/*
    * ====================================================================
    * 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.impl.async;
  
  import java.io.Closeable;
  import java.util.List;
  import java.util.concurrent.ThreadFactory;
  
  import org.apache.hc.client5.http.HttpRoute;
  import org.apache.hc.client5.http.async.AsyncExecRuntime;
  import org.apache.hc.client5.http.auth.AuthSchemeFactory;
  import org.apache.hc.client5.http.auth.CredentialsProvider;
  import org.apache.hc.client5.http.config.RequestConfig;
  import org.apache.hc.client5.http.cookie.CookieSpecFactory;
  import org.apache.hc.client5.http.cookie.CookieStore;
  import org.apache.hc.client5.http.protocol.HttpClientContext;
  import org.apache.hc.client5.http.routing.HttpRoutePlanner;
  import org.apache.hc.core5.annotation.Contract;
  import org.apache.hc.core5.annotation.Internal;
  import org.apache.hc.core5.annotation.ThreadingBehavior;
  import org.apache.hc.core5.http.HttpException;
  import org.apache.hc.core5.http.HttpHost;
  import org.apache.hc.core5.http.config.Lookup;
  import org.apache.hc.core5.http.nio.AsyncPushConsumer;
  import org.apache.hc.core5.http.nio.HandlerFactory;
  import org.apache.hc.core5.http2.nio.pool.H2ConnPool;
  import org.apache.hc.core5.reactor.DefaultConnectingIOReactor;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Internal implementation of HTTP/2 only {@link CloseableHttpAsyncClient}.
   * <p>
   * Concurrent message exchanges with the same connection route executed by
   * this client will get automatically multiplexed over a single physical HTTP/2
   * connection.
   * </p>
   *
   * @since 5.0
   */
  @Contract(threading = ThreadingBehavior.SAFE_CONDITIONAL)
  @Internal
  public final class InternalH2AsyncClient extends InternalAbstractHttpAsyncClient {
  
      private static final Logger LOG = LoggerFactory.getLogger(InternalH2AsyncClient.class);
      private final HttpRoutePlanner routePlanner;
      private final H2ConnPool connPool;
  
      InternalH2AsyncClient(
              final DefaultConnectingIOReactor ioReactor,
              final AsyncExecChainElement execChain,
              final AsyncPushConsumerRegistry pushConsumerRegistry,
              final ThreadFactory threadFactory,
              final H2ConnPool connPool,
              final HttpRoutePlanner routePlanner,
              final Lookup<CookieSpecFactory> cookieSpecRegistry,
              final Lookup<AuthSchemeFactory> authSchemeRegistry,
              final CookieStore cookieStore,
              final CredentialsProvider credentialsProvider,
              final RequestConfig defaultConfig,
              final List<Closeable> closeables) {
          super(ioReactor, pushConsumerRegistry, threadFactory, execChain,
                  cookieSpecRegistry, authSchemeRegistry, cookieStore, credentialsProvider, defaultConfig, closeables);
          this.connPool = connPool;
          this.routePlanner = routePlanner;
      }
  
      @Override
      AsyncExecRuntime createAsyncExecRuntime(final HandlerFactory<AsyncPushConsumer> pushHandlerFactory,
                                              final HttpRoute route) {
          return new InternalH2AsyncExecRuntime(LOG, connPool, pushHandlerFactory);
      }
  
      @Override
      HttpRoute determineRoute(final HttpHost httpHost, final HttpClientContext clientContext) throws HttpException {
         final HttpRoute route = routePlanner.determineRoute(httpHost, clientContext);
         if (route.isTunnelled()) {
             throw new HttpException("HTTP/2 tunneling not supported");
         }
         return route;
     }
 
 }