import { Prisma, ListingStatus } from '@prisma/client';
import { prisma } from './prisma';
import { DEFAULT_LOCALE, SAMPLE_LISTING_SLUG } from './sampleListing';

export type ListingWithTranslations = Prisma.ListingTranslationGetPayload<{
  include: {
    listing: {
      include: {
        images: true;
        owner: true;
      };
    };
  };
}>;

type FetchOptions = {
  slug: string;
  locale?: string;
};

/**
 * Fetch a listing translation by slug and locale.
 * Falls back to any locale if the requested locale is missing.
 */
export async function getListingBySlug({ slug, locale }: FetchOptions): Promise<ListingWithTranslations | null> {
  const targetLocale = locale ?? DEFAULT_LOCALE;

  const translation = await prisma.listingTranslation.findFirst({
    where: { slug, locale: targetLocale, listing: { status: ListingStatus.PUBLISHED, removedAt: null } },
    include: {
      listing: {
        include: {
          images: { orderBy: { order: 'asc' } },
          owner: true,
        },
      },
    },
  });

  if (translation) {
    return translation;
  }

  // Fallback: first translation for this slug
  return prisma.listingTranslation.findFirst({
    where: { slug, listing: { status: ListingStatus.PUBLISHED, removedAt: null } },
    include: {
      listing: {
        include: {
          images: { orderBy: { order: 'asc' } },
          owner: true,
        },
      },
    },
    orderBy: { createdAt: 'asc' },
  });
}

export { SAMPLE_LISTING_SLUG, DEFAULT_LOCALE };