/*
 * Copyright 2020 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
 *
 * 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.
 */

import static junit.framework.TestCase.assertNotNull;
import static org.hamcrest.MatcherAssert.assertThat;

import com.google.api.gax.longrunning.OperationFuture;
import com.google.cloud.dataproc.v1.AutoscalingPolicyName;
import com.google.cloud.dataproc.v1.AutoscalingPolicyServiceClient;
import com.google.cloud.dataproc.v1.AutoscalingPolicyServiceSettings;
import com.google.cloud.dataproc.v1.ClusterControllerClient;
import com.google.cloud.dataproc.v1.ClusterControllerSettings;
import com.google.cloud.dataproc.v1.ClusterOperationMetadata;
import com.google.protobuf.Empty;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.util.UUID;
import java.util.concurrent.ExecutionException;
import org.hamcrest.CoreMatchers;
import org.junit.After;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Ignore;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

@RunWith(JUnit4.class)
public class CreateClusterWithAutoscalingTest {

  private static final String CLUSTER_NAME =
      String.format("java-as-test-%s", UUID.randomUUID().toString());
  private static final String REGION = "us-central1";
  private static final String PROJECT_ID = System.getenv("GOOGLE_CLOUD_PROJECT");
  private static final String AUTOSCALING_POLICY_NAME =
      String.format("java-as-test-%s", UUID.randomUUID().toString());

  private ByteArrayOutputStream bout;

  private static void requireEnv(String varName) {
    assertNotNull(
        String.format("Environment variable '%s' is required to perform these tests.", varName),
        System.getenv(varName));
  }

  @BeforeClass
  public static void checkRequirements() {
    requireEnv("GOOGLE_APPLICATION_CREDENTIALS");
    requireEnv("GOOGLE_CLOUD_PROJECT");
  }

  @Before
  public void setUp() {
    bout = new ByteArrayOutputStream();
    System.setOut(new PrintStream(bout));
  }

  @After
  public void tearDown() throws IOException, InterruptedException, ExecutionException {
    String myEndpoint = String.format("%s-dataproc.googleapis.com:443", REGION);

    ClusterControllerSettings clusterControllerSettings =
        ClusterControllerSettings.newBuilder().setEndpoint(myEndpoint).build();

    AutoscalingPolicyServiceSettings autoscalingPolicyServiceSettings =
        AutoscalingPolicyServiceSettings.newBuilder().setEndpoint(myEndpoint).build();

    try (ClusterControllerClient clusterControllerClient =
            ClusterControllerClient.create(clusterControllerSettings);
        AutoscalingPolicyServiceClient autoscalingPolicyServiceClient =
            AutoscalingPolicyServiceClient.create(autoscalingPolicyServiceSettings)) {

      OperationFuture<Empty, ClusterOperationMetadata> deleteClusterAsyncRequest =
          clusterControllerClient.deleteClusterAsync(PROJECT_ID, REGION, CLUSTER_NAME);
      deleteClusterAsyncRequest.get();

      AutoscalingPolicyName name =
          AutoscalingPolicyName.ofProjectLocationAutoscalingPolicyName(
              PROJECT_ID, REGION, AUTOSCALING_POLICY_NAME);
      autoscalingPolicyServiceClient.deleteAutoscalingPolicy(name);
    }
  }

  @Test
  @Ignore("TODO: remove after fixing https://github.com/GoogleCloudPlatform/java-docs-samples/issues/9245")
  public void createClusterWithAutoscalingTest() throws IOException, InterruptedException {
    CreateClusterWithAutoscaling.createClusterwithAutoscaling(
        PROJECT_ID, REGION, CLUSTER_NAME, AUTOSCALING_POLICY_NAME);
    String output = bout.toString();

    assertThat(output, CoreMatchers.containsString(CLUSTER_NAME));
  }
}
