<?php

namespace Modules\Core\Payment\Pipelines\Cart;

use Closure;
use Lunar\Base\ValueObjects\Cart\ShippingBreakdownItem;
use Lunar\DataTypes\Price;
use Lunar\Models\Contracts\Cart as CartContract;
use Modules\Core\Payment\Models\PaymentMethod;

final class ApplyPaymentMethodFee
{
    /**
     * Called just before cart totals are calculated, right after
     * Lunar\Pipelines\Cart\ApplyShipping. Generic across every
     * Modules\Core\Payment\Models\PaymentMethod row, not just cash on
     * delivery — whichever type the shopper picked (Cart::meta
     * ['payment_method']), its own `data.fee` (set via the Filament "Edit
     * fee" action) is applied if present, no matter its slug/name/driver.
     *
     * Must add the fee as its own Lunar\Base\ValueObjects\Cart\
     * ShippingBreakdownItem on $cart->shippingBreakdown rather than
     * bumping $cart->shippingTotal directly — the later Lunar\Pipelines\
     * Cart\CalculateTax step unconditionally recomputes shippingTotal
     * (and shipping tax) from shippingBreakdown's item sum, so a value
     * set only on the plain property is silently discarded before the
     * cart finishes calculating.
     *
     * @param  Closure(CartContract): mixed  $next
     */
    public function handle(CartContract $cart, Closure $next): mixed
    {
        $type = $cart->meta['payment_method'] ?? null;

        if ($type) {
            $fee = (int) (PaymentMethod::where('type', $type)->first()?->data['fee'] ?? 0);

            if ($fee > 0) {
                $cart->shippingBreakdown->items->put('payment-method-fee', new ShippingBreakdownItem(
                    name: 'Payment method fee',
                    identifier: 'payment-method-fee',
                    price: new Price($fee, $cart->currency, 1),
                ));
            }
        }

        return $next($cart);
    }
}