/**
 * User Interface
 * Represents a registered user in the system
 */
export interface User {
  id: string;
  username: string;
  email: string;
  role: 'user' | 'admin';
  isActive: boolean;
  totalQuizzesTaken?: number;
  totalQuestionsAnswered?: number;
  totalCorrectAnswers?: number;
  currentStreak?: number;
  longestStreak?: number;
  averageScore?: number;
  createdAt: string;
  updatedAt: string;
}

/**
 * User Registration Request
 */
export interface UserRegistration {
  username: string;
  email: string;
  password: string;
  guestSessionId?: string;
}

/**
 * User Login Request
 */
export interface UserLogin {
  email: string;
  password: string;
}

/**
 * Auth Response
 */
export interface AuthResponse {
  success: boolean;
  data: {
    user: User;
    token: string;
  };

  message?: string;
  migratedStats?: {
    quizzesTaken: number;
    score: number;
  };
}

/**
 * Auth State (for signal management)
 */
export interface AuthState {
  user: User | null;
  isAuthenticated: boolean;
  isLoading: boolean;
  error: string | null;
}