/** 收口拼图草稿在 session/profile/work 之间的稳定身份互推规则。 */
export function buildPuzzleResultProfileId(
  sessionId: string | null | undefined,
) {
  const stableSuffix = resolvePuzzleSessionStableSuffix(sessionId);
  return stableSuffix ? `puzzle-profile-${stableSuffix}` : null;
}

export function buildPuzzleResultWorkId(sessionId: string | null | undefined) {
  const stableSuffix = resolvePuzzleSessionStableSuffix(sessionId);
  return stableSuffix ? `puzzle-work-${stableSuffix}` : null;
}

export function buildPuzzleSessionIdFromProfileId(
  profileId: string | null | undefined,
) {
  const normalizedProfileId = profileId?.trim();
  if (!normalizedProfileId?.startsWith('puzzle-profile-')) {
    return null;
  }

  const stableSuffix = normalizedProfileId.slice('puzzle-profile-'.length);
  return stableSuffix ? `puzzle-session-${stableSuffix}` : null;
}

function resolvePuzzleSessionStableSuffix(
  sessionId: string | null | undefined,
) {
  const normalizedSessionId = sessionId?.trim();
  if (!normalizedSessionId) {
    return null;
  }
  return normalizedSessionId.startsWith('puzzle-session-')
    ? normalizedSessionId.slice('puzzle-session-'.length)
    : normalizedSessionId;
}