/*

* Copyright (c) 2009-2010 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.sdk.ui;

import java.io.File;

import java.text.MessageFormat;

import java.util.Iterator;

import java.util.List;

import org.eclipse.core.runtime.IPath;

import org.eclipse.core.runtime.Path;

import org.eclipse.core.runtime.jobs.IJobChangeEvent;

import org.eclipse.core.runtime.jobs.IJobChangeListener;

import org.eclipse.jface.dialogs.MessageDialog;

import org.eclipse.jface.preference.IPreferenceStore;

import org.eclipse.jface.preference.PreferencePage;

import org.eclipse.jface.viewers.ArrayContentProvider;

import org.eclipse.jface.viewers.CellEditor;

import org.eclipse.jface.viewers.CheckboxTableViewer;

import org.eclipse.jface.viewers.ColumnViewer;

import org.eclipse.jface.viewers.ColumnViewerEditor;

import org.eclipse.jface.viewers.ColumnViewerEditorActivationEvent;

import org.eclipse.jface.viewers.ColumnViewerEditorActivationStrategy;

import org.eclipse.jface.viewers.EditingSupport;

import org.eclipse.jface.viewers.ISelectionChangedListener;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.jface.viewers.ITableLabelProvider;

import org.eclipse.jface.viewers.LabelProvider;

import org.eclipse.jface.viewers.SelectionChangedEvent;

import org.eclipse.jface.viewers.StructuredSelection;

import org.eclipse.jface.viewers.TableViewerColumn;

import org.eclipse.jface.viewers.TableViewerEditor;

import org.eclipse.jface.viewers.TextCellEditor;

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.graphics.Color;

import org.eclipse.swt.graphics.Image;

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.Control;

import org.eclipse.swt.widgets.DirectoryDialog;

import org.eclipse.swt.widgets.Display;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.Shell;

import org.eclipse.swt.widgets.Table;

import org.eclipse.swt.widgets.Text;

import org.eclipse.ui.ISharedImages;

import org.eclipse.ui.IWorkbench;

import org.eclipse.ui.IWorkbenchPreferencePage;

import org.eclipse.ui.PlatformUI;

import com.nokia.carbide.cpp.internal.api.sdk.SymbianBuildContextDataCache;

import com.nokia.carbide.cpp.internal.sdk.core.model.SDKManager;

import com.nokia.carbide.cpp.internal.sdk.core.model.SymbianSDK;

import com.nokia.carbide.cpp.sdk.core.ISDKManager;

import com.nokia.carbide.cpp.sdk.core.ISymbianSDK;

import com.nokia.carbide.cpp.sdk.core.SDKCorePlugin;

import com.nokia.carbide.cpp.sdk.ui.SDKUIPlugin;

import com.nokia.carbide.cpp.sdk.ui.shared.AddSDKDialog;

import com.nokia.carbide.cpp.ui.TextAndDialogCellEditor;

import com.nokia.cpp.internal.api.utils.ui.BrowseDialogUtils;

public class SDKPreferencePage

	extends PreferencePage

	implements IWorkbenchPreferencePage {

	private class SDKLabelProvider extends LabelProvider implements ITableLabelProvider {

		public Image getColumnImage(Object element, int columnIndex) {

			return null;

		}

		public String getColumnText(Object element, int columnIndex) {

			ISymbianSDK sdk = (ISymbianSDK) element;

			switch (columnIndex) {

			case 1:

				return sdk.getUniqueId();

			case 2:

				return sdk.getEPOCROOT();

			default:

				return "";

			}

		}

	}

	private class IdEditingSupport extends EditingSupport {

		private TextCellEditor editor;

		public IdEditingSupport(ColumnViewer viewer) {

			super(viewer);

			editor = new TextCellEditor((Composite) viewer.getControl());

		}

		@Override

		protected boolean canEdit(Object element) {

			if (element instanceof ISymbianSDK) {

				return true;

			}

			return false;

		}

		@Override

		protected CellEditor getCellEditor(Object element) {

			return editor;

		}

		@Override

		protected Object getValue(Object element) {

			ISymbianSDK sdk = (ISymbianSDK) element;

			return sdk.getUniqueId();

		}

		@Override

		protected void setValue(Object element, Object value) {

			String sdkID = value.toString();

			// check for spaces in ID

			if (sdkID.contains(" ")){ //$NON-NLS-1$

				MessageDialog.openError(getShell(), Messages.getString("AddSDKDialog.Invalid_SDK_ID"), Messages.getString("AddSDKDialog.SDK_ID_No_Spaces")); //$NON-NLS-1$ //$NON-NLS-2$

				return;

			}

			ISymbianSDK sdk = (ISymbianSDK) element;

			((SymbianSDK)sdk).setUniqueId(sdkID);

			SDKCorePlugin.getSDKManager().updateSDK(sdk);

			getViewer().refresh();

		}

	}

	private class LocationEditingSupport extends EditingSupport {

		private LocationCellEditor editor;

		public LocationEditingSupport(ColumnViewer viewer) {

			super(viewer);

			editor = new LocationCellEditor((Composite) viewer.getControl());

		}

		@Override

		protected boolean canEdit(Object element) {

			if (element instanceof ISymbianSDK) {

				return true;

			}

			return false;

		}

		@Override

		protected CellEditor getCellEditor(Object element) {

			return editor;

		}

		@Override

		protected Object getValue(Object element) {

			ISymbianSDK sdk = (ISymbianSDK) element;

			return sdk.getEPOCROOT();

		}

		@Override

		protected void setValue(Object element, Object value) {

			ISymbianSDK sdk = (ISymbianSDK) element;

			SDKCorePlugin.getSDKManager().updateSDK(sdk);

			getViewer().refresh();

		}

	}

	private class LocationCellEditor extends TextAndDialogCellEditor {

		private Button button;

		private Text text;

		public LocationCellEditor(Composite parent) {

			super(parent);

		}

		@Override

		protected Control createContents(Composite parent) {

			text = (Text) super.createContents(parent);

			return text;

		}

		@Override

		protected Control createControl(Composite parent) {

			Control control = super.createControl(parent);

			button = getButton();

			button.setText(Messages.getString("SDKPreferencePage.Browse_Location_Label")); //$NON-NLS-1$

			return control;

		}

		@Override

		protected Object openDialogBox(Control cellEditorWindow) {

			DirectoryDialog dialog = new DirectoryDialog(getShell(), SWT.OPEN);

			BrowseDialogUtils.initializeFrom(dialog, text);

			return dialog.open();

		}		

	}

	private class SDKViewerStrategy extends ColumnViewerEditorActivationStrategy {

		public SDKViewerStrategy(ColumnViewer viewer) {

			super(viewer);

		}

		@Override

		protected boolean isEditorActivationEvent(ColumnViewerEditorActivationEvent event) {

			return (event.eventType ==  ColumnViewerEditorActivationEvent.MOUSE_DOUBLE_CLICK_SELECTION);

		}

	}

	private class ScanJobListener implements IJobChangeListener {

		public void done(IJobChangeEvent event) {

			Display.getDefault().asyncExec(new Runnable() {

				public void run() {

					finishRescanning();

				}

			});

		}

		public void aboutToRun(IJobChangeEvent event) {}

		public void awake(IJobChangeEvent event) {}

		public void running(IJobChangeEvent event) {}

		public void scheduled(IJobChangeEvent event) {}

		public void sleeping(IJobChangeEvent event) {}

	}

	private IPreferenceStore prefsStore;

	private ISDKManager sdkMgr;

	private List<ISymbianSDK> sdkList;

	private ScanJobListener scanJobListner;

	private boolean scanForNewPlugins;

	private CheckboxTableViewer sdkListTableViewer;

	private Button addButton;

	private Button deleteButton;

	private Button propertiesButton;

	private Button scanForNewPluginsButton;

	private Button rescanButton;

	private Label iconLabel;

	private Label statusLabel;

	private Color red;

	private Color black;

	private Color gray;

	/**

	 * Constructor.

	 */

	public SDKPreferencePage() {

		super();

//		scanJobListner = new ScanJobListener();

	}

	/*

	 * (non-Javadoc)

	 * @see org.eclipse.jface.preference.PreferencePage#createControl(org.eclipse.swt.widgets.Composite)

	 */

	public void createControl(Composite parent){

		prefsStore = SDKUIPlugin.getDefault().getPreferenceStore();

		sdkMgr = SDKCorePlugin.getSDKManager();

		if (sdkMgr == null){

			return; 

		}

		sdkList = sdkMgr.getSDKList();

		if (sdkMgr instanceof SDKManager) {

			SDKManager mgr = (SDKManager) sdkMgr;

//			mgr.addScanJobListner(scanJobListner);

		}

		super.createControl(parent);

		// Hide "Restore Defaults" button

		getDefaultsButton().setVisible(false);

		PlatformUI.getWorkbench().getHelpSystem().setHelp(super.getControl(), SDKUIHelpIds.SDK_PREFERENCES_PAGE);

	}

	/*

	 * (non-Javadoc)

	 * @see org.eclipse.jface.dialogs.DialogPage#dispose()

	 */

	public void dispose() {

		if (sdkMgr != null && sdkMgr instanceof SDKManager){

			SDKManager mgr = (SDKManager) sdkMgr;

			mgr.removeScanJobLisner(scanJobListner);

		}

	}

	/*

	 * (non-Javadoc)

	 * @see org.eclipse.ui.IWorkbenchPreferencePage#init(org.eclipse.ui.IWorkbench)

	 */

	public void init(IWorkbench arg0) {

	}

	/*

	 * (non-Javadoc)

	 * @see org.eclipse.jface.preference.PreferencePage#performOk()

	 */

	public boolean performOk() {

		// Save preference page specific values;

		prefsStore.setValue(SDKUIPreferenceConstants.SCAN_FOR_NEW_PLUGINS, scanForNewPluginsButton.getSelection());

		// Remember which SDK is enabled

		for (ISymbianSDK sdk : sdkMgr.getSDKList()){

			((SymbianSDK)sdk).setEnabled(false);

		}

		Object[] sdkObjects = sdkListTableViewer.getCheckedElements();

		for (Object currObj : sdkObjects){

			if (currObj instanceof ISymbianSDK){

				ISymbianSDK sdk = (ISymbianSDK)currObj;

				((SymbianSDK)sdk).setEnabled(true);

			}

		}

		// Update cached SDK info

		sdkMgr.updateCarbideSDKCache();

		return super.performOk();

	}

	/*

	 * (non-Javadoc)

	 * @see org.eclipse.jface.preference.PreferencePage#createContents(org.eclipse.swt.widgets.Composite)

	 */

	@Override

	protected Control createContents(Composite parent) {

		// Set up colors used in this preference page

		Shell shell = parent.getShell();

		red = shell.getDisplay().getSystemColor(SWT.COLOR_RED);

		black = shell.getDisplay().getSystemColor(SWT.COLOR_BLACK);

		gray = shell.getDisplay().getSystemColor(SWT.COLOR_WIDGET_BACKGROUND);

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

		GridLayout gridLayout = new GridLayout();

		gridLayout.numColumns = 2;

		content.setLayout(gridLayout);

		// SDK table

		sdkListTableViewer = CheckboxTableViewer.newCheckList(content, 

				SWT.BORDER | SWT.SINGLE | SWT.FULL_SELECTION);

		createSDKTable();

		// Buttons composite

		Composite composite1 = new Composite(content, SWT.NONE);

		gridLayout = new GridLayout();

		gridLayout.makeColumnsEqualWidth = true;

		composite1.setLayout(gridLayout);

		GridData gridData = new GridData(SWT.LEFT, SWT.TOP, true, false);

		composite1.setLayoutData(gridData);

		// Add button

		addButton = new Button(composite1, SWT.NONE);

		addButton.setLayoutData(gridData);

		addButton.setText(Messages.getString("SDKPreferencePage.Add_Button_Label")); //$NON-NLS-1$

		addButton.setToolTipText(Messages.getString("SDKPreferencePage.Add_Button_ToolTip")); //$NON-NLS-1$

		addButtonListener(addButton);

		// Delete button

		deleteButton = new Button(composite1, SWT.NONE);

		deleteButton.setLayoutData(gridData);

		deleteButton.setText(Messages.getString("SDKPreferencePage.Delete_Button_Label")); //$NON-NLS-1$

		deleteButton.setToolTipText(Messages.getString("SDKPreferencePage.Delete_Button_ToolTip")); //$NON-NLS-1$

		addButtonListener(deleteButton);

		// Properties button

		propertiesButton = new Button(composite1, SWT.NONE);

		propertiesButton.setLayoutData(gridData);

		propertiesButton.setText(Messages.getString("SDKPreferencePage.Properties_Button_Label")); //$NON-NLS-1$

		propertiesButton.setToolTipText(Messages.getString("SDKPreferencePage.Properties_Button_ToolTip")); //$NON-NLS-1$

		addButtonListener(propertiesButton);

		// Status and Rescan composite

		Composite composite2 = new Composite(content, SWT.NONE);

		gridData = new GridData(SWT.FILL, SWT.CENTER, true, false);

		gridData.widthHint = 350;

		gridData.heightHint = 50;

		composite2.setLayoutData(gridData);

		gridLayout = new GridLayout();

		gridLayout.numColumns = 2;

		composite2.setLayout(gridLayout);

		// IStatus icon label

		iconLabel = new Label(composite2, SWT.NONE);

		// IStatus text label

		statusLabel = new Label(composite2, SWT.WRAP);

		gridData = new GridData(SWT.LEFT, SWT.TOP, true, false);

		gridData.verticalSpan = 2;

		statusLabel.setLayoutData(gridData);

		new Label(content, SWT.WRAP); // filler

		// Scan SDK checkbox

		scanForNewPluginsButton = new Button(content, SWT.CHECK);

		scanForNewPluginsButton.setText(Messages.getString("SDKPreferencePage.ScanForNewPlugins_Button_Label")); //$NON-NLS-1$

		scanForNewPluginsButton.setSelection(prefsStore.getBoolean(SDKUIPreferenceConstants.SCAN_FOR_NEW_PLUGINS));

		addButtonListener(scanForNewPluginsButton);

		new Label(content, SWT.WRAP); // filler

		// Rescan button

		rescanButton = new Button(content, SWT.NONE);

		rescanButton.setToolTipText(Messages.getString("SDKPreferencePage.Rescan_Button_ToolTip")); //$NON-NLS-1$

		rescanButton.setText(Messages.getString("SDKPreferencePage.Rescan_Button_Label")); //$NON-NLS-1$

		addButtonListener(rescanButton);

		// Populate SDK table

		addSDKComponentTableItems();

		selectSDKEntry(0);

		return content;

	}

	private void addButtonListener(final Button aButton) {

		SelectionListener listener = new SelectionAdapter() {

			public void widgetSelected(SelectionEvent e)  {

				if (e.getSource().equals(addButton)) {

					handleAddButton();

				} else if (e.getSource().equals(deleteButton)) {

					handleDeleteButton();

				} else if (e.getSource().equals(propertiesButton)) {

					handlePropertiesButton();

				} else if (e.getSource().equals(scanForNewPluginsButton)) {

					handleScanForNewPluginsButton();

				} else if (e.getSource().equals(rescanButton)) {

					handleRescanButton();

				}

			}

		};

		aButton.addSelectionListener(listener);

	}

	private void addSDKComponentTableItems() {

		sdkListTableViewer.setLabelProvider(new SDKLabelProvider());

		sdkListTableViewer.setContentProvider(new ArrayContentProvider());

		sdkList = sdkMgr.getSDKList();

		sdkListTableViewer.setInput(sdkList.toArray());

		Table table = sdkListTableViewer.getTable();

		int count = table.getItemCount();

		if (count < 10) {	// min. number of rows

			count = 10;

		} else 

		if (count > 20) {	// max. number of rows

			count = 20;

		}

		table.setToolTipText(Messages.getString("SDKPreferencePage.List_of_Available_SDKs_ToolTip")); //$NON-NLS-1$

		GridData gridData = new GridData(SWT.FILL, SWT.CENTER, true, false);

		gridData.widthHint = 350;

		gridData.heightHint = table.getItemHeight() * (count + 2);

		table.setLayoutData(gridData);

		setCheckedElements();

		addSDKTableViewerListeners();

		if (sdkList == null || sdkList.size() == 0){

			statusError(Messages.getString("SDKPreferencePage.No_SDKs_Available_Message")); //$NON-NLS-1$

		}

	}

	private void addSDKTableViewerListeners(){

		sdkListTableViewer.addSelectionChangedListener(new ISelectionChangedListener() {

			public void selectionChanged(SelectionChangedEvent event) {

				if(event.getSelection() instanceof IStructuredSelection) {

					IStructuredSelection selection = (IStructuredSelection)event.getSelection();

					if (selection.size() == 1){

						ISymbianSDK sdk = (ISymbianSDK)selection.getFirstElement();

						deleteButton.setEnabled(true);

						propertiesButton.setEnabled(true);		

						updateSDKStatus(sdk);

					}

					else {

						deleteButton.setEnabled(false);

						propertiesButton.setEnabled(false);			        	   

					}	

				}

			}

		});

	}

	private void createSDKTable() {

		Table table = sdkListTableViewer.getTable();

		table.setHeaderVisible(true);

		table.setLinesVisible(false);