/*
    * 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.http;
  
  import io.netty.buffer.ByteBuf;
  import io.netty.buffer.ByteBufUtil;
  import io.netty.buffer.Unpooled;
  import io.netty.util.IllegalReferenceCountException;
  
  import static io.netty.handler.codec.http.DefaultHttpHeadersFactory.headersFactory;
  import static io.netty.handler.codec.http.DefaultHttpHeadersFactory.trailersFactory;
  import static io.netty.util.internal.ObjectUtil.checkNotNull;
  
  /**
   * Default implementation of {@link FullHttpRequest}.
   */
  public class DefaultFullHttpRequest extends DefaultHttpRequest implements FullHttpRequest {
      private final ByteBuf content;
      private final HttpHeaders trailingHeader;
  
      /**
       * Used to cache the value of the hash code and avoid {@link IllegalReferenceCountException}.
       */
      private int hash;
  
      /**
       * Create a full HTTP response with the given HTTP version, method, and URI.
       */
      public DefaultFullHttpRequest(HttpVersion httpVersion, HttpMethod method, String uri) {
          this(httpVersion, method, uri, Unpooled.buffer(0), headersFactory(), trailersFactory());
      }
  
      /**
       * Create a full HTTP response with the given HTTP version, method, URI, and contents.
       */
      public DefaultFullHttpRequest(HttpVersion httpVersion, HttpMethod method, String uri, ByteBuf content) {
          this(httpVersion, method, uri, content, headersFactory(), trailersFactory());
      }
  
      /**
       * Create a full HTTP response with the given HTTP version, method, URI, and optional validation.
       * @deprecated Use the {@link #DefaultFullHttpRequest(HttpVersion, HttpMethod, String, ByteBuf,
       * HttpHeadersFactory, HttpHeadersFactory)} constructor instead.
       */
      @Deprecated
      public DefaultFullHttpRequest(HttpVersion httpVersion, HttpMethod method, String uri, boolean validateHeaders) {
          this(httpVersion, method, uri, Unpooled.buffer(0),
                  headersFactory().withValidation(validateHeaders),
                  trailersFactory().withValidation(validateHeaders));
      }
  
      /**
       * Create a full HTTP response with the given HTTP version, method, URI, contents, and optional validation.
       * @deprecated Use the {@link #DefaultFullHttpRequest(HttpVersion, HttpMethod, String, ByteBuf,
       * HttpHeadersFactory, HttpHeadersFactory)} constructor instead.
       */
      @Deprecated
      public DefaultFullHttpRequest(HttpVersion httpVersion, HttpMethod method, String uri,
                                    ByteBuf content, boolean validateHeaders) {
          this(httpVersion, method, uri, content,
                  headersFactory().withValidation(validateHeaders),
                  trailersFactory().withValidation(validateHeaders));
      }
  
      /**
       * Create a full HTTP response with the given HTTP version, method, URI, contents,
       * and factories for creating headers and trailers.
       * <p>
       * The recommended default header factory is {@link DefaultHttpHeadersFactory#headersFactory()},
       * and the recommended default trailer factory is {@link DefaultHttpHeadersFactory#trailersFactory()}.
       */
      public DefaultFullHttpRequest(HttpVersion httpVersion, HttpMethod method, String uri,
              ByteBuf content, HttpHeadersFactory headersFactory, HttpHeadersFactory trailersFactory) {
          this(httpVersion, method, uri, content, headersFactory.newHeaders(), trailersFactory.newHeaders());
      }
  
      /**
       * Create a full HTTP response with the given HTTP version, method, URI, contents, and header and trailer objects.
       */
      public DefaultFullHttpRequest(HttpVersion httpVersion, HttpMethod method, String uri,
              ByteBuf content, HttpHeaders headers, HttpHeaders trailingHeader) {
          this(httpVersion, method, uri, content, headers, trailingHeader, true);
      }
  
      /**
       * Create a full HTTP response with the given HTTP version, method, URI, contents, and header and trailer objects.
      */
     public DefaultFullHttpRequest(HttpVersion httpVersion, HttpMethod method, String uri,
             ByteBuf content, HttpHeaders headers, HttpHeaders trailingHeader, boolean validateRequestLine) {
         super(httpVersion, method, uri, headers, validateRequestLine);
         this.content = checkNotNull(content, "content");
         this.trailingHeader = checkNotNull(trailingHeader, "trailingHeader");
     }
 
     @Override
     public HttpHeaders trailingHeaders() {
         return trailingHeader;
     }
 
     @Override
     public ByteBuf content() {
         return content;
     }
 
     @Override
     public int refCnt() {
         return content.refCnt();
     }
 
     @Override
     public FullHttpRequest retain() {
         content.retain();
         return this;
     }
 
     @Override
     public FullHttpRequest retain(int increment) {
         content.retain(increment);
         return this;
     }
 
     @Override
     public FullHttpRequest touch() {
         content.touch();
         return this;
     }
 
     @Override
     public FullHttpRequest touch(Object hint) {
         content.touch(hint);
         return this;
     }
 
     @Override
     public boolean release() {
         return content.release();
     }
 
     @Override
     public boolean release(int decrement) {
         return content.release(decrement);
     }
 
     @Override
     public FullHttpRequest setProtocolVersion(HttpVersion version) {
         super.setProtocolVersion(version);
         return this;
     }
 
     @Override
     public FullHttpRequest setMethod(HttpMethod method) {
         super.setMethod(method);
         return this;
     }
 
     @Override
     public FullHttpRequest setUri(String uri) {
         super.setUri(uri);
         return this;
     }
 
     @Override
     public FullHttpRequest copy() {
         return replace(content().copy());
     }
 
     @Override
     public FullHttpRequest duplicate() {
         return replace(content().duplicate());
     }
 
     @Override
     public FullHttpRequest retainedDuplicate() {
         return replace(content().retainedDuplicate());
     }
 
     @Override
     public FullHttpRequest replace(ByteBuf content) {
         FullHttpRequest request = new DefaultFullHttpRequest(protocolVersion(), method(), uri(), content,
                 headers().copy(), trailingHeaders().copy());
         request.setDecoderResult(decoderResult());
         return request;
     }
 
     @Override
     public int hashCode() {
         int hash = this.hash;
         if (hash == 0) {
             if (ByteBufUtil.isAccessible(content())) {
                 try {
                     hash = 31 + content().hashCode();
                 } catch (IllegalReferenceCountException ignored) {
                     // Handle race condition between checking refCnt() == 0 and using the object.
                     hash = 31;
                 }
             } else {
                 hash = 31;
             }
             hash = 31 * hash + trailingHeaders().hashCode();
             hash = 31 * hash + super.hashCode();
             this.hash = hash;
         }
         return hash;
     }
 
     @Override
     public boolean equals(Object o) {
         if (!(o instanceof DefaultFullHttpRequest)) {
             return false;
         }
 
         DefaultFullHttpRequest other = (DefaultFullHttpRequest) o;
 
         return super.equals(other) &&
                content().equals(other.content()) &&
                trailingHeaders().equals(other.trailingHeaders());
     }
 
     @Override
     public String toString() {
         return HttpMessageUtil.appendFullRequest(new StringBuilder(256), this).toString();
     }
 }