/**
 * @module plugins/backspace
 */

import type { IJodit } from 'jodit/types';
import { Dom } from 'jodit/core/dom/dom';
import { INSEPARABLE_TAGS } from 'jodit/core/constants';

import { checkRemoveEmptyParent } from './check-remove-empty-parent';

/**
 * Check possibility inseparable Element can be removed (img, hr etc.)
 *
 * @example
 * ```html
 * <p>first second <img>| stop</p>
 * ```
 * result
 * ```html
 * <p>first second | stop</p>
 * ```
 *
 * @private
 */
export function checkRemoveUnbreakableElement(
	jodit: IJodit,
	fakeNode: Node,
	backspace: boolean
): boolean {
	const neighbor = Dom.findSibling(fakeNode, backspace);
	const parent = neighbor?.parentNode;

	if (Dom.isTag(parent, 'jodit-file')) {
		Dom.safeRemove(parent);
		return true;
	}

	if (
		Dom.isTag(parent, 'jodit-link-preview-content') ||
		Dom.isTag(fakeNode?.parentNode, 'jodit-link-preview-content') ||
		Dom.isTag(
			fakeNode?.parentNode?.parentNode,
			'jodit-link-preview-content'
		)
	) {
		let targetElement = neighbor ?? fakeNode;
		while (targetElement && targetElement.parentNode !== jodit.editor) {
			if (Dom.isTag(targetElement, 'jodit-link-preview')) {
				Dom.safeRemove(targetElement);
				return true;
			}
			targetElement = targetElement.parentNode as Node;
		}
	}

	if (
		Dom.isElement(neighbor) &&
		(Dom.isTag(neighbor, INSEPARABLE_TAGS) || Dom.isEmpty(neighbor))
	) {
		Dom.safeRemove(neighbor);

		if (
			Dom.isTag(neighbor, 'br') &&
			!Dom.findNotEmptySibling(fakeNode, false)
		) {
			Dom.after(fakeNode, jodit.createInside.element('br'));
		}

		jodit.s.setCursorBefore(fakeNode);

		if (Dom.isTag(neighbor, 'br')) {
			checkRemoveEmptyParent(jodit, fakeNode, backspace);
		}

		return true;
	}

	return false;
}