/*

* 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.wizard;

import com.nokia.carbide.remoteconnections.Messages;

import com.nokia.carbide.remoteconnections.RemoteConnectionsActivator;

import com.nokia.carbide.remoteconnections.internal.registry.Reader;

import org.eclipse.core.runtime.IPath;

import org.eclipse.core.runtime.Path;

import org.eclipse.jface.viewers.CheckStateChangedEvent;

import org.eclipse.jface.viewers.ICheckStateListener;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.widgets.*;

import java.io.*;

/**

 * Page in import wizard

 */

public class ImportPage extends AbstractImportExportPage {

	// the following two arrays need to correspond

	static final String[] FILTER_EXTS  = { 

		"*.xml", //$NON-NLS-1$

		"*.*" //$NON-NLS-1$

	};

	static final String[] FILTER_EXT_NAMES  = { 

		Messages.getString("ImportPage.XMLFilesLabel"), //$NON-NLS-1$

		Messages.getString("ImportPage.AllFilesLabel") //$NON-NLS-1$

	};

	protected ImportPage() {

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

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

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

	}

	public void createControl(Composite parent) {

		super.createControl(parent);

		Composite composite = (Composite) getControl();

        createBrowseGroup(composite, Messages.getString("ImportPage.BrowseGroupLabel")); //$NON-NLS-1$

	    browseButton.addSelectionListener(new SelectionAdapter() {

			@Override

			public void widgetSelected(SelectionEvent e) {

				FileDialog fileDialog = new FileDialog(getShell(), SWT.OPEN);

				fileDialog.setText(Messages.getString("ImportPage.FileDialogTitle")); //$NON-NLS-1$

				fileDialog.setFilterExtensions(FILTER_EXTS);

				fileDialog.setFilterNames(FILTER_EXT_NAMES);

				String pathstr = fileDialog.open();

				if (pathstr != null) {

					pathText.setText(pathstr);

				}

			}

	    });

        createViewerGroup(composite, Messages.getString("ImportPage.ViewerGroupLabel")); //$NON-NLS-1$

		viewer.addCheckStateListener(new ICheckStateListener() {

			public void checkStateChanged(CheckStateChangedEvent event) {

				setPageComplete(validatePage(false));

			}

		});

        setPageComplete(validatePage(true));

		RemoteConnectionsActivator.setHelp(composite, ".import_wizard"); //$NON-NLS-1$

	}

	protected boolean validatePage(boolean validateFile) {

		setErrorMessage(null);

		boolean valid = !validateFile;

		if (validateFile) {

			connections = null;

			viewer.setInput(connections);

			IPath path = new Path(pathText.getText());

			File file = path.toFile();

			if (file.exists()) {

				try {

					InputStream is = new FileInputStream(file); 

					connections = Reader.readFromXML(RemoteConnectionsActivator.getConnectionTypeProvider(), is);

					viewer.setInput(connections);

					TableColumn[] columns = viewer.getTable().getColumns();

					for (TableColumn tableColumn : columns) {

						tableColumn.pack();

					}

					viewer.setAllChecked(true);

					valid = true;

				}

				catch (Throwable t) {

					// if we get an exception, it just means this was not a valid file

				}

			}

		}

		if (!valid) {

			setErrorMessage(Messages.getString("ImportPage.NoValidFileSelectedError")); //$NON-NLS-1$

		}

		else if (connections.isEmpty()) {

			setErrorMessage(Messages.getString("ImportPage.NoConnectionsInFileError")); //$NON-NLS-1$

			valid = false;

		}

		else if (viewer.getCheckedElements().length == 0) {

			setErrorMessage(Messages.getString("ImportPage.NoConnectionsSelectedError")); //$NON-NLS-1$

			valid = false;

		}

		return valid;

	}

}