import { notFound } from "next/navigation";
import { getTranslations } from "next-intl/server";
import { getApartmentBySlug, getHouseById, bookingConfig } from "@/src/config/apartments";
import { getEffectiveMinStay } from "@/src/lib/beds24";
import { tomorrowDateString } from "@/src/lib/date";
import { Bed, Bath, Users, Calendar, Check, Wind, Sofa, Wifi, WashingMachine, Tv } from "lucide-react";
import { BookingForm } from "@/components/ui/BookingForm";
import { ImageGallery } from "@/components/ui/ImageGallery";
import Link from "next/link";

export async function generateMetadata({
  params: { locale, apartmentSlug },
}: {
  params: { locale: string; apartmentSlug: string };
}) {
  const apartment = getApartmentBySlug(apartmentSlug);
  if (!apartment) return { title: "Not Found" };

  const t = await getTranslations({ locale, namespace: "metadata" });
  return {
    title: `${apartment.nameEn} - ${t("title")}`,
    description: apartment.descriptionEn || t("description"),
  };
}

export default async function ApartmentPage({
  params: { locale, apartmentSlug },
}: {
  params: { locale: string; apartmentSlug: string };
}) {
  const t = await getTranslations({ locale, namespace: "apartment" });
  const apartment = getApartmentBySlug(apartmentSlug);
  const house = apartment ? getHouseById(apartment.houseId) : undefined;

  if (!apartment || !house) notFound();

  // Real, effective minimum stay for this apartment as of "tomorrow" — this
  // combines Beds24's room-level minimum with whatever the currently active
  // rate/price plan requires (the higher of the two wins), so it reflects
  // what a guest could actually book, not just the room's base setting.
  // The BookingForm re-fetches this whenever the guest picks a different
  // check-in date, since it can vary by season.
  const minStayNights = await getEffectiveMinStay(
    apartment.houseId,
    apartment.beds24PropertyId,
    apartment.beds24RoomId,
    tomorrowDateString(),
    bookingConfig.minStayNights
  );

  const displayName = locale === "de" ? apartment.name : apartment.nameEn;
  const displayDescription =
    locale === "de" ? apartment.description : apartment.descriptionEn;
  const displayFloor = locale === "de" ? apartment.floor : apartment.floorEn;
  const amenities =
    locale === "de" ? apartment.amenities : apartment.amenitiesEn;
  const houseName = locale === "de" ? house.name : house.nameEn;

  const hasAmenity = (keys: string[]) =>
    amenities.some((a) => keys.some((k) => a.toLowerCase().includes(k.toLowerCase())));

  // Apartment-specific highlights (excludes "Fully furnished", already shown elsewhere)
  const specificHighlights = [
    hasAmenity(["Klimaanlage", "Air conditioning"]) && {
      icon: Wind,
      title: locale === "de" ? "Klimaanlage" : "Air conditioning",
    },
    hasAmenity(["Waschmaschine", "Washing machine"]) && {
      icon: WashingMachine,
      title: locale === "de" ? "Eigene Waschmaschine" : "In-unit Washer",
    },
    hasAmenity(["WLAN", "WiFi"]) && {
      icon: Wifi,
      title: locale === "de" ? "High-Speed WLAN" : "High-Speed WiFi",
    },
    hasAmenity(["TV"]) && {
      icon: Tv,
      title: "Smart TV",
    },
  ].filter(Boolean) as { icon: typeof Wind; title: string }[];

  return (
    <div className="py-16">
      <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
        <div className="mb-6">
          <Link
            href={`/${locale}/houses/${house.slug}`}
            className="text-brand-green-dark hover:text-brand-green"
          >
            ← {houseName}
          </Link>
        </div>

        <div className="grid grid-cols-1 lg:grid-cols-2 gap-12 mb-12">
          <ImageGallery
            images={apartment.images.length > 0 ? apartment.images : ["/images/placeholder.jpg"]}
            alt={displayName}
          />
          <div>
            <h1 className="text-4xl font-bold mb-2">{displayName}</h1>
            <p className="text-brand-grey mb-6">{houseName} • {displayFloor}</p>
            
            {displayDescription && (
              <p className="text-brand-grey leading-relaxed mb-6">
                {displayDescription}
              </p>
            )}

            <div className="grid grid-cols-2 gap-4 mb-8">
              <div className="flex items-center gap-3 p-4 bg-brand-grey-soft rounded-xl">
                <Users className="w-5 h-5 text-brand-green" />
                <div>
                  <p className="text-sm text-brand-grey">{t("guests")}</p>
                  <p className="font-semibold">{apartment.maxGuests}</p>
                </div>
              </div>
              <div className="flex items-center gap-3 p-4 bg-brand-grey-soft rounded-xl">
                <Calendar className="w-5 h-5 text-brand-green" />
                <div>
                  <p className="text-sm text-brand-grey">{t("minStay")}</p>
                  <p className="font-semibold">{minStayNights} {t("nights")}</p>
                </div>
              </div>
              {amenities.some((a) =>
                ["Klimaanlage", "Air conditioning"].includes(a)
              ) && (
                <div className="flex items-center gap-3 p-4 bg-brand-green/10 rounded-xl border border-brand-green/20 col-span-2 sm:col-span-1">
                  <Wind className="w-5 h-5 text-brand-green" />
                  <div>
                    <p className="text-sm text-brand-grey">
                      {locale === "de" ? "Klimaanlage" : "Air conditioning"}
                    </p>
                    <p className="font-semibold text-brand-green-dark">
                      {locale === "de" ? "Vorhanden" : "Available"}
                    </p>
                  </div>
                </div>
              )}
              <div className="flex items-center gap-3 p-4 bg-brand-green/10 rounded-xl border border-brand-green/20">
                <Sofa className="w-5 h-5 text-brand-green" />
                <div>
                  <p className="text-sm text-brand-grey">
                    {locale === "de" ? "Vollmöbliert" : "Fully furnished"}
                  </p>
                  <p className="font-semibold text-brand-green-dark">
                    {locale === "de" ? "Ja" : "Yes"}
                  </p>
                </div>
              </div>
              {apartment.bedrooms && (
                <div className="flex items-center gap-3 p-4 bg-brand-grey-soft rounded-xl">
                  <Bed className="w-5 h-5 text-brand-green" />
                  <div>
                    <p className="text-sm text-brand-grey">{locale === "de" ? "Schlafzimmer" : "Bedrooms"}</p>
                    <p className="font-semibold">{apartment.bedrooms}</p>
                  </div>
                </div>
              )}
              {apartment.bathrooms && (
                <div className="flex items-center gap-3 p-4 bg-brand-grey-soft rounded-xl">
                  <Bath className="w-5 h-5 text-brand-green" />
                  <div>
                    <p className="text-sm text-brand-grey">{locale === "de" ? "Bäder" : "Bathrooms"}</p>
                    <p className="font-semibold">{apartment.bathrooms}</p>
                  </div>
                </div>
              )}
            </div>

            <BookingForm apartment={apartment} locale={locale} minStayNights={minStayNights} />
          </div>
        </div>

        {specificHighlights.length > 0 && (
          <div className="grid grid-cols-2 md:grid-cols-4 gap-5 mb-12">
            {specificHighlights.map((highlight, index) => {
              const Icon = highlight.icon;
              return (
                <div
                  key={index}
                  className="flex flex-col items-center text-center gap-4 p-6 bg-white rounded-2xl border-2 border-brand-green/20 shadow-md hover:shadow-xl hover:-translate-y-1 transition-all"
                >
                  <div className="p-4 bg-brand-green rounded-2xl text-white shadow-sm">
                    <Icon className="w-9 h-9" />
                  </div>
                  <p className="font-bold text-brand-grey-dark text-lg leading-tight">
                    {highlight.title}
                  </p>
                </div>
              );
            })}
          </div>
        )}

        <div className="bg-brand-grey-soft rounded-2xl p-8">
          <h2 className="text-2xl font-bold mb-6">{t("features")}</h2>
          <div className="grid grid-cols-1 sm:grid-cols-2 md:grid-cols-3 gap-4">
            {amenities.map((amenity, index) => (
              <div key={index} className="flex items-center gap-3">
                <Check className="w-5 h-5 text-brand-green flex-shrink-0" />
                <span className="text-brand-grey-dark">{amenity}</span>
              </div>
            ))}
          </div>
        </div>
      </div>
    </div>
  );
}