/*
    * ====================================================================
    * 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  package org.apache.hc.client5.http.auth;
  
  import java.io.Serializable;
  import java.security.Principal;
  import java.util.Locale;
  import java.util.Objects;
  
  import org.apache.hc.core5.annotation.Contract;
  import org.apache.hc.core5.annotation.ThreadingBehavior;
  import org.apache.hc.core5.util.Args;
  import org.apache.hc.core5.util.LangUtils;
  
  /**
   * Microsoft Windows specific user principal implementation.
   *
   * @since 4.0
   */
  @Contract(threading = ThreadingBehavior.IMMUTABLE)
  public class NTUserPrincipal implements Principal, Serializable {
  
      private static final long serialVersionUID = -6870169797924406894L;
  
      private final String username;
      private final String domain;
      private final String ntname;
  
      public NTUserPrincipal(
              final String domain,
              final String username) {
          super();
          Args.notNull(username, "User name");
          this.username = username;
          if (domain != null) {
              this.domain = domain.toUpperCase(Locale.ROOT);
          } else {
              this.domain = null;
          }
          if (this.domain != null && !this.domain.isEmpty()) {
              final StringBuilder buffer = new StringBuilder();
              buffer.append(this.domain);
              buffer.append('\\');
              buffer.append(this.username);
              this.ntname = buffer.toString();
          } else {
              this.ntname = this.username;
          }
      }
  
      @Override
      public String getName() {
          return this.ntname;
      }
  
      public String getDomain() {
          return this.domain;
      }
  
      public String getUsername() {
          return this.username;
      }
  
      @Override
      public int hashCode() {
          int hash = LangUtils.HASH_SEED;
          hash = LangUtils.hashCode(hash, this.username);
          hash = LangUtils.hashCode(hash, this.domain);
          return hash;
      }
  
      @Override
      public boolean equals(final Object o) {
          if (this == o) {
              return true;
         }
         if (o instanceof NTUserPrincipal) {
             final NTUserPrincipal that = (NTUserPrincipal) o;
             return Objects.equals(this.username, that.username)
                     && Objects.equals(this.domain, that.domain);
         }
         return false;
     }
 
     @Override
     public String toString() {
         return this.ntname;
     }
 
 }