import { useQuery } from '@tanstack/react-query';
import { CALENDAR_EVENT_KIND, parseSkateEvent, isFeaturedActive, type SkateEvent } from '@/lib/types';
import { useSkateRelays } from '@/hooks/useSkateRelays';
import { useAdminModeration, filterAdminHidden } from '@/hooks/useAdminModeration';
import { verifiedFeaturedCoords } from '@/lib/featuredVerification';

export function useSkateEvents(limit = 50, options: { includeHidden?: boolean } = {}) {
  const { includeHidden = false } = options;
  const { querySkateContent, getQueryKeySuffix } = useSkateRelays();
  const hidden = useAdminModeration();

  return useQuery({
    queryKey: ['skate-events', limit, getQueryKeySuffix()],
    // `includeHidden`: admin tooling only (review queue + undo).
    select: (events: SkateEvent[]) =>
      includeHidden ? events : filterAdminHidden(events, CALENDAR_EVENT_KIND, hidden),
    queryFn: async () => {
      const signal = AbortSignal.timeout(15000);

      const events = await querySkateContent(
        [
          {
            kinds: [CALENDAR_EVENT_KIND],
            '#t': ['skateboarding'],
            limit,
          },
        ],
        { signal, requireAny: true }
      );

      const skateEvents: SkateEvent[] = [];
      for (const event of events) {
        const skateEvent = parseSkateEvent(event);
        if (skateEvent) skateEvents.push(skateEvent);
      }

      // Verified/paid featured first, then soonest start time.
      const coordOf = (ev: SkateEvent) => `${CALENDAR_EVENT_KIND}:${ev.pubkey}:${ev.identifier}`;
      const featuredCoords = skateEvents.filter((ev) => isFeaturedActive(ev.featuredUntil)).map(coordOf);
      const verified = await verifiedFeaturedCoords(featuredCoords, (f) => querySkateContent([f], { signal }));
      const isPro = (ev: SkateEvent) =>
        isFeaturedActive(ev.featuredUntil) && (verified === null || verified.has(coordOf(ev)));

      return skateEvents.sort((a, b) => {
        const aF = isPro(a) ? 1 : 0;
        const bF = isPro(b) ? 1 : 0;
        if (aF !== bF) return bF - aF;
        return a.start - b.start;
      });
    },
    staleTime: 60000,
  });
}

export function useUpcomingSkateEvents(limit = 20, options: { enabled?: boolean } = {}) {
  const { enabled = true } = options;
  const { querySkateContent, getQueryKeySuffix } = useSkateRelays();
  const hidden = useAdminModeration();
  const now = Math.floor(Date.now() / 1000);

  return useQuery({
    queryKey: ['upcoming-skate-events', limit, getQueryKeySuffix()],
    enabled,
    select: (events: SkateEvent[]) => filterAdminHidden(events, CALENDAR_EVENT_KIND, hidden),
    queryFn: async () => {
      const signal = AbortSignal.timeout(15000);

      const events = await querySkateContent(
        [
          {
            kinds: [CALENDAR_EVENT_KIND],
            '#t': ['skateboarding'],
            limit: limit * 2, // Fetch more to filter
          },
        ],
        { signal }
      );

      const skateEvents: SkateEvent[] = [];
      for (const event of events) {
        const skateEvent = parseSkateEvent(event);
        // Only include future events
        if (skateEvent && skateEvent.start >= now) {
          skateEvents.push(skateEvent);
        }
      }

      // Verified/paid featured first, then soonest start time.
      const coordOf = (ev: SkateEvent) => `${CALENDAR_EVENT_KIND}:${ev.pubkey}:${ev.identifier}`;
      const featuredCoords = skateEvents.filter((ev) => isFeaturedActive(ev.featuredUntil)).map(coordOf);
      const verified = await verifiedFeaturedCoords(featuredCoords, (f) => querySkateContent([f], { signal }));
      const isPro = (ev: SkateEvent) =>
        isFeaturedActive(ev.featuredUntil) && (verified === null || verified.has(coordOf(ev)));

      return skateEvents
        .sort((a, b) => {
          const aF = isPro(a) ? 1 : 0;
          const bF = isPro(b) ? 1 : 0;
          if (aF !== bF) return bF - aF;
          return a.start - b.start;
        })
        .slice(0, limit);
    },
    staleTime: 60000,
  });
}

/** Events authored by one pubkey (profile page). Upcoming first, then recent. */
export function useUserEvents(pubkey: string | undefined) {
  const { querySkateContent, getQueryKeySuffix } = useSkateRelays();
  const hidden = useAdminModeration();

  return useQuery({
    queryKey: ['user-skate-events', pubkey, getQueryKeySuffix()],
    enabled: !!pubkey,
    select: (events: SkateEvent[]) => filterAdminHidden(events, CALENDAR_EVENT_KIND, hidden),
    queryFn: async () => {
      if (!pubkey) return [];
      const signal = AbortSignal.timeout(12000);
      const events = await querySkateContent(
        [{
          kinds: [CALENDAR_EVENT_KIND],
          authors: [pubkey],
          '#t': ['skateboarding'],
          limit: 50,
        }],
        { signal },
      );
      const now = Math.floor(Date.now() / 1000);
      return events
        .map(parseSkateEvent)
        .filter((event): event is SkateEvent => !!event)
        .sort((a, b) => {
          const aUpcoming = a.start >= now;
          const bUpcoming = b.start >= now;
          if (aUpcoming !== bUpcoming) return aUpcoming ? -1 : 1;
          return aUpcoming ? a.start - b.start : b.start - a.start;
        });
    },
    staleTime: 60_000,
  });
}

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

  return useQuery({
    queryKey: ['skate-event', identifier, pubkey, getQueryKeySuffix()],
    select: (evt: SkateEvent | null) =>
      evt && hidden.has({ coord: `${CALENDAR_EVENT_KIND}:${evt.pubkey}:${evt.identifier}`, id: evt.id })
        ? null
        : evt,
    queryFn: async () => {
      const signal = AbortSignal.timeout(10000);

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

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

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

      if (events.length === 0) return null;

      return parseSkateEvent(events[0]);
    },
    enabled: !!identifier,
    staleTime: 60000,
  });
}