import { useMemo } from 'react';
import { useSpotReports } from '@/hooks/useSpotReports';
import { useBatchSpotPhotos } from '@/hooks/useSpotContributions';
import { useBatchSpotStatus } from '@/hooks/useSpotStatus';

/**
 * A spot is auto-hidden pending human review when this many DISTINCT accounts
 * have reported it "not a skate spot" AND it has NO community signals at all
 * (no community photo, no status report).
 *
 * The "no community signals" clause is the anti-brigade guard: any real spot
 * that a skater has engaged with is left to a human instead. It is fully
 * reversible — a community photo/status (or an admin `cleared`/`verified`
 * verdict) brings it straight back.
 */
export const AUTO_HIDE_REPORT_THRESHOLD = 3;

export function useAutoHiddenSpots(
  spots: Array<{ id: string; pubkey: string; identifier: string }>,
) {
  const reports = useSpotReports(spots);
  const photos = useBatchSpotPhotos(spots);
  const status = useBatchSpotStatus(spots);

  const autoHiddenIds = useMemo(() => {
    const set = new Set<string>();
    for (const s of spots) {
      if (reports.getCounts(s.id).reporters < AUTO_HIDE_REPORT_THRESHOLD) continue;
      const hasPhoto = photos.getCommunityPhotoCount(s.pubkey, s.identifier) > 0;
      const hasStatus = (status.getStatus(s.pubkey, s.identifier)?.reporterCount ?? 0) > 0;
      if (hasPhoto || hasStatus) continue;
      set.add(s.id);
    }
    return set;
  }, [spots, reports, photos, status]);

  return {
    autoHiddenIds,
    isAutoHidden: (id: string) => autoHiddenIds.has(id),
  };
}