/*
 * Copyright (C) 2019. Uber Technologies
 *
 * Licensed 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
 *
 *     https://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.
 */
package autodispose2.lifecycle;

import io.reactivex.rxjava3.core.CompletableSource;
import io.reactivex.rxjava3.core.Observable;
import io.reactivex.rxjava3.subjects.BehaviorSubject;

final class TestUtil {
  private static final CorrespondingEventsFunction<Integer> CORRESPONDING_EVENTS =
      lastEvent -> {
        switch (lastEvent) {
          case 0:
            return 3;
          case 1:
            return 2;
          default:
            throw new LifecycleEndedException();
        }
      };

  private TestUtil() {
    throw new InstantiationError();
  }

  static LifecycleScopeProvider<Integer> makeLifecycleProvider(
      final BehaviorSubject<Integer> lifecycle) {
    return new LifecycleScopeProvider<Integer>() {
      @Override
      public Observable<Integer> lifecycle() {
        return lifecycle;
      }

      @Override
      public CorrespondingEventsFunction<Integer> correspondingEvents() {
        return CORRESPONDING_EVENTS;
      }

      @Override
      public Integer peekLifecycle() {
        return lifecycle.getValue();
      }

      @Override
      public CompletableSource requestScope() {
        return LifecycleScopes.resolveScopeFromLifecycle(this);
      }
    };
  }
}
