/*
 *
 * 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.qmf;

import org.apache.log4j.Logger;

import org.apache.qpid.AMQException;
import org.apache.qpid.server.exchange.Exchange;
import org.apache.qpid.server.message.ServerMessage;
import org.apache.qpid.server.queue.BaseQueue;
import org.apache.qpid.server.virtualhost.VirtualHost;
import org.apache.qpid.transport.codec.BBDecoder;

import java.util.List;
import java.util.UUID;

public class QMFMethodRequestCommand extends QMFCommand
{
    private static final Logger _qmfLogger = Logger.getLogger("qpid.qmf");

    private QMFMethodInvocation _methodInstance;
    private QMFObject _object;

    public QMFMethodRequestCommand(final QMFCommandHeader header, final BBDecoder decoder, final QMFService qmfService)
    {
        super(header);
        UUID objectId = decoder.readUuid();
        String packageName = decoder.readStr8();
        String className = decoder.readStr8();
        byte[] hash = decoder.readBin128();
        String methodName = decoder.readStr8();

        QMFPackage qmfPackage = qmfService.getPackage(packageName);
        QMFClass qmfClass = qmfPackage.getQMFClass(className);
        _object = qmfService.getObjectById(qmfClass, objectId);
        QMFMethod method = qmfClass.getMethod(methodName);
        _methodInstance = method.parse(decoder);

    }

    public void process(final VirtualHost virtualHost, final ServerMessage message)
    {
        String exchangeName = message.getMessageHeader().getReplyToExchange();
        String queueName = message.getMessageHeader().getReplyToRoutingKey();

        QMFCommand[] commands = new QMFCommand[2];

        _qmfLogger.debug("Execute: " + _methodInstance + " on " + _object);

        commands[0] = _methodInstance.execute(_object, this);
        commands[1] = new QMFCommandCompletionCommand(this);

        Exchange exchange = virtualHost.getExchangeRegistry().getExchange(exchangeName);

        for(QMFCommand cmd : commands)
        {
            QMFMessage responseMessage = new QMFMessage(queueName, cmd);


            List<? extends BaseQueue> queues = exchange.route(responseMessage);


            for(BaseQueue q : queues)
            {
                try
                {
                    q.enqueue(responseMessage);
                }
                catch (AMQException e)
                {
                    e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
                }
            }
        }

    }
}