import { useQuery } from '@tanstack/react-query';
import { SKATE_SKATER_KIND, SKATER_TAG, parseSkater, type Skater } from '@/lib/types';
import { useSkateRelays } from '@/hooks/useSkateRelays';
import { useAdminModeration, filterAdminHidden } from '@/hooks/useAdminModeration';

const SKATER_D = 'skater-profile';

/**
 * List all SkateSpots skater profiles (kind 35000, tagged skateskater).
 * Queried from the skate relays only — this is the anti-spam boundary:
 * plain kind-0 Nostr profiles never appear here, only opted-in app skaters.
 * Deduplicated per author (newest wins), newest-first.
 */
export function useSkaters(limit = 200) {
  const { querySkateContent, getQueryKeySuffix } = useSkateRelays();
  const hidden = useAdminModeration();

  return useQuery({
    queryKey: ['skaters', limit, getQueryKeySuffix()],
    select: (skaters: Skater[]) => filterAdminHidden(skaters, SKATE_SKATER_KIND, hidden),
    queryFn: async () => {
      const signal = AbortSignal.timeout(10000);

      const events = await querySkateContent(
        [{ kinds: [SKATE_SKATER_KIND], '#t': [SKATER_TAG], limit }],
        { signal },
      );

      // Deduplicate: keep the newest profile per author.
      const byAuthor = new Map<string, Skater>();
      for (const event of events) {
        const s = parseSkater(event);
        if (!s) continue;
        const existing = byAuthor.get(s.pubkey);
        if (!existing || s.createdAt > existing.createdAt) byAuthor.set(s.pubkey, s);
      }

      return [...byAuthor.values()].sort((a, b) => b.createdAt - a.createdAt);
    },
    staleTime: 30000,
    refetchOnMount: 'always',
  });
}

/** Fetch a single user's skater profile (or null). */
export function useUserSkaterProfile(pubkey: string | undefined) {
  const { querySkateContent, getQueryKeySuffix } = useSkateRelays();

  return useQuery({
    queryKey: ['skater-profile', pubkey, getQueryKeySuffix()],
    enabled: !!pubkey,
    queryFn: async () => {
      if (!pubkey) return null;
      const signal = AbortSignal.timeout(10000);
      const events = await querySkateContent(
        [{ kinds: [SKATE_SKATER_KIND], authors: [pubkey], '#d': [SKATER_D], limit: 1 }],
        { signal },
      );
      if (events.length === 0) return null;
      return parseSkater(events[0]);
    },
    staleTime: 30000,
    refetchOnMount: 'always',
  });
}

export { SKATER_D };