content: /*
   * 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.cassandra.sidecar.handlers;
  
  import java.util.Collections;
  import java.util.concurrent.CountDownLatch;
  import java.util.concurrent.TimeUnit;
  
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.extension.ExtendWith;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.google.inject.AbstractModule;
  import com.google.inject.Guice;
  import com.google.inject.Injector;
  import com.google.inject.Module;
  import com.google.inject.Provides;
  import com.google.inject.Singleton;
  import com.google.inject.util.Modules;
  import io.vertx.core.Vertx;
  import io.vertx.ext.web.client.WebClient;
  import io.vertx.ext.web.client.predicate.ResponsePredicate;
  import io.vertx.junit5.VertxExtension;
  import io.vertx.junit5.VertxTestContext;
  import org.apache.cassandra.sidecar.TestModule;
  import org.apache.cassandra.sidecar.cluster.CassandraAdapterDelegate;
  import org.apache.cassandra.sidecar.cluster.InstancesMetadata;
  import org.apache.cassandra.sidecar.cluster.instance.InstanceMetadata;
  import org.apache.cassandra.sidecar.common.response.OperationalJobResponse;
  import org.apache.cassandra.sidecar.common.server.StorageOperations;
  import org.apache.cassandra.sidecar.modules.SidecarModules;
  import org.apache.cassandra.sidecar.server.Server;
  import org.mockito.AdditionalAnswers;
  
  import static io.netty.handler.codec.http.HttpResponseStatus.ACCEPTED;
  import static io.netty.handler.codec.http.HttpResponseStatus.CONFLICT;
  import static io.netty.handler.codec.http.HttpResponseStatus.OK;
  import static org.apache.cassandra.sidecar.common.data.OperationalJobStatus.RUNNING;
  import static org.apache.cassandra.sidecar.common.data.OperationalJobStatus.SUCCEEDED;
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.mockito.ArgumentMatchers.anyBoolean;
  import static org.mockito.Mockito.doAnswer;
  import static org.mockito.Mockito.doThrow;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  /**
   * Tests for the {@link NodeDecommissionHandler}
   */
  @ExtendWith(VertxExtension.class)
  public class NodeDecommissionHandlerTest
  {
      static final Logger LOGGER = LoggerFactory.getLogger(NodeDecommissionHandlerTest.class);
      Vertx vertx;
      Server server;
      StorageOperations mockStorageOperations = mock(StorageOperations.class);
      @BeforeEach
      void before() throws InterruptedException
      {
          Injector injector;
          Module testOverride = Modules.override(new TestModule())
                                       .with(new NodeDecommissionHandlerTest.NodeDecommissionTestModule());
          injector = Guice.createInjector(Modules.override(SidecarModules.all())
                                                 .with(testOverride));
          vertx = injector.getInstance(Vertx.class);
          server = injector.getInstance(Server.class);
          VertxTestContext context = new VertxTestContext();
          server.start()
                .onSuccess(s -> context.completeNow())
                .onFailure(context::failNow);
          context.awaitCompletion(5, TimeUnit.SECONDS);
      }
  
      @AfterEach
      void after() throws InterruptedException
      {
          CountDownLatch closeLatch = new CountDownLatch(1);
          server.close().onSuccess(res -> closeLatch.countDown());
          if (closeLatch.await(60, TimeUnit.SECONDS))
              LOGGER.info("Close event received before timeout.");
          else
              LOGGER.error("Close event timed out.");
      }
  
      @Test
      void testDecommissionLongRunning(VertxTestContext context)
      {
          when(mockStorageOperations.operationMode()).thenReturn("NORMAL");
          doAnswer(AdditionalAnswers.answersWithDelay(6000, invocation -> null))
          .when(mockStorageOperations).decommission(anyBoolean());
  
          WebClient client = WebClient.create(vertx);
          String testRoute = "/api/v1/cassandra/operations/decommission";
          client.put(server.actualPort(), "127.0.0.1", testRoute)
                .expect(ResponsePredicate.SC_ACCEPTED)
                .send(context.succeeding(response -> {
                    assertThat(response.statusCode()).isEqualTo(ACCEPTED.code());
                    OperationalJobResponse decommissionResponse = response.bodyAsJson(OperationalJobResponse.class);
                    assertThat(decommissionResponse).isNotNull();
                    assertThat(decommissionResponse.status()).isEqualTo(RUNNING);
                    context.completeNow();
                }));
      }
  
      @Test
      void testDecommissionCompleted(VertxTestContext context)
      {
          when(mockStorageOperations.operationMode()).thenReturn("NORMAL");
          WebClient client = WebClient.create(vertx);
          String testRoute = "/api/v1/cassandra/operations/decommission";
          client.put(server.actualPort(), "127.0.0.1", testRoute)
                .send(context.succeeding(response -> {
                    assertThat(response.statusCode()).isEqualTo(OK.code());
                    LOGGER.info("Decommission Response: {}", response.bodyAsString());
  
                    OperationalJobResponse decommissionResponse = response.bodyAsJson(OperationalJobResponse.class);
                    assertThat(decommissionResponse).isNotNull();
                    assertThat(decommissionResponse.status()).isEqualTo(SUCCEEDED);
                    context.completeNow();
                }));
      }
  
      @Test
      void testDecommissionFailed(VertxTestContext context)
      {
          when(mockStorageOperations.operationMode()).thenReturn("NORMAL");
          doThrow(new RuntimeException("Simulated failure")).when(mockStorageOperations).decommission(anyBoolean());
          WebClient client = WebClient.create(vertx);
          String testRoute = "/api/v1/cassandra/operations/decommission";
          client.put(server.actualPort(), "127.0.0.1", testRoute)
                .expect(ResponsePredicate.SC_OK)
                .send(context.succeeding(response -> {
                    assertThat(response.statusCode()).isEqualTo(OK.code());
                    context.completeNow();
                }));
      }
  
      @Test
      void testDecommissionConflict(VertxTestContext context)
      {
          when(mockStorageOperations.operationMode()).thenReturn("LEAVING");
          WebClient client = WebClient.create(vertx);
          String testRoute = "/api/v1/cassandra/operations/decommission";
          client.put(server.actualPort(), "127.0.0.1", testRoute)
                .expect(ResponsePredicate.SC_CONFLICT)
                .send(context.succeeding(response -> {
                    assertThat(response.statusCode()).isEqualTo(CONFLICT.code());
  
                    LOGGER.info("Decommission Response: {}", response.bodyAsString());
                    OperationalJobResponse decommissionResponse = response.bodyAsJson(OperationalJobResponse.class);
                    assertThat(decommissionResponse).isNotNull();
                    assertThat(decommissionResponse.jobId()).isNotNull();
                    context.completeNow();
                }));
      }
  
      /**
       * Test guice module for Node Decommission handler tests
       */
      class NodeDecommissionTestModule extends AbstractModule
      {
          @Provides
          @Singleton
          public InstancesMetadata instanceMetadata()
          {
              final int instanceId = 100;
              final String host = "127.0.0.1";
              final InstanceMetadata instanceMetadata = mock(InstanceMetadata.class);
              when(instanceMetadata.host()).thenReturn(host);
              when(instanceMetadata.port()).thenReturn(9042);
              when(instanceMetadata.id()).thenReturn(instanceId);
              when(instanceMetadata.stagingDir()).thenReturn("");
  
              CassandraAdapterDelegate delegate = mock(CassandraAdapterDelegate.class);
  
              when(delegate.storageOperations()).thenReturn(mockStorageOperations);
              when(instanceMetadata.delegate()).thenReturn(delegate);
  
              InstancesMetadata mockInstancesMetadata = mock(InstancesMetadata.class);
              when(mockInstancesMetadata.instances()).thenReturn(Collections.singletonList(instanceMetadata));
              when(mockInstancesMetadata.instanceFromId(instanceId)).thenReturn(instanceMetadata);
              when(mockInstancesMetadata.instanceFromHost(host)).thenReturn(instanceMetadata);
  
              return mockInstancesMetadata;
          }
      }
  
  }
  