Get woocommerce cart items

foreach( WC()->cart->get_cart() as $cart_item_key => $values ) {
$_product = $values[‘data’];
$cart_products[] = $_product->id;
}

WC()->cart->add_to_cart( $product_id );   // Add product to cart

WC()->cart->remove_cart_item( $cart_item_key );   // Remove product from cart