/*
 * 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.context;

import org.apache.tuscany.sca.assembly.Composite;
import org.apache.tuscany.sca.assembly.Endpoint;
import org.apache.tuscany.sca.assembly.EndpointReference;
import org.apache.tuscany.sca.core.ExtensionPointRegistry;
import org.apache.tuscany.sca.invocation.Message;
import org.apache.tuscany.sca.runtime.EndpointRegistry;
import org.apache.tuscany.sca.runtime.RuntimeComponent;
import org.apache.tuscany.sca.runtime.RuntimeComponentContext;

/**
 * The context associated with the Node that provides access to ExtensionPointRegistry and EndpointRegistry
 * 
 * @version $Rev$ $Date$
 */
public class CompositeContext {
    protected final static InheritableThreadLocal<CompositeContext> context = new InheritableThreadLocal<CompositeContext>();
    protected ExtensionPointRegistry extensionPointRegistry;
    protected EndpointRegistry endpointRegistry;
    protected ComponentContextFactory componentContextFactory;
    protected Composite domainComposite;
    
    public CompositeContext(ExtensionPointRegistry registry, EndpointRegistry endpointRegistry, Composite domainComposite) {
        this.extensionPointRegistry = registry;
        this.endpointRegistry = endpointRegistry;
        ContextFactoryExtensionPoint contextFactories = registry.getExtensionPoint(ContextFactoryExtensionPoint.class);
        this.componentContextFactory = contextFactories.getFactory(ComponentContextFactory.class);
        this.domainComposite = domainComposite;
    }    
    
    public CompositeContext(ExtensionPointRegistry registry, EndpointRegistry endpointRegistry) {
        this(registry, endpointRegistry, null);
    }
    
    /**
     * @return
     */
    public static RuntimeComponent getCurrentComponent() {
        Message message = ThreadMessageContext.getMessageContext();
        if (message != null) {
            Endpoint to = message.getTo();
            if (to == null) {
                return null;
            }
            RuntimeComponent component = (RuntimeComponent)message.getTo().getComponent();
            return component;
        }
        return null;
    }

    /**
     * @return
     */
    public static CompositeContext getCurrentCompositeContext() {
        RuntimeComponent component = getCurrentComponent();
        if (component != null) {
            RuntimeComponentContext componentContext = component.getComponentContext();
            return componentContext.getCompositeContext();
        }
        CompositeContext compositeContext = context.get();
        if (compositeContext != null) {
            return compositeContext;
        }
        return null;
    }

    public void bindComponent(RuntimeComponent runtimeComponent) {
        RuntimeComponentContext componentContext =
            (RuntimeComponentContext)componentContextFactory.createComponentContext(this, runtimeComponent);
        runtimeComponent.setComponentContext(componentContext);
    }    
    /**
     * 
     * @param endpointReference
     */
    public void bindEndpointReference(EndpointReference endpointReference) {
        
    }

    /**
     * Get the ExtensionPointRegistry for this node
     * @return The ExtensionPointRegistry
     */
    public ExtensionPointRegistry getExtensionPointRegistry() {
        return extensionPointRegistry;
    }

    /**
     * Get the EndpointRegistry
     * @return The EndpointRegistry for this node
     */
    public EndpointRegistry getEndpointRegistry() {
        return endpointRegistry; 
    }
    
    public Composite getDomainComposite() {
        return domainComposite; 
    }
    
    public static void setThreadCompositeContext(CompositeContext value) {
        context.set(value);
    }
    
    public static void removeCompositeContext() {
        context.remove();
    }
}