import { BestAvailableLocale } from "./BestAvailableLocale.js";
import { UNICODE_EXTENSION_SEQUENCE_REGEX } from "./utils.js";
/**
* https://tc39.es/ecma402/#sec-lookupsupportedlocales
* @param availableLocales
* @param requestedLocales
*/
export function LookupSupportedLocales(availableLocales, requestedLocales) {
	const subset = [];
	for (const locale of requestedLocales) {
		const noExtensionLocale = locale.replace(UNICODE_EXTENSION_SEQUENCE_REGEX, "");
		const availableLocale = BestAvailableLocale(availableLocales, noExtensionLocale);
		if (availableLocale) {
			subset.push(availableLocale);
		}
	}
	return subset;
}