/***********************************************************************
 * Copyright (c) 2008 by SAP AG, Walldorf. 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     SAP AG - initial API and implementation
 ***********************************************************************/
package org.eclipse.jst.jee.ui.internal.navigator;

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

import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jst.j2ee.model.IModelProvider;
import org.eclipse.jst.j2ee.project.facet.IJ2EEFacetConstants;
import org.eclipse.jst.javaee.ejb.EJBJar;
import org.eclipse.jst.javaee.ejb.EntityBean;
import org.eclipse.jst.javaee.ejb.MessageDrivenBean;
import org.eclipse.jst.javaee.ejb.SessionBean;
import org.eclipse.jst.jee.ui.internal.navigator.JndiRefNode.KINDS;
import org.eclipse.jst.jee.ui.internal.navigator.ejb.ActivationConfigProperties;
import org.eclipse.jst.jee.ui.internal.navigator.ejb.BeanInterfaceNode;
import org.eclipse.jst.jee.ui.internal.navigator.ejb.BeanNode;
import org.eclipse.jst.jee.ui.internal.navigator.ejb.GroupEJBProvider;
import org.eclipse.jst.jee.ui.plugin.JEEUIPlugin;
import org.eclipse.wst.common.project.facet.core.IFacetedProject;
import org.eclipse.wst.common.project.facet.core.IProjectFacetVersion;
import org.eclipse.wst.common.project.facet.core.ProjectFacetsManager;

/**
 * Ejb 3.0 Content provider is Deployment Descriptor content provider, 
 * used for constructing of the descriptor tree in project explorer. 
 * 
 * @author Dimitar Giormov
 */
public class Ejb3ContentProvider extends JEE5ContentProvider {


	public Object[] getChildren(Object aParentElement) {
		List<Object> children = new ArrayList<Object>();
		IProject project = null;

		if (aParentElement instanceof AbstractGroupProvider) {
			List lst = ((AbstractGroupProvider) aParentElement).getChildren();
			children.addAll(lst);
		} else if (aParentElement instanceof AbstractDDNode) {
			List lst = ((AbstractDDNode) aParentElement).getChildren();
			children.addAll(lst);
		} else if (aParentElement instanceof SessionBean) {
			SessionBean sb = ((SessionBean)aParentElement);
			addSessionBeanSubNodes(sb, children);

		} else if (aParentElement instanceof EntityBean) {
			EntityBean eb = ((EntityBean)aParentElement);

			addEntityBeanSubNodes(eb, children);

		} else if (aParentElement instanceof MessageDrivenBean) {
			Object msgBean = new BeanNode((MessageDrivenBean) aParentElement);
			addActivationConfigProperties((MessageDrivenBean) aParentElement, children);
			children.add(msgBean);
		} else 
			if (aParentElement instanceof IAdaptable) {
				project = (IProject) ((IAdaptable) aParentElement)
				.getAdapter(IPROJECT_CLASS);
				if (project != null) {
					if (isEjbModuleProject(project)) {
						IModelProvider modelProvider = getCachedModelProvider(project);
						GroupEJBProvider element = new GroupEJBProvider((EJBJar) modelProvider.getModelObject());
						element.setProjectName(project.getName());
						children.add(element);
					}
				}
			}
		return children.toArray();
	}

	private void addActivationConfigProperties(MessageDrivenBean parentElement,
			List<Object> children) {
		if (parentElement.getActivationConfig() != null && parentElement.getActivationConfig().getActivationConfigProperties() != null && !parentElement.getActivationConfig().getActivationConfigProperties().isEmpty()){
			children.add(new ActivationConfigProperties(parentElement.getActivationConfig().getActivationConfigProperties()));
		}
	}

	private void addEntityBeanSubNodes(EntityBean eb, List<Object> children) {
		if (eb.getLocal() != null) {
			children.add(new BeanInterfaceNode(eb, (String)eb.getLocal(), BeanInterfaceNode.KINDS.LOCAL));
		}
		if (eb.getLocalHome() != null) {
			children.add(new BeanInterfaceNode(eb, (String)eb.getLocalHome(), BeanInterfaceNode.KINDS.LOCAL_HOME));
		}

		if (eb.getRemote() != null) {
			children.add(new BeanInterfaceNode(eb, (String)eb.getRemote(), BeanInterfaceNode.KINDS.REMOTE));
		}
		if (eb.getHome() != null) {
			children.add(new BeanInterfaceNode(eb, (String)eb.getHome(), BeanInterfaceNode.KINDS.REMOTE_HOME));
		}


		children.add(new BeanNode((EntityBean) eb));

	}

	private void addSessionBeanSubNodes(SessionBean sb, List children) {
		addClassRelatedInfo(sb, children);
		addSessionJNDIRefInfo(sb, children);
	}

	private void addSessionJNDIRefInfo(SessionBean sb, List children) {
		if (sb.getEjbLocalRefs() != null && !sb.getEjbLocalRefs().isEmpty()){
			children.add(new JndiRefNode(sb.getEjbLocalRefs(), KINDS.EJBLOCALREF));
		}

		if (sb.getEjbRefs() != null && !sb.getEjbRefs().isEmpty()){
			children.add(new JndiRefNode(sb.getEjbRefs(), KINDS.EJBREF));
		}

		if (sb.getResourceEnvRefs() != null && !sb.getResourceEnvRefs().isEmpty()){
			children.add(new JndiRefNode(sb.getResourceEnvRefs(), KINDS.RESENVENTY));
		}
		if (sb.getEnvEntries() != null && !sb.getEnvEntries().isEmpty()){
			children.add(new JndiRefNode(sb.getEnvEntries(), KINDS.ENVENTRY));
		}

		if (sb.getResourceRefs() != null && !sb.getResourceRefs().isEmpty()){
			children.add(new JndiRefNode(sb.getResourceRefs(), KINDS.RESREF));
		}

		if (sb.getServiceRefs() != null && !sb.getServiceRefs().isEmpty()){
			children.add(new JndiRefNode(sb.getServiceRefs(), KINDS.SERVICEREF));
		}
	}

	private void addSessionJNDIRefInfo(EntityBean eb, List children) {
		if (eb.getEjbLocalRefs() != null && !eb.getEjbLocalRefs().isEmpty()){
			children.add(new JndiRefNode(eb.getEjbLocalRefs(), KINDS.EJBLOCALREF));
		}

		if (eb.getEjbRefs() != null && !eb.getEjbRefs().isEmpty()){
			children.add(new JndiRefNode(eb.getEjbRefs(), KINDS.EJBREF));
		}

		if (eb.getResourceEnvRefs() != null && !eb.getResourceEnvRefs().isEmpty()){
			children.add(new JndiRefNode(eb.getResourceEnvRefs(), KINDS.RESENVENTY));
		}
		if (eb.getEnvEntries() != null && !eb.getEnvEntries().isEmpty()){
			children.add(new JndiRefNode(eb.getEnvEntries(), KINDS.ENVENTRY));
		}

		if (eb.getResourceRefs() != null && !eb.getResourceRefs().isEmpty()){
			children.add(new JndiRefNode(eb.getResourceRefs(), KINDS.RESREF));
		}

		if (eb.getServiceRefs() != null && !eb.getServiceRefs().isEmpty()){
			children.add(new JndiRefNode(eb.getServiceRefs(), KINDS.SERVICEREF));
		}
	}

	private void addClassRelatedInfo(SessionBean sb, List children) {
		if (sb.getLocal() != null) {
			children.add(new BeanInterfaceNode(sb, (String)sb.getLocal(), BeanInterfaceNode.KINDS.LOCAL));
		}
		if (sb.getLocalHome() != null) {
			children.add(new BeanInterfaceNode(sb, (String)sb.getLocalHome(), BeanInterfaceNode.KINDS.LOCAL_HOME));
		}

		if (sb.getRemote() != null) {
			children.add(new BeanInterfaceNode(sb, (String)sb.getRemote(), BeanInterfaceNode.KINDS.REMOTE));
		}
		if (sb.getHome() != null) {
			children.add(new BeanInterfaceNode(sb, (String)sb.getHome(), BeanInterfaceNode.KINDS.REMOTE_HOME));
		}


		children.add(new BeanNode((SessionBean) sb));
		List r = sb.getBusinessLocals();
		for (Object locals : r) {
			children.add(new BeanInterfaceNode(sb, (String)locals, BeanInterfaceNode.KINDS.BUSSINESS_LOCAL));
		}
		r = sb.getBusinessRemotes();
		for (Object locals : r) {
			children.add(new BeanInterfaceNode(sb, (String)locals, BeanInterfaceNode.KINDS.BUSSINESS_REMOTE));
		}
	}

	private boolean isEjbModuleProject(IProject project) {
		try {
			IFacetedProject facetedProject = ProjectFacetsManager.create(project);
			IProjectFacetVersion installedVersion = facetedProject.getInstalledVersion(ProjectFacetsManager.getProjectFacet(IJ2EEFacetConstants.EJB).getVersion(IJ2EEFacetConstants.EJB_30.getVersionString()).getProjectFacet());
			return installedVersion != null;
		} catch (CoreException e) {
			JEEUIPlugin.logError("Can not acces project", e); //$NON-NLS-1$
		}
		return false;
	}

	public boolean hasChildren(Object element) {
		if (element instanceof AbstractGroupProvider) {
			return ((AbstractGroupProvider) element).hasChildren();
		} else if (element instanceof AbstractDDNode) {
			return ((AbstractDDNode) element).hasChildren();
		} else if (element instanceof SessionBean) {
			return true;
		} else if (element instanceof EntityBean) {
			return true;
		}else if (element instanceof MessageDrivenBean) {
			return true;
		} else
			return false;
	}

	public Object getParent(Object element) {
		return null;
	}

	public Object[] getElements(Object inputElement) {
		return getChildren(inputElement);
	}

}