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/*
 * Copyright (C) 2015 Square, Inc.
 *
 * 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
 *
 *      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.
 */
package retrofit.mock;

import rx.Observable;
import rx.Single;
import rx.functions.Func1;

import static java.util.concurrent.TimeUnit.MILLISECONDS;

final class SingleHelper {
  @SuppressWarnings("unchecked") // Caller must instanceof / getClass() verify 'value' is Single.
  public static Object applySingleBehavior(final NetworkBehavior behavior, Object value) {
    final Single single = (Single) value;
    return Observable.timer(behavior.calculateDelay(MILLISECONDS), MILLISECONDS)
        .flatMap(new Func1>() {
          @Override public Observable call(Long ignored) {
            if (behavior.calculateIsFailure()) {
              return Observable.error(behavior.failureException());
            }
            return single.toObservable();
          }
        })
        .toSingle();
  }
}