/*
    * ====================================================================
    * 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.hc.client5.http.classic.methods;
  
  import java.net.URI;
  import java.util.concurrent.atomic.AtomicMarkableReference;
  
  import org.apache.hc.client5.http.config.RequestConfig;
  import org.apache.hc.core5.concurrent.Cancellable;
  import org.apache.hc.core5.concurrent.CancellableDependency;
  import org.apache.hc.core5.http.message.BasicClassicHttpRequest;
  
  /**
   * Base class for HTTP method subclasses.
   */
  public class HttpUriRequestBase extends BasicClassicHttpRequest implements HttpUriRequest, CancellableDependency {
  
      private static final long serialVersionUID = 1L;
  
      private final AtomicMarkableReference<Cancellable> cancellableRef;
      private RequestConfig requestConfig;
  
      /**
       * Constructs a new instance with the given method and request URI.
       *
       * @param method request method.
       * @param requestUri request URI.
       */
      public HttpUriRequestBase(final String method, final URI requestUri) {
          super(method, requestUri);
          this.cancellableRef = new AtomicMarkableReference<>(null, false);
      }
  
      @Override
      public boolean cancel() {
          while (!cancellableRef.isMarked()) {
              final Cancellable actualCancellable = cancellableRef.getReference();
              if (cancellableRef.compareAndSet(actualCancellable, actualCancellable, false, true)) {
                  if (actualCancellable != null) {
                      actualCancellable.cancel();
                  }
                  return true;
              }
          }
          return false;
      }
  
      @Override
      public boolean isCancelled() {
          return cancellableRef.isMarked();
      }
  
      /**
       * @since 4.2
       */
      @Override
      public void setDependency(final Cancellable cancellable) {
          final Cancellable actualCancellable = cancellableRef.getReference();
          if (!cancellableRef.compareAndSet(actualCancellable, cancellable, false, false)) {
              cancellable.cancel();
          }
      }
  
      /**
       * Resets internal state of the request making it reusable.
       *
       * @since 4.2
       */
      public void reset() {
          for (;;) {
              final boolean marked = cancellableRef.isMarked();
              final Cancellable actualCancellable = cancellableRef.getReference();
              if (actualCancellable != null) {
                  actualCancellable.cancel();
              }
             if (cancellableRef.compareAndSet(actualCancellable, null, marked, false)) {
                 break;
             }
         }
     }
 
     @Override
     public void abort() throws UnsupportedOperationException {
         cancel();
     }
 
     @Override
     public boolean isAborted() {
         return isCancelled();
     }
 
     /**
      * Sets the request configuration.
      *
      * @param requestConfig the request configuration.
      */
     public void setConfig(final RequestConfig requestConfig) {
         this.requestConfig = requestConfig;
     }
 
     @Override
     public RequestConfig getConfig() {
         return requestConfig;
     }
 
     @Override
     public String toString() {
         final StringBuilder sb = new StringBuilder();
         sb.append(getMethod()).append(" ").append(getRequestUri());
         return sb.toString();
     }
 
 }