/*

* Copyright (c) 2008 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.remoteconnections.settings.ui;

import com.nokia.carbide.remoteconnections.Messages;

import com.nokia.carbide.remoteconnections.RemoteConnectionsActivator;

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

import com.nokia.cpp.internal.api.utils.core.Check;

import org.eclipse.jface.viewers.*;

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.layout.GridData;

import org.eclipse.swt.layout.GridLayout;

import org.eclipse.swt.widgets.*;

import java.text.MessageFormat;

import java.util.*;

import java.util.List;

public class ConnectionTypePage extends WizardPage {

	private static final String INITIAL_NAME_FMT = "connection {0}"; //$NON-NLS-1$

	private static final String UID = ".uid"; //$NON-NLS-1$

	private final SettingsWizard settingsWizard;

	private ListViewer viewer;

	private Text nameText;

	private Label connectionTypeDescLabel;

	private Label servicesLabel;

	private boolean initialized;

	protected ConnectionTypePage(SettingsWizard settingsWizard) {

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

		this.settingsWizard = settingsWizard;

		setTitle(Messages.getString("ConnectionTypePage.Title")); //$NON-NLS-1$

		setDescription(Messages.getString("ConnectionTypePage.Description")); //$NON-NLS-1$

	}

	public void createControl(Composite parent) {

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

		container.setLayout(new GridLayout(2, false));

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

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

		nameLabel.setText(Messages.getString("ConnectionTypePage.NameLabel")); //$NON-NLS-1$

		nameText = new Text(container, SWT.BORDER);

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

		nameText.setLayoutData(gd);

		nameText.setToolTipText(Messages.getString("ConnectionTypePage.NameTextToolTip")); //$NON-NLS-1$

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

		nameText.setText(getInitialNameText());

		nameText.selectAll();

		nameText.addModifyListener(new ModifyListener() {

			public void modifyText(ModifyEvent e) {

				setPageComplete(validatePage());

			}

		});

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

		label.setLayoutData(new GridData(SWT.LEFT, SWT.TOP, false, false));

		label.setText(Messages.getString("ConnectionTypePage.ViewerLabel")); //$NON-NLS-1$

		viewer = new ListViewer(container, SWT.BORDER | SWT.READ_ONLY | SWT.V_SCROLL);

		viewer.setLabelProvider(new LabelProvider() {

			@Override

			public String getText(Object element) {

				Check.checkState(element instanceof IConnectionType);

				IConnectionType connectionType = (IConnectionType) element;

				return connectionType.getDisplayName();

			}

		});

		viewer.setContentProvider(new ArrayContentProvider());

		viewer.setInput(getConnectionTypes());

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

		viewer.getControl().setLayoutData(gd);

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

		viewer.addSelectionChangedListener(new ISelectionChangedListener() {

			private IConnectionType previousSelection;

			public void selectionChanged(SelectionChangedEvent event) {

				Object currentSelection = ((IStructuredSelection) event.getSelection()).getFirstElement();

				if (!currentSelection.equals(previousSelection)) {

					connectionTypeDescLabel.setText(getConnectionTypeDescription());

					servicesLabel.setText(getServicesString());

					settingsWizard.connectionTypeChanged();

					previousSelection = (IConnectionType) currentSelection;

				}

			}

		});

		viewer.addDoubleClickListener(new IDoubleClickListener() {

			public void doubleClick(DoubleClickEvent event) {

				getWizard().getContainer().showPage(getNextPage());

			}

		});

		viewer.setSorter(new ViewerSorter() {

			@Override

			public int compare(Viewer viewer, Object e1, Object e2) {

				IConnectionType t1 = (IConnectionType) e1;

				IConnectionType t2 = (IConnectionType) e2;

				return t1.getDisplayName().compareToIgnoreCase(t2.getDisplayName());

			}

		});

		viewer.getList().select(getCurrentTypeIndex());

		connectionTypeDescLabel = new Label(container, SWT.WRAP);

		connectionTypeDescLabel.setText(getConnectionTypeDescription());

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

		gd.horizontalSpan = 2;

		connectionTypeDescLabel.setLayoutData(gd);

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

		servicesLabel = new Label(container, SWT.WRAP);

		servicesLabel.setText(getServicesString());

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

		gd.horizontalSpan = 2;

		servicesLabel.setLayoutData(gd);

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

		setControl(container);

		RemoteConnectionsActivator.setHelp(container, ".connection_type_page"); //$NON-NLS-1$

	}

	private String getServicesString() {

		StringBuilder servicesString = new StringBuilder();

		Collection<IService> services = 

			RemoteConnectionsActivator.getConnectionTypeProvider().getCompatibleServices(getConnectionType());

		if (services == null || services.isEmpty())

			return ""; //$NON-NLS-1$

		for (Iterator<IService> iterator = services.iterator(); iterator.hasNext();) {

			servicesString.append(iterator.next().getDisplayName());

			if (iterator.hasNext())

				servicesString.append(", "); //$NON-NLS-1$

		}

		return MessageFormat.format(Messages.getString("ConnectionTypePage.SupportedServicesLabel"), new Object[] { servicesString.toString() }); //$NON-NLS-1$

	}

	private String getConnectionTypeDescription() {

		return getConnectionType().getDescription();

	}

	private int getCurrentTypeIndex() {

		IConnection connectionToEdit = settingsWizard.getConnectionToEdit();

		if (connectionToEdit != null) {

			Object input = viewer.getInput();

			if (input != null) {

				Collection<IConnectionType> connectionTypes = (Collection<IConnectionType>) input;

				for (int i = 0; i < connectionTypes.size(); i++) {

					IConnectionType connectionType = (IConnectionType) viewer.getElementAt(i);

					if (connectionToEdit.getConnectionType().equals(connectionType))

						return i;

				}

			}

		}

		return 0;

	}

	private Collection<IConnectionType> getConnectionTypes() {

		Collection<IConnectionType> connectionTypes = 

			RemoteConnectionsActivator.getConnectionTypeProvider().getConnectionTypes();

		IService serviceToRestrict = settingsWizard.getServiceToRestrict();

		if (serviceToRestrict != null) {

			List<IConnectionType> restrictedConnectionTypes = new ArrayList<IConnectionType>();

			Collection<String> compatibleConnectionTypeIds = 

				RemoteConnectionsActivator.getConnectionTypeProvider().getCompatibleConnectionTypeIds(serviceToRestrict);

			for (String connectionTypeId : compatibleConnectionTypeIds) {

				IConnectionType connectionType = 

					RemoteConnectionsActivator.getConnectionTypeProvider().getConnectionType(connectionTypeId);

				if (connectionTypes.contains(connectionType))

					restrictedConnectionTypes.add(connectionType);

			}

			return restrictedConnectionTypes;

		}

		return connectionTypes;

	}

	private boolean validatePage() {

		setErrorMessage(null);

		String name = getName();

		boolean isValid = isNameUnique(name);

		if (!isValid) {

			setErrorMessage(MessageFormat.format(Messages.getString("ConnectionTypePage.ConnectionNameInUseError"), new Object[] { name } )); //$NON-NLS-1$

		}

		return isValid;

	}

	private boolean isNameUnique(String name) {

		boolean inUse = RemoteConnectionsActivator.getConnectionsManager().connectionNameInUse(name);

		IConnection connectionToEdit = settingsWizard.getConnectionToEdit();

		if (connectionToEdit != null && inUse)

			inUse = !name.equals(connectionToEdit.getDisplayName());

		return !inUse;

	}

	private String getInitialNameText() {

		IConnection connectionToEdit = settingsWizard.getConnectionToEdit();

		if (connectionToEdit != null)

			return connectionToEdit.getDisplayName();

		long i = 1;

		while (true) {

			String name = MessageFormat.format(INITIAL_NAME_FMT, new Object[] { Long.toString(i++) });

			if (isNameUnique(name))

				return name;

		}

	}

	public String getName() {

		return nameText.getText().trim();

	}

	public IConnectionType getConnectionType() {

		return (IConnectionType) ((IStructuredSelection) viewer.getSelection()).getFirstElement();

	}

	public void setVisible(boolean visible) {

		super.setVisible(visible);

		if (!initialized && visible) {

			initialized = true;

			viewer.setSelection(viewer.getSelection());

			settingsWizard.connectionTypeChanged();

		}

	}

}