import type { TFunction } from "i18next";
import { api, type PlexCard } from "./api";
import { notifyActionError } from "./actionErrors";

// Persist a watch-state toggle from any Plex surface: flip via the caller's `optimistic` cache
// updater, call the API, surface a failure (the click used to look dead on 403/404/429), then
// `resync` (invalidate) — which corrects the optimistic flip to truth either way. Shared by the
// browse grid and the person page, each of which owns a different cache shape.
//
// `revert` is for a cache `resync` must NOT refetch — a random draw (Discover's Surprise rail), which
// a refetch would reshuffle under the viewer. It is called on a failure only, to put the card back.
export async function toggleWatchState(
  card: PlexCard,
  t: TFunction,
  handlers: { optimistic: (next: string) => void; resync: () => void; revert?: () => void },
) {
  const next = card.status === "watched" ? "new" : "watched";
  handlers.optimistic(next);
  try {
    await api.plexSetState(card.id, next);
  } catch (e) {
    handlers.revert?.();
    notifyActionError(e, t("plex.watchedFailed"));
  }
  handlers.resync();
}