/*
    * 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:
    *
    *   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.spdy;
  
  import io.netty.util.internal.StringUtil;
  
  import java.util.Map;
  
  /**
   * The default {@link SpdyHeadersFrame} implementation.
   */
  public class DefaultSpdyHeadersFrame extends DefaultSpdyStreamFrame
          implements SpdyHeadersFrame {
  
      private boolean invalid;
      private boolean truncated;
      private final SpdyHeaders headers;
  
      /**
       * Creates a new instance.
       *
       * @param streamId the Stream-ID of this frame
       */
      public DefaultSpdyHeadersFrame(int streamId) {
          this(streamId, true);
      }
  
      /**
       * Creates a new instance.
       *
       * @param streamId the Stream-ID of this frame
       * @param validate validate the header names and values when adding them to the {@link SpdyHeaders}
       */
      public DefaultSpdyHeadersFrame(int streamId, boolean validate) {
          super(streamId);
          headers = new DefaultSpdyHeaders(validate);
      }
  
      @Override
      public SpdyHeadersFrame setStreamId(int streamId) {
          super.setStreamId(streamId);
          return this;
      }
  
      @Override
      public SpdyHeadersFrame setLast(boolean last) {
          super.setLast(last);
          return this;
      }
  
      @Override
      public boolean isInvalid() {
          return invalid;
      }
  
      @Override
      public SpdyHeadersFrame setInvalid() {
          invalid = true;
          return this;
      }
  
      @Override
      public boolean isTruncated() {
          return truncated;
      }
  
      @Override
      public SpdyHeadersFrame setTruncated() {
          truncated = true;
          return this;
      }
  
      @Override
      public SpdyHeaders headers() {
          return headers;
      }
  
      @Override
      public String toString() {
          StringBuilder buf = new StringBuilder()
              .append(StringUtil.simpleClassName(this))
              .append("(last: ")
              .append(isLast())
              .append(')')
              .append(StringUtil.NEWLINE)
              .append("--> Stream-ID = ")
             .append(streamId())
             .append(StringUtil.NEWLINE)
             .append("--> Headers:")
             .append(StringUtil.NEWLINE);
         appendHeaders(buf);
 
         // Remove the last newline.
         buf.setLength(buf.length() - StringUtil.NEWLINE.length());
         return buf.toString();
     }
 
     protected void appendHeaders(StringBuilder buf) {
         for (Map.Entry<CharSequence, CharSequence> e: headers()) {
             buf.append("    ");
             buf.append(e.getKey());
             buf.append(": ");
             buf.append(e.getValue());
             buf.append(StringUtil.NEWLINE);
         }
     }
 }