function toIsoString(value) {
  return value instanceof Date ? value.toISOString() : value;
}

export function toPublicListingDto(listing) {
  return {
    id: listing.id,
    productName: listing.productName,
    categoryId: listing.categoryId,
    conditionId: listing.conditionId,
    conditionName: listing.conditionName ?? null,
    conditionCode: listing.conditionCode ?? null,
    askingPriceMinor: listing.askingPriceMinor,
    marketValueMinor: listing.marketValueMinor ?? null,
    marketValueCurrency: listing.marketValueCurrency ?? null,
    marketValueUpdatedAt: toIsoString(listing.marketValueUpdatedAt),
    status: listing.status,
    notes: listing.notes ?? null,
    images: listing.images ?? [],
    sellerDisplayName: listing.sellerDisplayName ?? null,
    sellerContactEmail: listing.sellerContactEmail ?? null,
    sellerContactPhone: listing.sellerContactPhone ?? null,
    createdAt: toIsoString(listing.createdAt),
    updatedAt: toIsoString(listing.updatedAt),
  };
}