<?php

declare(strict_types=1);

namespace app\common\service\pharmacy;

use DomainException;

final class EjPharmacyTrackingPolicy
{
    /**
     * @param array<string,mixed>|null $current Active tracking for this order.
     * @param array<string,mixed>|null $matching Tracking already owning the incoming number.
     * @return array{action:string,archive_current:bool}
     */
    public static function select(?array $current, ?array $matching, int $orderId, string $trackingNumber): array
    {
        $trackingNumber = trim($trackingNumber);
        if ($current !== null && trim((string) ($current['tracking_number'] ?? '')) === $trackingNumber) {
            return ['action' => 'REUSE_CURRENT', 'archive_current' => false];
        }

        if ($matching !== null) {
            $ownerOrderId = (int) ($matching['order_id'] ?? 0);
            if ($ownerOrderId !== 0 && $ownerOrderId !== $orderId) {
                throw new DomainException('该运单号已关联其他订单，禁止重新绑定');
            }

            return ['action' => 'REUSE_MATCHING', 'archive_current' => $current !== null];
        }

        return ['action' => 'CREATE', 'archive_current' => $current !== null];
    }
}