import type { Country } from '../../data/countries';

// Reference fro localeCompare : https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/localeCompare
const filterCountriesByIso3 = (countries: readonly Country[], iso3Codes: readonly string[]) => {
  const iso3CodesSet = new Set(iso3Codes);
  return countries.filter((country) => !iso3CodesSet.has(country.iso3));
};

/**
 * Removes the countries sepecified in the second param
 *
 * @param countries list of country metadata objects
 * @param disabledCountries list of iso3 country codes to remove from the list
 */
export const excludeCountries = (
  countries: readonly Country[],
  disabledCountries: readonly string[],
) => {
  return disabledCountries.length > 0
    ? filterCountriesByIso3(countries, disabledCountries)
    : countries;
};