/*

* Copyright (c) 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.cdt.internal.debug.launch.newwizard;

import java.text.MessageFormat;

import java.util.ArrayList;

import java.util.Collection;

import java.util.HashSet;

import java.util.List;

import java.util.Set;

import org.eclipse.core.runtime.IStatus;

import org.eclipse.jface.dialogs.Dialog;

import org.eclipse.jface.dialogs.IDialogConstants;

import org.eclipse.jface.layout.GridDataFactory;

import org.eclipse.jface.layout.GridLayoutFactory;

import org.eclipse.jface.resource.JFaceResources;

import org.eclipse.jface.viewers.ArrayContentProvider;

import org.eclipse.jface.viewers.ComboViewer;

import org.eclipse.jface.viewers.ISelection;

import org.eclipse.jface.viewers.ISelectionChangedListener;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.jface.viewers.LabelProvider;

import org.eclipse.jface.viewers.SelectionChangedEvent;

import org.eclipse.jface.viewers.StructuredSelection;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.ControlAdapter;

import org.eclipse.swt.events.ControlEvent;

import org.eclipse.swt.events.DisposeEvent;

import org.eclipse.swt.events.DisposeListener;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.graphics.FontMetrics;

import org.eclipse.swt.graphics.GC;

import org.eclipse.swt.graphics.Point;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.widgets.Combo;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

import org.eclipse.swt.widgets.Display;

import org.eclipse.swt.widgets.Group;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.Shell;

import com.nokia.carbide.remoteconnections.RemoteConnectionsActivator;

import com.nokia.carbide.remoteconnections.interfaces.IConnectedService;

import com.nokia.carbide.remoteconnections.interfaces.IConnection;

import com.nokia.carbide.remoteconnections.interfaces.IConnectionType;

import com.nokia.carbide.remoteconnections.interfaces.IConnectionTypeProvider;

import com.nokia.carbide.remoteconnections.interfaces.IConnectionsManager;

import com.nokia.carbide.remoteconnections.interfaces.IConnectedService.IStatusChangedListener;

import com.nokia.carbide.remoteconnections.interfaces.IConnectionsManager.IConnectionListener;

import com.nokia.carbide.remoteconnections.settings.ui.SettingsWizard;

/**

 *	This dialog allows in-depth configuration of the connection settings.

 */

public class ConnectToDeviceDialog extends AbstractLaunchSettingsDialog implements IConnectionListener, IStatusChangedListener {

	private IConnectionsManager manager;

	private IConnectionTypeProvider typeProvider;

	private FontMetrics fm;

	private ComboViewer viewer;

	private Button editButton;

	private Label descriptionLabel;

	private Button newButton;

	private IConnectedService currentServiceListener;

	protected ConnectToDeviceDialog(Shell shell, LaunchWizardData data) {

		super(shell, data);

		manager = RemoteConnectionsActivator.getConnectionsManager();

		typeProvider = RemoteConnectionsActivator.getConnectionTypeProvider();

	}

	@Override

	protected Control createDialogArea(Composite parent) {

		initializeDialogUnits(parent);

		final Composite composite = initDialogArea(parent, 

				Messages.getString("ConnectToDeviceDialog.Title"), //$NON-NLS-1$

				LaunchWizardHelpIds.WIZARD_DIALOG_CHANGE_CONNECTION);

		Group viewerGroup = new Group(composite, SWT.NONE);

		viewerGroup.setText(Messages.getString("ConnectToDeviceDialog.GroupLabel")); //$NON-NLS-1$

		GridDataFactory.fillDefaults().applyTo(viewerGroup);

		GridLayoutFactory.swtDefaults().applyTo(viewerGroup);

		viewer = new ComboViewer(viewerGroup, SWT.READ_ONLY);

		viewer.setLabelProvider(new LabelProvider() {

			@Override

			public String getText(Object element) {

				if (element instanceof IConnection)

					return ((IConnection) element).getDisplayName();

				return Messages.getString("ConnectToDeviceDialog.NoCurrentItem"); //$NON-NLS-1$

			}

		});

		viewer.setContentProvider(new ArrayContentProvider());

		Combo combo = viewer.getCombo();

		GridDataFactory.defaultsFor(combo).grab(true, false).applyTo(combo);

		viewer.getControl().setData(UID, "combo_viewer"); //$NON-NLS-1$

		viewer.addSelectionChangedListener(new ISelectionChangedListener() {

			public void selectionChanged(SelectionChangedEvent event) {

				if (getDialogArea() != null)

					connectionSelected(getConnectionFromSelection(event.getSelection()));

			}

		});

		manager.addConnectionListener(this);

		parent.addDisposeListener(new DisposeListener() {

			public void widgetDisposed(DisposeEvent e) {

				manager.removeConnectionListener(ConnectToDeviceDialog.this);

				if (currentServiceListener != null)

					currentServiceListener.removeStatusChangedListener(ConnectToDeviceDialog.this);

			}

		});

		final Composite buttonGroup = new Composite(viewerGroup, SWT.NONE);

		int w = Dialog.convertHorizontalDLUsToPixels(fm, IDialogConstants.HORIZONTAL_MARGIN);

		int h = Dialog.convertVerticalDLUsToPixels(fm, IDialogConstants.VERTICAL_MARGIN);

		int hs = Dialog.convertHorizontalDLUsToPixels(fm, IDialogConstants.HORIZONTAL_SPACING);

		int vs = Dialog.convertVerticalDLUsToPixels(fm, IDialogConstants.VERTICAL_SPACING);

		GridLayoutFactory.swtDefaults().numColumns(2).equalWidth(true).

			margins(w, h).spacing(hs, vs).applyTo(buttonGroup);

		GridDataFactory.swtDefaults().align(SWT.END, SWT.CENTER).applyTo(buttonGroup);

		buttonGroup.setFont(parent.getFont());

		newButton = new Button(buttonGroup, SWT.PUSH);

		newButton.setText(Messages.getString("ConnectToDeviceDialog.NewLabel")); //$NON-NLS-1$

		newButton.setFont(JFaceResources.getDialogFont());

		int widthHint = Dialog.convertHorizontalDLUsToPixels(fm, IDialogConstants.BUTTON_WIDTH);

		Point minSize = newButton.computeSize(SWT.DEFAULT, SWT.DEFAULT, true);

		widthHint = Math.max(widthHint, minSize.x);

		GridDataFactory.swtDefaults().align(SWT.FILL, SWT.TOP).hint(widthHint, SWT.DEFAULT).applyTo(newButton);

		newButton.setData(UID, "newButton"); //$NON-NLS-1$

		newButton.addSelectionListener(new SelectionAdapter() {

			@Override

			public void widgetSelected(SelectionEvent e) {

				SettingsWizard wizard = new SettingsWizard(null, data.getService());

				wizard.open(composite.getShell());

				IConnection connection = wizard.getConnectionToEdit();

				setViewerInput(connection);

			}

		});

		editButton = new Button(buttonGroup, SWT.PUSH);

		editButton.setText(Messages.getString("ConnectToDeviceDialog.EditLabel")); //$NON-NLS-1$

		editButton.setFont(JFaceResources.getDialogFont());

		widthHint = Dialog.convertHorizontalDLUsToPixels(fm, IDialogConstants.BUTTON_WIDTH);

		minSize = editButton.computeSize(SWT.DEFAULT, SWT.DEFAULT, true);

		widthHint = Math.max(widthHint, minSize.x);

		GridDataFactory.swtDefaults().align(SWT.FILL, SWT.CENTER).hint(widthHint, SWT.DEFAULT).applyTo(editButton);

		editButton.setData(UID, "editButton"); //$NON-NLS-1$

		editButton.addSelectionListener(new SelectionAdapter() {

			@Override

			public void widgetSelected(SelectionEvent e) {

				IConnection connection = getConnectionFromSelection(viewer.getSelection()); 

				if (connection != null) {

					SettingsWizard wizard = new SettingsWizard(connection, data.getService());

					wizard.open(composite.getShell());

				}

			}

		});

		descriptionLabel = new Label(composite, SWT.WRAP);

		GridDataFactory.defaultsFor(descriptionLabel).grab(false, true).applyTo(descriptionLabel);

		composite.addControlListener(new ControlAdapter() {

			@Override

			public void controlResized(ControlEvent e) {

				descriptionLabel.pack();

			}

		});

		setViewerInput(data.getConnection());

		return composite;

	}

	private void initializeDialogUnits(Composite parent) {

		GC gc = new GC(parent);

		gc.setFont(JFaceResources.getDialogFont());

		fm = gc.getFontMetrics();

		gc.dispose();

	}

	protected void validate() {

		IStatus status = ConnectToDeviceSection.revalidate(data);

		if (status.isOK()) {

			IConnection connection = data.getConnection();

			if (connection != null) {

				IConnectedService connectedService = findConnectedServiceFromConnection(connection);

				if (connectedService == null) {

					status = error(MessageFormat.format(

							Messages.getString("ConnectToDeviceDialog.ServiceNotSupportedError"), //$NON-NLS-1$

							data.getService().getDisplayName()));

				}

				else {

					com.nokia.carbide.remoteconnections.interfaces.IConnectedService.IStatus serviceStatus = 

						connectedService.getStatus();

					if (!serviceStatus.getEStatus().equals(

							com.nokia.carbide.remoteconnections.interfaces.IConnectedService.IStatus.EStatus.UP)) {

						String description  = serviceStatus.getLongDescription();

						status = warning(Messages.getString("ConnectToDeviceDialog.ServiceNotAvailWarning"),  //$NON-NLS-1$

								description == null ? "" : description); //$NON-NLS-1$

					}

				}

			}

		}

		updateStatus(status);

	}

	private IConnectedService findConnectedServiceFromConnection(IConnection connection) {

		Collection<IConnectedService> services = manager.getConnectedServices(connection);

		for (IConnectedService connectedService : services) {

			if (connectedService != null && connectedService.getService().getIdentifier().equals(data.getService().getIdentifier())) {

				return connectedService;

			}

		}

		return null;

	}

	/**

	 *	Update for a change in the connection.  We will attempt to connect to the

	 *  device (once) to detect what TRK it is running.

	 */

	private void updateConnection(IConnection connection) {

		String standardPNPMessage = ConnectToDeviceSection.getStandardPNPMessage();

		data.setConnection(connection);

		if (connection != null) {

			descriptionLabel.setText(standardPNPMessage);

		} else {

			descriptionLabel.setText(Messages.getString("ConnectToDeviceDialog.NoConnectionsText") + standardPNPMessage); //$NON-NLS-1$

		}

		if (currentServiceListener != null)

			currentServiceListener.removeStatusChangedListener(this);

		currentServiceListener = findConnectedServiceFromConnection(connection);

		if (currentServiceListener != null)

			currentServiceListener.addStatusChangedListener(this);

	}

	protected void connectionSelected(IConnection connection) {

		updateConnection(connection);

		validate();

	}

	public void connectionAdded(IConnection connection) {

		refreshUI(null);

	}

	public void connectionRemoved(IConnection connection) {

		refreshUI(null);		

	}

	public void currentConnectionSet(IConnection connection) {

//		refreshUI(connection);

	}

	public void statusChanged(com.nokia.carbide.remoteconnections.interfaces.IConnectedService.IStatus status) {

		validate();

	}

	private Set<IConnectionType> getCompatibleConnectionTypes() {

		HashSet<IConnectionType> types = new HashSet<IConnectionType>();

		Collection<String> compatibleTypeIds =

			typeProvider.getCompatibleConnectionTypeIds(data.getService());

		for (String typeId : compatibleTypeIds) {

			types.add(typeProvider.getConnectionType(typeId));

		}

		return types;

	}

	private List<IConnection> getCompatibleConnections() {

		Set<IConnectionType> types = getCompatibleConnectionTypes();

		List<IConnection> compatibleConnections = new ArrayList<IConnection>();

		for (IConnection connection : manager.getConnections()) {

			if (types.contains(connection.getConnectionType()))

				compatibleConnections.add(connection);

		}

		return compatibleConnections;

	}

	private void setViewerInput(IConnection connection) {

		List<IConnection> connections = getCompatibleConnections();

		viewer.setInput(connections);

		if (connections.isEmpty())

			viewer.getCombo().setEnabled(false);

		else {

			viewer.getCombo().setEnabled(true);

			if (connection == null) {

				viewer.getCombo().select(0);

				ISelection selection = viewer.getSelection();

				connection = getConnectionFromSelection(selection);

				viewer.setSelection(selection);

			}

			else

				viewer.setSelection(new StructuredSelection(connection));

		}

		editButton.setEnabled(!viewer.getSelection().isEmpty());

		// fire listener in case we selected anew or the current connection changed

		connectionSelected(connection);

	}

	private IConnection getConnectionFromSelection(ISelection selection) {

		return (IConnection) ((IStructuredSelection) selection).getFirstElement();

	}

	private void refreshUI(final IConnection connection) {

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

			public void run() {

				if (viewer != null && viewer.getContentProvider() != null) {

					IConnection connectionToSet = connection == null ? getConnectionFromSelection(viewer.getSelection()) : connection;

					setViewerInput(connectionToSet);

				}

			}

		});

	}

}