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/*
 * 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.tuscany.sca.binding.jms.provider;

import java.util.ArrayList;
import java.util.List;

import org.apache.tuscany.sca.binding.jms.impl.JMSBinding;
import org.apache.tuscany.sca.binding.jms.impl.JMSBindingConstants;
import org.apache.tuscany.sca.binding.jms.impl.JMSBindingException;
import org.apache.tuscany.sca.interfacedef.InterfaceContract;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.invocation.Invoker;
import org.apache.tuscany.sca.provider.ReferenceBindingProvider;
import org.apache.tuscany.sca.runtime.RuntimeComponent;
import org.apache.tuscany.sca.runtime.RuntimeComponentReference;


/**
 * Implementation of the JMS reference binding provider.
 * 
 * @version $Rev$ $Date$
 */
public class JMSBindingReferenceBindingProvider implements ReferenceBindingProvider {

    private RuntimeComponentReference reference;
    private JMSBinding                jmsBinding;
    private List<JMSBindingInvoker>   jmsBindingInvokers = new ArrayList<JMSBindingInvoker>();

    public JMSBindingReferenceBindingProvider(RuntimeComponent component,
                                              RuntimeComponentReference reference,
                                              JMSBinding binding) {
        this.reference  = reference;
        this.jmsBinding = binding;         
        
    }

    public Invoker createInvoker(Operation operation, boolean isCallback) {
 
        if (jmsBinding.getDestinationName().equals(JMSBindingConstants.DEFAULT_DESTINATION_NAME)){
            throw new JMSBindingException("No destination specified for reference " +
                                          reference.getName());            
        }
        
        if (jmsBinding.getResponseDestinationName().equals(JMSBindingConstants.DEFAULT_RESPONSE_DESTINATION_NAME)){
            throw new JMSBindingException("No response destination specified for reference " +
                                          reference.getName());            
        }        
/* The following doesn't work as I can't get to the 
 * target list on the composite reference
        // if the default destination queue name is set
        // set the destination queue name to the wired service name
        // so that any wires can be assured a unique endpoint.
        
        if (jmsBinding.getDestinationName().equals(JMSBindingConstants.DEFAULT_DESTINATION_NAME)){
            // get the name of the target service
            List<ComponentService> targets = reference.getTargets();
            
            if (targets.size() < 1){
                throw new JMSBindingException("No target specified for reference " +
                                              reference.getName() +
                                              " so destination queue name can't be determined");
            }
            
            if (targets.size() > 1){
                throw new JMSBindingException("More than one target specified for reference " +
                                              reference.getName() +
                                              " so destination queue name can't be determined");
            }
            
            ComponentService service = targets.get(0);
            jmsBinding.setDestinationName(service.getName());
        }
        
        
        // if the default response queue name is set 
        // set the response queue to the names of this 
        // reference
        if (jmsBinding.getResponseDestinationName().equals(JMSBindingConstants.DEFAULT_RESPONSE_DESTINATION_NAME)){
            jmsBinding.setResponseDestinationName(reference.getName());
        }    
*/        
        if (isCallback) {
            throw new UnsupportedOperationException();
        } else {
            JMSBindingInvoker invoker =  new JMSBindingInvoker(jmsBinding,
                                                               operation); 
            jmsBindingInvokers.add(invoker);
            return invoker;
        }
    }

    public InterfaceContract getBindingInterfaceContract() {
        return reference.getInterfaceContract();
    }

    public void start() {
        
    }

    public void stop() {
        try {
            for (JMSBindingInvoker invoker : jmsBindingInvokers) {
                invoker.stop();
                
            }
        } catch (Exception e) {
            throw new JMSBindingException("Error stopping JMSReferenceBinding", e);
        }        
    }

}