/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 */

import {useLexicalComposerContext} from '@lexical/react/LexicalComposerContext';
import {
  $createHorizontalRuleNode,
  INSERT_HORIZONTAL_RULE_COMMAND,
} from '@lexical/react/LexicalHorizontalRuleNode';
import {$insertNodeToNearestRoot} from '@lexical/utils';
import {
  $getSelection,
  $isRangeSelection,
  COMMAND_PRIORITY_EDITOR,
} from 'lexical';
import {useEffect} from 'react';

/**
 * This is a legacy plugin. When building an editor with the extension API,
 * configure {@link HorizontalRuleExtension} instead.
 *
 * @deprecated A pure Lexical implementation is available in `@lexical/extension`
 * as {@link HorizontalRuleExtension}
 */
export function HorizontalRulePlugin(): null {
  const [editor] = useLexicalComposerContext();

  useEffect(() => {
    return editor.registerCommand(
      INSERT_HORIZONTAL_RULE_COMMAND,
      type => {
        const selection = $getSelection();

        if (!$isRangeSelection(selection)) {
          return false;
        }

        const focusNode = selection.focus.getNode();

        if (focusNode !== null) {
          const horizontalRuleNode = $createHorizontalRuleNode();
          $insertNodeToNearestRoot(horizontalRuleNode);
        }

        return true;
      },
      COMMAND_PRIORITY_EDITOR,
    );
  }, [editor]);

  return null;
}