/*
    * ====================================================================
    * 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.impl.nio.bootstrap;
  
  import java.net.InetAddress;
  import java.util.HashMap;
  import java.util.LinkedList;
  import java.util.Map;
  
  import javax.net.ssl.SSLContext;
  
  import org.apache.http.ConnectionReuseStrategy;
  import org.apache.http.ExceptionLogger;
  import org.apache.http.HttpRequestInterceptor;
  import org.apache.http.HttpResponseFactory;
  import org.apache.http.HttpResponseInterceptor;
  import org.apache.http.config.ConnectionConfig;
  import org.apache.http.impl.DefaultConnectionReuseStrategy;
  import org.apache.http.impl.DefaultHttpResponseFactory;
  import org.apache.http.impl.nio.DefaultNHttpServerConnection;
  import org.apache.http.impl.nio.DefaultNHttpServerConnectionFactory;
  import org.apache.http.impl.nio.SSLNHttpServerConnectionFactory;
  import org.apache.http.impl.nio.reactor.IOReactorConfig;
  import org.apache.http.nio.NHttpConnectionFactory;
  import org.apache.http.nio.protocol.HttpAsyncExpectationVerifier;
  import org.apache.http.nio.protocol.HttpAsyncRequestHandler;
  import org.apache.http.nio.protocol.HttpAsyncRequestHandlerMapper;
  import org.apache.http.nio.protocol.HttpAsyncService;
  import org.apache.http.nio.protocol.UriHttpAsyncRequestHandlerMapper;
  import org.apache.http.nio.reactor.ssl.SSLSetupHandler;
  import org.apache.http.protocol.HttpProcessor;
  import org.apache.http.protocol.HttpProcessorBuilder;
  import org.apache.http.protocol.ResponseConnControl;
  import org.apache.http.protocol.ResponseContent;
  import org.apache.http.protocol.ResponseDate;
  import org.apache.http.protocol.ResponseServer;
  
  /**
   * @since 4.4
   */
  public class ServerBootstrap {
  
      private int listenerPort;
      private InetAddress localAddress;
      private IOReactorConfig ioReactorConfig;
      private ConnectionConfig connectionConfig;
      private LinkedList<HttpRequestInterceptor> requestFirst;
      private LinkedList<HttpRequestInterceptor> requestLast;
      private LinkedList<HttpResponseInterceptor> responseFirst;
      private LinkedList<HttpResponseInterceptor> responseLast;
      private String serverInfo;
      private HttpProcessor httpProcessor;
      private ConnectionReuseStrategy connStrategy;
      private HttpResponseFactory responseFactory;
      private HttpAsyncRequestHandlerMapper handlerMapper;
      private Map<String, HttpAsyncRequestHandler<?>> handlerMap;
      private HttpAsyncExpectationVerifier expectationVerifier;
      private SSLContext sslContext;
      private SSLSetupHandler sslSetupHandler;
      private NHttpConnectionFactory<? extends DefaultNHttpServerConnection> connectionFactory;
      private ExceptionLogger exceptionLogger;
  
      private ServerBootstrap() {
      }
  
      public static ServerBootstrap bootstrap() {
          return new ServerBootstrap();
      }
  
      /**
       * Sets listener port number.
       */
      public final ServerBootstrap setListenerPort(final int listenerPort) {
          this.listenerPort = listenerPort;
          return this;
     }
 
     /**
      * Assigns local interface for the listener.
      */
     public final ServerBootstrap setLocalAddress(final InetAddress localAddress) {
         this.localAddress = localAddress;
         return this;
     }
 
     /**
      * Sets I/O reactor configuration.
      */
     public final ServerBootstrap setIOReactorConfig(final IOReactorConfig ioReactorConfig) {
         this.ioReactorConfig = ioReactorConfig;
         return this;
     }
 
     /**
      * Sets connection configuration.
      * <p>
      * Please note this value can be overridden by the {@link #setConnectionFactory(
      *   org.apache.http.nio.NHttpConnectionFactory)} method.
      */
     public final ServerBootstrap setConnectionConfig(final ConnectionConfig connectionConfig) {
         this.connectionConfig = connectionConfig;
         return this;
     }
 
     /**
      * Assigns {@link org.apache.http.protocol.HttpProcessor} instance.
      */
     public final ServerBootstrap setHttpProcessor(final HttpProcessor httpProcessor) {
         this.httpProcessor = httpProcessor;
         return this;
     }
 
     /**
      * Adds this protocol interceptor to the head of the protocol processing list.
      * <p>
      * Please note this value can be overridden by the {@link #setHttpProcessor(
      * org.apache.http.protocol.HttpProcessor)} method.
      */
     public final ServerBootstrap addInterceptorFirst(final HttpResponseInterceptor itcp) {
         if (itcp == null) {
             return this;
         }
         if (responseFirst == null) {
             responseFirst = new LinkedList<HttpResponseInterceptor>();
         }
         responseFirst.addFirst(itcp);
         return this;
     }
 
     /**
      * Adds this protocol interceptor to the tail of the protocol processing list.
      * <p>
      * Please note this value can be overridden by the {@link #setHttpProcessor(
      * org.apache.http.protocol.HttpProcessor)} method.
      */
     public final ServerBootstrap addInterceptorLast(final HttpResponseInterceptor itcp) {
         if (itcp == null) {
             return this;
         }
         if (responseLast == null) {
             responseLast = new LinkedList<HttpResponseInterceptor>();
         }
         responseLast.addLast(itcp);
         return this;
     }
 
     /**
      * Adds this protocol interceptor to the head of the protocol processing list.
      * <p>
      * Please note this value can be overridden by the {@link #setHttpProcessor(
      * org.apache.http.protocol.HttpProcessor)} method.
      */
     public final ServerBootstrap addInterceptorFirst(final HttpRequestInterceptor itcp) {
         if (itcp == null) {
             return this;
         }
         if (requestFirst == null) {
             requestFirst = new LinkedList<HttpRequestInterceptor>();
         }
         requestFirst.addFirst(itcp);
         return this;
     }
 
     /**
      * Adds this protocol interceptor to the tail of the protocol processing list.
      * <p>
      * Please note this value can be overridden by the {@link #setHttpProcessor(
      * org.apache.http.protocol.HttpProcessor)} method.
      */
     public final ServerBootstrap addInterceptorLast(final HttpRequestInterceptor itcp) {
         if (itcp == null) {
             return this;
         }
         if (requestLast == null) {
             requestLast = new LinkedList<HttpRequestInterceptor>();
         }
         requestLast.addLast(itcp);
         return this;
     }
 
     /**
      * Assigns {@code Server} response header value.
      * <p>
      * Please note this value can be overridden by the {@link #setHttpProcessor(
      * org.apache.http.protocol.HttpProcessor)} method.
      */
     public final ServerBootstrap setServerInfo(final String serverInfo) {
         this.serverInfo = serverInfo;
         return this;
     }
 
     /**
      * Assigns {@link org.apache.http.ConnectionReuseStrategy} instance.
      */
     public final ServerBootstrap setConnectionReuseStrategy(final ConnectionReuseStrategy connStrategy) {
         this.connStrategy = connStrategy;
         return this;
     }
 
     /**
      * Assigns {@link org.apache.http.HttpResponseFactory} instance.
      */
     public final ServerBootstrap setResponseFactory(final HttpResponseFactory responseFactory) {
         this.responseFactory = responseFactory;
         return this;
     }
 
     /**
      * Assigns {@link org.apache.http.nio.protocol.HttpAsyncRequestHandlerMapper} instance.
      */
     public final ServerBootstrap setHandlerMapper(final HttpAsyncRequestHandlerMapper handlerMapper) {
         this.handlerMapper = handlerMapper;
         return this;
     }
 
     /**
      * Registers the given {@link org.apache.http.nio.protocol.HttpAsyncRequestHandler}
      * as a handler for URIs matching the given pattern.
      * <p>
      * Please note this value can be overridden by the {@link #setHandlerMapper(
      *   org.apache.http.nio.protocol.HttpAsyncRequestHandlerMapper)} )} method.
      *
      * @param pattern the pattern to register the handler for.
      * @param handler the handler.
      */
     public final ServerBootstrap registerHandler(final String pattern, final HttpAsyncRequestHandler<?> handler) {
         if (pattern == null || handler == null) {
             return this;
         }
         if (handlerMap == null) {
             handlerMap = new HashMap<String, HttpAsyncRequestHandler<?>>();
         }
         handlerMap.put(pattern, handler);
         return this;
     }
 
     /**
      * Assigns {@link org.apache.http.nio.protocol.HttpAsyncExpectationVerifier} instance.
      */
     public final ServerBootstrap setExpectationVerifier(final HttpAsyncExpectationVerifier expectationVerifier) {
         this.expectationVerifier = expectationVerifier;
         return this;
     }
 
     /**
      * Assigns {@link org.apache.http.nio.NHttpConnectionFactory} instance.
      */
     public final ServerBootstrap setConnectionFactory(
             final NHttpConnectionFactory<? extends DefaultNHttpServerConnection> connectionFactory) {
         this.connectionFactory = connectionFactory;
         return this;
     }
 
     /**
      * Assigns {@link javax.net.ssl.SSLContext} instance.
      * <p>
      * Please note this value can be overridden by the {@link #setConnectionFactory(
      *   org.apache.http.nio.NHttpConnectionFactory)} method.
      */
     public final ServerBootstrap setSslContext(final SSLContext sslContext) {
         this.sslContext = sslContext;
         return this;
     }
 
     /**
      * Assigns {@link org.apache.http.nio.reactor.ssl.SSLSetupHandler} instance.
      * <p>
      * Please note this value can be overridden by the {@link #setConnectionFactory(
      *   org.apache.http.nio.NHttpConnectionFactory)} method.
      */
     public ServerBootstrap setSslSetupHandler(final SSLSetupHandler sslSetupHandler) {
         this.sslSetupHandler = sslSetupHandler;
         return this;
     }
 
     /**
      * Assigns {@link org.apache.http.ExceptionLogger} instance.
      */
     public final ServerBootstrap setExceptionLogger(final ExceptionLogger exceptionLogger) {
         this.exceptionLogger = exceptionLogger;
         return this;
     }
 
     public HttpServer create() {
 
         HttpProcessor httpProcessorCopy = this.httpProcessor;
         if (httpProcessorCopy == null) {
 
             final HttpProcessorBuilder b = HttpProcessorBuilder.create();
             if (requestFirst != null) {
                 for (final HttpRequestInterceptor i: requestFirst) {
                     b.addFirst(i);
                 }
             }
             if (responseFirst != null) {
                 for (final HttpResponseInterceptor i: responseFirst) {
                     b.addFirst(i);
                 }
             }
 
             String serverInfoCopy = this.serverInfo;
             if (serverInfoCopy == null) {
                 serverInfoCopy = "Apache-HttpCore-NIO/1.1";
             }
 
             b.addAll(
                     new ResponseDate(),
                     new ResponseServer(serverInfoCopy),
                     new ResponseContent(),
                     new ResponseConnControl());
             if (requestLast != null) {
                 for (final HttpRequestInterceptor i: requestLast) {
                     b.addLast(i);
                 }
             }
             if (responseLast != null) {
                 for (final HttpResponseInterceptor i: responseLast) {
                     b.addLast(i);
                 }
             }
             httpProcessorCopy = b.build();
         }
 
         HttpAsyncRequestHandlerMapper handlerMapperCopy = this.handlerMapper;
         if (handlerMapperCopy == null) {
             final UriHttpAsyncRequestHandlerMapperndlerMapper.html#UriHttpAsyncRequestHandlerMapper">UriHttpAsyncRequestHandlerMapper reqistry = new UriHttpAsyncRequestHandlerMapper();
             if (handlerMap != null) {
                 for (final Map.Entry<String, HttpAsyncRequestHandler<?>> entry: handlerMap.entrySet()) {
                     reqistry.register(entry.getKey(), entry.getValue());
                 }
             }
             handlerMapperCopy = reqistry;
         }
 
         ConnectionReuseStrategy connStrategyCopy = this.connStrategy;
         if (connStrategyCopy == null) {
             connStrategyCopy = DefaultConnectionReuseStrategy.INSTANCE;
         }
 
         HttpResponseFactory responseFactoryCopy = this.responseFactory;
         if (responseFactoryCopy == null) {
             responseFactoryCopy = DefaultHttpResponseFactory.INSTANCE;
         }
 
         NHttpConnectionFactory<? extends DefaultNHttpServerConnection> connectionFactoryCopy = this.connectionFactory;
         if (connectionFactoryCopy == null) {
             if (this.sslContext != null) {
                 connectionFactoryCopy = new SSLNHttpServerConnectionFactory(
                         this.sslContext, this.sslSetupHandler, this.connectionConfig);
             } else {
                 connectionFactoryCopy = new DefaultNHttpServerConnectionFactory(this.connectionConfig);
             }
         }
 
         ExceptionLogger exceptionLoggerCopy = this.exceptionLogger;
         if (exceptionLoggerCopy == null) {
             exceptionLoggerCopy = ExceptionLogger.NO_OP;
         }
 
         final HttpAsyncServicecService.html#HttpAsyncService">HttpAsyncService httpService = new HttpAsyncService(
                 httpProcessorCopy, connStrategyCopy, responseFactoryCopy, handlerMapperCopy,
                 this.expectationVerifier, exceptionLoggerCopy);
 
         return new HttpServer(this.listenerPort, this.localAddress, this.ioReactorConfig,
                 httpService, connectionFactoryCopy, exceptionLoggerCopy);
 
     }
 
 }