import Metadata from '../metadata.js';
import matchesEntirely from './matchesEntirely.js';
import extractNationalNumber from './extractNationalNumber.js';
import checkNumberLength from './checkNumberLength.js';
import getCountryCallingCode from '../getCountryCallingCode.js';

/**
 * Sometimes some people incorrectly input international phone numbers
 * without the leading `+`. This function corrects such input.
 * @param  {string} number — Phone number digits.
 * @param  {string} [country] — Exact country of the phone number.
 * @param  {string} [defaultCountry]
 * @param  {string} [defaultCallingCode]
 * @param  {object} metadata
 * @return {object} `{ countryCallingCode: string?, number: string }`.
 */
export default function extractCountryCallingCodeFromInternationalNumberWithoutPlusSign(number, country, defaultCountry, defaultCallingCode, metadata) {
  var countryCallingCode = country || defaultCountry ? getCountryCallingCode(country || defaultCountry, metadata) : defaultCallingCode;
  if (number.indexOf(countryCallingCode) === 0) {
    metadata = new Metadata(metadata);
    metadata.selectNumberingPlan(country || defaultCountry, countryCallingCode);
    var possibleShorterNumber = number.slice(countryCallingCode.length);
    var _extractNationalNumbe = extractNationalNumber(possibleShorterNumber, country, metadata),
      possibleShorterNationalNumber = _extractNationalNumbe.nationalNumber;
    var _extractNationalNumbe2 = extractNationalNumber(number, country, metadata),
      nationalNumber = _extractNationalNumbe2.nationalNumber;

    // If the number was not valid before but is valid now,
    // or if it was too long before, we consider the number
    // with the country calling code stripped to be a better result
    // and keep that instead.
    // For example, in Germany (+49), `49` is a valid area code,
    // so if a number starts with `49`, it could be both a valid
    // national German number or an international number without
    // a leading `+`.
    if (!matchesEntirely(nationalNumber, metadata.nationalNumberPattern()) && matchesEntirely(possibleShorterNationalNumber, metadata.nationalNumberPattern()) || checkNumberLength(nationalNumber, country, metadata) === 'TOO_LONG') {
      return {
        countryCallingCode: countryCallingCode,
        number: possibleShorterNumber
      };
    }
  }
  return {
    number: number
  };
}
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