( $cart ) {
			if ( ! $cart || ( is_admin() && ! wp_doing_ajax() ) ) {
				return;
			}

			foreach ( $cart->get_cart_contents() as $key => $item ) {
				if ( empty( $item['data'] ) || ! ( $item['data'] instanceof WC_Product ) ) {
					continue;
				}

				// Check if item is a FKCart free gift
				$is_gift = isset( $item['_fkcart_free_gift'] ) ||
				           'yes' === $item['data']->get_meta( '_fkcart_free_gift' );

				if ( $is_gift ) {
					// Set price to 0.01 PLN
					$item['data']->set_price( 0.01 );

					// Extra safety: Remove filters again inside the loop
					$this->detach_fkcart_price_filters();
				}
			}
		}

		/**
		 * Force display 0.01 PLN instead of "Free" text
		 *
		 * @param string $html
		 * @param array $cart_item
		 * @param string $cart_item_key
		 * @return string
		 */
		public function force_display_one_grosz( $html, $cart_item, $cart_item_key ) {
			if ( empty( $cart_item['data'] ) || ! ( $cart_item['data'] instanceof WC_Product ) ) {
				return $html;
			}

			$price = (float) $cart_item['data']->get_price();

			// If price is 0.01 (with floating point tolerance), force display
			if ( $price > 0 && $price <= 0.010001 ) {
				$html = wc_price( 0.01 );
			}

			return $html;
		}

		/**
		 * Add "GRATIS DO ZAMÓWIENIA" badge for free gift items
		 *
		 * @param string $name Product name
		 * @param array $cart_item
		 * @param string $cart_item_key
		 * @return string
		 */
		public function badge_for_free_gift( $name, $cart_item, $cart_item_key ) {
			if ( empty( $cart_item['data'] ) || ! ( $cart_item['data'] instanceof WC_Product ) ) {
				return $name;
			}

			$price = (float) $cart_item['data']->get_price();

			// Add badge if price is 0.01 or less (with floating point tolerance)
			if ( $price <= 0.01 + 0.000001 ) {
				$badge = '<div class="fkcart-free-badge" aria-label="Free gift">' .
				         esc_html__( 'GRATIS DO ZAMÓWIENIA', 'woocommerce' ) .
				         '</div>';
				$name = $badge . $name;
			}

			return $name;
		}
	}

	new ASEPTA_FreeGift_PriceFix();
}