import sanitize from '../utils/sanitize.ts';

const PHONE_REGEX =
	/^(?<country_code>\+?\d{1,3})?[\s.x-]?\(?(?<area_code>\d{3})\)?[\s.x-]?(?<central_office_code>\d{3})[\s.x-]?(?<subscriber_code>\d{4})$/;
export default function by_phone(phone: string): string[] {
	const { groups: { country_code, area_code, central_office_code, subscriber_code } } = {
		groups: {
			country_code: undefined,
			area_code: undefined,
			central_office_code: undefined,
			subscriber_code: undefined
		},
		...(phone.match(PHONE_REGEX) ?? {})
	};

	if (
		typeof area_code !== 'string' || typeof central_office_code !== 'string' ||
		typeof subscriber_code !== 'string'
	) {
		return [];
	}

	const normalized_number = `${sanitize(area_code)}-${sanitize(central_office_code)}-${sanitize(subscriber_code)}`;

	// for example, a symlinking index based on this organizer might look like:
	//           fsdb root    index country_code office_code area_code phone
	//   /path/to/db/root/.indexes/phone/1/213/555/213-555-1234
	return [
		sanitize(country_code ?? '1'),
		sanitize(area_code),
		sanitize(central_office_code),
		normalized_number,
		`${normalized_number}.json`
	];
}