import {AppBskyGraphGetFollowers} from '@atproto/api'
import {useInfiniteQuery, InfiniteData, QueryKey} from '@tanstack/react-query'

import {getAgent} from '#/state/session'
import {STALE} from '#/state/queries'

const PAGE_SIZE = 30
type RQPageParam = string | undefined

export const RQKEY = (did: string) => ['profile-followers', did]

export function useProfileFollowersQuery(did: string | undefined) {
  return useInfiniteQuery<
    AppBskyGraphGetFollowers.OutputSchema,
    Error,
    InfiniteData<AppBskyGraphGetFollowers.OutputSchema>,
    QueryKey,
    RQPageParam
  >({
    staleTime: STALE.MINUTES.FIVE,
    queryKey: RQKEY(did || ''),
    async queryFn({pageParam}: {pageParam: RQPageParam}) {
      const res = await getAgent().app.bsky.graph.getFollowers({
        actor: did || '',
        limit: PAGE_SIZE,
        cursor: pageParam,
      })
      return res.data
    },
    initialPageParam: undefined,
    getNextPageParam: lastPage => lastPage.cursor,
    enabled: !!did,
  })
}