import type { Metadata } from "next";
import Link from "next/link";
import Image from "next/image";
import { getServerSession } from "next-auth";
import { authOptions } from "@/lib/auth";
import { tripService } from "@/server/services/trip.service";
import { profileRepo } from "@/server/repositories/profile.repo";
import { TripCard } from "@/features/trip/components/trip-card";
import { siteConfig, siteUrl, absoluteUrl } from "@/lib/site";
import { ACTIVITY_CATEGORIES, categoryMeta } from "@/lib/activity-category";
import {
  Compass,
  Flame,
  Mountain,
  Handshake,
  Tent,
  Plus,
  type LucideIcon,
} from "lucide-react";

type OpenTrip = Awaited<ReturnType<typeof tripService.getOpenTrips>>[number];

function mapParticipants(trip: OpenTrip) {
  return trip.participants.map((p) => ({
    id: p.id,
    name: p.user.name,
    image: p.user.image,
    interests: p.user.profile?.interests ?? [],
  }));
}

export const metadata: Metadata = {
  title: "Cari Teman Trip & Aktivitas — Pergi Bareng, Bukan Sendiri",
  description: `${siteConfig.slogan} ${siteConfig.description}`,
  alternates: { canonical: "/" },
  openGraph: {
    title: `${siteConfig.name} — Cari Teman Trip & Aktivitas, Gabung Bareng`,
    description: siteConfig.slogan,
    url: "/",
  },
};

export default async function HomePage() {
  const session = await getServerSession(authOptions);
  const [trips, viewerProfile] = await Promise.all([
    tripService.getOpenTrips(),
    session?.user?.id
      ? profileRepo.findByUserId(session.user.id)
      : Promise.resolve(null),
  ]);
  const viewerInterests = viewerProfile?.interests ?? [];

  const now = new Date();
  const nextWeek = new Date(now.getTime() + 7 * 24 * 60 * 60 * 1000);

  // Social proof: total orang yang sudah gabung di seluruh open trip.
  const joinerCount = trips.reduce((sum, t) => sum + t._count.participants, 0);

  const upcomingTrips = trips
    .filter((t) => new Date(t.date) <= nextWeek)
    .slice(0, 3);

  const upcomingIds = new Set(upcomingTrips.map((t) => t.id));

  const latestTrips = trips
    .filter((t) => !upcomingIds.has(t.id))
    .slice(0, 6);

  const shownIds = new Set([...upcomingIds, ...latestTrips.map((t) => t.id)]);

  // Section sosial: trip yang paling ramai joiner-nya (social proof, bukan price proof).
  const buzzingTrips = trips
    .filter((t) => !shownIds.has(t.id) && t._count.participants > 0)
    .sort((a, b) => b._count.participants - a._count.participants)
    .slice(0, 3);

  const orgJsonLd = {
    "@context": "https://schema.org",
    "@graph": [
      {
        "@type": "Organization",
        "@id": `${siteUrl}/#organization`,
        name: siteConfig.name,
        url: siteUrl,
        logo: absoluteUrl("/images/SeTrip.png"),
        slogan: siteConfig.slogan,
        description: siteConfig.description,
      },
      {
        "@type": "WebSite",
        "@id": `${siteUrl}/#website`,
        url: siteUrl,
        name: siteConfig.name,
        description: siteConfig.description,
        publisher: { "@id": `${siteUrl}/#organization` },
        inLanguage: "id-ID",
        potentialAction: {
          "@type": "SearchAction",
          target: `${siteUrl}/trips?q={search_term_string}`,
          "query-input": "required name=search_term_string",
        },
      },
    ],
  };

  return (
    <div className="relative min-h-screen bg-neutral-50">
      <script
        type="application/ld+json"
        dangerouslySetInnerHTML={{ __html: JSON.stringify(orgJsonLd) }}
      />
      {/* ========== HERO ========== */}
      <section className="relative overflow-hidden bg-neutral-900">
        {/* Logo background full */}
        <Image
          src="/images/SeTrip.png"
          alt=""
          fill
          className="object-cover opacity-10 brightness-150"
          priority
        />
        <div className="absolute inset-0 bg-linear-to-br from-neutral-900/90 to-primary-900/80" />

        <div className="relative mx-auto max-w-4xl px-4 pb-10 pt-8 text-center sm:pb-14 sm:pt-12 lg:pb-16 lg:pt-14">
          {/* Brand badge */}
          <div className="mb-4 inline-flex items-center gap-1.5 rounded-full border border-primary-400/30 bg-primary-600/20 px-3 py-1 sm:mb-6 sm:gap-2 sm:px-4 sm:py-1.5">
            <Handshake
              size={14}
              strokeWidth={1.75}
              aria-hidden
              className="text-primary-300"
            />
            <span className="text-xs font-medium text-primary-300 sm:text-sm">
              Cari teman trip & aktivitas
            </span>
          </div>

          <h1 className="mb-3 text-3xl font-extrabold leading-tight tracking-tight text-white sm:mb-4 sm:text-4xl lg:text-5xl">
            Pergi bareng,{" "}
            <span className="text-primary-400">bukan sendiri</span>
          </h1>

          <p className="mx-auto mb-2 max-w-sm text-base font-medium text-neutral-300 sm:mb-3 sm:max-w-lg sm:text-lg">
            Lagi pengen jalan tapi gak punya teman?{" "}
            <span className="text-primary-400">SeTrip</span> tempatnya.
          </p>
          <p className="mx-auto mb-6 max-w-xs text-sm text-neutral-400 sm:mb-8 sm:max-w-md sm:text-base">
            Gabung open trip — hiking, camping, snorkeling, sampai city trip.
            Ketemu orang baru, dari stranger jadi travel buddies. Grup kecil,
            organizer terverifikasi.
          </p>

          <Link
            href="/trips"
            className="inline-block rounded-xl bg-primary-600 px-6 py-2.5 text-sm font-semibold text-white shadow-lg shadow-primary-600/25 transition-all hover:bg-primary-500 hover:scale-105 active:scale-95 sm:px-8 sm:py-3 sm:text-base"
          >
            Cari Teman Trip
          </Link>

          {/* Stats */}
          <div className="mt-8 flex justify-center gap-6 sm:mt-10 sm:gap-10 lg:gap-12">
            <div>
              <p className="text-xl font-bold text-primary-400 sm:text-2xl">
                {trips.length}
              </p>
              <p className="text-[11px] text-neutral-400 sm:text-xs">Trip Tersedia</p>
            </div>
            <div className="h-8 w-px bg-neutral-700 sm:h-10" />
            <div>
              <p className="text-xl font-bold text-white sm:text-2xl">
                {joinerCount}
              </p>
              <p className="text-[11px] text-neutral-400 sm:text-xs">
                Sudah Gabung
              </p>
            </div>
          </div>
        </div>
      </section>

      {/* ========== CONTENT ========== */}
      <div className="mx-auto max-w-6xl px-4 py-6 space-y-8 sm:py-8 sm:space-y-10 lg:py-10 lg:space-y-12">
        {/* Jelajah per kategori */}
        <section>
          <SectionHeading
            icon={Compass}
            title="Jelajah per Kategori"
            subtitle="Hiking, diving, konser, sampai retreat"
          />
          <div className="flex flex-wrap gap-2">
            {ACTIVITY_CATEGORIES.map((c) => {
              const m = categoryMeta(c);
              return (
                <Link
                  key={c}
                  href={`/trips?category=${c}`}
                  className="inline-flex items-center gap-1.5 rounded-full border border-neutral-200 bg-white px-3 py-1.5 text-xs font-medium text-neutral-700 transition-colors hover:border-primary-300 hover:bg-primary-50 hover:text-primary-700"
                >
                  <span>{m.icon}</span>
                  <span>{m.label}</span>
                </Link>
              );
            })}
          </div>
        </section>

        {/* Trip Terdekat */}
        {upcomingTrips.length > 0 && (
          <section>
            <SectionHeading
              icon={Flame}
              title="Trip Terdekat"
              subtitle="Berangkat dalam 7 hari ke depan"
            />
            <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-3">
              {upcomingTrips.slice(0, 3).map((trip, i) => (
                <TripCard
                  key={trip.id}
                  id={trip.id}
                  title={trip.title}
                  category={trip.category}
                  vibe={trip.vibe}
                  destination={trip.destination}
                  location={trip.location}
                  date={trip.date}
                  endDate={trip.endDate}
                  price={trip.price}
                  maxParticipants={trip.maxParticipants}
                  participantCount={trip._count.participants}
                  organizerName={trip.organizer.name}
                  status={trip.status}
                  coverImage={trip.images[0]?.url}
                  isVerifiedOrganizer={
                    trip.organizer.organizerVerification?.status === "APPROVED"
                  }
                  participants={mapParticipants(trip)}
                  viewerInterests={viewerInterests}
                  priority={i === 0}
                />
              ))}
            </div>
          </section>
        )}

        {/* Open Trip */}
        <section>
          <SectionHeading
            icon={Mountain}
            title="Open Trip"
            subtitle="Pilih trip, ketemu teman baru"
            action={
              <Link
                href="/trips"
                className="shrink-0 rounded-lg bg-secondary-50 px-2.5 py-1 text-xs font-medium text-secondary-600 hover:bg-secondary-100 sm:px-3 sm:py-1.5 sm:text-sm"
              >
                Lihat semua
              </Link>
            }
          />

          {latestTrips.length === 0 ? (
            <div className="rounded-2xl border-2 border-dashed border-neutral-200 bg-white p-8 text-center sm:p-14">
              <div className="mx-auto mb-4 flex h-14 w-14 items-center justify-center rounded-full bg-primary-50 sm:h-16 sm:w-16">
                <Tent
                  size={26}
                  strokeWidth={1.75}
                  aria-hidden
                  className="text-primary-600"
                />
              </div>
              <p className="mb-1 text-base font-bold text-neutral-800 sm:text-lg">
                Belum ada trip tersedia
              </p>
              <p className="mb-5 text-sm text-neutral-500 sm:mb-6">
                Jadilah yang pertama buat open trip di sini!
              </p>
              <Link
                href="/create-trip"
                className="inline-block rounded-xl bg-primary-600 px-5 py-2.5 text-sm font-semibold text-white shadow-lg shadow-primary-600/25 hover:bg-primary-700"
              >
                + Buat Trip Baru
              </Link>
            </div>
          ) : (
            <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-3">
              {latestTrips.map((trip) => (
                <TripCard
                  key={trip.id}
                  id={trip.id}
                  title={trip.title}
                  category={trip.category}
                  vibe={trip.vibe}
                  destination={trip.destination}
                  location={trip.location}
                  date={trip.date}
                  endDate={trip.endDate}
                  price={trip.price}
                  maxParticipants={trip.maxParticipants}
                  participantCount={trip._count.participants}
                  organizerName={trip.organizer.name}
                  status={trip.status}
                  coverImage={trip.images[0]?.url}
                  isVerifiedOrganizer={
                    trip.organizer.organizerVerification?.status === "APPROVED"
                  }
                  participants={mapParticipants(trip)}
                  viewerInterests={viewerInterests}
                />
              ))}
            </div>
          )}
        </section>

        {/* Lagi Ramai — social proof, bukan price proof */}
        {buzzingTrips.length > 0 && (
          <section>
            <SectionHeading
              icon={Handshake}
              title="Lagi Ramai"
              subtitle="Banyak yang sudah gabung — kamu nggak bakal jalan sendirian"
            />
            <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-3">
              {buzzingTrips.map((trip) => (
                <TripCard
                  key={trip.id}
                  id={trip.id}
                  title={trip.title}
                  category={trip.category}
                  vibe={trip.vibe}
                  destination={trip.destination}
                  location={trip.location}
                  date={trip.date}
                  endDate={trip.endDate}
                  price={trip.price}
                  maxParticipants={trip.maxParticipants}
                  participantCount={trip._count.participants}
                  organizerName={trip.organizer.name}
                  status={trip.status}
                  coverImage={trip.images[0]?.url}
                  isVerifiedOrganizer={
                    trip.organizer.organizerVerification?.status === "APPROVED"
                  }
                  participants={mapParticipants(trip)}
                  viewerInterests={viewerInterests}
                />
              ))}
            </div>
          </section>
        )}

        {/* CTA Bottom */}
        <section className="overflow-hidden rounded-2xl bg-neutral-800 p-6 text-center sm:p-8 lg:p-12">
          <h2 className="mb-2 text-xl font-bold text-white sm:text-2xl">
            Dari stranger, jadi travel buddies.
          </h2>
          <p className="mx-auto mb-5 max-w-xs text-sm text-neutral-400 sm:mb-6 sm:max-w-sm sm:text-base">
            Buat trip dan kumpulin grup sendiri, atau gabung trip yang sudah
            jalan. Kenalan baru menunggu di puncak.
          </p>
          <div className="flex flex-col justify-center gap-2 sm:flex-row sm:gap-3">
            <Link
              href="/create-trip"
              className="rounded-xl bg-primary-600 px-6 py-2.5 text-sm font-semibold text-white shadow-lg shadow-primary-600/25 hover:bg-primary-500"
            >
              Buat Trip
            </Link>
            <Link
              href="/trips"
              className="rounded-xl border border-neutral-600 px-6 py-2.5 text-sm font-semibold text-neutral-300 hover:border-neutral-500 hover:text-white"
            >
              Cari Teman Trip
            </Link>
          </div>
        </section>
      </div>

      {/* ========== FAB ========== */}
      <Link
        href="/create-trip"
        className="fixed bottom-4 right-4 z-50 flex h-12 w-12 items-center justify-center rounded-full bg-primary-600 text-white shadow-xl shadow-primary-600/30 transition-all hover:scale-110 hover:bg-primary-500 active:scale-95 sm:bottom-6 sm:right-6 sm:h-14 sm:w-14"
        aria-label="Buat Trip"
      >
        <Plus size={24} strokeWidth={2} aria-hidden />
      </Link>
    </div>
  );
}

/** Heading section homepage — ikon stroke + judul, opsional aksi di kanan. */
function SectionHeading({
  icon: Icon,
  title,
  subtitle,
  action,
}: {
  icon: LucideIcon;
  title: string;
  subtitle?: string;
  action?: React.ReactNode;
}) {
  return (
    <div className="mb-4 flex items-center justify-between gap-3 sm:mb-5">
      <div className="flex items-center gap-2.5">
        <Icon
          size={22}
          strokeWidth={1.75}
          aria-hidden
          className="shrink-0 text-primary-600"
        />
        <div>
          <h2 className="text-base font-bold text-neutral-800 sm:text-lg">
            {title}
          </h2>
          {subtitle && (
            <p className="text-[11px] text-neutral-500 sm:text-xs">
              {subtitle}
            </p>
          )}
        </div>
      </div>
      {action}
    </div>
  );
}