"use client";

import { useQuery } from "@tanstack/react-query";
import { api } from "@/lib/api";
import { useAuthContext } from "@/context/auth-context";
import type { MediaFilter } from "@/lib/types";

const STALE = 10 * 60 * 1000; // 10 min — library metadata rarely changes in a session

/** List top-level collections (Jellyfin libraries, Plex sections, etc.) */
export function useCollections() {
  const { token } = useAuthContext();
  return useQuery({
    queryKey: ["library", "collections"],
    queryFn: () => api.library.collections(token!),
    enabled: !!token,
    staleTime: STALE,
  });
}

/**
 * List TV series, optionally scoped to a collection.
 * All series are loaded upfront so the series picker can filter client-side
 * without a request per keystroke.
 */
export function useSeries(collectionId?: string) {
  const { token } = useAuthContext();
  return useQuery({
    queryKey: ["library", "series", collectionId ?? null],
    queryFn: () => api.library.series(token!, collectionId),
    enabled: !!token,
    staleTime: STALE,
  });
}

/** List available genres, optionally scoped to a content type. */
export function useGenres(contentType?: string) {
  const { token } = useAuthContext();
  return useQuery({
    queryKey: ["library", "genres", contentType ?? null],
    queryFn: () => api.library.genres(token!, contentType),
    enabled: !!token,
    staleTime: STALE,
  });
}

/**
 * Fetch items matching a filter for the block editor's "Preview results" panel.
 * Pass `enabled: false` until the user explicitly requests a preview.
 */
export function useLibraryItems(
  filter: Pick<MediaFilter, "content_type" | "series_names" | "collections" | "search_term" | "genres"> | null,
  enabled: boolean,
  strategy?: string,
) {
  const { token } = useAuthContext();
  return useQuery({
    queryKey: ["library", "items", filter, strategy ?? null],
    queryFn: () => api.library.items(token!, filter!, 30, strategy),
    enabled: !!token && enabled && !!filter,
    staleTime: 2 * 60 * 1000,
  });
}