import { useInfiniteQuery, useQuery } from "@tanstack/react-query"
import { eventsApi, EventDto } from "@/services/events"

const EVENTS_LIMIT = 20

export function useEvents(date?: string | null) {
  return useInfiniteQuery({
    queryKey: ["events", date],
    queryFn: ({ pageParam }) => eventsApi.getEvents({ 
      limit: EVENTS_LIMIT,
      cursor: pageParam,
      date: date || undefined
    }),
    initialPageParam: undefined as string | undefined,
    getNextPageParam: (lastPage) => lastPage.nextCursor,
    staleTime: 5 * 60 * 1000, // 5 minutes
  })
}

export function useAllEvents(date?: string | null): {
  events: EventDto[]
  isLoading: boolean
  isError: boolean
  error: Error | null
  hasNextPage: boolean
  fetchNextPage: () => void
  isFetchingNextPage: boolean
} {
  const {
    data,
    isLoading,
    isError,
    error,
    hasNextPage,
    fetchNextPage,
    isFetchingNextPage,
  } = useEvents(date)

  const events = data?.pages.flatMap(page => page.data) ?? []

  return {
    events,
    isLoading,
    isError,
    error,
    hasNextPage: hasNextPage ?? false,
    fetchNextPage,
    isFetchingNextPage,
  }
}

export function useEvent(eventId: string) {
  return useQuery({
    queryKey: ["event", eventId],
    queryFn: () => eventsApi.getEventById(eventId),
    staleTime: 5 * 60 * 1000, // 5 minutes
    enabled: !!eventId, // Only run query if eventId is provided
  })
}