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   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 org.apache.camel.quarkus.component.google.secret.manager.it;
  
  import java.io.IOException;
  import java.util.Locale;
  import java.util.concurrent.TimeUnit;
  
  import com.google.api.gax.core.CredentialsProvider;
  import com.google.api.gax.core.NoCredentialsProvider;
  import com.google.api.gax.grpc.GrpcTransportChannel;
  import com.google.api.gax.rpc.FixedTransportChannelProvider;
  import com.google.cloud.pubsub.v1.*;
  import com.google.pubsub.v1.*;
  import io.grpc.ManagedChannel;
  import io.grpc.ManagedChannelBuilder;
  import org.apache.camel.quarkus.test.support.google.GoogleCloudContext;
  import org.apache.camel.quarkus.test.support.google.GoogleCloudTestResource;
  import org.apache.camel.quarkus.test.support.google.GoogleTestEnvCustomizer;
  import org.apache.commons.lang3.RandomStringUtils;
  import org.testcontainers.containers.GenericContainer;
  import org.testcontainers.containers.PubSubEmulatorContainer;
  import org.testcontainers.utility.DockerImageName;
  
  public class GooglePubSubCustomizer implements GoogleTestEnvCustomizer {
  
      private static final String TEST_PROJECT_ID = "test-project";
  
      private PubSubEmulatorContainer container;
  
      @Override
      public GenericContainer createContainer() {
          DockerImageName imageName = DockerImageName.parse(GoogleCloudTestResource.GOOGLE_EMULATOR_IMAGE);
          container = new PubSubEmulatorContainer(imageName);
          return container;
      }
  
      @Override
      public void customize(GoogleCloudContext envContext) {
          try {
              SubscriptionAdminClient subscriptionClient = createSubscriptionAdminClient(envContext);
              TopicAdminClient topicClient = createTopicAdminClient(envContext);
  
              String projectId = envContext.getProperties().getOrDefault(GoogleCloudTestResource.PARAM_PROJECT_ID,
                      TEST_PROJECT_ID);
  
              envContext.property("project.id", projectId);
              if (container != null) {
                  envContext.property("cq-test-authenticate", "false");
                  envContext.property("cq-test-endpoint", container.getEmulatorEndpoint());
              }
  
              final String refreshTopicName = "camel-quarkus-refresh-topic-"
                      + RandomStringUtils.secure().nextAlphanumeric(49).toLowerCase(Locale.ROOT);
              envContext.property("google-pubsub.refresh-topic-name", refreshTopicName);
  
              final String refreshSubscriptionName = "camel-quarkus-refresh-subscription-"
                      + RandomStringUtils.secure().nextAlphanumeric(49).toLowerCase(Locale.ROOT);
              envContext.property("google-pubsub.refresh-subscription-name", refreshSubscriptionName);
  
              Topic topic = createTopic(topicClient, refreshTopicName, projectId);
              Subscription subscription = createSubscription(subscriptionClient, topic, refreshSubscriptionName, projectId);
  
              envContext.closeable(() -> {
                  subscriptionClient.deleteSubscription(subscription.getName());
                  topicClient.deleteTopic(topic.getName());
  
                  topicClient.shutdown();
                  subscriptionClient.shutdown();
  
                  topicClient.awaitTermination(5, TimeUnit.SECONDS);
                  subscriptionClient.awaitTermination(5, TimeUnit.SECONDS);
              });
  
          } catch (Exception e) {
              throw new RuntimeException(e);
          }
      }
  
      private Topic createTopic(TopicAdminClient topicClient, String topicName, String projectId) {
          Topic topic = Topic.newBuilder().setName(TopicName.of(projectId, topicName).toString()).build();
          return topicClient.createTopic(topic);
      }
  
      private Subscription createSubscription(SubscriptionAdminClient subscriptionClient, Topic topic, String subscriptionName,
              String projectId) {
          return createSubscription(subscriptionClient, topic, subscriptionName, projectId, false);
      }
  
      private Subscription createSubscription(SubscriptionAdminClient subscriptionClient, Topic topic, String subscriptionName,
              String projectId,
              boolean enableOrdering) {
          ProjectSubscriptionName projectSubscriptionName = ProjectSubscriptionName.of(projectId, subscriptionName);
          Subscription.Builder subscriptionBuilder = Subscription.newBuilder()
                  .setName(projectSubscriptionName.toString())
                  .setTopic(topic.getName())
                  .setAckDeadlineSeconds(10);
  
          if (enableOrdering) {
              subscriptionBuilder = subscriptionBuilder.setEnableMessageOrdering(true);
          }
  
          return subscriptionClient.createSubscription(subscriptionBuilder.build());
      }
  
      private FixedTransportChannelProvider createChannelProvider(GoogleCloudContext context) {
          ManagedChannel channel = ManagedChannelBuilder
                  .forTarget(String.format("%s:%s", container.getHost(), container.getFirstMappedPort()))
                  .usePlaintext()
                  .build();
  
          return FixedTransportChannelProvider.create(GrpcTransportChannel.create(channel));
      }
  
      private TopicAdminClient createTopicAdminClient(GoogleCloudContext context) throws IOException {
          if (!context.isUsingMockBackend()) {
              return TopicAdminClient.create();
          }
          FixedTransportChannelProvider channelProvider = createChannelProvider(context);
          CredentialsProvider credentialsProvider = NoCredentialsProvider.create();
  
          try {
              return TopicAdminClient.create(
                      TopicAdminSettings.newBuilder()
                              .setTransportChannelProvider(channelProvider)
                              .setCredentialsProvider(credentialsProvider)
                              .build());
          } catch (IOException e) {
              throw new RuntimeException(e);
          }
      }
  
      private SubscriptionAdminClient createSubscriptionAdminClient(GoogleCloudContext context) throws IOException {
          if (!context.isUsingMockBackend()) {
              return SubscriptionAdminClient.create();
          }
          FixedTransportChannelProvider channelProvider = createChannelProvider(context);
          CredentialsProvider credentialsProvider = NoCredentialsProvider.create();
  
          try {
              return SubscriptionAdminClient.create(
                      SubscriptionAdminSettings.newBuilder()
                              .setTransportChannelProvider(channelProvider)
                              .setCredentialsProvider(credentialsProvider)
                              .build());
          } catch (IOException e) {
              throw new RuntimeException(e);
          }
      }
  
  }
  