import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query'
import type { UseQueryResult, UseMutationResult } from '@tanstack/react-query'
import { apiFetch, apiFetchVoid } from '../../api/client'
import { adaptSavedSearch } from '../../api/adapters'
import type { SavedSearch, SavedSearchDTO } from '../../api/adapters'

interface SavedSearchesResponse {
  saved_searches: SavedSearchDTO[]
}

export function useSavedSearches(): UseQueryResult<SavedSearch[]> {
  return useQuery({
    queryKey: ['saved-searches'],
    queryFn: async () => {
      const data = await apiFetch<SavedSearchesResponse>('/api/v1/saved-searches')
      return data.saved_searches.map(adaptSavedSearch)
    },
    staleTime: 30_000,
  })
}

export function useCreateSavedSearch(): UseMutationResult<SavedSearch, Error, { name: string; query: string }> {
  const queryClient = useQueryClient()
  return useMutation({
    mutationFn: async ({ name, query }) => {
      const dto = await apiFetch<SavedSearchDTO>('/api/v1/saved-searches', {
        method: 'POST',
        body: JSON.stringify({ name, query }),
        headers: { 'Content-Type': 'application/json' },
      })
      return adaptSavedSearch(dto)
    },
    onSuccess: () => {
      void queryClient.invalidateQueries({ queryKey: ['saved-searches'] })
    },
  })
}

export function useUpdateSavedSearch(): UseMutationResult<
  SavedSearch,
  Error,
  { oldName: string; name?: string; query?: string }
> {
  const queryClient = useQueryClient()
  return useMutation({
    mutationFn: async ({ oldName, name, query }) => {
      const body: Record<string, string> = {}
      if (name !== undefined) body['name'] = name
      if (query !== undefined) body['query'] = query

      const dto = await apiFetch<SavedSearchDTO>(
        `/api/v1/saved-searches/${encodeURIComponent(oldName)}`,
        {
          method: 'PUT',
          body: JSON.stringify(body),
          headers: { 'Content-Type': 'application/json' },
        },
      )
      return adaptSavedSearch(dto)
    },
    onSuccess: () => {
      void queryClient.invalidateQueries({ queryKey: ['saved-searches'] })
    },
  })
}

export function useDeleteSavedSearch(): UseMutationResult<void, Error, { name: string }> {
  const queryClient = useQueryClient()
  return useMutation({
    mutationFn: async ({ name }) => {
      await apiFetchVoid(`/api/v1/saved-searches/${encodeURIComponent(name)}`, {
        method: 'DELETE',
      })
    },
    onSuccess: () => {
      void queryClient.invalidateQueries({ queryKey: ['saved-searches'] })
    },
  })
}