import type { Metadata } from 'next';
import Link from 'next/link';
import { notFound } from 'next/navigation';
import { feeScheduleFor } from '@rareindex/valuation';
import { PageHeader } from '@/components/ui/page-header';
import { Card, CardHeader, EmptyState, StatStrip } from '@/components/ui/primitives';
import { LotsIntelCards, LotsIntelTable } from '@/components/market/lots-table';
import { SalesCards, SalesTable } from '@/components/market/sales-table';
import { FeeScheduleTable, FeeConfidenceBadge } from '@/components/market/fee-schedule';
import { getAuctionHouseStats, listAuctionHouses, listHouseResults, listLots } from '@/lib/queries/market-lists';
import { resolveHouse } from '@/lib/auction-house';
import { fmtMoney, fmtNum, fmtPct, fmtRelative } from '@/lib/format';

export const revalidate = 300;

export async function generateMetadata({ params }: { params: Promise<{ slug: string }> }): Promise<Metadata> {
  const { slug } = await params;
  const h = resolveHouse(slug, await listAuctionHouses());
  return h ? { title: `${h.house} — auctions, results & buyer's premium`, description: `${h.house} on RareIndex: open lots with all-in cost vs RIV, recorded results and the buyer's premium schedule used for all-in estimates.` } : { title: 'Auction house' };
}

export default async function AuctionHousePage({ params }: { params: Promise<{ slug: string }> }) {
  const { slug } = await params;
  const houses = await listAuctionHouses();
  const h = resolveHouse(slug, houses);
  if (!h) notFound();
  const [stats, lots, results] = await Promise.all([getAuctionHouseStats(h.house), listLots({ house: h.house, open: true, limit: 60, sort: 'ending' }), listHouseResults(h.house, 50)]);
  const schedule = feeScheduleFor(h.house);
  return (
    <div>
      <PageHeader
        kicker="Auction house"
        crumbs={[{ label: 'Auctions', href: '/auctions' }, { label: h.house }]}
        title={h.house}
        description="Objective metrics only (§129): lots tracked, results recorded, median and record all-in sale, and the buyer's premium schedule RareIndex uses to turn hammer prices into buyer-pays costs. Sell-through is shown only when the house's results are recorded per lot."
        compact
        meta={
          <>
            <Link href={`/auctions?house=${encodeURIComponent(h.house)}`} className="hover:text-fg">
              Open lots →
            </Link>
            <Link href={`/auctions/calendar?house=${encodeURIComponent(h.house)}`} className="hover:text-fg">
              Calendar →
            </Link>
          </>
        }
      />
      <StatStrip
        className="mb-4"
        items={[
          { label: 'Open lots', value: fmtNum(stats?.openLots ?? h.upcoming), sub: stats ? `${fmtNum(stats.liveLots)} live · ${fmtNum(stats.lotsWithBids)} with bids` : undefined },
          { label: 'Below RIV', value: stats?.lotsAssessed ? fmtNum(stats.lotsBelowRiv) : '—', sub: stats?.lotsAssessed ? `of ${fmtNum(stats.lotsAssessed)} assessed` : 'not assessed yet' },
          { label: 'Results recorded', value: fmtNum(stats?.results ?? 0), sub: stats?.lastResultAt ? `last ${fmtRelative(stats.lastResultAt)}` : undefined },
          { label: 'Median all-in · 1Y', value: stats?.medianAllInUsd365d !== null && stats?.medianAllInUsd365d !== undefined ? fmtMoney(stats.medianAllInUsd365d) : '—', sub: stats?.results365d ? `${fmtNum(stats.results365d)} results` : 'no result in 12 months' },
          { label: 'Record all-in · 1Y', value: stats?.maxAllInUsd365d !== null && stats?.maxAllInUsd365d !== undefined ? fmtMoney(stats.maxAllInUsd365d) : '—' },
          { label: 'Sell-through', value: stats?.sellThrough !== null && stats?.sellThrough !== undefined ? fmtPct(stats.sellThrough, 0, false) : '—', sub: stats?.sellThrough !== null && stats?.sellThrough !== undefined ? 'lots sold / lots ended' : 'not derivable from this source' },
        ]}
      />
      <div className="grid gap-4 xl:grid-cols-[2fr_1fr]">
        <div className="space-y-4">
          <Card className="overflow-hidden">
            <CardHeader title="Open lots" subtitle="All-in = hammer + buyer's premium (schedule below); bid vs RIV gated like listings." action={<Link href={`/auctions?house=${encodeURIComponent(h.house)}`} className="text-muted hover:text-fg">All →</Link>} />
            <div className="md:hidden">
              <LotsIntelCards items={lots} />
              {!lots.length ? <EmptyState title="No open lots" compact /> : null}
            </div>
            <div className="hidden md:block">
              <LotsIntelTable items={lots} showHouse={false} emptyTitle="No open lots" emptyDescription="This house has no live or upcoming lot tracked right now." />
            </div>
          </Card>
          <Card className="overflow-hidden">
            <CardHeader title="Recent results" subtitle={stats?.estimatedPremiumShare !== null && stats?.estimatedPremiumShare !== undefined ? `Recorded sales from this house. Premium estimated on ${fmtPct(stats.estimatedPremiumShare, 0, false)} of results with a fee basis; the rest report the premium as included or none.` : 'Recorded sales from this house; fee basis appears once the fees worker has run.'} />
            <div className="md:hidden">
              <SalesCards items={results} />
            </div>
            <div className="hidden md:block">
              <SalesTable items={results} />
            </div>
            {!results.length ? <EmptyState title="No results recorded" description="Results flow into Sales once a result connector runs for this house." compact /> : null}
          </Card>
        </div>
        <Card className="overflow-hidden">
          <CardHeader title="Buyer's premium" subtitle="Used to compute all-in costs (§35)" />
          <div className="p-4">
            {schedule ? (
              <FeeScheduleTable schedule={schedule} />
            ) : (
              <div className="space-y-2 text-[12px] text-muted">
                <FeeConfidenceBadge confidence="default" />
                <p>No schedule on file for this house. When a result is recorded as hammer-only, RareIndex adds a default 22 % premium and labels the all-in figure “premium added (default)”; when the connector does not state whether the premium is included, the price is shown as recorded with “fees unknown”.</p>
                <p className="text-subtle">
                  Schedules live in <code className="mono-num">data/fees/auction-houses.json</code> — see the <Link href="/methodology#fees" className="underline-offset-2 hover:underline">methodology</Link>.
                </p>
              </div>
            )}
          </div>
        </Card>
      </div>
    </div>
  );
}