EDIT

// $Id$

/**

* Copyright (C) 2007 EDIT

* European Distributed Institute of Taxonomy 

* http://www.e-taxonomy.eu

* 

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.taxeditor.datasource.wizard;

import java.sql.SQLException;

import org.eclipse.jface.dialogs.MessageDialog;

import org.eclipse.jface.wizard.IWizardPage;

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.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.layout.GridData;

import org.eclipse.swt.layout.GridLayout;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Group;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.Text;

import eu.etaxonomy.cdm.database.CdmDataSource;

import eu.etaxonomy.cdm.database.CdmPersistentDataSource;

import eu.etaxonomy.cdm.database.ICdmDataSource;

import eu.etaxonomy.cdm.model.name.NomenclaturalCode;

import eu.etaxonomy.taxeditor.datasource.CdmDataSourceRepository;

import eu.etaxonomy.taxeditor.model.NomenclaturalCodeHelper;

import eu.etaxonomy.taxeditor.preference.PreferencesUtil;

/**

 * <p>Abstract CdmDataSourceCredentialsWizardPage class.</p>

 *

 * @author n.hoffmann

 * @created 19.05.2009

 * @version 1.0

 */

public abstract class CdmDataSourceCredentialsWizardPage extends WizardPage implements ModifyListener {

	private ICdmDataSource dataSource;

	protected Text text_password;

	protected Text text_databaseName;

	protected Text text_dataSourceName;

	protected Text text_username;

	protected Group authenticationGroup;

	protected Group locationGroup;

	protected Group nomenclaturalCodeGroup;

	protected Composite composite;

	protected Composite parent;

	protected String name;

	protected String database;

	protected String username;

	protected String password;

	protected NomenclaturalCode nomenclaturalCode;

	CdmDataSourceWizard.Mode mode;

	/**

	 * <p>Constructor for CdmDataSourceCredentialsWizardPage.</p>

	 *

	 * @param pageName a {@link java.lang.String} object.

	 */

	protected CdmDataSourceCredentialsWizardPage(String pageName, ICdmDataSource dataSource) {

		super(pageName);

		this.setPageComplete(false);

		setDataSource(dataSource);		

		mode = CdmDataSourceWizard.Mode.CREATE;

	}

	/**

	 * <p>Constructor for CdmDataSourceCredentialsWizardPage.</p>

	 *

	 * @param pageName a {@link java.lang.String} object.

	 */

	protected CdmDataSourceCredentialsWizardPage(String pageName, ICdmDataSource dataSource, CdmDataSourceWizard.Mode mode) {

		super(pageName);

		this.setPageComplete(false);

		this.mode = mode;

		if(mode == CdmDataSourceWizard.Mode.CLONE) {

			setDataSource(CdmDataSource.NewInstance(dataSource));						

		} else {

			setDataSource(dataSource);	

		}

	}

	/* (non-Javadoc)

	 * @see org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets.Composite)

	 */

	/** {@inheritDoc} */

	public void createControl(Composite parent) {

		this.parent = parent;

		// Create top-level composite 

		parent.setLayout(new GridLayout());

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

		composite.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false,2,5));

		GridLayout formLayout = new GridLayout();

		formLayout.numColumns = 2;

		composite.setLayout(formLayout);

		// Create composite for data source name

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

		GridData datasourceGridData = new GridData(SWT.FILL, SWT.TOP, true, true,2,1);

		editDatasourceComposite.setLayoutData(datasourceGridData);

		GridLayout datasourceLayout = new GridLayout();

		datasourceLayout.numColumns = 2;

		editDatasourceComposite.setLayout(datasourceLayout);

		// Create label and input for dataSource name

		Label datasourceNameLabel = new Label(editDatasourceComposite, SWT.NONE);

		datasourceNameLabel.setText("Datasource Name:");

		text_dataSourceName = new Text(editDatasourceComposite, SWT.BORDER);

		text_dataSourceName.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));

		if(getDataSource() == null) {

			editDatasourceComposite.setVisible(false);

		}

		// create a database specific form

		createDatabaseForm();

		// create the authentication input fields

		createAuthenticationForm();

		// create nomenclatural code combo

		createNomenclaturalCodeForm();

		// Create composite for buttons

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

		buttonComposite.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, true, false));

		GridLayout buttonLayout = new GridLayout();

		buttonLayout.numColumns = 1;

		buttonComposite.setLayout(buttonLayout);

		// Create test connection button

		Button testButton = new Button(buttonComposite, SWT.NONE);

		testButton.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false));

		testButton.setText("Test connection");

		// Test connection when button is pressed

		testButton.addSelectionListener(new SelectionAdapter() {

			/* (non-Javadoc)

			 * @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse.swt.events.SelectionEvent)

			 */

			@Override

			public void widgetSelected(SelectionEvent e) {

				testDbConfiguration();

			}

		});

		setControl(composite);

		init();

	}

	/**

	 * <p>createAuthenticationForm</p>

	 */

	protected void createAuthenticationForm(){

		// Create group composite for authentication data

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

		authenticationGroup.setText("Authentication");

		authenticationGroup.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 2, 3));

		GridLayout authenticationLayout = new GridLayout();

		authenticationLayout.numColumns = 2;

		authenticationGroup.setLayout(authenticationLayout);

		// Create database name label

		Label databaseNameLabel = new Label(authenticationGroup, SWT.NONE);

		databaseNameLabel.setText("Database Name:");

		// Create database name input

		text_databaseName = new Text(authenticationGroup, SWT.BORDER);

		text_databaseName.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));

		// Create username label

		Label usernameLabel = new Label(authenticationGroup, SWT.NONE);

		usernameLabel.setText("User Name:");

		// Create username input

		text_username = new Text(authenticationGroup, SWT.BORDER);

		text_username.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));

		// Create password label

		Label passwordLabel = new Label(authenticationGroup, SWT.NONE);

		passwordLabel.setText("Password:");

		// Create password input

		text_password = new Text(authenticationGroup, SWT.BORDER | SWT.PASSWORD);

		text_password.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));

	}

	/**

	 * Initialize text fields

	 */

	public void init() {		

		removeListeners();

		if(getDataSource() != null){					

			text_dataSourceName.setText(getDataSource().getName());

			text_databaseName.setText(getDataSource().getDatabase());

			text_username.setText(getDataSource().getUsername());

			text_password.setText(getDataSource().getPassword());

		}

		// add listeners after setting text to avoid the modify event being called

		// for the initial value

		addListeners();

		// in the case of cloning we use the same datasource info

		// except for the name

		if(mode == CdmDataSourceWizard.Mode.CLONE) {

			getDataSource().setName("");			

			text_dataSourceName.setText("");			

		}

	}

	private void addListeners() {

		text_dataSourceName.addModifyListener(this);		

		text_databaseName.addModifyListener(this);

		text_username.addModifyListener(this);

		text_password.addModifyListener(this);

	}

	private void removeListeners() {

		text_dataSourceName.removeModifyListener(this);

		text_databaseName.removeModifyListener(this);

		text_username.removeModifyListener(this);

		text_password.removeModifyListener(this);

	}

	/**

	 * Create a radio button group to select a nomenclatural code from

	 */

	private void createNomenclaturalCodeForm() {

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

		nomenclaturalCodeGroup.setLayout(new GridLayout());

		nomenclaturalCode = dataSource != null ? dataSource.getNomenclaturalCode() : PreferencesUtil.getPreferredNomenclaturalCode();

		for (final NomenclaturalCode code : NomenclaturalCodeHelper.getSupportedCodes()) {

			Button button = new Button(nomenclaturalCodeGroup, SWT.RADIO);

			button.setText(NomenclaturalCodeHelper.getDescription(code));

			button.setData(code);

			if (nomenclaturalCode != null) {

				button.setSelection(nomenclaturalCode.equals(code));

			}

			button.addSelectionListener(new SelectionAdapter() {

				public void widgetSelected(SelectionEvent e) {

					nomenclaturalCode = (NomenclaturalCode) e.widget.getData();

					modifyText(null);

				}

			});

		}		

	}

	public void testDbConfiguration(){

		testDbConfiguration(false);

	}

	/**

	 * Tries to open a connection to the given dataSource. Generates a message on either

	 * failure or success

	 */

	public void testDbConfiguration(boolean ignoreSuccess){

		try{

			updateAndCheck();

			updateDataSource();

			getDataSource().testConnection();

			if(!ignoreSuccess) {

				MessageDialog.openConfirm(parent.getShell(), "Connection Test successful", "Test successful!");

			}

		} catch(SQLException e){

			MessageDialog.openWarning(parent.getShell(), "Connection Test unsuccessful", "Reason: " + e.getMessage() 

					+ System.getProperty("line.separator")    //we may use System.lineSeparator when migrated to Java 1.7

					+ System.getProperty("line.separator")

					+ "Please double check the connection fields");

			throw new RuntimeException(e);

		} catch (ClassNotFoundException e) {

			MessageDialog.openWarning(parent.getShell(), "Connection Test unsuccessful", "Reason: " + e.getMessage()					

					+ System.getProperty("line.separator")    //we may use System.lineSeparator when migrated to Java 1.7

					+ System.getProperty("line.separator")

					+ "Please double check the connection fields");

			throw new RuntimeException(e);

		} 

	}

	/**

	 * Form implementation for the specific database

	 */

	public abstract void createDatabaseForm(); 

	/**

	 * <p>updateLocation</p>

	 */

	public abstract void updateLocation();

	/**

	 * <p>updateDataSource</p>

	 */

	public abstract void updateDataSource();

	/**

	 * <p>checkPageComplete</p>

	 */

	public void checkPageComplete(){

		boolean complete = false;

		if(mode == CdmDataSourceWizard.Mode.CREATE) {

			complete = database.length() != 0;

		} else {			

			complete = name.length() != 0 && database.length() != 0;

		}	

		this.setPageComplete(complete);

	}

	/**

	 * updates the current datasource with form values

	 */

	public void updateAuthentication(){				

		database = text_databaseName.getText();

		username = text_username.getText();

		password = text_password.getText();

	}

	/* (non-Javadoc)

	 * @see org.eclipse.jface.wizard.WizardPage#getNextPage()

	 */

	/** {@inheritDoc} */

	@Override

	public IWizardPage getNextPage() {

		return null;

	}

	/**

	 * <p>Setter for the field <code>dataSource</code>.</p>

	 *

	 * @param dataSource the dataSource to set

	 */

	public void setDataSource(ICdmDataSource dataSource) {		

		this.dataSource = dataSource;

	}

	/**

	 * <p>Getter for the field <code>dataSource</code>.</p>

	 *

	 * @return the dataSource

	 */

	public ICdmDataSource getUpdatedDataSource() {

		updateDataSource();

		return dataSource;

	}

	protected ICdmDataSource getDataSource() {		

		return dataSource;

	}

	/**

	 * <p>getDataSourceName</p>

	 *

	 * @return a {@link java.lang.String} object.

	 */

	public String getDataSourceName() {

		return name;

	}

	/* (non-Javadoc)

	 * @see org.eclipse.swto.events.ModifyListener#modifyText(org.eclipse.swt.events.ModifyEvent)

	 */

	/** {@inheritDoc} */

	public void modifyText(ModifyEvent e) {

		name = text_dataSourceName.getText();

		database = text_databaseName.getText();

		switch(mode) {

		case EDIT:

			if(name.length() == 0){			

				name = "";

				setErrorMessage("DataSource name must not be empty.");

				this.setPageComplete(false);

				return;

			} else if ((!dataSource.getName().equals(name)) && (CdmDataSourceRepository.getDataSource(name) != null)) {

				name = "";

				setErrorMessage("DataSource with the same name already exists");

				this.setPageComplete(false);

				return;

			}

			break;

		case CLONE:

			if(name.length() == 0){			

				name = "";

				setErrorMessage("DataSource name must not be empty.");

				this.setPageComplete(false);

				return;

			} else if (CdmDataSourceRepository.getDataSource(name) != null) {

				name = "";

				setErrorMessage("DataSource with the same name already exists");

				this.setPageComplete(false);

				return;

			}

			break;

		default:

			break;

		}

		if(database.length() == 0){					

			setErrorMessage("Database name must not be empty.");

			this.setPageComplete(false);

		} else {			

			updateAndCheck();

			setErrorMessage(null);			

		}			

	}		

	private void updateAndCheck() {

		updateLocation();

		updateAuthentication();

		checkPageComplete();

	}

	/**

	 * <p>modifyTextWithoutTriggeringListeners</p>

	 *

	 * @param text a {@link org.eclipse.swt.widgets.Text} object.

	 * @param listener a {@link org.eclipse.swt.events.ModifyListener} object.

	 * @param string a {@link java.lang.String} object.

	 */

	protected void modifyTextWithoutTriggeringListeners(Text text, ModifyListener listener, String string){

		text.removeModifyListener(listener);

		text.setText(string);

		text.addModifyListener(listener);

	}

}