export interface SessionData {
  userId: string;
  role?: string;
}

export interface Session extends SessionData {
  createdAt: number;
  expiresAt: number;
}

export function createSession(userData: SessionData): Session {
  return {
    ...userData,
    createdAt: Date.now(),
    expiresAt: Date.now() + (24 * 60 * 60 * 1000),
  };
}

export function isSessionValid(session: Session): boolean {
  return Date.now() < session.expiresAt;
}

export function getSessionAge(session: Session): number {
  return Date.now() - session.createdAt;
}

export function getSessionTimeRemaining(session: Session): number {
  return Math.max(0, session.expiresAt - Date.now());
}

export function isSessionExpired(session: Session): boolean {
  return Date.now() >= session.expiresAt;
}

export function createSessionWithCustomExpiration(userData: SessionData, expiresInMs: number): Session {
  return {
    ...userData,
    createdAt: Date.now(),
    expiresAt: Date.now() + expiresInMs,
  };
}