import { UxCommand } from "../constants";
import { Command } from "../types";
import { closest } from "../pquery";
import { schema } from "../schema";
import { compose } from "../compose";
import { WedgeSelection } from "../wedge/WedgeSelection";

const { hr } = compose;

export const insertHorizontalRule: Command = (state, dispatch) => {
  const { $anchor, empty } = state.selection;
  if (empty && closest($anchor, node => node.type === schema.nodes.p) !== null) {
    if (dispatch !== undefined) {
      dispatch(state.tr.replaceSelectionWith(hr().node));
    }
    return true;
  }
  if (state.selection instanceof WedgeSelection) {
    if (dispatch !== undefined) {
      const tr = state.tr;
      tr.replaceSelectionWith(hr().node);
      tr.setSelection(new WedgeSelection(tr.doc.resolve(state.selection.anchor + 1)));
      dispatch(tr);
    }
    return true;
  }
  return false;
};

export const ux = {
  [UxCommand.InsertHorizontalRule]: insertHorizontalRule
};