export type ChartLibrarySessionBranch = "clear" | "hydrate-then-persist" | "persist-self";

export function chartLibrarySessionBranch(
  accountId: string | null | undefined,
  loadedAccount: string,
): ChartLibrarySessionBranch {
  if (!accountId) return "clear";
  if (loadedAccount !== accountId) return "hydrate-then-persist";
  return "persist-self";
}

export function chartLibraryFromCloudOthers<T extends { role: "self" | "other" }, P>(
  cloudLibrary: readonly T[],
  profile: P,
  upsertSelfChart: (library: T[], profile: P) => T[],
): T[] {
  return upsertSelfChart(cloudLibrary.filter((record) => record.role !== "self"), profile);
}

export function chartLibraryOnCloudFailure<T, P>(
  profile: P,
  upsertSelfChart: (library: T[], profile: P) => T[],
): T[] {
  return upsertSelfChart([], profile);
}