export const dynamic = 'force-dynamic';
import { pb, type Diplomatenkennzeichen } from "@/lib/pb";

export const metadata = { title: "Diplomatenkennzeichen" };

const COUNTRY_NAMES: Record<string, string> = {
  germany: "Deutschland", austria: "Österreich",
  switzerland: "Schweiz", luxembourg: "Luxemburg",
};
const COUNTRY_FLAGS: Record<string, string> = {
  germany: "🇩🇪", austria: "🇦🇹", switzerland: "🇨🇭", luxembourg: "🇱🇺",
};
const TYPE_LABELS: Record<string, string> = {
  embassy: "Botschaft", consulate: "Konsulat", io: "Intern. Organisation",
};
const TYPE_COLORS: Record<string, string> = {
  embassy:   "bg-blue-50 text-blue-800 border-blue-200",
  consulate: "bg-amber-50 text-amber-800 border-amber-200",
  io:        "bg-emerald-50 text-emerald-800 border-emerald-200",
};

interface Props { searchParams: { land?: string } }

async function getData(baseCountry: string) {
  try {
    // Ohne sort um 400 zu vermeiden, sortieren wir client-side
    return pb.collection("diplomatenkennzeichen").getFullList<Diplomatenkennzeichen>({
      filter: `base_country="${baseCountry}"`,
    });
  } catch { return []; }
}

async function getAvailableCountries(): Promise<string[]> {
  try {
    const all = await pb.collection("diplomatenkennzeichen").getFullList<Diplomatenkennzeichen>({
      fields: "base_country",
    });
    return [...new Set(all.map((i: any) => i.base_country).filter(Boolean))].sort() as string[];
  } catch { return ["germany"]; }
}

function sortByCode(a: Diplomatenkennzeichen, b: Diplomatenkennzeichen) {
  const parseCode = (c: string) => {
    const m = c.match(/^(?:0-)?(\d+)$/);
    return m ? parseInt(m[1]) : -1;
  };
  const na = parseCode(a.code);
  const nb = parseCode(b.code);
  if (na >= 0 && nb >= 0) return na - nb;
  if (na >= 0) return -1;
  if (nb >= 0) return 1;
  return a.code.localeCompare(b.code);
}

export default async function DiplomatenPage({ searchParams }: Props) {
  const countries = await getAvailableCountries();
  const activeLand = searchParams.land ?? countries[0] ?? "germany";
  const rawItems = await getData(activeLand);
  const items = [...rawItems].sort(sortByCode);

  const grouped = items.reduce<Record<string, Diplomatenkennzeichen[]>>((acc, item) => {
    const t = item.type ?? "embassy";
    if (!acc[t]) acc[t] = [];
    acc[t].push(item);
    return acc;
  }, {});

  return (
    <div className="max-w-6xl mx-auto px-6 py-12">
      <div className="mb-8">
        <div className="text-xs font-mono text-[var(--muted)] tracking-widest uppercase mb-2">Datenbank</div>
        <h1 style={{ fontFamily: "'Syne',sans-serif", fontWeight: 800, fontSize: "2.25rem", letterSpacing: "-0.03em" }}
            className="text-[var(--ink)]">Diplomatenkennzeichen</h1>
        <p className="text-[var(--muted)] mt-2 max-w-2xl">
          Sonderkennzeichen für Botschaften, Konsulate und internationale Organisationen.
        </p>
      </div>

      {/* Länder-Tabs */}
      <div className="flex gap-2 flex-wrap mb-8">
        {countries.map(c => (
          <a key={c} href={`?land=${c}`}
             className={`flex items-center gap-2 px-4 py-2 rounded-lg border text-sm transition-colors ${
               c === activeLand
                 ? "bg-[var(--ink)] text-[var(--paper)] border-[var(--ink)]"
                 : "border-[var(--warm)] text-[var(--muted)] hover:border-[var(--ink)] hover:text-[var(--ink)]"
             }`}
             style={{ fontFamily: "'Syne',sans-serif", fontWeight: 500 }}>
            <span>{COUNTRY_FLAGS[c] ?? "🌍"}</span>
            <span>{COUNTRY_NAMES[c] ?? c}</span>
          </a>
        ))}
      </div>

      <div className="mb-6 flex gap-3 flex-wrap">
        {Object.entries(TYPE_LABELS).map(([key, label]) => (
          <span key={key} className={`px-2.5 py-1 rounded border text-xs font-medium ${TYPE_COLORS[key]}`}>
            {label}: {grouped[key]?.length ?? 0}
          </span>
        ))}
        <span className="text-sm text-[var(--muted)] self-center">— {items.length} Einträge gesamt</span>
      </div>

      {items.length === 0 ? (
        <div className="text-center py-20 text-[var(--muted)]">Keine Daten für dieses Land.</div>
      ) : (
        Object.entries(TYPE_LABELS).map(([type, typeLabel]) => {
          const entries = grouped[type];
          if (!entries?.length) return null;
          return (
            <div key={type} className="mb-10">
              <h2 className="text-base mb-3 flex items-center gap-2"
                  style={{ fontFamily: "'Syne',sans-serif", fontWeight: 700 }}>
                <span className={`px-2.5 py-0.5 rounded border text-xs ${TYPE_COLORS[type]}`}>{typeLabel}</span>
                <span className="text-[var(--muted)] text-sm font-normal">{entries.length} Einträge</span>
              </h2>
              <div className="border border-[var(--warm)] rounded-lg overflow-hidden bg-white/40">
                <div className="overflow-x-auto">
                  <table className="data-table">
                    <thead>
                      <tr>
                        <th>Kürzel</th>
                        <th>Land / Organisation</th>
                        <th className="hidden md:table-cell">Stadt</th>
                        <th className="hidden lg:table-cell">Bemerkung</th>
                      </tr>
                    </thead>
                    <tbody>
                      {entries.map((d) => (
                        <tr key={d.id}>
                          <td><span className="kz-badge font-mono text-xs">{d.code}</span></td>
                          <td>
                            <div className="font-medium text-sm">{d.country}</div>
                            {d.organisation && <div className="text-xs text-[var(--muted)]">{d.organisation}</div>}
                          </td>
                          <td className="text-sm text-[var(--muted)] hidden md:table-cell">{d.city}</td>
                          <td className="text-sm text-[var(--muted)] hidden lg:table-cell">{d.note}</td>
                        </tr>
                      ))}
                    </tbody>
                  </table>
                </div>
              </div>
            </div>
          );
        })
      )}

      <div className="mt-8 p-5 border border-dashed border-[var(--warm)] rounded-lg text-center">
        <p className="text-sm text-[var(--muted)] mb-2">Daten unvollständig oder fehlerhaft?</p>
        <a href="https://git.denode.eu/denode/plates" target="_blank" rel="noopener"
           className="text-sm text-[var(--accent)] hover:underline font-medium">
          git.denode.eu/denode/plates →
        </a>
      </div>
    </div>
  );
}