export function compareFileExtensions(one: string | null, other: string | null): number {
	if (intlFileNameCollator) {
		const [oneName, oneExtension] = extractNameAndExtension(one);
		const [otherName, otherExtension] = extractNameAndExtension(other);

		let result = intlFileNameCollator.getValue().collator.compare(oneExtension, otherExtension);

		if (result === 0) {
			// Using the numeric option in the collator will
			// make compare(`foo1`, `foo01`) === 0. We must disambiguate.
			if (intlFileNameCollator.getValue().collatorIsNumeric && oneExtension !== otherExtension) {
				return oneExtension < otherExtension ? -1 : 1;
			}

			// Extensions are equal, compare filenames
			result = intlFileNameCollator.getValue().collator.compare(oneName, otherName);

			if (intlFileNameCollator.getValue().collatorIsNumeric && result === 0 && oneName !== otherName) {
				return oneName < otherName ? -1 : 1;
			}
		}

		return result;
	}

	return noIntlCompareFileExtensions(one, other);
}

export function compareFileNames(one: string | null, other: string | null, caseSensitive = false): number {
	if (intlFileNameCollator) {
		const a = one || '';
		const b = other || '';
		const result = intlFileNameCollator.getValue().collator.compare(a, b);

		// Using the numeric option in the collator will
		// make compare(`foo1`, `foo01`) === 0. We must disambiguate.
		if (intlFileNameCollator.getValue().collatorIsNumeric && result === 0 && a !== b) {
			return a < b ? -1 : 1;
		}

		return result;
	}

	return noIntlCompareFileNames(one, other, caseSensitive);
}