/*

 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description: 

 *

 */

package com.nokia.carbide.cpp.internal.pi.save;

import java.util.ArrayList;

import org.eclipse.core.resources.IContainer;

import org.eclipse.core.resources.IFolder;

import org.eclipse.core.resources.IProject;

import org.eclipse.core.resources.IResource;

import org.eclipse.core.resources.IWorkspaceRoot;

import org.eclipse.core.resources.ResourcesPlugin;

import org.eclipse.core.runtime.IPath;

import org.eclipse.core.runtime.Path;

import org.eclipse.jface.dialogs.IDialogPage;

import org.eclipse.jface.viewers.DecoratingLabelProvider;

import org.eclipse.jface.viewers.ISelection;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.jface.viewers.ITreeContentProvider;

import org.eclipse.jface.viewers.TreeSelection;

import org.eclipse.jface.viewers.TreeViewer;

import org.eclipse.jface.viewers.Viewer;

import org.eclipse.jface.wizard.WizardDialog;

import org.eclipse.jface.wizard.WizardPage;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.ModifyEvent;

import org.eclipse.swt.events.ModifyListener;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.events.SelectionListener;

import org.eclipse.swt.layout.GridData;

import org.eclipse.swt.layout.GridLayout;

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.ui.IViewSite;

import org.eclipse.ui.IWorkbenchWizard;

import org.eclipse.ui.PlatformUI;

import org.eclipse.ui.model.WorkbenchContentProvider;

import org.eclipse.ui.model.WorkbenchLabelProvider;

import org.eclipse.ui.wizards.newresource.BasicNewProjectResourceWizard;

import com.nokia.carbide.cpp.pi.ComNokiaCarbidePiHelpIDs;

/**

 * The SaveTableWizardPage wizard page allows setting the containing workspace folder

 * for the saved table data as well as the file name. The page will only accept file

 * name without the extension OR with the extension .csv.

 */

public class SaveTableWizardPage extends WizardPage {

	// Provides all folders in the workspace

	private class ProjectContentProvider

	extends WorkbenchContentProvider

	implements ITreeContentProvider

	{

		// local version just to prevent getChildren/hadChild getting stuck

		// calling each other

		private Object[] localGetChildren(Object arg0) {

			ArrayList<Object> returnList = new ArrayList<Object>();

			Object[] children = super.getChildren(arg0);

			for (Object child: children) {

				if (child instanceof IViewSite || 

					child instanceof IWorkspaceRoot || 

					child instanceof IFolder)

				{

					returnList.add(child);

				} else if (child instanceof IProject) {

					if (((IProject)child).isOpen()) {

						returnList.add(child);

					}

				}

			}

			return returnList.toArray(new Object[returnList.size()]);

		}

		public Object[] getChildren(Object arg0) {

			return localGetChildren(arg0);

		}

		public Object getParent(Object arg0) {

			return super.getParent(arg0);

		}

		public boolean hasChildren(Object arg0) {

			if (localGetChildren(arg0).length > 0) {

				return true;

			}

			return false;

		}

		public Object[] getElements(Object arg0) {

			return super.getElements(arg0);

		}

		public void dispose() {

			super.dispose();

		}

		public void inputChanged(Viewer arg0, Object arg1, Object arg2) {

			super.inputChanged(arg0, arg1, arg2);

		}

	}

//	private Text containerText;

	private Text fileText;

	private ISelection selection;

	private TreeViewer outputChooserTreeViewer;

	/**

	 * Constructor for SampleNewWizardPage.

	 * 

	 * @param pageName

	 */

	public SaveTableWizardPage(ISelection selection) {

		super("wizardPage"); //$NON-NLS-1$

		setTitle(Messages.getString("SaveTableWizardPage.CVSFileForTableData")); //$NON-NLS-1$

		setDescription(Messages.getString("SaveTableWizardPage.SpecifyFileWithCSVExtension")); //$NON-NLS-1$

		this.selection = selection;

	}

	/**

	 * @see IDialogPage#createControl(Composite)

	 */

	public void createControl(Composite parent) {

		Composite container = new Composite(parent, SWT.NULL);

		GridLayout layout = new GridLayout();

		container.setLayout(layout);

		layout.numColumns = 1;

//		layout.verticalSpacing = 9;

		PlatformUI.getWorkbench().getHelpSystem().setHelp(container, ComNokiaCarbidePiHelpIDs.PI_SAVE_TABLE_WIZARD_PAGE);

		createProjectComposite(container);

		GridData gd;

		Label fileLabel = new Label(container, SWT.NONE);

		fileLabel.setText(Messages.getString("SaveTableWizardPage.OutputFileName")); //$NON-NLS-1$

		fileText = new Text(container, SWT.BORDER | SWT.SINGLE);

		gd = new GridData(GridData.FILL_HORIZONTAL);

		fileText.setLayoutData(gd);

		fileText.addModifyListener(new ModifyListener() {

			public void modifyText(ModifyEvent e) {

				dialogChanged();

			}

		});

		initialize();

		dialogChanged();

		setControl(container);

	}

	/**

	 * Tests if the current workbench selection is a suitable container to use.

	 */

	private void initialize() {

		if (selection != null && selection.isEmpty() == false

				&& selection instanceof IStructuredSelection) {

			IStructuredSelection ssel = (IStructuredSelection) selection;

			if (ssel.size() > 1)

				return;

			Object obj = ssel.getFirstElement();

			if (obj instanceof IResource) {

				IContainer container;

				if (obj instanceof IContainer)

					container = (IContainer) obj;

				else

					container = ((IResource) obj).getParent();

//				containerText.setText(container.getFullPath().toString());

			}

		}

		fileText.setText("new_file.csv"); //$NON-NLS-1$

	}

	/**

	 * Ensures that both text fields are set.

	 */

	private void dialogChanged() {

//		IResource container = ResourcesPlugin.getWorkspace().getRoot()

//				.findMember(new Path(getContainerName()));

		String fileName = getFileName();

		if (outputChooserTreeViewer.getTree().getSelection().length < 1) {

//		if (getContainerName().length() == 0) {

			updateStatus(ERROR, Messages.getString("SaveTableWizardPage.ProjectFolderRequired")); //$NON-NLS-1$

			return;

		}

//		if (container == null

//				|| (container.getType() & (IResource.PROJECT | IResource.FOLDER)) == 0) {

//			updateStatus("File container must exist");

//			return;

//		}

//		if (!container.isAccessible()) {

//			updateStatus("Project must be writable");

//			return;

//		}

		if (fileName.length() == 0) {

			updateStatus(ERROR, Messages.getString("SaveTableWizardPage.FileNameRequired")); //$NON-NLS-1$

			return;

		}

		if (fileName.replace('\\', '/').indexOf('/', 1) > 0) {

			updateStatus(ERROR, Messages.getString("SaveTableWizardPage.FileNameMustBeValid")); //$NON-NLS-1$

			return;

		}

		int dotLoc = fileName.lastIndexOf('.');

		if (dotLoc != -1) {

			String ext = fileName.substring(dotLoc + 1);

			if (ext.equalsIgnoreCase("csv") == false) { //$NON-NLS-1$

				updateStatus(ERROR, Messages.getString("SaveTableWizardPage.FileExtensionMustBeCSV")); //$NON-NLS-1$

				return;

			}

		}

		TreeSelection selection = (TreeSelection) outputChooserTreeViewer.getSelection();

		if (   (selection != null)

			&& (selection.getFirstElement() != null)

			&& (selection.getFirstElement() instanceof IContainer)) {

			IContainer container = (IContainer) selection.getFirstElement();

			String file = fileName;

			if (dotLoc == -1)

			{

				file += ".csv"; //$NON-NLS-1$

			}

			if (container.getFile(new Path(file)).exists()) {

				updateStatus(WARNING, Messages.getString("SaveTableWizardPage.WarningFileExists")); //$NON-NLS-1$

				return;

			}

		}

		updateStatus(WARNING, null);

	}

	private void updateStatus(int messageType, String message) {

		setMessage(message, messageType);

		setPageComplete(messageType != ERROR);

	}

	public IPath getContainerName() {

		TreeSelection selection = (TreeSelection) outputChooserTreeViewer.getSelection();

		if (   (selection != null)

			&& (selection.getFirstElement() != null)

			&& (selection.getFirstElement() instanceof IContainer)) {

			IContainer container = (IContainer) selection.getFirstElement();

			return container.getFullPath();

		}

		return null;

	}

	public String getFileName() {

		return fileText.getText();

	}

//	/**

//	 * Uses the standard container selection dialog to choose the new value for

//	 * the container field.

//	 */

//

//	private void handleBrowse() {

//		ContainerSelectionDialog dialog = new ContainerSelectionDialog(

//				getShell(), ResourcesPlugin.getWorkspace().getRoot(), false,

//				"Select new file container");

//		if (dialog.open() == ContainerSelectionDialog.OK) {

//			Object[] result = dialog.getResult();

//			if (result.length == 1) {

//				containerText.setText(((Path) result[0]).toString());

//			}

//		}

//	}

//	private Composite composite = null;

//	private Composite projectComposite = null;

//	private Composite buttonComposite = null;

//	private TreeViewer outputChooserTreeViewer = null;

//	private Button createButton = null;

//	private Label fileLabel = null;

//	private Text outputText = null;

//	

//	public boolean validatePage() {

//		// need to enable finish, setPageComplete eventually check global states

////		if (outputText.getText().length() < 1 || outputChooserTreeViewer.getTree().getSelection().length < 1) {

////			setErrorMessage(Messages.getString("NewPIWizardPageOutputTask.choose.output.project")); //$NON-NLS-1$

////			setPageComplete(false);

////			return true;

////		}

////		setErrorMessage(null);

////		setPageComplete(true);

//		return true;

//	}

	/**

	 * This method initializes projectComposite	

	 *

	 */

	private void createProjectComposite(Composite container) {

		GridLayout gridLayout2 = new GridLayout();

		gridLayout2.numColumns = 2;

		Composite projectComposite = new Composite(container, SWT.NONE);

		projectComposite.setLayout(gridLayout2);

		projectComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

		outputChooserTreeViewer = new TreeViewer(projectComposite, SWT.BORDER);

		outputChooserTreeViewer.getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

		outputChooserTreeViewer.setContentProvider(new ProjectContentProvider());

		outputChooserTreeViewer.setLabelProvider(new DecoratingLabelProvider(

								new WorkbenchLabelProvider(), 

								PlatformUI.getWorkbench().getDecoratorManager().getLabelDecorator()));

		outputChooserTreeViewer.setInput(ResourcesPlugin.getWorkspace().getRoot());

		outputChooserTreeViewer.getTree().addSelectionListener(new SelectionListener() {

			public void widgetDefaultSelected(SelectionEvent arg0) {

			}

			public void widgetSelected(SelectionEvent arg0) {

				dialogChanged();

			}

		});

		createButtonComposite(projectComposite);

	}

	private void createButtonComposite(Composite projectComposite) {

		GridLayout gridLayout = new GridLayout();

		gridLayout.numColumns = 1;

		Composite buttonComposite = new Composite(projectComposite, SWT.NONE);

		buttonComposite.setLayout(gridLayout);

		buttonComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, true));

		Button createButton = new Button(buttonComposite, SWT.PUSH);

		createButton.setText(Messages.getString("SaveTableWizardPage.CreateEmptyProject")); //$NON-NLS-1$

		createButton.addSelectionListener(new SelectionListener() {

			public void widgetDefaultSelected(SelectionEvent arg0) {

			}

			public void widgetSelected(SelectionEvent arg0) {

				// get a standard Eclipse Wizard for creating folder

				IWorkbenchWizard wizard = new BasicNewProjectResourceWizard();

				wizard.init(PlatformUI.getWorkbench(), new TreeSelection());

				WizardDialog dialog = new WizardDialog(getShell(), wizard);

				dialog.open();

				if (outputChooserTreeViewer.getTree().getItemCount() == 1) {

					dialogChanged();

				}

			}

		});

	}

//	

//	private String generateNpiFileName() {	

//		// prepare the container folder to look into

//		TreeSelection selection = (TreeSelection) outputChooserTreeViewer.getSelection();

//		if (selection == null)

//			return "";

//		if (selection.getFirstElement() == null)

//			return "";

//		if ((selection.getFirstElement() instanceof IContainer) == false)

//			return "";

//		IContainer container = (IContainer) selection.getFirstElement();

//

//		String sampleFilename = null;//new java.io.File(NewPIWizardSettings.getInstance().sampleFileName).getName();

//		String initialFilename;

//

//		initialFilename = sampleFilename;

//		

//		int dot = initialFilename.lastIndexOf("."); //$NON-NLS-1$

//		String noExtension;

//		String baseName;

//		String finalName;

//		if (dot > 1) {

//			noExtension = initialFilename.substring(0, initialFilename.lastIndexOf(".")); //$NON-NLS-1$

//		} else {

//			noExtension = initialFilename;

//		}

//

//		Long suffixNumber = new Long(0);

//		

//		// just suffix _<number> if the name was derived from input sample name

//		if (noExtension.lastIndexOf("_") > 1 &&		//$NON-NLS-1$

//			initialFilename.equalsIgnoreCase(sampleFilename) == false

//			//&&

////			isPositiveLong(noExtension.substring(noExtension.lastIndexOf("_") + 1))

//			) { //$NON-NLS-1$

//			baseName = noExtension.substring(0, noExtension.lastIndexOf("_"));	//$NON-NLS-1$

////			if (isPositiveLong(noExtension.substring(noExtension.lastIndexOf("_") + 1))) { //$NON-NLS-1$

////				suffixNumber = Long.parseLong(noExtension.substring(noExtension.lastIndexOf("_") + 1)); //$NON-NLS-1$

////			}

//		} else {

//			baseName = noExtension;

//		}

//		

//		// check existing npi and bump number

//		while (container.getFile(new Path(baseName + "_" + suffixNumber.toString() + DOT_CSV)).exists()) { //$NON-NLS-1$

//			suffixNumber++;

//		}

//		

//		finalName = baseName + "_" + suffixNumber.toString() + DOT_CSV; //$NON-NLS-1$

//

//		return finalName;

//	}

//

//	public void setupPageFromFromNewPIWizardSettings() {

//		outputText.setText(SaveTableWizardPage.DOT_CSV);

//		outputChooserTreeViewer.getTree().deselectAll();

//		IContainer outputContainer = null;

//		if (outputChooserTreeViewer.getSelection() == null ||

//			outputChooserTreeViewer.getSelection().isEmpty()) {

//			// stupid eclipse guideline for default container when we found out how to do it

//			outputContainer = findDefaultContainer();

//		}

//		if (outputContainer == null ) {

//			// select it if it's the only one output project

//			if (outputChooserTreeViewer.getTree().getItemCount() == 1) {

//				outputChooserTreeViewer.setSelection(new StructuredSelection(outputChooserTreeViewer.getTree().getItem(0)));

//			}

//		} else {

//			// highlight all items select by expanding to that level

//			// restoring from file system persistent data could use this

//			outputChooserTreeViewer.expandToLevel(outputContainer, 0);

//			outputChooserTreeViewer.setSelection(new StructuredSelection(outputContainer));

//		}

//	}

//

//	private IContainer findDefaultContainer() {

//		IContainer result = null;

//		ISelection selection = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getSelectionService().getSelection();

//		if (selection instanceof IStructuredSelection) {

//			IStructuredSelection structuredSelection = (IStructuredSelection) selection;

//			Object firstElement = structuredSelection.getFirstElement();

//			if (firstElement instanceof IFile) {

//				result = ((IFile)firstElement).getParent();

//			} else if (firstElement instanceof IContainer) {

//				result = (IContainer) firstElement;

//			}

//		}

//		if (result == null) {

//			try {

//				IResource[] resources = ResourcesPlugin.getWorkspace().getRoot().members();

//				for (IResource resource : resources) {

//					if (resource instanceof IContainer) {

//						result = (IContainer) resource;

//						break;

//					}

//				}

//			} catch (CoreException e) {

//				e.printStackTrace();

//			}

//		}

//		return result;

//	}

//

//	public void writePageDataToNewPIWizardSettings() {

//	}

//

//	public void setVisible(boolean visable) {

//		super.setVisible(visable);

//		if (visable) {

//			outputText.setText(SaveTableWizardPage.DOT_CSV);

//			validatePage();

//		} else {

//		}

//	}

}