/*
 * Copyright 2013 Red Hat Inc. and/or its affiliates and other contributors.
 *
 * 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.switchyard.deploy.karaf;

import javax.xml.namespace.QName;

import org.apache.felix.gogo.commands.Argument;
import org.apache.felix.gogo.commands.Command;
import org.switchyard.admin.Application;
import org.switchyard.admin.Binding;
import org.switchyard.admin.Reference;
import org.switchyard.admin.Service;
import org.switchyard.admin.SwitchYard;

/**
 * Shell command for uses-artifact.
 */
@Command(scope = "switchyard", name = "gateway", description = "Perform an operation on a gateway.")
public class GatewayCommand extends AbstractSwitchYardServiceCommand {

    /**
     * Specifies the type: start, stop.
     */
    public static enum OperationType {
        /** start operation. */
        start,
        /** stop operation. */
        stop;
    }

    @Argument(index = 0, name = "operation", description = "Specifies the operation type [start | stop].", required = true)
    private OperationType _operation;

    @Argument(index = 1, name = "application", description = "Specifies the name of the application containing the binding.", required = true)
    private String _application;

    @Argument(index = 2, name = "service", description = "Specifies the name of the service containing the binding.", required = true)
    private String _service;

    @Argument(index = 3, name = "binding", description = "Specifies the name of the binding.", required = true)
    private String _binding;

    @Override
    protected Object doExecute(final SwitchYard switchYard) throws Exception {
        final Application application = switchYard.getApplication(QName.valueOf(_application));
        if (application == null) {
            System.err.println("Could not locate application: " + _application);
            return null;
        }
        final Binding binding;
        final QName serviceName = QName.valueOf(_service);
        final Service service = application.getService(serviceName);
        if (service == null) {
            final Reference reference = application.getReference(serviceName);
            if (reference == null) {
                System.err.println("Could not locate service or reference: " + _service);
                return null;
            }
            binding = reference.getGateway(_binding);
        } else {
            binding = service.getGateway(_binding);
        }
        if (binding == null) {
            System.err.println("Could not locate binding: " + _binding);
            return null;
        }
        switch (_operation) {
        case start:
            binding.start();
            break;
        case stop:
            binding.stop();
            break;

        }
        return null;
    }

}