export default class UserStore {
  private static instance: UserStore;

  private constructor() { }

  public static getInstance(): UserStore {
    if (!UserStore.instance) {
      UserStore.instance = new UserStore();
    }
    return UserStore.instance;
  }

  public connect(accessToken: string, refreshToken: string): void {
    sessionStorage.setItem('accessToken', accessToken);
    sessionStorage.setItem('refreshToken', refreshToken);
  }

  public isConnected(): boolean {
    return sessionStorage.getItem('accessToken') !== null && sessionStorage.getItem('refreshToken') !== null;
  }

  public disconnect(): void {
    sessionStorage.removeItem('accessToken');
    sessionStorage.removeItem('refreshToken');
    sessionStorage.removeItem('userPairingId');
  }

  public getAccessToken(): string | null {
    return sessionStorage.getItem('accessToken');
  }

  public getRefreshToken(): string | null {
    return sessionStorage.getItem('refreshToken');
  }

  public pair(userPairingId: string): void {
    sessionStorage.setItem('userPairingId', userPairingId);
  }

  public getUserPairingId(): string | null {
    return sessionStorage.getItem('userPairingId');
  }
}