<?php

namespace App\Services\PurchaseOrders;

use App\Models\PurchaseOrder;
use RuntimeException;

class PurchaseOrderStatusService
{
    public function cancel(int $poId): PurchaseOrder
    {
        $po = PurchaseOrder::query()->find($poId);
        if (!$po || $po->status === PurchaseOrder::STATUS_RECEIVED) {
            throw new RuntimeException('Cannot cancel this PO.');
        }

        $po->status = PurchaseOrder::STATUS_CANCELED;
        $po->save();

        return $po;
    }
}