const MOBILE_PHONE_RE = /^1[3-9]\d{9}$/;

export function normalizePhoneInput(value: string): string {
  return value.replace(/\D/g, '').slice(0, 11);
}

export function validateMobilePhone(phone: string): { ok: boolean; message?: string } {
  const trimmed = phone.trim();
  if (!trimmed) {
    return { ok: false, message: '请输入手机号码' };
  }
  if (trimmed.length !== 11) {
    return { ok: false, message: '手机号码须为 11 位' };
  }
  if (!MOBILE_PHONE_RE.test(trimmed)) {
    return { ok: false, message: '请输入正确的手机号码' };
  }
  return { ok: true };
}