/**
 * @module plugins/dtd
 * @internal
 */

import type { IJodit, Nullable } from 'jodit/types';
import { Dom } from 'jodit/core/dom/dom';

/**
 * Checks whether the insertion of an element at the current location is allowed,
 * if it is not allowed, it deletes an empty block element or moves the cursor after it
 * @internal
 */
export function checkBlockNesting(jodit: IJodit, node: Nullable<Node>): void {
	if (Dom.isFragment(node)) {
		node = node.firstChild;
	}

	if (jodit.o.dtd.checkBlockNesting && Dom.isBlock(node)) {
		const parent = Dom.furthest(
			jodit.s.current(),
			Dom.isBlock,
			jodit.editor
		);

		if (parent && !jodit.o.dtd.blockLimits[parent.tagName.toLowerCase()]) {
			jodit.s.setCursorAfter(parent);

			if (Dom.isEmpty(parent)) {
				Dom.safeRemove(parent);
			}
		}
	}
}