// The emailed invitation link, kept for this browser session until a signed-in dashboard asks about it.
const TOKEN_KEY = "akashic.clinicianInvitationToken";
// The link last accepted in this session. Signing in after accepting re-renders the landing as signed in,
// and that branch would otherwise keep the link for the dashboard to ask about again.
const ANSWERED_KEY = "akashic.clinicianInvitationAnswered";

export const readInvitationToken = (): string | null => {
  try {
    return sessionStorage.getItem(TOKEN_KEY);
  } catch {
    return null;
  }
};

export const forgetInvitationToken = () => {
  try {
    sessionStorage.removeItem(TOKEN_KEY);
  } catch {
    // Nothing kept, nothing to forget.
  }
};

/** Accepted here: forgotten, and never kept again in this session. */
export const answerInvitationToken = (token: string) => {
  try {
    sessionStorage.setItem(ANSWERED_KEY, token);
  } catch {
    // Without storage nothing was kept either.
  }
  forgetInvitationToken();
};

export const rememberInvitationToken = (token: string) => {
  try {
    if (sessionStorage.getItem(ANSWERED_KEY) === token) return;
    sessionStorage.setItem(TOKEN_KEY, token);
  } catch {
    // Private browsing may refuse storage; the person can open the link again once signed in.
  }
};