/*
 * 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 { isUndefined } from '@react-native-firebase/app/dist/module/common';

export default class SnapshotMetadata {
  _metadata: [boolean, boolean];

  constructor(metadata: [boolean, boolean]) {
    this._metadata = metadata;
  }

  get fromCache(): boolean {
    return this._metadata[0];
  }

  get hasPendingWrites(): boolean {
    return this._metadata[1];
  }

  isEqual(other: SnapshotMetadata): boolean {
    if (isUndefined(other) || !(other instanceof SnapshotMetadata)) {
      throw new Error(
        "firebase.firestore() SnapshotMetadata.isEqual(*) 'other' expected instance of SnapshotMetadata",
      );
    }

    return this.fromCache === other.fromCache && this.hasPendingWrites === other.hasPendingWrites;
  }
}