/*
    * ====================================================================
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  
  package org.apache.http.client.fluent;
  
  import java.net.URI;
  import java.util.concurrent.atomic.AtomicBoolean;
  import java.util.concurrent.atomic.AtomicReference;
  
  import org.apache.http.HttpVersion;
  import org.apache.http.ProtocolVersion;
  import org.apache.http.RequestLine;
  import org.apache.http.client.config.RequestConfig;
  import org.apache.http.client.methods.Configurable;
  import org.apache.http.client.methods.HttpExecutionAware;
  import org.apache.http.client.methods.HttpUriRequest;
  import org.apache.http.concurrent.Cancellable;
  import org.apache.http.message.AbstractHttpMessage;
  import org.apache.http.message.BasicRequestLine;
  import org.apache.http.util.Args;
  
  class InternalHttpRequest extends AbstractHttpMessage
          implements HttpUriRequest, HttpExecutionAware, Configurable {
  
      private final String method;
      private ProtocolVersion version;
      private URI uri;
      private RequestConfig config;
  
      private final AtomicBoolean aborted;
      private final AtomicReference<Cancellable> cancellableRef;
  
      InternalHttpRequest(final String method, final URI requestURI) {
          Args.notBlank(method, "Method");
          Args.notNull(requestURI, "Request URI");
          this.method = method;
          this.uri = requestURI;
          this.aborted = new AtomicBoolean(false);
          this.cancellableRef = new AtomicReference<Cancellable>(null);
      }
  
      public void setProtocolVersion(final ProtocolVersion version) {
          this.version = version;
      }
  
      @Override
      public ProtocolVersion getProtocolVersion() {
          return version != null ? version : HttpVersion.HTTP_1_1;
      }
  
      @Override
      public String getMethod() {
          return this.method;
      }
  
      @Override
      public URI getURI() {
          return this.uri;
      }
  
      @Override
      public void abort() throws UnsupportedOperationException {
          if (this.aborted.compareAndSet(false, true)) {
              final Cancellable cancellable = this.cancellableRef.getAndSet(null);
              if (cancellable != null) {
                  cancellable.cancel();
              }
          }
      }
  
      @Override
      public boolean isAborted() {
          return this.aborted.get();
      }
  
     @Override
     public void setCancellable(final Cancellable cancellable) {
         if (!this.aborted.get()) {
             this.cancellableRef.set(cancellable);
         }
     }
 
     @Override
     public RequestLine getRequestLine() {
         final ProtocolVersion ver = getProtocolVersion();
         final URI uriCopy = getURI();
         String uritext = null;
         if (uriCopy != null) {
             uritext = uriCopy.toASCIIString();
         }
         if (uritext == null || uritext.isEmpty()) {
             uritext = "/";
         }
         return new BasicRequestLine(getMethod(), uritext, ver);
     }
 
     @Override
     public RequestConfig getConfig() {
         return config;
     }
 
     public void setConfig(final RequestConfig config) {
         this.config = config;
     }
 
     public void setURI(final URI uri) {
         this.uri = uri;
     }
 
     @Override
     public String toString() {
         return getMethod() + " " + getURI() + " " + getProtocolVersion();
     }
 
 }