/*
    * 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.syncope.ext.opensearch.client;
  
  import org.opensearch.client.opensearch.OpenSearchClient;
  import org.opensearch.client.opensearch.cluster.HealthResponse;
  import org.springframework.boot.actuate.health.Health;
  import org.springframework.boot.actuate.health.HealthIndicator;
  
  public class SyncopeOpenSearchHealthContributor implements HealthIndicator {
  
      protected final OpenSearchClient client;
  
      public SyncopeOpenSearchHealthContributor(final OpenSearchClient client) {
          this.client = client;
      }
  
      @Override
      public Health health() {
          Health.Builder builder = new Health.Builder();
  
          try {
              HealthResponse health = client.cluster().health();
              switch (health.status()) {
                  case Green:
                  case Yellow:
                      builder.up();
                      break;
  
                  case Red:
                  default:
                      builder.down();
              }
              builder.withDetail("cluster_name", health.clusterName());
              builder.withDetail("status", health.status().jsonValue());
              builder.withDetail("timed_out", health.timedOut());
              builder.withDetail("number_of_nodes", health.numberOfNodes());
              builder.withDetail("number_of_data_nodes", health.numberOfDataNodes());
              builder.withDetail("active_primary_shards", health.activePrimaryShards());
              builder.withDetail("relocating_shards", health.relocatingShards());
              builder.withDetail("initializing_shards", health.initializingShards());
              builder.withDetail("unassigned_shards", health.unassignedShards());
              builder.withDetail("delayed_unassigned_shards", health.delayedUnassignedShards());
              builder.withDetail("number_of_pending_tasks", health.numberOfPendingTasks());
              builder.withDetail("number_of_in_flight_fetch", health.numberOfInFlightFetch());
              builder.withDetail("task_max_waiting_in_queue_millis", health.taskMaxWaitingInQueueMillis());
              builder.withDetail("active_shards_percent_as_number", health.activeShardsPercentAsNumber());
          } catch (Exception e) {
              builder.down(e);
          }
  
          return builder.build();
      }
  }