TooManyFields

<?php
class Order
{
    private int $id;
    private string $status;
    private Customer $customer;
    private Address $billingAddress;
    private Address $shippingAddress;
    private PaymentMethod $payment;
    private array $items;
    private float $subtotal;
    private float $tax;
    private float $shipping;
    private float $discount;
    private float $total;
    private \DateTime $createdAt;
    private \DateTime $updatedAt;
    private ?string $notes;
    // ... more fields
}

<?php
class Order
{
    public function __construct(
        private readonly OrderId $id,
        private readonly Customer $customer,
        private readonly OrderItems $items,
        private readonly OrderPricing $pricing,
        private OrderStatus $status,
    ) {}
}

class OrderPricing
{
    public function __construct(
        private readonly Money $subtotal,
        private readonly Money $tax,
        private readonly Money $shipping,
        private readonly Money $discount,
    ) {}

    public function total(): Money
    {
        // Focused calculation
    }
}