/*

* 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.layout.GridDataFactory;

import org.eclipse.jface.layout.GridLayoutFactory;

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.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

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.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.IConnectionsManager.IConnectionListener;

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

/**

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

 */

@SuppressWarnings("restriction")

public class ConnectToDeviceDialog extends AbstractLaunchSettingsDialog implements IConnectionListener {

	private IConnectionsManager manager;

	private IConnectionTypeProvider typeProvider;

	private ComboViewer viewer;

	private Button editButton;

	private Label descriptionLabel;

	protected ConnectToDeviceDialog(Shell shell, LaunchWizardData data) {

		super(shell, data);

		manager = RemoteConnectionsActivator.getConnectionsManager();

		typeProvider = RemoteConnectionsActivator.getConnectionTypeProvider();

	}

	@Override

	protected Control createDialogArea(Composite parent) {

		final Composite composite = initDialogArea(parent, 

				"Change connection",

				LaunchWizardHelpIds.WIZARD_DIALOG_CHANGE_CONNECTION);

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

		GridDataFactory.fillDefaults().applyTo(viewerGroup);

		GridLayoutFactory.swtDefaults().numColumns(3).applyTo(viewerGroup);

		Label label = new Label(viewerGroup, SWT.NONE);

		label.setText("Current connection");

		GridDataFactory.defaultsFor(label).applyTo(label);

		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 "No Current connection";

			}

		});

		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);

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

		editButton.setText("Edit...");

		GridDataFactory.defaultsFor(editButton).applyTo(editButton);

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

		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;

	}

	protected void validate() {

		IStatus status = ConnectToDeviceSection.revalidate(data);

		if (status.isOK()) {

			IConnection connection = data.getConnection();

			if (connection != null) {

				IConnectedService connectedService = null;

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

				if (services != null) {

					for (IConnectedService service : services) {

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

							connectedService = service;

						}

					}

				}

				if (connectedService == null) {

					status = error(MessageFormat.format(

							"The selected connection does not support {0}",

							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)) {

						status = warning("The selected connection may not be usable for debugging:\n {0}", 

								serviceStatus.getLongDescription());

					}

				}

			}

		}

		updateStatus(status);

	}

	/**

	 *	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("No connections are detected or defined.  " + standardPNPMessage);

		}

	}

	public void connectionSelected(IConnection connection) {

		updateConnection(connection);

		validate();

	}

	public void connectionAdded(IConnection connection) {

		refreshUI();

	}

	public void connectionRemoved(IConnection connection) {

		refreshUI();		

	}

	public void currentConnectionSet(IConnection connection) {

		refreshUI();		

	}

	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() {

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

			public void run() {

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

					setViewerInput(getConnectionFromSelection(viewer.getSelection()));

				}

			}

		});

	}

	@Override

	public boolean close() {

		manager.addConnectionListener(this);

		return super.close();

	}

}