import { PhoneNumberUtil, PhoneNumberFormat } from "google-libphonenumber";
import type { Phone, E164, CountryISO } from "./groups.types";

const phoneUtil = PhoneNumberUtil.getInstance();

export const enrichPhoneNumber = (e164: string): Phone | null => {
  try {
    const phoneNumber = phoneUtil.parse(e164, "ZZ");
    if (!phoneUtil.isValidNumber(phoneNumber)) {
      return null;
    }

    const normalizedE164 = phoneUtil.format(
      phoneNumber,
      PhoneNumberFormat.E164,
    ) as E164;
    const region = phoneUtil.getRegionCodeForNumber(phoneNumber) as CountryISO;
    const countryCallingCode = phoneNumber.getCountryCode()?.toString();
    const national = phoneNumber.getNationalNumber()?.toString();
    const ext = phoneNumber.getExtension() || undefined;
    const formatted = phoneUtil.format(
      phoneNumber,
      PhoneNumberFormat.INTERNATIONAL,
    );

    return {
      e164: normalizedE164,
      region,
      countryCallingCode,
      national,
      ext,
      formatted,
    };
  } catch (error) {
    return null;
  }
};

export const isValidE164 = (e164: string): boolean => {
  try {
    const phoneNumber = phoneUtil.parse(e164, "ZZ");
    return phoneUtil.isValidNumber(phoneNumber);
  } catch (error) {
    return false;
  }
};