/*
    * Copyright 2002-2014 the original author or authors.
    *
    * Licensed 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.
   */
  
  package org.springframework.web.socket.sockjs.client;
  
  import java.net.InetSocketAddress;
  import java.net.URI;
  import java.util.List;
  
  import org.springframework.util.Assert;
  import org.springframework.util.concurrent.SettableListenableFuture;
  import org.springframework.web.socket.CloseStatus;
  import org.springframework.web.socket.TextMessage;
  import org.springframework.web.socket.WebSocketExtension;
  import org.springframework.web.socket.WebSocketHandler;
  import org.springframework.web.socket.WebSocketSession;
  import org.springframework.web.socket.sockjs.transport.TransportType;
  
  
  /**
   * An extension of {@link AbstractClientSockJsSession} for use with HTTP
   * transports simulating a WebSocket session.
   *
   * @author Rossen Stoyanchev
   * @since 4.1
   */
  public class XhrClientSockJsSession extends AbstractClientSockJsSession {
  
  	private final URI sendUrl;
  
  	private final XhrTransport transport;
  
  	private int textMessageSizeLimit = -1;
  
  	private int binaryMessageSizeLimit = -1;
  
  
  	public XhrClientSockJsSession(TransportRequest request, WebSocketHandler handler,
  			XhrTransport transport, SettableListenableFuture<WebSocketSession> connectFuture) {
  
  		super(request, handler, connectFuture);
  		Assert.notNull(transport, "'restTemplate' is required");
  		this.sendUrl = request.getSockJsUrlInfo().getTransportUrl(TransportType.XHR_SEND);
  		this.transport = transport;
  	}
  
  
  	@Override
  	public InetSocketAddress getLocalAddress() {
  		return null;
  	}
  
  	@Override
  	public InetSocketAddress getRemoteAddress() {
  		return new InetSocketAddress(getUri().getHost(), getUri().getPort());
  	}
  
  	@Override
  	public String getAcceptedProtocol() {
  		return null;
  	}
  
  	@Override
  	public void setTextMessageSizeLimit(int messageSizeLimit) {
  		this.textMessageSizeLimit = messageSizeLimit;
  	}
  
  	@Override
  	public int getTextMessageSizeLimit() {
  		return this.textMessageSizeLimit;
  	}
  
  	@Override
  	public void setBinaryMessageSizeLimit(int messageSizeLimit) {
  		this.binaryMessageSizeLimit = -1;
  	}
  
  	@Override
  	public int getBinaryMessageSizeLimit() {
  		return this.binaryMessageSizeLimit;
  	}
  
  	@Override
  	public List<WebSocketExtension> getExtensions() {
  		return null;
  	}
 
 	@Override
 	protected void sendInternal(TextMessage message) {
 		this.transport.executeSendRequest(this.sendUrl, message);
 	}
 
 	@Override
 	protected void disconnect(CloseStatus status) {
 		// Nothing to do, XHR transports check if session is disconnected
 	}
 
 }