EDIT

// $Id$

/**

* Copyright (C) 2016 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.molecular.io.wizard;

import info.bioinfweb.commons.io.ContentExtensionFileFilter;

import info.bioinfweb.commons.io.ContentExtensionFileFilter.TestStrategy;

import info.bioinfweb.commons.io.ExtensionFileFilter;

import info.bioinfweb.jphyloio.formatinfo.JPhyloIOFormatInfo;

import java.io.File;

import org.eclipse.core.databinding.DataBindingContext;

import org.eclipse.core.databinding.validation.MultiValidator;

import org.eclipse.core.databinding.validation.ValidationStatus;

import org.eclipse.core.runtime.IStatus;

import org.eclipse.jface.databinding.swt.ISWTObservableValue;

import org.eclipse.jface.databinding.swt.SWTObservables;

import org.eclipse.jface.databinding.wizard.WizardPageSupport;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.layout.FormAttachment;

import org.eclipse.swt.layout.FormData;

import org.eclipse.swt.layout.FormLayout;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.widgets.Combo;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.FileDialog;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.Text;

import eu.etaxonomy.taxeditor.molecular.l10n.Messages;

/**

 * Wizard page that allows to specify which parts of a single read alignment shall be exported to an alignment file.

 *

 * @author Ben Stöver

 * @date 18.04.2016

 */

public class ExportSingleReadAlignmentFileFormatPage extends AbstractExportSingleReadAlignmentWizardPage {

    private Text fileTextField;

    private Combo formatComboBox;

    /**

     * Create the wizard.

     */

    public ExportSingleReadAlignmentFileFormatPage() {

        super("ExportSingleReadAlignmentFileFormat");  //TODO Which pageName should be used here? Any conventions? //$NON-NLS-1$

        setTitle(Messages.wizardExportAlignmentTitle);

        setDescription(Messages.wizardExportAlignmentDescription);

    }

    /**

     * Create contents of the wizard.

     *

     * @param parent the parent component

     */

    @Override

    public void createControl(Composite parent) {

        DataBindingContext dbc = new DataBindingContext();

        WizardPageSupport.create(this, dbc);

        Composite container = new Composite(parent, SWT.NULL);

        setControl(container);

        container.setLayout(new FormLayout());

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

        FormData fd_lblFormat = new FormData();

        fd_lblFormat.right = new FormAttachment(100, -10);

        fd_lblFormat.top = new FormAttachment(0, 10);

        fd_lblFormat.left = new FormAttachment(0, 10);

        lblFormat.setLayoutData(fd_lblFormat);

        lblFormat.setText(Messages.wizardExportAlignmentExportFormatLabel);

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

        FormData fd_lblSelectTheExport = new FormData();

        fd_lblSelectTheExport.right = new FormAttachment(100, -10);

        fd_lblSelectTheExport.left = new FormAttachment(0, 10);

        lblSelectTheExport.setLayoutData(fd_lblSelectTheExport);

        lblSelectTheExport.setText(Messages.wizardExportAlignmentDestinationLabel);

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

        FormData fd_lblAlignmentFile = new FormData();

        fd_lblAlignmentFile.top = new FormAttachment(lblSelectTheExport, 9);

        fd_lblAlignmentFile.right = new FormAttachment(0, 128);

        fd_lblAlignmentFile.left = new FormAttachment(0, 10);

        lblAlignmentFile.setLayoutData(fd_lblAlignmentFile);

        lblAlignmentFile.setText(Messages.wizardExportAlignmentFileLabel);

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

        FormData fd_text = new FormData();

        fd_text.left = new FormAttachment(lblAlignmentFile, 6);

        fd_text.right = new FormAttachment(100, -10);

        fd_text.top = new FormAttachment(lblSelectTheExport, 6);

        fileTextField.setLayoutData(fd_text);

        final ISWTObservableValue fileNameObservable = SWTObservables.observeText(fileTextField, SWT.Modify);

        dbc.bindValue(fileNameObservable, getWizard().getModel().getFileNameObservable());

        Button btnBrowse = new Button(container, SWT.NONE);

        btnBrowse.addSelectionListener(new SelectionAdapter() {

            @Override

            public void widgetSelected(SelectionEvent e) {

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

                dialog.setText(Messages.wizardExportAlignmentFileDialogTitle);

                ContentExtensionFileFilter filter = getSelectedFormat().createFileFilter(TestStrategy.EXTENSION);

                dialog.setFilterExtensions(new String[]{filter.getExtensionsAsString()});

                dialog.setFilterNames(new String[]{filter.getDescription()});

                String selectedFile = dialog.open();

                if (selectedFile != null) {  // Otherwise selecting was canceled.

                    fileTextField.setText(selectedFile);

                }

            }

        });

        FormData fd_btnBrowse = new FormData();

        fd_btnBrowse.bottom = new FormAttachment(fileTextField, 43, SWT.BOTTOM);

        fd_btnBrowse.top = new FormAttachment(fileTextField, 13);

        fd_btnBrowse.left = new FormAttachment(100, -128);

        fd_btnBrowse.right = new FormAttachment(100, -10);

        btnBrowse.setLayoutData(fd_btnBrowse);

        btnBrowse.setText(Messages.wizardExportAlignmentBrowseButton);

        formatComboBox = new Combo(container, SWT.READ_ONLY);

        fd_lblSelectTheExport.top = new FormAttachment(formatComboBox, 23);

        for (JPhyloIOFormatInfo formatInfo : ExportSingleReadAlignmentWizardModel.FORMATS) {

            formatComboBox.add(formatInfo.getFormatName());

        }

        FormData fd_formatComboBox = new FormData();

        fd_formatComboBox.top = new FormAttachment(lblFormat, 6);

        fd_formatComboBox.left = new FormAttachment(0, 10);

        fd_formatComboBox.right = new FormAttachment(100, -10);

        formatComboBox.setLayoutData(fd_formatComboBox);

        final ISWTObservableValue formatObservable = SWTObservables.observeSingleSelectionIndex(formatComboBox);  // ViewerProperties.singleSelection().observe(formatComboBox); falls ein ComboViewer verwendet wird. (Dann kann direkt FormatInfo verwendet werden.)

        dbc.bindValue(formatObservable, getWizard().getModel().getFormatInfoObservable());

        formatComboBox.select(0);  // Must happen after the component has been bound to the model.

        Button appendExtensionButton = new Button(container, SWT.NONE);

        appendExtensionButton.addSelectionListener(new SelectionAdapter() {

            @Override

            public void widgetSelected(SelectionEvent e) {

                fileTextField.setText(fileTextField.getText() + ExtensionFileFilter.EXTENSION_SEPARATOR +

                        getSelectedFormat().createFileFilter(TestStrategy.EXTENSION).getDefaultExtension());

            }

        });

        FormData fd_btnNewButton = new FormData();

        fd_btnNewButton.left = new FormAttachment(btnBrowse, -264, SWT.LEFT);

        fd_btnNewButton.bottom = new FormAttachment(fileTextField, 43, SWT.BOTTOM);

        fd_btnNewButton.right = new FormAttachment(btnBrowse, -6);

        fd_btnNewButton.top = new FormAttachment(fileTextField, 13);

        appendExtensionButton.setLayoutData(fd_btnNewButton);

        appendExtensionButton.setText(Messages.wizardExportAlignmentAppendExtensionButton);

        dbc.addValidationStatusProvider(new MultiValidator() {

            @Override

            protected IStatus validate() {

                String fileName = (String)fileNameObservable.getValue();

                Integer index = (Integer)formatObservable.getValue();  // If formatObservable.getValue() is not called from within this method, it is not called on modifications of the according combo anymore. (Would be interesting to know why.)

                if ((fileName == null) || fileName.isEmpty()) {

                    return ValidationStatus.error(Messages.wizardExportAlignmentErrorMissingFileName);

                }

                else if (!ExportSingleReadAlignmentWizardModel.FORMATS.get(index).createFileFilter(TestStrategy.EXTENSION).accept(

                        new File(fileName))) {

                    return ValidationStatus.warning(Messages.wizardExportAlignmentwarningMissingExtension);

                }

                else if (fileName.charAt(0) == ExtensionFileFilter.EXTENSION_SEPARATOR) {

                    return ValidationStatus.warning(Messages.wizardExportAlignmentWarningFileNameStartsDot);

                }

                else if (new File(fileName).exists()) {

                    return ValidationStatus.warning(Messages.wizardExportAlignmentWarningFileExists);

                }

                else {

                    return ValidationStatus.ok();

                }

            }

        });

    }

    private JPhyloIOFormatInfo getSelectedFormat() {

        return ExportSingleReadAlignmentWizardModel.FORMATS.get(formatComboBox.getSelectionIndex());

    }

}