/*
    * Copyright 2025 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.server.internal.api.sysadmin;
  
  import static com.google.common.base.MoreObjects.toStringHelper;
  import static com.google.common.base.Preconditions.checkArgument;
  import static java.time.format.DateTimeFormatter.ISO_INSTANT;
  import static java.util.Objects.requireNonNull;
  
  import java.time.Instant;
  
  import com.fasterxml.jackson.annotation.JsonCreator;
  import com.fasterxml.jackson.annotation.JsonProperty;
  
  /**
   * Data transfer object (DTO) for a session master key.
   * Sensitive information such as the key material or salt is not included.
   */
  public final class SessionMasterKeyDto {
  
      private final int version;
      private final String kekId;
      private final String creation;
  
      /**
       * Creates a new instance.
       */
      @JsonCreator
      public SessionMasterKeyDto(@JsonProperty("version") int version,
                                 @JsonProperty("kekId") String kekId,
                                 @JsonProperty("creation") Instant creation) {
          checkArgument(version > 0, "version must be positive: %s", version);
          this.version = version;
          this.kekId = requireNonNull(kekId, "kekId");
          this.creation = ISO_INSTANT.format(requireNonNull(creation, "creation"));
      }
  
      /**
       * Returns the version of the session master key.
       */
      @JsonProperty
      public int version() {
          return version;
      }
  
      /**
       * Returns the key encryption key (KEK) ID used to wrap the session master key.
       */
      @JsonProperty
      public String kekId() {
          return kekId;
      }
  
      /**
       * Returns the creation timestamp of the session master key.
       */
      @JsonProperty
      public String creation() {
          return creation;
      }
  
      @Override
      public String toString() {
          return toStringHelper(this).add("version", version)
                                     .add("kekId", kekId)
                                     .add("creation", creation)
                                     .toString();
      }
  }