/*
 * Copyright (c) 2016-present Invertase Limited & Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this library 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 {
  Firestore,
  Query,
  namedQuery as firestoreNamedQuery,
} from "firebase/firestore";
import { NamedQuery } from "./index";

const namedQueryCache: { [key: string]: Query } = {};

export function namedQuery<T>(
  firestore: Firestore,
  name: string
): NamedQuery<T> {
  const key = `${firestore.app.name}:${name}`;

  if (namedQueryCache[key]) {
    return namedQueryCache[key] as Query<T>;
  }

  return () =>
    firestoreNamedQuery(firestore, name).then((query) => {
      if (query) {
        namedQueryCache[key] = query;
        return query as Query<T>;
      }

      return null;
    });
}