/******************************************************************************
 * Copyright (c) 2009 Red Hat, IBM
 * 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:
 *    Rob Stryker - initial implementation and ongoing maintenance
 *    Chuck Bridgham - additional support
 ******************************************************************************/
package org.eclipse.jst.j2ee.internal.ui.preferences;

import java.util.ArrayList;

import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.core.runtime.Path;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jst.j2ee.application.internal.operations.AddComponentToEnterpriseApplicationDataModelProvider;
import org.eclipse.jst.j2ee.application.internal.operations.RemoveComponentFromEnterpriseApplicationDataModelProvider;
import org.eclipse.jst.j2ee.internal.J2EEConstants;
import org.eclipse.jst.j2ee.internal.common.classpath.J2EEComponentClasspathUpdater;
import org.eclipse.jst.j2ee.internal.componentcore.JavaEEModuleHandler;
import org.eclipse.jst.j2ee.internal.plugin.J2EEUIMessages;
import org.eclipse.jst.j2ee.internal.plugin.J2EEUIPlugin;
import org.eclipse.jst.j2ee.model.IEARModelProvider;
import org.eclipse.jst.j2ee.model.ModelProviderManager;
import org.eclipse.jst.j2ee.project.JavaEEProjectUtilities;
import org.eclipse.jst.javaee.application.Application;
import org.eclipse.jst.jee.project.facet.EarCreateDeploymentFilesDataModelProvider;
import org.eclipse.jst.jee.project.facet.ICreateDeploymentFilesDataModelProperties;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.eclipse.wst.common.componentcore.internal.IModuleHandler;
import org.eclipse.wst.common.componentcore.resources.IVirtualComponent;
import org.eclipse.wst.common.componentcore.resources.IVirtualFile;
import org.eclipse.wst.common.componentcore.ui.propertypage.AddModuleDependenciesPropertiesPage;
import org.eclipse.wst.common.componentcore.ui.propertypage.ModuleAssemblyRootPage;
import org.eclipse.wst.common.frameworks.datamodel.DataModelFactory;
import org.eclipse.wst.common.frameworks.datamodel.IDataModel;
import org.eclipse.wst.common.frameworks.datamodel.IDataModelOperation;
import org.eclipse.wst.common.frameworks.datamodel.IDataModelProvider;

public class EarModuleDependenciesPropertyPage extends
		AddModuleDependenciesPropertiesPage {
	private String libDir = null;
	private Text libDirText;
	public EarModuleDependenciesPropertyPage(IProject project,
			ModuleAssemblyRootPage page) {
		super(project, page);
	}
	
	@Override
	protected void createTableComposite(Composite parent) {
		Composite composite = new Composite(parent, SWT.NONE);
		GridData gData = new GridData(GridData.FILL_BOTH);
		composite.setLayoutData(gData);
		fillTableComposite(composite);
		if( JavaEEProjectUtilities.isJEEComponent(rootComponent))
			addLibDirComposite(composite);
	}

	private String loadLibDirString() {
		Application app = (Application)ModelProviderManager.getModelProvider(project).getModelObject();
		String val = app.getLibraryDirectory();
		if (val == null)
			val = J2EEConstants.EAR_DEFAULT_LIB_DIR;
		return val;
	}
	
	protected void addLibDirComposite(Composite parent) {
		libDir = loadLibDirString();
		Composite c = new Composite(parent, SWT.NONE);
		GridData mainData = new GridData(GridData.FILL_HORIZONTAL);
		c.setLayoutData(mainData);
		
		GridLayout gl = new GridLayout(2,false);
		c.setLayout(gl);
		Label l = new Label(c, SWT.NONE);
		l.setText(Messages.EarModuleDependenciesPropertyPage_LIBDIR);
		libDirText = new Text(c, SWT.BORDER);
		GridData gd = new GridData(GridData.FILL_HORIZONTAL);
		libDirText.setLayoutData(gd);
		libDirText.setText(libDir);
		libDirText.addModifyListener(new ModifyListener() {
			public void modifyText(ModifyEvent e) {
				libDirTextModified();
			} });
	}
	
	protected void libDirTextModified() {
		libDir = libDirText.getText();
	}

	protected IDataModelOperation generateEARDDOperation() {
		IDataModel model = DataModelFactory.createDataModel(new EarCreateDeploymentFilesDataModelProvider());
		model.setProperty(ICreateDeploymentFilesDataModelProperties.GENERATE_DD, rootComponent);
		model.setProperty(ICreateDeploymentFilesDataModelProperties.TARGET_PROJECT, project);
		return model.getDefaultOperation();
	}
	
	@Override
	public boolean postHandleChanges(IProgressMonitor monitor) {
		return true;
	}
	
	@Override
	protected void handleRemoved(ArrayList<IVirtualComponent> removed) {
		super.handleRemoved(removed);
		J2EEComponentClasspathUpdater.getInstance().queueUpdateEAR(rootComponent.getProject());
	}

	@Override
	protected IDataModelProvider getAddReferenceDataModelProvider(IVirtualComponent component) {
		return new AddComponentToEnterpriseApplicationDataModelProvider();
	}

	@Override
	protected String getModuleAssemblyRootPageDescription() {
		return Messages.EarModuleDependenciesPropertyPage_3;
	}

	@Override
	protected IDataModelProvider getRemoveReferenceDataModelProvider(IVirtualComponent component) {
		return new RemoveComponentFromEnterpriseApplicationDataModelProvider();
	}
	
	protected void createDD(IProgressMonitor monitor) {
		if( rootComponent != null ){
			IDataModelOperation op = generateEARDDOperation();
			try {
				op.execute(monitor, null);
			} catch (ExecutionException e) {
				J2EEUIPlugin.logError(e);
			}
		}
	}

	@Override
	public void handleEvent(Event event) {
		super.handleEvent(event);
	}

	@Override
	public boolean performOk() {
		boolean result = super.performOk();
		if( JavaEEProjectUtilities.isJEEComponent(rootComponent))
			updateLibDir();
		return result;
	}
	
	private void updateLibDir() {
		if (!libDir.equals(J2EEConstants.EAR_DEFAULT_LIB_DIR)) {
			IVirtualFile vFile = rootComponent.getRootFolder().getFile(new Path(J2EEConstants.APPLICATION_DD_URI));
			if (!vFile.exists()) {
				if (!MessageDialog.openQuestion(null, 
						J2EEUIMessages.getResourceString(J2EEUIMessages.NO_DD_MSG_TITLE), 
						J2EEUIMessages.getResourceString(J2EEUIMessages.GEN_DD_QUESTION))) 
					return;
				createDD(new NullProgressMonitor());
			}
		}
		
		final IEARModelProvider earModel = (IEARModelProvider)ModelProviderManager.getModelProvider(project);
		Application app = (Application)earModel.getModelObject();
		String oldLibDir = app.getLibraryDirectory();
		if ((oldLibDir != null && !oldLibDir.equals(libDir)) || oldLibDir == null) {
			earModel.modify(new Runnable() {
				public void run() {		
				Application app2 = (Application)earModel.getModelObject();
				app2.setLibraryDirectory(libDir);
			}}, null);
		}
	}

	@Override
	protected IModuleHandler getModuleHandler() {
		if(moduleHandler == null)
			moduleHandler = new JavaEEModuleHandler();
		return moduleHandler;
	}

}