/*
    * Copyright 2023 LINE Corporation
    *
    * LINE Corporation 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:
    *
    *   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.linecorp.centraldogma.xds.internal;
  
  import java.util.Map;
  
  import com.google.common.base.MoreObjects;
  import com.google.common.base.Objects;
  
  import io.envoyproxy.controlplane.cache.Resources.ResourceType;
  import io.envoyproxy.controlplane.cache.SnapshotResources;
  import io.envoyproxy.controlplane.cache.VersionedResource;
  import io.envoyproxy.controlplane.cache.v3.Snapshot;
  import io.envoyproxy.envoy.config.cluster.v3.Cluster;
  import io.envoyproxy.envoy.config.endpoint.v3.ClusterLoadAssignment;
  import io.envoyproxy.envoy.config.listener.v3.Listener;
  import io.envoyproxy.envoy.config.route.v3.RouteConfiguration;
  import io.envoyproxy.envoy.extensions.transport_sockets.tls.v3.Secret;
  
  final class CentralDogmaSnapshot extends Snapshot {
  
      private final SnapshotResources<Cluster> clusters;
      private final SnapshotResources<ClusterLoadAssignment> endpoints;
      private final SnapshotResources<Listener> listeners;
      private final SnapshotResources<RouteConfiguration> routes;
      private final SnapshotResources<Secret> secrets;
  
      CentralDogmaSnapshot(SnapshotResources<Cluster> clusters,
                           SnapshotResources<ClusterLoadAssignment> endpoints,
                           SnapshotResources<Listener> listeners, SnapshotResources<RouteConfiguration> routes,
                           SnapshotResources<Secret> secrets) {
          this.clusters = clusters;
          this.endpoints = endpoints;
          this.listeners = listeners;
          this.routes = routes;
          this.secrets = secrets;
      }
  
      @Override
      public SnapshotResources<Cluster> clusters() {
          return clusters;
      }
  
      @Override
      public SnapshotResources<ClusterLoadAssignment> endpoints() {
          return endpoints;
      }
  
      @Override
      public SnapshotResources<Listener> listeners() {
          return listeners;
      }
  
      @Override
      public SnapshotResources<RouteConfiguration> routes() {
          return routes;
      }
  
      @Override
      public SnapshotResources<Secret> secrets() {
          return secrets;
      }
  
      @Override
      public Map<String, VersionedResource<?>> versionedResources(ResourceType resourceType) {
          // Have to override this method because of the type inference.
          return super.versionedResources(resourceType);
      }
  
      @Override
      public boolean equals(Object o) {
          if (this == o) {
              return true;
          }
          if (!(o instanceof CentralDogmaSnapshot)) {
              return false;
          }
          final CentralDogmaSnapshot that = (CentralDogmaSnapshot) o;
          return Objects.equal(clusters, that.clusters) &&
                 Objects.equal(endpoints, that.endpoints) &&
                 Objects.equal(listeners, that.listeners) &&
                 Objects.equal(routes, that.routes) &&
                 Objects.equal(secrets, that.secrets);
      }
  
     @Override
     public int hashCode() {
         return Objects.hashCode(clusters, endpoints, listeners, routes, secrets);
     }
 
     @Override
     public String toString() {
         return MoreObjects.toStringHelper(this)
                           .add("clusters", clusters)
                           .add("endpoints", endpoints)
                           .add("listeners", listeners)
                           .add("routes", routes)
                           .add("secrets", secrets)
                           .toString();
     }
 }