/**
 * @license
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import { ownerDocument } from './scope.js';
import { product } from './cartesian.js';

export function createRangeSelectorCreator(createSelector) {
  return function createRangeSelector(selector) {
    const startSelector = createSelector(selector.startSelector);
    const endSelector = createSelector(selector.endSelector);

    return async function* matchAll(scope) {
      const document = ownerDocument(scope);

      const startMatches = startSelector(scope);
      const endMatches = endSelector(scope);

      const pairs = product(startMatches, endMatches);

      for await (let [start, end] of pairs) {
        const result = document.createRange();

        result.setStart(start.endContainer, start.endOffset);
        result.setEnd(end.startContainer, end.startOffset);

        if (!result.collapsed) yield result;
      }
    };
  };
}