/*
 * Copyright 2018 Google LLC
 *
 * 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 com.google.cloud.pubsub.v1;

import com.google.api.core.BetaApi;
import com.google.protobuf.Empty;
import com.google.protobuf.GeneratedMessageV3;
import com.google.pubsub.v1.AcknowledgeRequest;
import com.google.pubsub.v1.CreateSnapshotRequest;
import com.google.pubsub.v1.DeleteSnapshotRequest;
import com.google.pubsub.v1.DeleteSubscriptionRequest;
import com.google.pubsub.v1.GetSubscriptionRequest;
import com.google.pubsub.v1.ListSnapshotsRequest;
import com.google.pubsub.v1.ListSnapshotsResponse;
import com.google.pubsub.v1.ListSubscriptionsRequest;
import com.google.pubsub.v1.ListSubscriptionsResponse;
import com.google.pubsub.v1.ModifyAckDeadlineRequest;
import com.google.pubsub.v1.ModifyPushConfigRequest;
import com.google.pubsub.v1.PullRequest;
import com.google.pubsub.v1.PullResponse;
import com.google.pubsub.v1.SeekRequest;
import com.google.pubsub.v1.SeekResponse;
import com.google.pubsub.v1.Snapshot;
import com.google.pubsub.v1.StreamingPullRequest;
import com.google.pubsub.v1.StreamingPullResponse;
import com.google.pubsub.v1.SubscriberGrpc.SubscriberImplBase;
import com.google.pubsub.v1.Subscription;
import com.google.pubsub.v1.UpdateSnapshotRequest;
import com.google.pubsub.v1.UpdateSubscriptionRequest;
import io.grpc.stub.StreamObserver;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import java.util.Queue;

@javax.annotation.Generated("by GAPIC")
@BetaApi
public class MockSubscriberImpl extends SubscriberImplBase {
  private ArrayList<GeneratedMessageV3> requests;
  private Queue<Object> responses;

  public MockSubscriberImpl() {
    requests = new ArrayList<>();
    responses = new LinkedList<>();
  }

  public List<GeneratedMessageV3> getRequests() {
    return requests;
  }

  public void addResponse(GeneratedMessageV3 response) {
    responses.add(response);
  }

  public void setResponses(List<GeneratedMessageV3> responses) {
    this.responses = new LinkedList<Object>(responses);
  }

  public void addException(Exception exception) {
    responses.add(exception);
  }

  public void reset() {
    requests = new ArrayList<>();
    responses = new LinkedList<>();
  }

  @Override
  public void createSubscription(
      Subscription request, StreamObserver<Subscription> responseObserver) {
    Object response = responses.remove();
    if (response instanceof Subscription) {
      requests.add(request);
      responseObserver.onNext((Subscription) response);
      responseObserver.onCompleted();
    } else if (response instanceof Exception) {
      responseObserver.onError((Exception) response);
    } else {
      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
    }
  }

  @Override
  public void getSubscription(
      GetSubscriptionRequest request, StreamObserver<Subscription> responseObserver) {
    Object response = responses.remove();
    if (response instanceof Subscription) {
      requests.add(request);
      responseObserver.onNext((Subscription) response);
      responseObserver.onCompleted();
    } else if (response instanceof Exception) {
      responseObserver.onError((Exception) response);
    } else {
      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
    }
  }

  @Override
  public void updateSubscription(
      UpdateSubscriptionRequest request, StreamObserver<Subscription> responseObserver) {
    Object response = responses.remove();
    if (response instanceof Subscription) {
      requests.add(request);
      responseObserver.onNext((Subscription) response);
      responseObserver.onCompleted();
    } else if (response instanceof Exception) {
      responseObserver.onError((Exception) response);
    } else {
      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
    }
  }

  @Override
  public void listSubscriptions(
      ListSubscriptionsRequest request,
      StreamObserver<ListSubscriptionsResponse> responseObserver) {
    Object response = responses.remove();
    if (response instanceof ListSubscriptionsResponse) {
      requests.add(request);
      responseObserver.onNext((ListSubscriptionsResponse) response);
      responseObserver.onCompleted();
    } else if (response instanceof Exception) {
      responseObserver.onError((Exception) response);
    } else {
      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
    }
  }

  @Override
  public void deleteSubscription(
      DeleteSubscriptionRequest request, StreamObserver<Empty> responseObserver) {
    Object response = responses.remove();
    if (response instanceof Empty) {
      requests.add(request);
      responseObserver.onNext((Empty) response);
      responseObserver.onCompleted();
    } else if (response instanceof Exception) {
      responseObserver.onError((Exception) response);
    } else {
      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
    }
  }

  @Override
  public void modifyAckDeadline(
      ModifyAckDeadlineRequest request, StreamObserver<Empty> responseObserver) {
    Object response = responses.remove();
    if (response instanceof Empty) {
      requests.add(request);
      responseObserver.onNext((Empty) response);
      responseObserver.onCompleted();
    } else if (response instanceof Exception) {
      responseObserver.onError((Exception) response);
    } else {
      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
    }
  }

  @Override
  public void acknowledge(AcknowledgeRequest request, StreamObserver<Empty> responseObserver) {
    Object response = responses.remove();
    if (response instanceof Empty) {
      requests.add(request);
      responseObserver.onNext((Empty) response);
      responseObserver.onCompleted();
    } else if (response instanceof Exception) {
      responseObserver.onError((Exception) response);
    } else {
      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
    }
  }

  @Override
  public void pull(PullRequest request, StreamObserver<PullResponse> responseObserver) {
    Object response = responses.remove();
    if (response instanceof PullResponse) {
      requests.add(request);
      responseObserver.onNext((PullResponse) response);
      responseObserver.onCompleted();
    } else if (response instanceof Exception) {
      responseObserver.onError((Exception) response);
    } else {
      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
    }
  }

  @Override
  public StreamObserver<StreamingPullRequest> streamingPull(
      final StreamObserver<StreamingPullResponse> responseObserver) {
    final Object response = responses.remove();
    StreamObserver<StreamingPullRequest> requestObserver =
        new StreamObserver<StreamingPullRequest>() {
          @Override
          public void onNext(StreamingPullRequest value) {
            if (response instanceof StreamingPullResponse) {
              responseObserver.onNext((StreamingPullResponse) response);
            } else if (response instanceof Exception) {
              responseObserver.onError((Exception) response);
            } else {
              responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
            }
          }

          @Override
          public void onError(Throwable t) {
            responseObserver.onError(t);
          }

          @Override
          public void onCompleted() {
            responseObserver.onCompleted();
          }
        };
    return requestObserver;
  }

  @Override
  public void modifyPushConfig(
      ModifyPushConfigRequest request, StreamObserver<Empty> responseObserver) {
    Object response = responses.remove();
    if (response instanceof Empty) {
      requests.add(request);
      responseObserver.onNext((Empty) response);
      responseObserver.onCompleted();
    } else if (response instanceof Exception) {
      responseObserver.onError((Exception) response);
    } else {
      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
    }
  }

  @Override
  public void listSnapshots(
      ListSnapshotsRequest request, StreamObserver<ListSnapshotsResponse> responseObserver) {
    Object response = responses.remove();
    if (response instanceof ListSnapshotsResponse) {
      requests.add(request);
      responseObserver.onNext((ListSnapshotsResponse) response);
      responseObserver.onCompleted();
    } else if (response instanceof Exception) {
      responseObserver.onError((Exception) response);
    } else {
      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
    }
  }

  @Override
  public void createSnapshot(
      CreateSnapshotRequest request, StreamObserver<Snapshot> responseObserver) {
    Object response = responses.remove();
    if (response instanceof Snapshot) {
      requests.add(request);
      responseObserver.onNext((Snapshot) response);
      responseObserver.onCompleted();
    } else if (response instanceof Exception) {
      responseObserver.onError((Exception) response);
    } else {
      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
    }
  }

  @Override
  public void updateSnapshot(
      UpdateSnapshotRequest request, StreamObserver<Snapshot> responseObserver) {
    Object response = responses.remove();
    if (response instanceof Snapshot) {
      requests.add(request);
      responseObserver.onNext((Snapshot) response);
      responseObserver.onCompleted();
    } else if (response instanceof Exception) {
      responseObserver.onError((Exception) response);
    } else {
      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
    }
  }

  @Override
  public void deleteSnapshot(
      DeleteSnapshotRequest request, StreamObserver<Empty> responseObserver) {
    Object response = responses.remove();
    if (response instanceof Empty) {
      requests.add(request);
      responseObserver.onNext((Empty) response);
      responseObserver.onCompleted();
    } else if (response instanceof Exception) {
      responseObserver.onError((Exception) response);
    } else {
      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
    }
  }

  @Override
  public void seek(SeekRequest request, StreamObserver<SeekResponse> responseObserver) {
    Object response = responses.remove();
    if (response instanceof SeekResponse) {
      requests.add(request);
      responseObserver.onNext((SeekResponse) response);
      responseObserver.onCompleted();
    } else if (response instanceof Exception) {
      responseObserver.onError((Exception) response);
    } else {
      responseObserver.onError(new IllegalArgumentException("Unrecognized response type"));
    }
  }
}
