export const MAX_NAME_LENGTH = 80;

export function parseName(raw) {
	if (typeof raw !== "string") return undefined;
	const trimmed = raw.trim();
	if (trimmed.length === 0 || trimmed.length > MAX_NAME_LENGTH) return undefined;
	return trimmed;
}

export function hasNameConflict(records, sameParent, name, exceptId) {
	const needle = name.toLowerCase();
	return records.some((record) =>
		sameParent(record) &&
		record.id !== exceptId &&
		record.name.toLowerCase() === needle
	);
}

export function nextSortIndex(siblings) {
	return siblings.reduce((max, record) => Math.max(max, record.sortIndex ?? 0), 0) + 1;
}

export function isExactIdSet(ids, allowed) {
	if (ids.length !== allowed.size) return false;
	const seen = new Set();
	for (const id of ids) {
		if (!allowed.has(id) || seen.has(id)) return false;
		seen.add(id);
	}
	return true;
}