/**
 * Item-equality helpers for Select. Mirrors Base UI React's
 * `packages/react/src/internals/itemEquality.ts`. The Solid port copies
 * the three functions the select machinery needs (default comparison,
 * find-index, remove-from-array). Kept local under `select/utils/` rather
 * than promoted to `src/internals/` since no other compound uses them yet.
 */

export function defaultItemEquality(a: unknown, b: unknown): boolean {
	return Object.is(a, b);
}

export function compareItemEquality(
	itemValue: unknown,
	selectedValue: unknown,
	comparer: (a: unknown, b: unknown) => boolean,
): boolean {
	try {
		return comparer(itemValue, selectedValue);
	} catch {
		return false;
	}
}

export function findItemIndex(
	values: ReadonlyArray<unknown>,
	target: unknown,
	comparer: (a: unknown, b: unknown) => boolean,
): number {
	for (let i = 0; i < values.length; i += 1) {
		if (compareItemEquality(values[i], target, comparer)) return i;
	}
	return -1;
}

export function removeItem<T>(
	list: ReadonlyArray<T>,
	item: T,
	comparer: (a: unknown, b: unknown) => boolean,
): T[] {
	const idx = findItemIndex(list, item, comparer);
	if (idx === -1) return list.slice();
	const next = list.slice();
	next.splice(idx, 1);
	return next;
}