import type { Metadata } from "next";
import { notFound } from "next/navigation";
import { getTranslations } from "next-intl/server";
import { Navbar } from "@/components/layout/navbar";
import { Footer } from "@/components/layout/footer";
import { CafeJsonLd } from "@/components/seo/cafe-json-ld";
import { getCafe, getCafeMenu, getCafeReviews, getAllCafeSlugs, discoverCafes } from "@/lib/api";
import {
  MapPin, Phone, Clock, Star, BadgeCheck, Instagram,
  Globe, ChevronLeft, Wifi, Coffee, Users
} from "lucide-react";
import { getDayLabel, PRICE_TIER_LABELS, NOISE_LABELS, formatRating, cn } from "@/lib/utils";
import { CafeCard } from "@/components/cafe/cafe-card";

const BASE = process.env.NEXT_PUBLIC_SITE_URL ?? "https://find.meezi.ir";

export async function generateStaticParams() {
  const slugs = await getAllCafeSlugs();
  const locales = ["fa", "en"];
  return locales.flatMap((locale) => slugs.map((slug) => ({ locale, slug })));
}

export async function generateMetadata({
  params,
}: {
  params: Promise<{ locale: string; slug: string }>;
}): Promise<Metadata> {
  const { locale, slug } = await params;
  const cafe = await getCafe(slug);
  if (!cafe) return { title: "Cafe not found" };

  const name = locale === "en" && cafe.nameEn ? cafe.nameEn : cafe.name;
  const description = cafe.description
    ?? (locale === "fa"
      ? `${name} در ${cafe.city ?? "ایران"} — امتیاز ${formatRating(cafe.averageRating)} از ${cafe.reviewCount} نظر`
      : `${name} in ${cafe.city ?? "Iran"} — rated ${formatRating(cafe.averageRating)} from ${cafe.reviewCount} reviews`);

  const ogImage = cafe.coverImageUrl
    ?? `${BASE}/api/og?t=${encodeURIComponent(name)}&s=${encodeURIComponent(description)}`;

  return {
    title: name,
    description,
    openGraph: {
      type: "website",
      title: name,
      description,
      images: [{ url: ogImage, width: 1200, height: 630, alt: name }],
      locale: locale === "fa" ? "fa_IR" : "en_US",
    },
    twitter: { card: "summary_large_image", title: name, description, images: [ogImage] },
    alternates: {
      canonical: `${BASE}/${locale}/cafe/${slug}`,
      languages: {
        fa: `${BASE}/fa/cafe/${slug}`,
        en: `${BASE}/en/cafe/${slug}`,
      },
    },
  };
}

const DAY_ORDER = ["sat", "sun", "mon", "tue", "wed", "thu", "fri"] as const;

export default async function CafePage({
  params,
}: {
  params: Promise<{ locale: string; slug: string }>;
}) {
  const { locale, slug } = await params;
  const t = await getTranslations({ locale, namespace: "cafe" });
  const isFa = locale === "fa";

  // Resolve the café first so an unknown slug 404s cleanly instead of doing
  // (and potentially erroring on) the menu/review fetches.
  const cafe = await getCafe(slug);
  if (!cafe) notFound();

  const [menu, reviews] = await Promise.all([
    getCafeMenu(slug),
    getCafeReviews(slug),
  ]);

  const name = isFa ? cafe.name : (cafe.nameEn ?? cafe.name);
  // discoverProfile may be absent for cafés that never filled it in — fall back
  // to an empty profile so the page renders instead of throwing a 500.
  const profile = cafe.discoverProfile ?? {
    themes: [],
    size: null,
    floors: null,
    vibes: [],
    occasions: [],
    spaceFeatures: [],
    noiseLevel: null,
    priceTier: null,
  };
  const priceTier = profile.priceTier;

  // Similar cafes
  const similar = cafe.city
    ? (await discoverCafes({ city: cafe.city, sort: "rating" }))
        .filter((c) => c.slug !== slug)
        .slice(0, 4)
    : [];

  return (
    <>
      <CafeJsonLd cafe={cafe} locale={locale} baseUrl={BASE} />
      <Navbar />

      <main className="pb-16">
        {/* Hero cover */}
        <div className="relative h-56 overflow-hidden bg-gray-200 sm:h-80">
          {cafe.coverImageUrl ? (
            <img
              src={cafe.coverImageUrl}
              alt={name}
              className="h-full w-full object-cover"
              priority-fetch="high"
            />
          ) : (
            <div className="flex h-full items-center justify-center bg-gradient-to-br from-brand-100 to-brand-200">
              <Coffee className="h-16 w-16 text-brand-300" />
            </div>
          )}
          {/* Gradient overlay */}
          <div className="absolute inset-0 bg-gradient-to-t from-black/60 via-transparent to-transparent" />

          {/* Back link */}
          <a
            href={`/${locale}/search`}
            className="absolute start-4 top-4 flex items-center gap-1 rounded-full bg-black/30 px-3 py-1.5 text-xs font-medium text-white backdrop-blur-sm transition hover:bg-black/50"
          >
            {isFa ? <ChevronLeft className="h-3.5 w-3.5 rotate-180" /> : <ChevronLeft className="h-3.5 w-3.5" />}
            {t("backToSearch")}
          </a>

          {/* Open badge */}
          <div className={cn(
            "absolute end-4 top-4 rounded-full px-3 py-1 text-xs font-semibold",
            cafe.isOpenNow ? "bg-emerald-500 text-white" : "bg-gray-800/70 text-white"
          )}>
            {cafe.isOpenNow ? t("openNow") : t("closedNow")}
          </div>

          {/* Name / city overlay */}
          <div className="absolute bottom-4 start-4 end-4">
            <div className="flex items-end gap-3">
              {cafe.logoUrl && (
                <img
                  src={cafe.logoUrl}
                  alt=""
                  className="h-14 w-14 shrink-0 rounded-2xl border-2 border-white bg-white object-cover shadow-lg"
                />
              )}
              <div className="min-w-0">
                <h1 className="flex items-center gap-2 text-xl font-extrabold text-white sm:text-2xl">
                  {name}
                  {cafe.isVerified && (
                    <BadgeCheck className="h-5 w-5 text-emerald-400" aria-label={t("verified")} />
                  )}
                </h1>
                {cafe.city && (
                  <p className="mt-0.5 flex items-center gap-1 text-sm text-white/80">
                    <MapPin className="h-3.5 w-3.5" />
                    {cafe.city}
                    {cafe.address && ` — ${cafe.address}`}
                  </p>
                )}
              </div>
            </div>
          </div>
        </div>

        <div className="mx-auto max-w-5xl px-4 sm:px-6">
          {/* Quick stats row */}
          <div className="mt-6 flex flex-wrap items-center gap-4">
            {cafe.reviewCount > 0 && (
              <div className="flex items-center gap-1.5">
                <Star className="h-4 w-4 fill-amber-400 text-amber-400" />
                <span className="text-lg font-bold">{formatRating(cafe.averageRating)}</span>
                <span className="text-sm text-gray-400">({cafe.reviewCount} {t("reviews")})</span>
              </div>
            )}
            {priceTier && (
              <span className="rounded-full border border-gray-200 px-3 py-0.5 text-sm text-gray-600">
                {PRICE_TIER_LABELS[priceTier]?.[isFa ? "fa" : "en"] ?? priceTier}
              </span>
            )}
            {profile.noiseLevel && (
              <span className="rounded-full border border-gray-200 px-3 py-0.5 text-sm text-gray-600">
                {NOISE_LABELS[profile.noiseLevel]?.[isFa ? "fa" : "en"] ?? profile.noiseLevel}
              </span>
            )}
          </div>

          <div className="mt-6 grid grid-cols-1 gap-6 lg:grid-cols-3">
            {/* Main column */}
            <div className="lg:col-span-2 space-y-6">

              {/* Description */}
              {cafe.description && (
                <section className="rounded-2xl border border-gray-100 bg-white p-5">
                  <h2 className="mb-3 text-sm font-semibold text-gray-900">{t("about")}</h2>
                  <p className="text-sm leading-relaxed text-gray-600">{cafe.description}</p>
                </section>
              )}

              {/* Attributes */}
              {(profile.themes.length > 0 || profile.vibes.length > 0 || profile.occasions.length > 0 || profile.spaceFeatures.length > 0) && (
                <section className="rounded-2xl border border-gray-100 bg-white p-5">
                  <h2 className="mb-4 text-sm font-semibold text-gray-900">{t("features")}</h2>
                  <div className="space-y-3">
                    {profile.themes.length > 0 && (
                      <TagRow label={t("themes")} tags={profile.themes} color="brand" />
                    )}
                    {profile.vibes.length > 0 && (
                      <TagRow label={t("vibes")} tags={profile.vibes} color="purple" />
                    )}
                    {profile.occasions.length > 0 && (
                      <TagRow label={t("occasions")} tags={profile.occasions} color="amber" />
                    )}
                    {profile.spaceFeatures.length > 0 && (
                      <TagRow label={t("spaceFeatures")} tags={profile.spaceFeatures} color="gray" />
                    )}
                  </div>
                </section>
              )}

              {/* Gallery */}
              {cafe.galleryUrls.length > 0 && (
                <section className="rounded-2xl border border-gray-100 bg-white p-5">
                  <h2 className="mb-3 text-sm font-semibold text-gray-900">{t("gallery")}</h2>
                  <div className="grid grid-cols-3 gap-2 sm:grid-cols-4">
                    {cafe.galleryUrls.map((url, i) => (
                      <img
                        key={i}
                        src={url}
                        alt={`${name} — ${i + 1}`}
                        className="aspect-square w-full rounded-xl object-cover"
                        loading="lazy"
                      />
                    ))}
                  </div>
                </section>
              )}

              {/* Menu preview */}
              {menu && menu.categories.length > 0 && (
                <section className="rounded-2xl border border-gray-100 bg-white p-5">
                  <h2 className="mb-4 text-sm font-semibold text-gray-900">{t("menu")}</h2>
                  <div className="space-y-4">
                    {menu.categories.slice(0, 3).map((cat) => (
                      <div key={cat.id}>
                        <p className="mb-2 text-xs font-semibold uppercase tracking-wider text-gray-400">
                          {isFa ? cat.name : (cat.nameEn ?? cat.name)}
                        </p>
                        <div className="space-y-2">
                          {cat.items.slice(0, 4).map((item) => (
                            <div key={item.id} className="flex items-center justify-between gap-3">
                              <div className="flex min-w-0 items-center gap-3">
                                {item.imageUrl && (
                                  <img src={item.imageUrl} alt="" className="h-10 w-10 shrink-0 rounded-lg object-cover" />
                                )}
                                <div className="min-w-0">
                                  <p className="truncate text-sm font-medium text-gray-800">
                                    {isFa ? item.name : (item.nameEn ?? item.name)}
                                  </p>
                                  {item.description && (
                                    <p className="truncate text-xs text-gray-400">{item.description}</p>
                                  )}
                                </div>
                              </div>
                              <span className="shrink-0 text-sm font-semibold text-brand-700">
                                {new Intl.NumberFormat(isFa ? "fa-IR" : "en-US").format(item.price)}
                              </span>
                            </div>
                          ))}
                        </div>
                      </div>
                    ))}
                  </div>
                  <a
                    href={`https://app.meezi.ir/m/${cafe.slug}`}
                    target="_blank"
                    rel="noopener"
                    className="mt-4 flex w-full items-center justify-center gap-2 rounded-xl border border-brand-200 py-2.5 text-sm font-semibold text-brand-700 transition hover:bg-brand-50"
                  >
                    {t("viewMenu")}
                  </a>
                </section>
              )}

              {/* Reviews */}
              <section className="rounded-2xl border border-gray-100 bg-white p-5">
                <h2 className="mb-4 text-sm font-semibold text-gray-900">{t("reviewsTab")}</h2>
                {reviews.length === 0 ? (
                  <p className="text-sm text-gray-400">{t("noReviews")}</p>
                ) : (
                  <div className="space-y-4">
                    {reviews.map((r) => (
                      <div key={r.id} className="border-b border-gray-50 pb-4 last:border-0">
                        <div className="flex items-center justify-between">
                          <p className="text-sm font-semibold text-gray-900">{r.authorName}</p>
                          <div className="flex items-center gap-0.5">
                            {Array.from({ length: 5 }).map((_, i) => (
                              <Star
                                key={i}
                                className={cn("h-3 w-3", i < r.rating ? "fill-amber-400 text-amber-400" : "text-gray-200")}
                              />
                            ))}
                          </div>
                        </div>
                        {r.comment && (
                          <p className="mt-1 text-sm leading-relaxed text-gray-600">{r.comment}</p>
                        )}
                      </div>
                    ))}
                  </div>
                )}
              </section>
            </div>

            {/* Sidebar */}
            <aside className="space-y-4">
              {/* Actions */}
              <div className="rounded-2xl border border-gray-100 bg-white p-5 space-y-2.5">
                <a
                  href={`https://app.meezi.ir/m/${cafe.slug}`}
                  target="_blank"
                  rel="noopener"
                  className="flex w-full items-center justify-center gap-2 rounded-xl bg-brand-700 py-2.5 text-sm font-semibold text-white transition hover:bg-brand-800"
                >
                  <Coffee className="h-4 w-4" />
                  {t("viewMenu")}
                </a>

                {cafe.phone && (
                  <a
                    href={`tel:${cafe.phone}`}
                    className="flex w-full items-center justify-center gap-2 rounded-xl border border-gray-200 py-2.5 text-sm font-medium text-gray-700 transition hover:bg-gray-50"
                  >
                    <Phone className="h-4 w-4" />
                    {t("phone")}
                  </a>
                )}

                {cafe.address && (
                  <a
                    href={`https://maps.google.com/?q=${encodeURIComponent(`${cafe.name} ${cafe.address}`)}`}
                    target="_blank"
                    rel="noopener"
                    className="flex w-full items-center justify-center gap-2 rounded-xl border border-gray-200 py-2.5 text-sm font-medium text-gray-700 transition hover:bg-gray-50"
                  >
                    <MapPin className="h-4 w-4" />
                    {t("directions")}
                  </a>
                )}

                {cafe.instagramHandle && (
                  <a
                    href={`https://instagram.com/${cafe.instagramHandle}`}
                    target="_blank"
                    rel="noopener"
                    className="flex w-full items-center justify-center gap-2 rounded-xl border border-gray-200 py-2.5 text-sm font-medium text-gray-700 transition hover:bg-gray-50"
                  >
                    <Instagram className="h-4 w-4" />
                    @{cafe.instagramHandle}
                  </a>
                )}
              </div>

              {/* Working hours */}
              {cafe.workingHours && (
                <div className="rounded-2xl border border-gray-100 bg-white p-5">
                  <h3 className="mb-3 flex items-center gap-2 text-sm font-semibold text-gray-900">
                    <Clock className="h-4 w-4 text-brand-600" />
                    {t("workingHours")}
                  </h3>
                  <div className="space-y-1.5">
                    {DAY_ORDER.map((day) => {
                      const d = cafe.workingHours![day];
                      if (!d) return null;
                      return (
                        <div key={day} className="flex items-center justify-between text-xs">
                          <span className="text-gray-500">{getDayLabel(day, locale)}</span>
                          <span className={d.isOpen ? "font-medium text-gray-900" : "text-gray-400"}>
                            {d.isOpen && d.open && d.close ? `${d.open} – ${d.close}` : (isFa ? "تعطیل" : "Closed")}
                          </span>
                        </div>
                      );
                    })}
                  </div>
                </div>
              )}

              {/* Badges */}
              {cafe.badges.length > 0 && (
                <div className="rounded-2xl border border-gray-100 bg-white p-5">
                  <div className="flex flex-wrap gap-2">
                    {cafe.badges.map((b) => (
                      <span
                        key={b.key}
                        className="flex items-center gap-1 rounded-full bg-brand-50 px-3 py-1 text-xs font-medium text-brand-700"
                      >
                        <span>{b.icon}</span>
                        {b.label}
                      </span>
                    ))}
                  </div>
                </div>
              )}
            </aside>
          </div>

          {/* Similar cafes */}
          {similar.length > 0 && (
            <section className="mt-10">
              <h2 className="mb-5 text-lg font-bold text-gray-900">{t("similarCafes")}</h2>
              <div className="grid grid-cols-2 gap-4 sm:grid-cols-4">
                {similar.map((c) => (
                  <CafeCard key={c.id} cafe={c} locale={locale} href={`/${locale}/cafe/${c.slug}`} />
                ))}
              </div>
            </section>
          )}
        </div>
      </main>
      <Footer />
    </>
  );
}

function TagRow({ label, tags, color }: { label: string; tags: string[]; color: string }) {
  const colorMap: Record<string, string> = {
    brand:  "bg-brand-50 text-brand-700",
    purple: "bg-purple-50 text-purple-700",
    amber:  "bg-amber-50 text-amber-700",
    gray:   "bg-gray-100 text-gray-600",
  };
  return (
    <div>
      <p className="mb-1.5 text-xs font-medium text-gray-400">{label}</p>
      <div className="flex flex-wrap gap-1.5">
        {tags.map((tag) => (
          <span key={tag} className={cn("rounded-full px-2.5 py-0.5 text-xs font-medium", colorMap[color] ?? colorMap.gray)}>
            {tag}
          </span>
        ))}
      </div>
    </div>
  );
}