/*
 * 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.node.impl;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;

import org.apache.tuscany.sca.assembly.Component;
import org.apache.tuscany.sca.assembly.Composite;
import org.apache.tuscany.sca.core.assembly.ActivationException;
import org.apache.tuscany.sca.core.assembly.RuntimeComponentImpl;
import org.apache.tuscany.sca.host.embedded.impl.ReallySmallRuntime;
import org.apache.tuscany.sca.node.spi.ComponentListener;
import org.apache.tuscany.sca.node.spi.ComponentManager;

/**
 *
 * @version $Rev$ $Date$
 */
public class ComponentManagerServiceImpl implements ComponentManager {

    protected List<ComponentListener> listeners = new CopyOnWriteArrayList<ComponentListener>();
    protected String domainURI;
    protected String nodeName;
    protected Composite nodeComposite;
    protected ReallySmallRuntime nodeRuntime;
    
    public ComponentManagerServiceImpl(String domainURI, String nodeName, Composite nodeComposite, ReallySmallRuntime nodeRuntime) {
        this.domainURI = domainURI;
        this.nodeName = nodeName;
        this.nodeComposite = nodeComposite;
        this.nodeRuntime = nodeRuntime;
    }

    public void addComponentListener(ComponentListener listener) {
        this.listeners.add(listener);
    }

    public void removeComponentListener(ComponentListener listener) {
        this.listeners.remove(listener);
    }

    public Component getComponent(String componentName) {
        for (Composite composite: nodeComposite.getIncludes()) {
            for (Component component: composite.getComponents()) {
                if (component.getName().equals(componentName)) {
                    return component;
                }
            }
        }
        return null;
    }
    
    public List<Component> getComponents() {
        List<Component> components = new ArrayList<Component>();
        for (Composite composite: nodeComposite.getIncludes()) {
            components.addAll(composite.getComponents());
        }
        return components;
    }

    public void startComponent(Component component) throws ActivationException {
        nodeRuntime.getCompositeActivator().start(component);
        notifyComponentStarted(component);
    }

    public void stopComponent(Component component) throws ActivationException {
        nodeRuntime.getCompositeActivator().stop(component);
        notifyComponentStopped(component);
    }

    public void notifyComponentStarted(Component component) {
        for (ComponentListener listener : listeners) {
            try {
                listener.componentStarted(component);
            } catch (Exception e) {
                e.printStackTrace(); // TODO: log
            }
        }
    }

    public void notifyComponentStopped(Component component) {
        for (ComponentListener listener : listeners) {
            try {
                listener.componentStopped(component);
            } catch (Exception e) {
                e.printStackTrace(); // TODO: log
            }
        }
    }

    public boolean isComponentStarted(Component component) {
        RuntimeComponentImpl runtimeComponent = (RuntimeComponentImpl)component;
        return runtimeComponent.isStarted();
    }

}