package org.eclipse.jst.servlet.ui.internal.wizard;

import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.IPath;
import org.eclipse.jdt.core.IType;
import org.eclipse.jem.util.emf.workbench.ProjectUtilities;
import org.eclipse.jface.window.Window;
import org.eclipse.jst.j2ee.internal.common.operations.INewJavaClassDataModelProperties;
import org.eclipse.jst.j2ee.internal.project.J2EEProjectUtilities;
import org.eclipse.jst.j2ee.internal.web.operations.INewServletClassDataModelProperties;
import org.eclipse.jst.j2ee.internal.wizard.AnnotationsStandaloneGroup;
import org.eclipse.jst.j2ee.internal.wizard.NewJavaClassWizardPage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Cursor;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.eclipse.wst.common.componentcore.ComponentCore;
import org.eclipse.wst.common.componentcore.internal.operation.IArtifactEditOperationDataModelProperties;
import org.eclipse.wst.common.componentcore.resources.IVirtualComponent;
import org.eclipse.wst.common.frameworks.datamodel.IDataModel;

public class NewServletClassWizardPage extends NewJavaClassWizardPage {

	private AnnotationsStandaloneGroup annotationsGroup = null;
	private Button existingClassButton;
	private Label existingClassLabel;
	private Text existingClassText;
	private Button existingButton;
	private final static String[] JSPEXTENSIONS = { "jsp" }; //$NON-NLS-1$
	
	
	public NewServletClassWizardPage(IDataModel model, String pageName, String pageDesc, String pageTitle, String moduleType) {
		super(model, pageName, pageDesc, pageTitle, moduleType);
	}
	
	/**
	 * Create annotations group and set default enablement
	 */
	private void createAnnotationsGroup(Composite parent) {
		annotationsGroup = new AnnotationsStandaloneGroup(parent, model, J2EEProjectUtilities.EJB.equals(projectType),
				J2EEProjectUtilities.DYNAMIC_WEB.equals(projectType));
		if (!model.isPropertySet(IArtifactEditOperationDataModelProperties.PROJECT_NAME))
			return;
		IProject project = ProjectUtilities.getProject(model.getStringProperty(IArtifactEditOperationDataModelProperties.PROJECT_NAME));
		annotationsGroup.setEnablement(project);
		// annotationsGroup.setUseAnnotations(true);
	}
	
	protected Composite createTopLevelComposite(Composite parent) {
		Composite composite = super.createTopLevelComposite(parent);
		addSeperator(composite,3);
		createUseExistingGroup(composite);
		createAnnotationsGroup(composite);
		return composite;
	}

	private void createUseExistingGroup(Composite composite) {
		existingButton = new Button(composite, SWT.CHECK);
		existingButton.setText(IWebWizardConstants.USE_EXISTING_SERVLET_CLASS);
		GridData data = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
		data.horizontalSpan = 3;
		existingButton.setLayoutData(data);
		synchHelper.synchCheckbox(existingButton, INewServletClassDataModelProperties.USE_EXISTING_CLASS, null);
		existingButton.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				handleExistingButtonSelected();
			}
		});
		
		existingClassLabel = new Label(composite, SWT.LEFT);
		existingClassLabel.setText(IWebWizardConstants.CLASS_NAME_LABEL);
		existingClassLabel.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING));
		existingClassLabel.setEnabled(false);

		existingClassText = new Text(composite, SWT.SINGLE | SWT.BORDER | SWT.READ_ONLY);
		existingClassText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		existingClassText.setEnabled(false);
		synchHelper.synchText(existingClassText, INewJavaClassDataModelProperties.CLASS_NAME, null);

		existingClassButton = new Button(composite, SWT.PUSH);
		existingClassButton.setText(IWebWizardConstants.BROWSE_BUTTON_LABEL);
		existingClassButton.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));
		existingClassButton.setEnabled(false);
		existingClassButton.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				handleClassButtonSelected();
			}
		});
	}
	
	private void handleExistingButtonSelected() {
		boolean enable = existingButton.getSelection();
		if (!enable) {
			existingClassText.setText(""); //$NON-NLS-1$
		}
		existingClassLabel.setEnabled(enable);
		existingClassButton.setEnabled(enable);
		packageText.setEnabled(!enable);
		packageButton.setEnabled(!enable);
		packageLabel.setEnabled(!enable);
		classText.setEnabled(!enable);
		classText.setText(""); //$NON-NLS-1$
		classLabel.setEnabled(!enable);
		superText.setEnabled(!enable);
		superButton.setEnabled(!enable);
		superLabel.setEnabled(!enable);
	}

	private void handleClassButtonSelected() {
		getControl().setCursor(new Cursor(getShell().getDisplay(), SWT.CURSOR_WAIT));
		IProject project = (IProject) model.getProperty(INewJavaClassDataModelProperties.PROJECT);
		IVirtualComponent component = ComponentCore.createComponent(project);
		MultiSelectFilteredFileSelectionDialog ms = new MultiSelectFilteredFileSelectionDialog(
				getShell(),
				IWebWizardConstants.NEW_SERVLET_WIZARD_WINDOW_TITLE,
				IWebWizardConstants.CHOOSE_SERVLET_CLASS, 
				JSPEXTENSIONS, 
				false, 
				project);
		IContainer root = component.getRootFolder().getUnderlyingFolder();
		ms.setInput(root);
		ms.open();
		if (ms.getReturnCode() == Window.OK) {
			String qualifiedClassName = ""; //$NON-NLS-1$
			if (ms.getSelectedItem() == MultiSelectFilteredFileSelectionDialog.JSP) {
				Object obj = ms.getFirstResult();
				if (obj != null) {
					if (obj instanceof IFile) {
						IFile file = (IFile) obj;
						IPath pFull = file.getFullPath();
						IPath pBase = root.getFullPath();
						IPath path = pFull.removeFirstSegments(pBase.segmentCount());
						qualifiedClassName = path.makeAbsolute().toString();
						model.setProperty(INewServletClassDataModelProperties.IS_SERVLET_TYPE, new Boolean(false));
					}
				}
			} 
			else {
				IType type = (IType) ms.getFirstResult();
				if (type != null) {
					qualifiedClassName = type.getFullyQualifiedName();
					model.setProperty(INewServletClassDataModelProperties.IS_SERVLET_TYPE, new Boolean(true));
				}
			}
			existingClassText.setText(qualifiedClassName);
		}
		getControl().setCursor(null);
	}
}