/*
    * 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.storage.encryption;
  
  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;
  import com.google.common.base.MoreObjects;
  
  /**
   * Details of a wrapped data encryption key (DEK).
   */
  public final class WrappedDekDetails {
  
      private final String wrappedDek;
      private final int dekVersion;
      private final String kekId;
      private final String projectName;
      private final String repoName;
      private final String creation;
      private final Instant creationInstant;
  
      /**
       * Creates a new instance.
       */
      public WrappedDekDetails(String wrappedDek, int dekVersion, String kekId,
                               String projectName, String repoName) {
          this(wrappedDek, dekVersion, kekId, Instant.now(), projectName, repoName);
      }
  
      /**
       * Creates a new instance.
       */
      @JsonCreator
      public WrappedDekDetails(@JsonProperty("wrappedDek") String wrappedDek,
                               @JsonProperty("dekVersion") int dekVersion,
                               @JsonProperty("kekId") String kekId,
                               @JsonProperty("creation") Instant creation,
                               @JsonProperty("projectName") String projectName,
                               @JsonProperty("repoName") String repoName) {
          this.wrappedDek = requireNonNull(wrappedDek, "wrappedDek");
          this.kekId = requireNonNull(kekId, "kekId");
          checkArgument(dekVersion > 0, "dekVersion must be positive: %s", dekVersion);
          this.dekVersion = dekVersion;
          creationInstant = creation;
          this.creation = ISO_INSTANT.format(requireNonNull(creation, "creation"));
          this.projectName = requireNonNull(projectName, "projectName");
          this.repoName = requireNonNull(repoName, "repoName");
      }
  
      /**
       * Returns the wrapped data encryption key (DEK), encoded in Base64.
       */
      @JsonProperty
      public String wrappedDek() {
          return wrappedDek;
      }
  
      /**
       * Returns the version of the data encryption key (DEK).
       */
      @JsonProperty
      public int dekVersion() {
          return dekVersion;
      }
  
      /**
       * Returns the ID of the key encryption key (KEK) used to wrap the DEK.
       */
      @JsonProperty
      public String kekId() {
          return kekId;
      }
  
      /**
       * Returns the creation time of the wrapped DEK in ISO-8601 format.
       */
      @JsonProperty
      public String creation() {
          return creation;
      }
 
     /**
      * Returns the creation {@link Instant} of the wrapped DEK.
      */
     public Instant creationInstant() {
         return creationInstant;
     }
 
     /**
      * Returns the project name associated with this wrapped DEK.
      */
     @JsonProperty
     public String projectName() {
         return projectName;
     }
 
     /**
      * Returns the repository name associated with this wrapped DEK.
      */
     @JsonProperty
     public String repoName() {
         return repoName;
     }
 
     @Override
     public int hashCode() {
         int result = wrappedDek.hashCode();
         result = 31 * result + dekVersion;
         result = 31 * result + kekId.hashCode();
         result = 31 * result + creation.hashCode();
         result = 31 * result + projectName.hashCode();
         result = 31 * result + repoName.hashCode();
         return result;
     }
 
     @Override
     public boolean equals(Object obj) {
         if (this == obj) {
             return true;
         }
         if (!(obj instanceof WrappedDekDetails)) {
             return false;
         }
         final WrappedDekDetails that = (WrappedDekDetails) obj;
         return dekVersion == that.dekVersion &&
                wrappedDek.equals(that.wrappedDek) &&
                kekId.equals(that.kekId) &&
                creation.equals(that.creation) &&
                projectName.equals(that.projectName) &&
                repoName.equals(that.repoName);
     }
 
     @Override
     public String toString() {
         return MoreObjects.toStringHelper(this)
                           .add("wrappedDek", "*****")
                           .add("dekVersion", dekVersion)
                           .add("kekId", kekId)
                           .add("creation", creation)
                           .add("projectName", projectName)
                           .add("repoName", repoName)
                           .toString();
     }
 }