/*
    * Copyright 2016 The Netty Project
    *
    * The Netty Project 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 io.netty.handler.codec.smtp;
  
  import io.netty.util.internal.UnstableApi;
  
  import java.util.Collections;
  import java.util.List;
  
  /**
   * Default {@link SmtpResponse} implementation.
   */
  @UnstableApi
  public final class DefaultSmtpResponse implements SmtpResponse {
  
      private final int code;
      private final List<CharSequence> details;
  
      /**
       * Creates a new instance with the given smtp code and no details.
       */
      public DefaultSmtpResponse(int code) {
          this(code, (List<CharSequence>) null);
      }
  
      /**
       * Creates a new instance with the given smtp code and details.
       */
      public DefaultSmtpResponse(int code, CharSequence... details) {
          this(code, SmtpUtils.toUnmodifiableList(details));
      }
  
      DefaultSmtpResponse(int code, List<CharSequence> details) {
          if (code < 100 || code > 599) {
              throw new IllegalArgumentException("code must be 100 <= code <= 599");
          }
          this.code = code;
          if (details == null) {
              this.details = Collections.emptyList();
          } else {
              this.details = Collections.unmodifiableList(details);
          }
      }
  
      @Override
      public int code() {
          return code;
      }
  
      @Override
      public List<CharSequence> details() {
          return details;
      }
  
      @Override
      public int hashCode() {
          return code * 31 + details.hashCode();
      }
  
      @Override
      public boolean equals(Object o) {
          if (!(o instanceof DefaultSmtpResponse)) {
              return false;
          }
  
          if (o == this) {
              return true;
          }
  
          DefaultSmtpResponse other = (DefaultSmtpResponse) o;
  
          return code() == other.code() &&
                  details().equals(other.details());
      }
  
      @Override
      public String toString() {
          return "DefaultSmtpResponse{" +
                  "code=" + code +
                  ", details=" + details +
                  '}';
      }
  }