/*

 * 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.button.ui;

import java.util.Set;

import org.eclipse.jface.dialogs.IDialogConstants;

import org.eclipse.jface.dialogs.MessageDialog;

import org.eclipse.jface.dialogs.TitleAreaDialog;

import org.eclipse.jface.layout.GridDataFactory;

import org.eclipse.jface.layout.GridLayoutFactory;

import org.eclipse.jface.viewers.ISelection;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.events.SelectionListener;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

import org.eclipse.swt.widgets.Group;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.Shell;

import org.eclipse.swt.widgets.Table;

import org.eclipse.ui.PlatformUI;

import com.nokia.carbide.cpp.pi.button.BupEventMapManager;

import com.nokia.carbide.cpp.pi.button.ComNokiaCarbidePiButtonHelpIDs;

import com.nokia.carbide.cpp.pi.button.IBupEventMap;

import com.nokia.carbide.cpp.pi.button.IBupEventMapProfile;

public class BupProfileEditDialog extends TitleAreaDialog {

	private Composite content = null;

	private Group localeMappingGroup = null;

	private Composite mappingComposite = null;

	private BupMapTableViewer mappingTableViewer = null;

	private Composite buttonComposite = null;

	private Button addButton = null;

	private Button removeButton = null;

	private Button editButton = null;

	private Button clearButton = null;

	class BupEditEntry {

		public String enumString = null;

		public String label = null;

		boolean changed = false;

	};

	private IBupEventMapProfile profileForThisEdit = null;

	private IBupEventMap mapForThisEdit = null;

	private ModifyCachedBupEventMap cachedMap = null;

	protected BupProfileEditDialog(Shell shell, IBupEventMapProfile myProfile) {

		super(shell);

		super.setShellStyle(super.getShellStyle() | SWT.RESIZE);

		profileForThisEdit = myProfile;

		mapForThisEdit = BupEventMapManager.getInstance().captureMap(profileForThisEdit);

		cachedMap = new ModifyCachedBupEventMap(mapForThisEdit);

	}

	private void cleanUp() {

		BupEventMapManager.getInstance().releaseMap(mapForThisEdit);

	}

	public Control createDialogArea(Composite parent) {

		getShell().setText(Messages.getString("BupProfileEditDialog.editingProfile") + profileForThisEdit.getProfileId()); //$NON-NLS-1$

		setTitle(Messages.getString("BupProfileEditDialog.profile") + profileForThisEdit.getProfileId()); //$NON-NLS-1$

		GridLayoutFactory layoutExpandBoth = GridLayoutFactory.fillDefaults();

		GridDataFactory gridDataExpandBoth = GridDataFactory.fillDefaults().grab(true, true);

		GridLayoutFactory gridLayoutButton = GridLayoutFactory.swtDefaults();

		GridDataFactory gridDataButton = GridDataFactory.swtDefaults();

		content = new Composite(parent, SWT.NONE);

		layoutExpandBoth.applyTo(content);

		gridDataExpandBoth.applyTo(content);

		PlatformUI.getWorkbench().getHelpSystem().setHelp(content, ComNokiaCarbidePiButtonHelpIDs.PI_PROFILE_EDIT_DIALOG);

		localeMappingGroup = new Group (content, SWT.NONE);

		layoutExpandBoth.applyTo(localeMappingGroup);

		gridDataExpandBoth.applyTo(localeMappingGroup);

		mappingComposite = new Composite (localeMappingGroup, SWT.NONE);

		layoutExpandBoth.copy().numColumns(2).applyTo(mappingComposite);

		gridDataExpandBoth.applyTo(mappingComposite);

		mappingTableViewer = new BupMapTableViewer(mappingComposite, true);

		Table mappingTable = mappingTableViewer.getTable();

		// enable the edit button only when a single file filter is selected

		mappingTable.addSelectionListener(new SelectionAdapter() {

			public void widgetSelected(SelectionEvent arg0) {

				handleViewerSelection();

			}

		});	

		int maxWidth;

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

		gridLayoutButton.applyTo(buttonComposite);

		gridDataButton.copy().align(SWT.CENTER, SWT.FILL).grab(false, true).applyTo(buttonComposite);

		addButton = new Button (buttonComposite, SWT.NONE);

		addButton.setText(Messages.getString("BupProfileEditDialog.add")); //$NON-NLS-1$

		addButton.addSelectionListener(new SelectionAdapter() {

			public void widgetSelected(SelectionEvent arg0) {

				handleAdd();

			}

		});	

		maxWidth = buttonComposite.computeSize(SWT.DEFAULT, SWT.DEFAULT).x;

		editButton = new Button (buttonComposite, SWT.NONE);

		editButton.setText(Messages.getString("BupProfileEditDialog.edit")); //$NON-NLS-1$

		editButton.addSelectionListener(new SelectionAdapter() {	

			public void widgetSelected(SelectionEvent arg0) {

				handleEdit();

			}	

		});

		maxWidth = Math.max(maxWidth, editButton.computeSize(SWT.DEFAULT, SWT.DEFAULT).x);

		removeButton = new Button (buttonComposite, SWT.NONE);

		removeButton.setText(Messages.getString("BupProfileEditDialog.remove")); //$NON-NLS-1$

		removeButton.addSelectionListener(new SelectionAdapter() {	

			public void widgetSelected(SelectionEvent arg0) {

				handleRemove();

			}	

		});

		maxWidth = Math.max(maxWidth, removeButton.computeSize(SWT.DEFAULT, SWT.DEFAULT).x);

		//dummy label as divider

		new Label(buttonComposite, SWT.NONE);

		new Label(buttonComposite, SWT.NONE);

		new Label(buttonComposite, SWT.NONE);

		new Label(buttonComposite, SWT.NONE);

		new Label(buttonComposite, SWT.NONE);

		clearButton = new Button(buttonComposite, SWT.NONE);

		clearButton.setText(Messages.getString("BupProfileEditDialog.clearProfile")); //$NON-NLS-1$

		clearButton.addSelectionListener(new SelectionListener() {

			public void widgetDefaultSelected(SelectionEvent arg0) {

			}

			public void widgetSelected(SelectionEvent arg0) {

				if (MessageDialog.openQuestion(getShell(), Messages.getString("BupProfileEditDialog.clearProfile"), Messages.getString("BupProfileEditDialog.clearAllConfirm"))) { //$NON-NLS-1$ //$NON-NLS-2$

					Set<Integer> keySet = cachedMap.getKeyCodeSet();

					Integer [] keyCodes = keySet.toArray(new Integer[keySet.size()]);

					for (Integer keyCode : keyCodes) {

						cachedMap.removeMapping(keyCode);

					}

					refreshTable();

				}

			}

		});

		maxWidth = Math.max(maxWidth, clearButton.computeSize(SWT.DEFAULT, SWT.DEFAULT).x);

		gridDataButton.hint(maxWidth, addButton.computeSize(SWT.DEFAULT, SWT.DEFAULT).y).applyTo(addButton);

		gridDataButton.hint(maxWidth, removeButton.computeSize(SWT.DEFAULT, SWT.DEFAULT).y).applyTo(removeButton);

		gridDataButton.hint(maxWidth, editButton.computeSize(SWT.DEFAULT, SWT.DEFAULT).y).applyTo(editButton);

		gridDataButton.hint(maxWidth, clearButton.computeSize(SWT.DEFAULT, SWT.DEFAULT).y).applyTo(clearButton);

		initialize();

		return content;

	}

	/**

	 * 

	 */

	protected void handleViewerSelection() {

		boolean enableEdit = (mappingTableViewer.getTable().getSelectionCount() == 1);

		editButton.setEnabled(enableEdit);

		boolean enableRemove = (mappingTableViewer.getTable().getSelectionCount() > 0);

		removeButton.setEnabled(enableRemove);

	}

	/**

	 * 

	 */

	protected void handleRemove() {

		ISelection selection = mappingTableViewer.getSelection();

		if (selection instanceof IStructuredSelection) {

			IStructuredSelection ss = (IStructuredSelection) selection;

			Object element = ss.getFirstElement();

			if (element instanceof BupMapTableViewer.BupMapEntry) {

				BupMapTableViewer.BupMapEntry entry = (BupMapTableViewer.BupMapEntry)element;

				cachedMap.removeMapping(entry.keyCode);

				refreshTable();

			}

		}

		removeButton.setEnabled(false);	// selection is gone, let next selection re-enable it

		refreshTable();

	}

	/**

	 * 

	 */

	protected void handleAdd() {

		BupMapAddDialog dialog = new BupMapAddDialog(getShell(), cachedMap, 0, "", ""); //$NON-NLS-1$ //$NON-NLS-2$

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

			cachedMap.addMapping(dialog.getKeyCode(), dialog.getEnumString(), dialog.getLabel());

		}

		refreshTable();

	}

	/**

	 * 

	 */

	protected void handleEdit() {

		ISelection selection = mappingTableViewer.getSelection();

		if (selection instanceof IStructuredSelection) {

			IStructuredSelection ss = (IStructuredSelection) selection;

			Object element = ss.getFirstElement();

			if (element instanceof BupMapTableViewer.BupMapEntry) {

				BupMapTableViewer.BupMapEntry entry = (BupMapTableViewer.BupMapEntry)element;

				BupMapEditDialog dialog = new BupMapEditDialog(getShell(), entry.keyCode, entry.enumString, entry.label);

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

					cachedMap.removeMapping(entry.keyCode);

					cachedMap.addMapping(entry.keyCode, dialog.getEnumString(), dialog.getLabel());

				}

			}

		}

		refreshTable();

	}

	private void initialize() {

		// initialize

		editButton.setEnabled(false);

		removeButton.setEnabled(false);

		refreshTable();

	}

	public void okPressed() {

		super.okPressed();

		if (cachedMap.haveUncommitedChanges()) {

			cachedMap.commitChanges();

			BupEventMapManager.getInstance().commitEditToWorkspace(mapForThisEdit);

		}

		cleanUp();

	}

	public void cancelPressed() {

		if (cachedMap.haveUncommitedChanges()) {

			MessageDialog dialog = new MessageDialog(getShell(), 

					Messages.getString("BupProfileEditDialog.uncommittedChanges"),  //$NON-NLS-1$

					null, 

					Messages.getString("BupProfileEditDialog.saveChanges") + profileForThisEdit.getProfileId() + "?",  //$NON-NLS-1$ //$NON-NLS-2$

					MessageDialog.QUESTION, 

					new String[] { IDialogConstants.YES_LABEL,

					IDialogConstants.NO_LABEL,

					IDialogConstants.CANCEL_LABEL }, 0); // default yes

			switch (dialog.open()) {

			case 0: // yes

				cachedMap.commitChanges();	// fall thru to no

			case 1: // no

				super.cancelPressed();

				cleanUp();

			case 2:	// cancel

			default:

				return;

			}

		}

		super.cancelPressed();

		cleanUp();

	}

	// Override OK to look like save

	protected Button createButton(Composite parent, int id, String label, boolean defaultButton) {

		Button myButton = super.createButton(parent, id, label, defaultButton);

		if (id == IDialogConstants.OK_ID) {

			myButton.setText(Messages.getString("BupProfileEditDialog.save")); //$NON-NLS-1$

		}

		return myButton;

	}

	private void refreshTable() {

		mappingTableViewer.loadMap(cachedMap);

	}

}