import type { AuthenticatedUser } from "../../api/types";

type Principal = Pick<AuthenticatedUser, "issuer" | "subject">;

function key(user: Principal) {
  return `thothii:selected-session:${JSON.stringify([window.location.pathname, user.issuer, user.subject])}`;
}

export function readRememberedSession(user: Principal): string | null {
  try { return sessionStorage.getItem(key(user)); } catch { return null; }
}

export function rememberSession(user: Principal, sessionId: string | null): void {
  try {
    if (sessionId) sessionStorage.setItem(key(user), sessionId);
    else sessionStorage.removeItem(key(user));
  } catch { /* Reload continuity is optional when browser storage is blocked. */ }
}