/*
    * Copyright 2013 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:
    *
    *   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.
   */
  package io.netty.handler.codec.spdy;
  
  import io.netty.util.internal.StringUtil;
  
  /**
   * The default {@link SpdyGoAwayFrame} implementation.
   */
  public class DefaultSpdyGoAwayFrame implements SpdyGoAwayFrame {
  
      private int lastGoodStreamId;
      private SpdySessionStatus status;
  
      /**
       * Creates a new instance.
       *
       * @param lastGoodStreamId the Last-good-stream-ID of this frame
       */
      public DefaultSpdyGoAwayFrame(int lastGoodStreamId) {
          this(lastGoodStreamId, 0);
      }
  
      /**
       * Creates a new instance.
       *
       * @param lastGoodStreamId the Last-good-stream-ID of this frame
       * @param statusCode       the Status code of this frame
       */
      public DefaultSpdyGoAwayFrame(int lastGoodStreamId, int statusCode) {
          this(lastGoodStreamId, SpdySessionStatus.valueOf(statusCode));
      }
  
      /**
       * Creates a new instance.
       *
       * @param lastGoodStreamId the Last-good-stream-ID of this frame
       * @param status           the status of this frame
       */
      public DefaultSpdyGoAwayFrame(int lastGoodStreamId, SpdySessionStatus status) {
          setLastGoodStreamId(lastGoodStreamId);
          setStatus(status);
      }
  
      @Override
      public int lastGoodStreamId() {
          return lastGoodStreamId;
      }
  
      @Override
      public SpdyGoAwayFrame setLastGoodStreamId(int lastGoodStreamId) {
          if (lastGoodStreamId < 0) {
              throw new IllegalArgumentException("Last-good-stream-ID"
                      + " cannot be negative: " + lastGoodStreamId);
          }
          this.lastGoodStreamId = lastGoodStreamId;
          return this;
      }
  
      @Override
      public SpdySessionStatus status() {
          return status;
      }
  
      @Override
      public SpdyGoAwayFrame setStatus(SpdySessionStatus status) {
          this.status = status;
          return this;
      }
  
      @Override
      public String toString() {
          return new StringBuilder()
              .append(StringUtil.simpleClassName(this))
              .append(StringUtil.NEWLINE)
              .append("--> Last-good-stream-ID = ")
              .append(lastGoodStreamId())
              .append(StringUtil.NEWLINE)
              .append("--> Status: ")
              .append(status())
              .toString();
      }
  }