/*
    * 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 static io.netty.util.internal.ObjectUtil.checkPositiveOrZero;
  
  import io.netty.util.internal.StringUtil;
  
  /**
   * The default {@link SpdySynStreamFrame} implementation.
   */
  public class DefaultSpdySynStreamFrame extends DefaultSpdyHeadersFrame
          implements SpdySynStreamFrame {
  
      private int associatedStreamId;
      private byte priority;
      private boolean unidirectional;
  
      /**
       * Creates a new instance.
       *
       * @param streamId           the Stream-ID of this frame
       * @param associatedStreamId the Associated-To-Stream-ID of this frame
       * @param priority           the priority of the stream
       */
      public DefaultSpdySynStreamFrame(int streamId, int associatedStreamId, byte priority) {
          this(streamId, associatedStreamId, priority, true);
      }
  
      /**
       * Creates a new instance.
       *
       * @param streamId           the Stream-ID of this frame
       * @param associatedStreamId the Associated-To-Stream-ID of this frame
       * @param priority           the priority of the stream
       * @param validateHeaders    validate the header names and values when adding them to the {@link SpdyHeaders}
       */
      public DefaultSpdySynStreamFrame(int streamId, int associatedStreamId, byte priority, boolean validateHeaders) {
          super(streamId, validateHeaders);
          setAssociatedStreamId(associatedStreamId);
          setPriority(priority);
      }
  
      @Override
      public SpdySynStreamFrame setStreamId(int streamId) {
          super.setStreamId(streamId);
          return this;
      }
  
      @Override
      public SpdySynStreamFrame setLast(boolean last) {
          super.setLast(last);
          return this;
      }
  
      @Override
      public SpdySynStreamFrame setInvalid() {
          super.setInvalid();
          return this;
      }
  
      @Override
      public int associatedStreamId() {
          return associatedStreamId;
      }
  
      @Override
      public SpdySynStreamFrame setAssociatedStreamId(int associatedStreamId) {
          checkPositiveOrZero(associatedStreamId, "associatedStreamId");
          this.associatedStreamId = associatedStreamId;
          return this;
      }
  
      @Override
      public byte priority() {
          return priority;
      }
  
      @Override
      public SpdySynStreamFrame setPriority(byte priority) {
          if (priority < 0 || priority > 7) {
              throw new IllegalArgumentException(
                      "Priority must be between 0 and 7 inclusive: " + priority);
          }
          this.priority = priority;
          return this;
     }
 
     @Override
     public boolean isUnidirectional() {
         return unidirectional;
     }
 
     @Override
     public SpdySynStreamFrame setUnidirectional(boolean unidirectional) {
         this.unidirectional = unidirectional;
         return this;
     }
 
     @Override
     public String toString() {
         StringBuilder buf = new StringBuilder()
             .append(StringUtil.simpleClassName(this))
             .append("(last: ")
             .append(isLast())
             .append("; unidirectional: ")
             .append(isUnidirectional())
             .append(')')
             .append(StringUtil.NEWLINE)
             .append("--> Stream-ID = ")
             .append(streamId())
             .append(StringUtil.NEWLINE);
         if (associatedStreamId != 0) {
             buf.append("--> Associated-To-Stream-ID = ")
                .append(associatedStreamId())
                .append(StringUtil.NEWLINE);
         }
         buf.append("--> Priority = ")
            .append(priority())
            .append(StringUtil.NEWLINE)
            .append("--> Headers:")
            .append(StringUtil.NEWLINE);
         appendHeaders(buf);
 
         // Remove the last newline.
         buf.setLength(buf.length() - StringUtil.NEWLINE.length());
         return buf.toString();
     }
 }