/*******************************************************************************
 * Copyright (c) 2005, 2007 IBM Corporation and others.
 * 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jst.j2ee.internal.webservice.componentcore.util;

import java.util.List;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.jst.j2ee.componentcore.EnterpriseArtifactEdit;
import org.eclipse.jst.j2ee.internal.J2EEConstants;
import org.eclipse.jst.j2ee.model.IModelProvider;
import org.eclipse.jst.j2ee.project.JavaEEProjectUtilities;
import org.eclipse.jst.j2ee.webservice.wsclient.WebServicesClient;
import org.eclipse.jst.j2ee.webservice.wsclient.WebServicesResource;
import org.eclipse.jst.j2ee.webservice.wsclient.Webservice_clientFactory;
import org.eclipse.wst.common.componentcore.ComponentCore;
import org.eclipse.wst.common.componentcore.ModuleCoreNature;
import org.eclipse.wst.common.componentcore.UnresolveableURIException;
import org.eclipse.wst.common.componentcore.internal.ArtifactEditModel;
import org.eclipse.wst.common.componentcore.resources.IVirtualComponent;

/**
 * <p>
 * WSDDArtifactEdit obtains a WS Deployment Descriptor metamodel specifec data
 * from a {@see org.eclipse.jst.j2ee.ejb.EJBResource}&nbsp; which stores the
 * metamodel. The {@see org.eclipse.jst.j2ee.ejb.EJBResource}&nbsp;is retrieved
 * from the {@see org.eclipse.wst.common.modulecore.ArtifactEditModel}&nbsp;using
 * a constant {@see J2EEConstants#EJBJAR_DD_URI_OBJ}. The defined methods
 * extract data or manipulate the contents of the underlying resource.
 * </p>
 */
public class WSCDDArtifactEdit extends EnterpriseArtifactEdit {

	/**
	 * <p>
	 * Identifier used to link WSDDArtifactEdit to a WsddAdapterFactory {@see
	 * WsddAdapterFactory} stored in an AdapterManger (@see AdapterManager)
	 * </p>
	 */

	public static final Class ADAPTER_TYPE = WSCDDArtifactEdit.class;

	/**
	 * @param aHandle
	 * @param toAccessAsReadOnly
	 * @throws IllegalArgumentException
	 */
	public WSCDDArtifactEdit(IProject aProject, boolean toAccessAsReadOnly) throws IllegalArgumentException {
		super(aProject, toAccessAsReadOnly);
	}

	/**
	 * <p>
	 * Creates an instance facade for the given {@see ArtifactEditModel}.
	 * </p>
	 * 
	 * @param anArtifactEditModel
	 */
	public WSCDDArtifactEdit(ArtifactEditModel model) {
		super(model);
	}

	/**
	 * <p>
	 * Creates an instance facade for the given {@see ArtifactEditModel}
	 * </p>
	 * <p>
	 * Note: This method is for internal use only. Clients should not call this
	 * method.
	 * </p>
	 * 
	 * @param aNature
	 *            A non-null {@see ModuleCoreNature}for an accessible project
	 * @param aModule
	 *            A non-null {@see WorkbenchComponent}pointing to a module from
	 *            the given {@see ModuleCoreNature}
	 */
	public WSCDDArtifactEdit(ModuleCoreNature aNature, IVirtualComponent aModule, boolean toAccessAsReadOnly) {
		super(aNature, aModule, toAccessAsReadOnly);
	}

	/**
	 * @return WsddResource from (@link getDeploymentDescriptorResource())
	 */

	public WebServicesResource getWscddXmiResource() {
		return (WebServicesResource) getDeploymentDescriptorResource();
	}

	/**
	 * <p>
	 * Retrieves J2EE version information from EJBResource.
	 * </p>
	 * 
	 * @return an integer representation of a J2EE Spec version
	 */

	@Override
	public int getJ2EEVersion() {
		return getWscddXmiResource().getJ2EEVersionID();
	}

	/**
	 * <p>
	 * Retrieves the underlying resource from the ArtifactEditModel using
	 * defined URI.
	 * </p>
	 * 
	 * @return Resource
	 */

	@Override
	public Resource getDeploymentDescriptorResource() {
		if (getArtifactEditModel()!=null)
			return getArtifactEditModel().getResource(getWebServicesClientXmlResourceURI());
		return null;
	}

	public URI getWebServicesClientXmlResourceURI() {
		URI resourceURI = J2EEConstants.WEB_SERVICES_CLIENT_WEB_INF_DD_URI_OBJ;
		if (isValidAppClientModule(ComponentCore.createComponent(getProject())))
			resourceURI = J2EEConstants.WEB_SERVICES_CLIENT_META_INF_DD_URI_OBJ;
		else if (isValidEJBModule(ComponentCore.createComponent(getProject())))
			resourceURI = J2EEConstants.WEB_SERVICES_CLIENT_META_INF_DD_URI_OBJ;
		return resourceURI;
	}

	/**
	 * @return WebServices from (@link getDeploymentDescriptorRoot())
	 */
	public WebServicesClient getWebServicesClient() {
		return (WebServicesClient) getDeploymentDescriptorRoot();
	}

	/**
	 * <p>
	 * Obtains the WebServices (@see WebServices) root object from the
	 * WsddResource. If the root object does not exist, then one is created
	 * (@link addEJBJarIfNecessary(getEJBJarXmiResource())). The root object
	 * contains all other resource defined objects.
	 * </p>
	 * 
	 * @return EObject
	 */
	@Override
	public EObject getDeploymentDescriptorRoot() {
		List contents = getDeploymentDescriptorResource().getContents();
		if (contents.size() > 0)
			return (EObject) contents.get(0);
		addWebServicesClientIfNecessary(getWscddXmiResource());
		return (EObject) contents.get(0);
	}

	/**
	 * <p>
	 * Creates a deployment descriptor root object (WebServices) and populates
	 * with data. Adds the root object to the deployment descriptor resource.
	 * </p>
	 * <p>
	 * 
	 * @param aModule
	 *            A non-null pointing to a {@see XMLResource} Note: This method
	 *            is typically used for JUNIT - move?
	 *            </p>
	 */
	protected void addWebServicesClientIfNecessary(WebServicesResource aResource) {
		if (aResource != null) {
			if (aResource.getContents() == null || aResource.getContents().isEmpty()) {
				WebServicesClient ws_client = Webservice_clientFactory.eINSTANCE.createWebServicesClient();
				aResource.getContents().add(ws_client);
			}
			aResource.getContents().get(0);
			getArtifactEditModel().getModuleURI();
			try {
				aResource.saveIfNecessary();
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
	}

	/**
	 * <p>
	 * Returns an instance facade to manage the underlying edit model for the
	 * given {@see WorkbenchComponent}. Instances of ArtifactEdit that are
	 * returned through this method must be {@see #dispose()}ed of when no
	 * longer in use.
	 * </p>
	 * <p>
	 * Use to acquire an ArtifactEdit facade for a specific
	 * {@see WorkbenchComponent}&nbsp;that will not be used for editing.
	 * Invocations of any save*() API on an instance returned from this method
	 * will throw exceptions.
	 * </p>
	 * <p>
	 * <b>The following method may return null. </b>
	 * </p>
	 * 
	 * @param aModule
	 *            A valid {@see WorkbenchComponent}&nbsp;with a handle that
	 *            resolves to an accessible project in the workspace
	 * @return An instance of ArtifactEdit that may only be used to read the
	 *         underlying content model
	 */
	public static WSCDDArtifactEdit getWSCDDArtifactEditForRead(IProject aProject) {
		WSCDDArtifactEdit artifactEdit = null;
		try {
			artifactEdit = new WSCDDArtifactEdit(aProject, true);
		} catch (IllegalArgumentException iae) {
			artifactEdit = null;
		}
		return artifactEdit;
	}

	/**
	 * <p>
	 * Returns an instance facade to manage the underlying edit model for the
	 * given {@see WorkbenchComponent}. Instances of ArtifactEdit that are
	 * returned through this method must be {@see #dispose()}ed of when no
	 * longer in use.
	 * </p>
	 * <p>
	 * Use to acquire an ArtifactEdit facade for a specific
	 * {@see WorkbenchComponent}&nbsp;that will be used for editing.
	 * </p>
	 * <p>
	 * <b>The following method may return null. </b>
	 * </p>
	 * 
	 * @param aModule
	 *            A valid {@see WorkbenchComponent}&nbsp;with a handle that
	 *            resolves to an accessible project in the workspace
	 * @return An instance of ArtifactEdit that may be used to modify and
	 *         persist changes to the underlying content model
	 */
	public static WSCDDArtifactEdit getWSCDDArtifactEditForWrite(IProject aProject) {
		WSCDDArtifactEdit artifactEdit = null;
		try {
			artifactEdit = new WSCDDArtifactEdit(aProject, false);
		} catch (IllegalArgumentException iae) {
			artifactEdit = null;
		}
		return artifactEdit;
	}

	/**
	 * <p>
	 * Returns an instance facade to manage the underlying edit model for the
	 * given {@see WorkbenchComponent}. Instances of WSDDArtifactEdit that are
	 * returned through this method must be {@see #dispose()}ed of when no
	 * longer in use.
	 * </p>
	 * <p>
	 * Use to acquire an WSDDArtifactEdit facade for a specific
	 * {@see WorkbenchComponent}&nbsp;that will not be used for editing.
	 * Invocations of any save*() API on an instance returned from this method
	 * will throw exceptions.
	 * </p>
	 * <p>
	 * <b>This method may return null. </b>
	 * </p>
	 * <p>
	 * Note: This method is for internal use only. Clients should not call this
	 * method.
	 * </p>
	 * 
	 * @param aModule
	 *            A valid {@see WorkbenchComponent}&nbsp;with a handle that
	 *            resolves to an accessible project in the workspace
	 * @return An instance of WSDDArtifactEdit that may only be used to read the
	 *         underlying content model
	 * @throws UnresolveableURIException
	 *             could not resolve uri.
	 */
	public static WSCDDArtifactEdit getWSCDDArtifactEditForRead(IVirtualComponent aModule) {

		IProject project = aModule.getProject();
		ModuleCoreNature nature = ModuleCoreNature.getModuleCoreNature(project);
		if (isValidWSCDDModule(aModule))
			return new WSCDDArtifactEdit(nature, aModule, true);
		return null;
	}

	/**
	 * <p>
	 * Returns an instance facade to manage the underlying edit model for the
	 * given {@see WorkbenchComponent}. Instances of EJBArtifactEdit that are
	 * returned through this method must be {@see #dispose()}ed of when no
	 * longer in use.
	 * </p>
	 * <p>
	 * Use to acquire an WSDDArtifactEdit facade for a specific
	 * {@see WorkbenchComponent}&nbsp;that will be used for editing.
	 * </p>
	 * <p>
	 * <b>This method may return null. </b>
	 * </p>
	 * <p>
	 * Note: This method is for internal use only. Clients should not call this
	 * method.
	 * </p>
	 * 
	 * @param aModule
	 *            A valid {@see WorkbenchComponent}&nbsp;with a handle that
	 *            resolves to an accessible project in the workspace
	 * @return An instance of WSDDArtifactEdit that may be used to modify and
	 *         persist changes to the underlying content model
	 */
	public static WSCDDArtifactEdit getWSCDDArtifactEditForWrite(IVirtualComponent aModule) {
		IProject project = aModule.getProject();
		ModuleCoreNature nature = ModuleCoreNature.getModuleCoreNature(project);
		if (isValidWSCDDModule(aModule))
			return new WSCDDArtifactEdit(nature, aModule, false);
		return null;
	}

	/**
	 * @param component
	 *            A {@see IVirtualComponent}
	 * @return True if the supplied module
	 *         {@see ArtifactEdit#isValidEditableModule(IVirtualComponent)}and
	 *         the moduleTypeId is a JST module
	 */
	public static boolean isValidEJBModule(IVirtualComponent aComponent) {
		return aComponent !=null && JavaEEProjectUtilities.isEJBProject(aComponent.getProject());
	}

	/**
	 * @param component
	 *            A {@see IVirtualComponent}
	 * @return True if the supplied module
	 *         {@see ArtifactEdit#isValidWSDDModule(IVirtualComponent)}and the
	 *         moduleTypeId is a JST module
	 */
	protected static boolean isValidWSCDDModule(IVirtualComponent aComponent) {
		return (isValidAppClientModule(aComponent) || isValidWebModule(aComponent) || isValidEJBModule(aComponent));
	}

	/**
	 * @param component
	 *            A {@see IVirtualComponent}
	 * @return True if the supplied module
	 *         {@see ArtifactEdit#isValidEditableModule(IVirtualComponent)}and
	 *         the moduleTypeId is a JST module
	 */
	public static boolean isValidWebModule(IVirtualComponent aComponent) {
		return aComponent !=null && JavaEEProjectUtilities.isDynamicWebProject(aComponent.getProject());
	}

	/**
	 * @param component
	 *            A {@see IVirtualComponent}
	 * @return True if the supplied module
	 *         {@see ArtifactEdit#isValidEditableModule(IVirtualComponent)}and
	 *         the moduleTypeId is a JST module
	 */
	public static boolean isValidAppClientModule(IVirtualComponent aComponent) {
		return aComponent !=null && JavaEEProjectUtilities.isApplicationClientProject(aComponent.getProject());
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jst.j2ee.internal.modulecore.util.EnterpriseArtifactEdit#createModelRoot()
	 */
	@Override
	public EObject createModelRoot() {
		return createModelRoot(getJ2EEVersion());
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jst.j2ee.internal.modulecore.util.EnterpriseArtifactEdit#createModelRoot(int)
	 */
	@Override
	public EObject createModelRoot(int version) {
		WebServicesResource res = getWscddXmiResource();
		res.setModuleVersionID(version);
		addWebServicesClientIfNecessary(res);
		return getWebServicesClient();
	}
	@Override
	public IModelProvider create(IProject project) {
		return getWSCDDArtifactEditForRead(project);
	}

	@Override
	public IModelProvider create(IVirtualComponent component) {
		return getWSCDDArtifactEditForRead(component);
	}
	@Override
	public void modify(Runnable runnable, IPath modelPath) {
		setWritableEdit(getWSCDDArtifactEditForWrite(getProject()));
		try{
			runnable.run();
			if( getWritableEdit() != null ){
				// Always save regardless of resource path passed - Artifactedits save resources as a unit
				getWritableEdit().saveIfNecessary( new NullProgressMonitor() );
			}
			
		} finally { //Properly dispose the write artifact edit
			getWritableEdit().dispose();
			setWritableEdit(null);
		}
	}
	@Override
	protected boolean validProjectVersion(IProject project2) {
		return true;
	}
}