import { useMemo } from 'react';

import { COUNTRIES_PHONE_CODES } from '../../../constans/countriesPhoneCodes';
import { countryForPhone } from '../../utils/countryForPhone';

/**
 * Phone number formatting function
 */
export type FormattedPhoneNumber = (phoneNumber?: string) => string;

/**
 * Returns the function for phone number formatting
 *
 * @example
 * const formatPhoneNumber = useFormattedPhoneNumber();
 * formatPhoneNumber('+12345678900'); // +1 234 567 8900
 * formatPhoneNumber('+61312312312'); // +61 312 312 312
 * formatPhoneNumber('1234'); // 1234
 */
export function useFormattedPhoneNumber(): FormattedPhoneNumber {
  return useMemo<FormattedPhoneNumber>(() => {
    return (phone) => {
      if (!phone) {
        return '';
      }

      const country = countryForPhone(phone);

      if (country) {
        const phoneCode = COUNTRIES_PHONE_CODES[country];
        const regexp = new RegExp(`(\\${phoneCode})(\\d{3})(\\d{3})(\\d+)`, 'ig');

        return phone.replace(regexp, '$1 $2 $3 $4');
      }

      return phone;
    };
  }, []);
}