export type Role = "user" | "moderator" | "admin";

export const ROLES: readonly Role[] = ["user", "moderator", "admin"];

export function isRole(value: unknown): value is Role {
  return typeof value === "string" &&
    (ROLES as readonly string[]).includes(value);
}

/** A user as anyone may see them: no password hash, no email. */
export interface PublicUser {
  id: string;
  username: string;
  role: Role;
  createdAt: Date;
  updatedAt?: Date;
  avatarMime?: string;
  description?: string;
  invitedByUsername?: string;
}

/** A user as they see themselves: everything but the password hash. */
export interface SelfUser extends PublicUser {
  email: string;
}

/** A match for the @mention autocomplete. */
export interface UserSuggestion {
  id: string;
  username: string;
  avatarMime: string | null;
}

/** Someone a user invited, directly or down the line. */
export interface Invitee {
  id: string;
  username: string;
  avatarMime?: string;
  invitedById: string;
  createdAt: Date;
}

export interface LoginUserRequest {
  username: string;
  password: string;
}

export interface RegisterUserRequest {
  username: string;
  password: string;
  inviteToken: string;
  email: string;
}

export interface UpdateUserRequest {
  username?: string;
  password?: string;
  role?: Role;
  description?: string | null;
  email?: string;
}

/** The session token, plus the media-only one for file and thumbnail URLs. */
export interface AuthTokens {
  token: string;
  mediaToken: string;
}

export interface AuthResponse extends AuthTokens {
  user: SelfUser;
}

export type MediaTokenResponse = Pick<AuthTokens, "mediaToken">;

export interface InviteResponse {
  token: string;
}