/*
 * Copyright 2011 Federal Chancellery Austria and
 * Graz University of Technology
 * 
 * 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 at.gv.util;

import java.io.ByteArrayOutputStream;
import java.io.OutputStreamWriter;
import java.util.Arrays;
import java.util.Base64;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

import javax.xml.namespace.QName;
import javax.xml.soap.SOAPMessage;
import javax.xml.ws.handler.MessageContext;
import javax.xml.ws.handler.soap.SOAPHandler;
import javax.xml.ws.handler.soap.SOAPMessageContext;

import org.apache.cxf.message.Message;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Handler to log JAX-WS messages to slf4j logging framework. Does currently not
 * distinguish between incomig and outgoing messages.
 * 
 * @author <a href="mailto:Arne.Tauber@egiz.gv.at">Arne Tauber</a>
 * 
 */
public class LoggingHandler implements SOAPHandler<SOAPMessageContext> {

	Logger log = LoggerFactory.getLogger(LoggingHandler.class);

	@Override
	public boolean handleMessage(SOAPMessageContext context) {
		final SOAPMessage msg = context.getMessage();
		final boolean request = ((Boolean) context
		    .get(SOAPMessageContext.MESSAGE_OUTBOUND_PROPERTY)).booleanValue();
		final ByteArrayOutputStream bos = new ByteArrayOutputStream();

		try {
			if (request) {
				msg.writeTo(bos);
			} else { // This is the response message
				msg.writeTo(bos);
			}
			
			final OutputStreamWriter writer = new OutputStreamWriter(bos);
			writer.getEncoding();
			
			//log.trace(bos.toString());			
			log.trace(new String(bos.toByteArray()));
			log.trace("B64: " + Base64.getEncoder().encodeToString(bos.toByteArray()));
			final Map<String, List> headers = (Map<String, List>) context.get(Message.PROTOCOL_HEADERS);
			if (headers != null) {
				for (final Entry<String, List> el : headers.entrySet()) {
					if (el.getValue() != null)
						log.trace("Header: " + el.getKey() + " | Value: " + Arrays.toString(el.getValue().toArray()));
					else
						log.trace("Header: " + el.getKey() + " | Value: " + "'null'");
					
				}
			
				
			} else
				log.trace("No HTTP headers");
				
			
		} catch (final Exception e) {
			log.trace(e.getMessage(), e);
		}
		return true;
	}

	@Override
	public boolean handleFault(SOAPMessageContext context) {
		return handleMessage(context);
	}

	@Override
	public void close(MessageContext context) {
	}

	@Override
	public Set<QName> getHeaders() {
		return null;
	}

}