/*
 *
 * 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.
 *
 */
package org.apache.qpid.client.handler;

import org.apache.qpid.AMQChannelClosedException;
import org.apache.qpid.AMQException;
import org.apache.qpid.AMQInvalidRoutingKeyException;
import org.apache.qpid.client.AMQNoConsumersException;
import org.apache.qpid.client.AMQNoRouteException;
import org.apache.qpid.client.protocol.AMQProtocolSession;
import org.apache.qpid.client.state.AMQStateManager;
import org.apache.qpid.client.state.StateAwareMethodListener;
import org.apache.qpid.framing.AMQFrame;
import org.apache.qpid.framing.AMQShortString;
import org.apache.qpid.framing.ChannelCloseBody;
import org.apache.qpid.framing.ChannelCloseOkBody;
import org.apache.qpid.protocol.AMQConstant;
import org.apache.qpid.protocol.AMQMethodEvent;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class ChannelCloseMethodHandler implements StateAwareMethodListener<ChannelCloseBody>
{
    private static final Logger _logger = LoggerFactory.getLogger(ChannelCloseMethodHandler.class);

    private static ChannelCloseMethodHandler _handler = new ChannelCloseMethodHandler();

    public static ChannelCloseMethodHandler getInstance()
    {
        return _handler;
    }

    public void methodReceived(AMQStateManager stateManager, ChannelCloseBody method, int channelId)
        throws AMQException
    {
        _logger.debug("ChannelClose method received");
        final AMQProtocolSession session = stateManager.getProtocolSession();


        AMQConstant errorCode = AMQConstant.getConstant(method.getReplyCode());
        AMQShortString reason = method.getReplyText();
        if (_logger.isDebugEnabled())
        {
            _logger.debug("Channel close reply code: " + errorCode + ", reason: " + reason);
        }



        ChannelCloseOkBody body = session.getMethodRegistry().createChannelCloseOkBody();
        AMQFrame frame = body.generateFrame(channelId);
        session.writeFrame(frame);

        if (errorCode != AMQConstant.REPLY_SUCCESS)
        {
            if (_logger.isDebugEnabled())
            {
                _logger.debug("Channel close received with errorCode " + errorCode + ", and reason " + reason);
            }

            if (errorCode == AMQConstant.NO_CONSUMERS)
            {
                throw new AMQNoConsumersException("Error: " + reason, null);
            }
            else if (errorCode == AMQConstant.NO_ROUTE)
            {
                throw new AMQNoRouteException("Error: " + reason, null);
            }
            else if (errorCode == AMQConstant.INVALID_ARGUMENT)
            {
                _logger.debug("Broker responded with Invalid Argument.");

                throw new org.apache.qpid.AMQInvalidArgumentException(String.valueOf(reason));
            }
            else if (errorCode == AMQConstant.INVALID_ROUTING_KEY)
            {
                _logger.debug("Broker responded with Invalid Routing Key.");

                throw new AMQInvalidRoutingKeyException(String.valueOf(reason));
            }
            else
            {
                throw new AMQChannelClosedException(errorCode, "Error: " + reason);
            }

        }
        // fixme why is this only done when the close is expected...
        // should the above forced closes not also cause a close?
        // ----------
        // Closing the session only when it is expected allows the errors to be processed
        // Calling this here will prevent failover. So we should do this for all exceptions
        // that should never cause failover. Such as authentication errors.

        session.channelClosed(channelId, errorCode, String.valueOf(reason));
    }
}
