import { useQuery } from '@tanstack/react-query';
import { SKATE_SPOT_KIND, parseSkateSpot, type SkateSpot } from '@/lib/types';
import { useSkateRelays } from '@/hooks/useSkateRelays';
import { cacheSpots, getAllCachedSpots, isOffline } from '@/lib/offlineCache';

export function useSkateSpots(limit = 100) {
  const { querySkateContent, getQueryKeySuffix } = useSkateRelays();

  return useQuery({
    queryKey: ['skate-spots', limit, getQueryKeySuffix()],
    queryFn: async () => {
      // If offline, return cached spots
      if (isOffline()) {
        console.log('[useSkateSpots] Offline, returning cached spots');
        const cachedSpots = await getAllCachedSpots();
        return cachedSpots.sort((a, b) => b.createdAt - a.createdAt).slice(0, limit);
      }

      const signal = AbortSignal.timeout(30000);

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

      const spots: SkateSpot[] = [];
      const spotsWithEvents: Array<{ event: typeof events[0]; spot: SkateSpot }> = [];
      
      for (const event of events) {
        const spot = parseSkateSpot(event);
        if (spot) {
          spots.push(spot);
          spotsWithEvents.push({ event, spot });
        } else {
          console.warn('[useSkateSpots] Failed to parse event:', event);
        }
      }

      console.log('[useSkateSpots] Parsed spots:', spots.length);

      // Cache spots in the background for offline use
      if (spotsWithEvents.length > 0) {
        cacheSpots(spotsWithEvents).catch(err => 
          console.warn('[useSkateSpots] Failed to cache spots:', err)
        );
      }

      // Sort by created_at descending
      return spots.sort((a, b) => b.createdAt - a.createdAt);
    },
    staleTime: 30000,
    gcTime: 300000,
    refetchOnMount: 'always',
  });
}

export function useSkateSpot(identifier: string, pubkey?: string) {
  const { querySkateContent, getQueryKeySuffix } = useSkateRelays();

  return useQuery({
    queryKey: ['skate-spot', identifier, pubkey, getQueryKeySuffix()],
    queryFn: async () => {
      // If offline, try to get from cache first
      if (isOffline() && pubkey) {
        console.log('[useSkateSpot] Offline, checking cache');
        const { getCachedSpot } = await import('@/lib/offlineCache');
        const cached = await getCachedSpot(pubkey, identifier);
        if (cached) {
          console.log('[useSkateSpot] Found in cache:', identifier);
          return cached;
        }
      }

      const signal = AbortSignal.timeout(30000);

      const filter: {
        kinds: number[];
        '#d': string[];
        authors?: string[];
        limit: number;
      } = {
        kinds: [SKATE_SPOT_KIND],
        '#d': [identifier],
        limit: 1,
      };

      if (pubkey) {
        filter.authors = [pubkey];
      }

      const events = await querySkateContent([filter], { signal });

      if (events.length === 0) {
        console.warn(`[useSkateSpot] No events found for identifier: ${identifier}`);
        return null;
      }

      const spot = parseSkateSpot(events[0]);
      
      // Cache the spot for offline use
      if (spot) {
        const { cacheSpot } = await import('@/lib/offlineCache');
        cacheSpot(events[0], spot).catch(err => 
          console.warn('[useSkateSpot] Failed to cache spot:', err)
        );
      }

      return spot;
    },
    enabled: !!identifier,
    staleTime: 30000,
    refetchOnMount: 'always',
  });
}

export function useUserSkateSpots(pubkey: string) {
  const { querySkateContent, getQueryKeySuffix } = useSkateRelays();

  return useQuery({
    queryKey: ['user-skate-spots', pubkey, getQueryKeySuffix()],
    queryFn: async () => {
      const signal = AbortSignal.timeout(30000);

      const events = await querySkateContent(
        [
          {
            kinds: [SKATE_SPOT_KIND],
            authors: [pubkey],
            '#t': ['skatespot'],
            limit: 50,
          },
        ],
        { signal }
      );

      const spots: SkateSpot[] = [];
      for (const event of events) {
        const spot = parseSkateSpot(event);
        if (spot) spots.push(spot);
      }

      return spots.sort((a, b) => b.createdAt - a.createdAt);
    },
    enabled: !!pubkey,
    staleTime: 30000,
    refetchOnMount: 'always',
  });
}