/*
 * 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.DeleteTopicRequest;
import com.google.pubsub.v1.GetTopicRequest;
import com.google.pubsub.v1.ListTopicSubscriptionsRequest;
import com.google.pubsub.v1.ListTopicSubscriptionsResponse;
import com.google.pubsub.v1.ListTopicsRequest;
import com.google.pubsub.v1.ListTopicsResponse;
import com.google.pubsub.v1.PublishRequest;
import com.google.pubsub.v1.PublishResponse;
import com.google.pubsub.v1.PublisherGrpc.PublisherImplBase;
import com.google.pubsub.v1.Topic;
import com.google.pubsub.v1.UpdateTopicRequest;
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 MockPublisherImpl extends PublisherImplBase {
  private ArrayList<GeneratedMessageV3> requests;
  private Queue<Object> responses;

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

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

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

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

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

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

  @Override
  public void deleteTopic(DeleteTopicRequest 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"));
    }
  }
}
