import {roundToExpandRect} from './round-to-expand-rect';

export const getNarrowerRect = ({
	firstRect,
	secondRect,
}: {
	firstRect: DOMRect;
	secondRect: DOMRect;
}) => {
	const left = Math.max(firstRect.left, secondRect.left);
	const top = Math.max(firstRect.top, secondRect.top);
	const bottom = Math.min(firstRect.bottom, secondRect.bottom);
	const right = Math.min(firstRect.right, secondRect.right);

	return new DOMRect(left, top, right - left, bottom - top);
};

export const getWiderRectAndExpand = ({
	firstRect,
	secondRect,
}: {
	firstRect: DOMRect | null;
	secondRect: DOMRect;
}) => {
	if (firstRect === null) {
		return roundToExpandRect(secondRect);
	}

	const left = Math.min(firstRect.left, secondRect.left);
	const top = Math.min(firstRect.top, secondRect.top);
	const bottom = Math.max(firstRect.bottom, secondRect.bottom);
	const right = Math.max(firstRect.right, secondRect.right);
	return roundToExpandRect(new DOMRect(left, top, right - left, bottom - top));
};