export class PublicError extends Error {
  code: string;
  constructor(code: string, message?: string) {
    super(message ?? code);
    this.code = code;
  }
}

export function publicMessageFor(code: string) {
  // Consumer-safe message - only for sensitive pages like auth
  return "Something went wrong. Please contact the website owner.";
}

export function createValidationError(message: string) {
  return new PublicError("VALIDATION_ERROR", message);
}

export function isPublicError(err: unknown): err is PublicError {
  return typeof err === "object" && err !== null && "code" in err && err instanceof Error;
}