/*******************************************************************************
 * Copyright (c) 2008-2011 Chair for Applied Software Engineering,
 * Technische Universitaet Muenchen.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 * deser
 ******************************************************************************/
package org.eclipse.emf.emfstore.internal.client.ui.dialogs.admin.acimport;

import java.util.Properties;

import javax.naming.Context;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.emf.emfstore.internal.client.ui.Activator;
import org.eclipse.emf.emfstore.internal.client.ui.dialogs.EMFStoreMessageDialog;
import org.eclipse.jface.dialogs.ProgressMonitorDialog;
import org.eclipse.jface.dialogs.TitleAreaDialog;
import org.eclipse.jface.layout.GridLayoutFactory;
import org.eclipse.jface.layout.LayoutConstants;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.PlatformUI;

/**
 * @author deser
 */
public class LdapSourceDialog extends TitleAreaDialog {

	private boolean isOkPressed;
	private Text serverName;
	private Text ldapBase;
	private final LdapImportSource ldapImport;
	private boolean isInitFinished;

	/**
	 * @param parentShell
	 *            the parent shell
	 * @param ldapImport
	 *            LDAP import
	 */
	public LdapSourceDialog(Shell parentShell, LdapImportSource ldapImport) {
		super(parentShell);
		this.ldapImport = ldapImport;
		setTitle(Messages.LdapSourceDialog_LDAPImport);
		isInitFinished = false;
	}

	/**
	 * @param parent
	 *            parent composite
	 * @return Control
	 * @see org.eclipse.jface.dialogs.TitleAreaDialog#createDialogArea(org.eclipse.swt.widgets.Composite)
	 */
	@Override
	protected Control createDialogArea(Composite parent) {
		// Set the specific help for this Composite
		PlatformUI.getWorkbench().getHelpSystem().setHelp(parent, Activator.PLUGIN_ID + ".help_import_ldap"); //$NON-NLS-1$

		final Composite contents = new Composite(parent, SWT.NONE);
		contents.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

		setTitle(Messages.LdapSourceDialog_LDAPServerData);
		setMessage(Messages.LdapSourceDialog_EnterServerData);

		final Label name = new Label(contents, SWT.NULL);
		name.setText(Messages.LdapSourceDialog_ServerName);
		serverName = new Text(contents, SWT.SINGLE | SWT.BORDER);
		serverName.setSize(
			convertHorizontalDLUsToPixels(350),
			convertVerticalDLUsToPixels(20));

		final Label desc = new Label(contents, SWT.NULL);
		desc.setText(Messages.LdapSourceDialog_ServerBase);
		ldapBase = new Text(contents, SWT.SINGLE | SWT.BORDER);
		ldapBase.setSize(
			convertHorizontalDLUsToPixels(350),
			convertVerticalDLUsToPixels(20));

		final Point defaultMargins = LayoutConstants.getMargins();
		GridLayoutFactory.fillDefaults().numColumns(2).margins(defaultMargins.x, defaultMargins.y)
			.generateLayout(contents);

		return contents;
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void okPressed() {
		final ProgressMonitorDialog progressMonitorDialog = new ProgressMonitorDialog(getShell());
		progressMonitorDialog.open();
		progressMonitorDialog.getProgressMonitor().beginTask(Messages.LdapSourceDialog_Connecting,
			IProgressMonitor.UNKNOWN);

		final Properties serverProperties = new Properties();

		serverProperties.put(Context.PROVIDER_URL, serverName.getText());
		serverProperties.put(LdapImportSource.LDAP_BASE, ldapBase.getText());

		ldapImport.setProperties(serverProperties);
		try {
			ldapImport.connect();
			isInitFinished = true;
			progressMonitorDialog.close();
		} catch (final CorruptedSourceException e) {
			progressMonitorDialog.close();
			isInitFinished = false;
			EMFStoreMessageDialog.showExceptionDialog(Messages.LdapSourceDialog_ExceptionMessage, e);
		}

		isOkPressed = true;
		close();
	}

	/**
	 * @see org.eclipse.jface.dialogs.Dialog#cancelPressed()
	 */
	@Override
	protected void cancelPressed() {
		isOkPressed = false;
		close();
	}

	/**
	 * @return whether the initialization is completed (OK was pressed and a
	 *         connection to the given server has been established).
	 */
	public boolean getIsInitFinished() {
		return isOkPressed && isInitFinished;
	}

}