import { getTranslations } from "next-intl/server";
import { houses, allApartments, getHouseById, bookingConfig } from "@/src/config/apartments";
import { getAvailability, getEffectiveMinStay } from "@/src/lib/beds24";
import { calculatePrice } from "@/src/lib/pricing";
import { nightsBetween, parseDateOnly } from "@/src/lib/date";
import { HouseCard } from "@/components/ui/HouseCard";
import { AvailabilitySearchBar } from "@/components/ui/AvailabilitySearchBar";
import { AvailableApartmentCard } from "@/components/ui/AvailableApartmentCard";
import { NoAvailabilityContact } from "@/components/ui/NoAvailabilityContact";
import Link from "next/link";

export async function generateMetadata({
  params: { locale },
}: {
  params: { locale: string };
}) {
  const t = await getTranslations({ locale, namespace: "home" });
  return {
    title: t("houses.title"),
    description: `${t("houses.title")} – ${t("houses.subtitle")}`,
  };
}

export default async function HousesPage({
  params: { locale },
  searchParams,
}: {
  params: { locale: string };
  searchParams: { arrival?: string; departure?: string; months?: string };
}) {
  const t = await getTranslations({ locale, namespace: "home" });
  const tSearch = await getTranslations({ locale, namespace: "houses.search" });

  const { arrival, departure } = searchParams;
  const hasSearch = Boolean(arrival && departure);

  if (hasSearch && arrival && departure) {
    const nights = nightsBetween(arrival, departure);

    const results = await Promise.all(
      allApartments.map(async (apartment) => {
        const house = getHouseById(apartment.houseId)!;
        try {
          const [availability, minStayNights] = await Promise.all([
            getAvailability({
              houseId: apartment.houseId,
              propertyId: apartment.beds24PropertyId,
              roomId: apartment.beds24RoomId,
              start: arrival,
              end: departure,
            }),
            getEffectiveMinStay(
              apartment.houseId,
              apartment.beds24PropertyId,
              apartment.beds24RoomId,
              arrival,
              bookingConfig.minStayNights
            ),
          ]);
          const minStayValid = nights > 0 && nights >= minStayNights;
          const price = calculatePrice(availability.price, nights, availability.currency);
          return {
            apartment,
            house,
            available: availability.available,
            minStayValid,
            pricePerNight: price.basePricePerNight,
            currency: price.currency,
          };
        } catch {
          return {
            apartment,
            house,
            available: false,
            minStayValid: false,
            pricePerNight: undefined,
            currency: undefined,
          };
        }
      })
    );

    results.sort((a, b) => {
      const aOk = a.available && a.minStayValid;
      const bOk = b.available && b.minStayValid;
      return aOk === bOk ? 0 : aOk ? -1 : 1;
    });

    const anyAvailable = results.some((r) => r.available && r.minStayValid);

    return (
      <div className="py-16">
        <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
          <div className="text-center mb-8">
            <h1 className="text-4xl font-bold mb-4">{tSearch("resultsTitle")}</h1>
            <p className="text-brand-grey text-lg">
              {tSearch("resultsSubtitle")}: {parseDateOnly(arrival).toLocaleDateString(locale === "de" ? "de-DE" : "en-US")} –{" "}
              {parseDateOnly(departure).toLocaleDateString(locale === "de" ? "de-DE" : "en-US")}
            </p>
          </div>

          <AvailabilitySearchBar
            locale={locale}
            defaultArrival={arrival}
            defaultMonths={searchParams.months ? Number(searchParams.months) : undefined}
          />

          {!anyAvailable && (
            <div className="mb-12">
              <p className="text-center text-brand-grey mb-8">{tSearch("noResults")}</p>
              <NoAvailabilityContact
                locale={locale}
                context={`${locale === "de" ? "Gewünschter Zeitraum" : "Requested dates"}: ${arrival} – ${departure}`}
              />
            </div>
          )}

          {anyAvailable && (
            <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-8 mb-12">
              {results.map(({ apartment, house, available, minStayValid, pricePerNight, currency }) => (
                <AvailableApartmentCard
                  key={apartment.id}
                  apartment={apartment}
                  house={house}
                  locale={locale}
                  available={available}
                  minStayValid={minStayValid}
                  pricePerNight={pricePerNight}
                  currency={currency}
                  arrival={arrival}
                  departure={departure}
                />
              ))}
            </div>
          )}

          <div className="text-center">
            <Link
              href={`/${locale}/houses`}
              className="text-brand-green-dark font-medium hover:text-brand-green"
            >
              {tSearch("showAllHouses")}
            </Link>
          </div>
        </div>
      </div>
    );
  }

  return (
    <div className="py-16">
      <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
        <div className="text-center mb-12">
          <h1 className="text-4xl font-bold mb-4">{t("houses.title")}</h1>
          <p className="text-brand-grey text-lg">{t("houses.subtitle")}</p>
        </div>

        <AvailabilitySearchBar locale={locale} />

        <div className="grid grid-cols-1 md:grid-cols-2 gap-8">
          {houses.map((house) => (
            <HouseCard key={house.id} house={house} locale={locale} />
          ))}
        </div>
      </div>
    </div>
  );
}