/*******************************************************************************
 * Copyright (c) 2003, 2005 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.deployables;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.jem.util.logger.proxy.Logger;
import org.eclipse.jst.j2ee.application.Application;
import org.eclipse.jst.j2ee.application.Module;
import org.eclipse.jst.j2ee.client.ApplicationClient;
import org.eclipse.jst.j2ee.componentcore.util.EARArtifactEdit;
import org.eclipse.jst.j2ee.ejb.EJBJar;
import org.eclipse.jst.j2ee.internal.J2EEVersionConstants;
import org.eclipse.jst.j2ee.internal.project.J2EEProjectUtilities;
import org.eclipse.jst.j2ee.jca.Connector;
import org.eclipse.jst.j2ee.webapplication.WebApp;
import org.eclipse.wst.common.componentcore.ArtifactEdit;
import org.eclipse.wst.common.componentcore.ComponentCore;
import org.eclipse.wst.common.componentcore.ModuleCoreNature;
import org.eclipse.wst.common.componentcore.internal.StructureEdit;
import org.eclipse.wst.common.componentcore.internal.util.ComponentUtilities;
import org.eclipse.wst.common.componentcore.internal.util.IModuleConstants;
import org.eclipse.wst.common.componentcore.resources.IVirtualComponent;
import org.eclipse.wst.common.componentcore.resources.IVirtualReference;
import org.eclipse.wst.server.core.IModule;
import org.eclipse.wst.server.core.model.ModuleDelegate;
import org.eclipse.wst.server.core.util.ProjectModuleFactoryDelegate;

/**
 * J2EE module factory.
 */
public class J2EEDeployableFactory extends ProjectModuleFactoryDelegate {
	protected Map moduleDelegates = new HashMap(5);
	
	public static final String ID = "org.eclipse.jst.j2ee.server"; //$NON-NLS-1$

	public J2EEDeployableFactory() {
		super();
	}

	protected IModule[] createModules(IProject project) {
		try {
			ModuleCoreNature nature = (ModuleCoreNature) project.getNature(IModuleConstants.MODULE_NATURE_ID);
			if (nature != null)
				return createModules(nature);
		} catch (CoreException e) {
			Logger.getLogger().write(e);
		}
		return null;
	}

	protected IModule[] createModules(ModuleCoreNature nature) {
		IProject project = nature.getProject();
		try {
			IVirtualComponent comp = ComponentCore.createComponent(project);
			return createModuleDelegates(comp);
		} catch (Exception e) {
			Logger.getLogger().write(e);
		}
		return null;
	}

	public ModuleDelegate getModuleDelegate(IModule module) {
		return (ModuleDelegate) moduleDelegates.get(module);
	}

	protected IModule[] createModuleDelegates(IVirtualComponent component) {
		List projectModules = new ArrayList();
		try {
			IModule module = null;
			String type = J2EEProjectUtilities.getJ2EEProjectType(component.getProject());
			if (type != null && !type.equals("")) {
				String version = J2EEProjectUtilities.getJ2EEProjectVersion(component.getProject());
				module = createModule(component.getDeployedName(), component.getDeployedName(), type, version, component.getProject());
				J2EEFlexProjDeployable moduleDelegate = new J2EEFlexProjDeployable(component.getProject(), component);
				moduleDelegates.put(module, moduleDelegate);
				projectModules.add(module);
			}
			// Check to add any binary modules
			if (J2EEProjectUtilities.ENTERPRISE_APPLICATION.equals(type))
				projectModules.addAll(Arrays.asList(createBinaryModules(component)));
		} catch (Exception e) {
			Logger.getLogger().write(e);
		}
		return (IModule[]) projectModules.toArray(new IModule[projectModules.size()]);
	}
	
	protected IModule[] createBinaryModules(IVirtualComponent component) {
		List projectModules = new ArrayList();
		EARArtifactEdit earEdit = null;
		try {
			Application app = null;
			IVirtualReference[] references = component.getReferences();
			for (int i=0; i<references.length; i++) {
				IVirtualComponent moduleComponent = references[i].getReferencedComponent();
				// Is referenced component a J2EE binary module archive or binary utility project?
				if (moduleComponent.isBinary()) {
					// create an ear edit, app only if the module is binary prevents exceptions when there
					// is no deployment descriptor in many cases see bug 174711
					if(earEdit == null){
						earEdit = EARArtifactEdit.getEARArtifactEditForRead(component.getProject());
						app = earEdit.getApplication();
					}
					// Check if module URI exists on EAR DD for binary j2ee archive
					Module j2eeModule = app.getFirstModule(references[i].getArchiveName());
					// If it is not a j2ee module and the component project is the ear, it is just an archive
					// and we can ignore as it will be processed by the EAR deployable.members() method
					if (j2eeModule == null && (moduleComponent.getProject() == component.getProject()))
						continue;
					
					String moduleVersion = null;
					String moduleType = null;
					// Handle the binary J2EE module case
					if(j2eeModule != null){
						ArtifactEdit moduleEdit = null;
						try {
							if (j2eeModule.isEjbModule()) {
								moduleEdit = ComponentUtilities.getArtifactEditForRead(moduleComponent, J2EEProjectUtilities.EJB);
								EJBJar ejbJar = (EJBJar) moduleEdit.getContentModelRoot();
								moduleType = J2EEProjectUtilities.EJB;
								moduleVersion = ejbJar.getVersion();
							}
							else if (j2eeModule.isWebModule()) {
								moduleEdit = ComponentUtilities.getArtifactEditForRead(moduleComponent, J2EEProjectUtilities.DYNAMIC_WEB);
								WebApp webApp = (WebApp) moduleEdit.getContentModelRoot();
								moduleType = J2EEProjectUtilities.DYNAMIC_WEB;
								moduleVersion = webApp.getVersion();
							}
							else if (j2eeModule.isConnectorModule()) {
								moduleEdit = ComponentUtilities.getArtifactEditForRead(moduleComponent, J2EEProjectUtilities.JCA);
								Connector connector = (Connector) moduleEdit.getContentModelRoot();
								moduleType = J2EEProjectUtilities.JCA;
								moduleVersion = connector.getVersion();
							}
							else if (j2eeModule.isJavaModule()) {
								moduleEdit = ComponentUtilities.getArtifactEditForRead(moduleComponent, J2EEProjectUtilities.APPLICATION_CLIENT);
								ApplicationClient appClient = (ApplicationClient) moduleEdit.getContentModelRoot();
								moduleType = J2EEProjectUtilities.APPLICATION_CLIENT;
								moduleVersion = appClient.getVersion();
							}
						} finally {
							if (moduleEdit!=null)
								moduleEdit.dispose();
						}
					} else { // Handle the binary utility component outside the EAR case.
						moduleVersion = J2EEProjectUtilities.UTILITY;
						moduleType = J2EEVersionConstants.VERSION_1_0_TEXT;
					}
					
					IModule nestedModule = createModule(moduleComponent.getDeployedName(), moduleComponent.getDeployedName(), moduleType, moduleVersion, moduleComponent.getProject());
					if (nestedModule!=null) {
						J2EEFlexProjDeployable moduleDelegate = new J2EEFlexProjDeployable(moduleComponent.getProject(), moduleComponent);
						moduleDelegates.put(nestedModule, moduleDelegate);
						projectModules.add(nestedModule);
						moduleDelegate.getURI(nestedModule);
					}
				}
			}
		} finally {
			if (earEdit!=null)
				earEdit.dispose();
		}
		return (IModule[]) projectModules.toArray(new IModule[projectModules.size()]);
	}

	/**
	 * Returns the list of resources that the module should listen to
	 * for state changes. The paths should be project relative paths.
	 * Subclasses can override this method to provide the paths.
	 *
	 * @return a possibly empty array of paths
	 */
	protected IPath[] getListenerPaths() {
		return new IPath[] {
			new Path(".project"), // nature
			new Path(StructureEdit.MODULE_META_FILE_NAME), // component
			new Path(".settings/org.eclipse.wst.common.project.facet.core.xml") // facets
		};
	}

	protected void clearCache() {
		moduleDelegates = new HashMap(5);
	}
}