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/*
 * Copyright (C) 2016 Jake Wharton
 *
 * 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 com.jakewharton.retrofit2.adapter.rxjava2;

import io.reactivex.BackpressureStrategy;
import io.reactivex.Observable;
import io.reactivex.Scheduler;
import java.lang.reflect.Type;
import retrofit2.Call;
import retrofit2.CallAdapter;
import retrofit2.Response;

final class RxJava2CallAdapter implements CallAdapter {
  private final Type responseType;
  private final Scheduler scheduler;
  private final boolean isResult;
  private final boolean isBody;
  private final boolean isFlowable;
  private final boolean isSingle;
  private final boolean isCompletable;

  RxJava2CallAdapter(Type responseType, Scheduler scheduler, boolean isResult, boolean isBody,
      boolean isFlowable, boolean isSingle, boolean isCompletable) {
    this.responseType = responseType;
    this.scheduler = scheduler;
    this.isResult = isResult;
    this.isBody = isBody;
    this.isFlowable = isFlowable;
    this.isSingle = isSingle;
    this.isCompletable = isCompletable;
  }

  @Override public Type responseType() {
    return responseType;
  }

  @Override public  Object adapt(Call call) {
    Observable> responseObservable = new CallObservable<>(call);

    Observable observable;
    if (isResult) {
      observable = new ResultObservable<>(responseObservable);
    } else if (isBody) {
      observable = new BodyObservable<>(responseObservable);
    } else {
      observable = responseObservable;
    }

    if (scheduler != null) {
      observable = observable.subscribeOn(scheduler);
    }

    if (isFlowable) {
      return observable.toFlowable(BackpressureStrategy.LATEST);
    }
    if (isSingle) {
      return observable.toSingle();
    }
    if (isCompletable) {
      return observable.toCompletable();
    }
    return observable;
  }
}