EDIT

/**

* Copyright (C) 2018 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.editor.workingSet.matrix;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Collection;

import java.util.List;

import java.util.stream.Collectors;

import java.util.stream.Stream;

import org.eclipse.jface.dialogs.Dialog;

import org.eclipse.jface.layout.GridDataFactory;

import org.eclipse.jface.viewers.ArrayContentProvider;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.jface.viewers.ITableLabelProvider;

import org.eclipse.jface.viewers.LabelProvider;

import org.eclipse.jface.viewers.TableViewer;

import org.eclipse.jface.viewers.TableViewerColumn;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.FocusEvent;

import org.eclipse.swt.events.FocusListener;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.graphics.Image;

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.Control;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.Shell;

import org.eclipse.swt.widgets.Table;

import org.eclipse.swt.widgets.Text;

import eu.etaxonomy.cdm.api.service.IWorkingSetService;

import eu.etaxonomy.cdm.api.service.dto.RowWrapperDTO;

import eu.etaxonomy.cdm.common.CdmUtils;

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

import eu.etaxonomy.taxeditor.model.AbstractUtility;

import eu.etaxonomy.taxeditor.model.ImageResources;

import eu.etaxonomy.taxeditor.preference.Resources;

import eu.etaxonomy.taxeditor.store.CdmStore;

import eu.etaxonomy.taxeditor.ui.combo.taxon.TaxonNodeCombo;

/**

 * Dialog to choose specimens for the character matrix.<br>

 * Filters specimens that have already been added.

 * @author pplitzner

 * @since Jan 3, 2018

 *

 */

public class SpecimenSelectionDialog extends Dialog {

    private static final List<String> NODE_PROPERTY_PATH = Arrays.asList(new String[] {

            "taxon",

            "taxon.name",

    });

    private static String TEXT_FILTER_DEFAULT = "Enter text filter";

    private TableViewer list;

    private Collection<RowWrapperDTO> selectedSpecimens = new ArrayList<>();

    private CharacterMatrix matrix;

    private Text txtTextFilter;

    private TaxonNodeCombo comboTaxon;

    protected SpecimenSelectionDialog(Shell parentShell, CharacterMatrix matrix) {

        super(parentShell);

        this.matrix = matrix;

    }

    @Override

    protected Control createDialogArea(Composite parent) {

        Composite composite = (Composite) super.createDialogArea(parent);

        GridLayout gl_composite = new GridLayout();

        composite.setLayout(gl_composite);

        Composite composite_1 = new Composite(composite, SWT.NONE);

        composite_1.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false, 1, 1));

        composite_1.setLayout(new GridLayout(4, false));

        Label lblNewLabel = new Label(composite_1, SWT.NONE);

        lblNewLabel.setText("Taxon");

        comboTaxon = new TaxonNodeCombo(composite_1, SWT.NONE);

        comboTaxon.setInput(matrix.getWorkingSet().getTaxonSubtreeFilter());

        comboTaxon.addSelectionChangedListener(e->applyFilter());

        txtTextFilter = new Text(composite_1, SWT.BORDER);

        txtTextFilter.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));

        txtTextFilter.setText(TEXT_FILTER_DEFAULT);

        txtTextFilter.addFocusListener(new FocusListener() {

            @Override

            public void focusGained(FocusEvent e) {

                txtTextFilter.setForeground(AbstractUtility.getColor(Resources.SEARCH_VIEW_FOCUS));

                if (TEXT_FILTER_DEFAULT.equals(txtTextFilter.getText())) {

                    txtTextFilter.setText("");

                }

            }

            @Override

            public void focusLost(FocusEvent e) {

                if (CdmUtils.isBlank(txtTextFilter.getText())){

                    txtTextFilter.setForeground(AbstractUtility.getColor(Resources.SEARCH_VIEW_FOREGROUND));

                    txtTextFilter.setText(TEXT_FILTER_DEFAULT);

                }

            }

        });

        txtTextFilter.addModifyListener(e->applyFilter());

        Button btnRefreshButton = new Button(composite_1, SWT.NONE);

        btnRefreshButton.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1));

        btnRefreshButton.setToolTipText(Messages.SpecimenSelectionDialog_REFRESH);

        btnRefreshButton.setImage(ImageResources.getImage(ImageResources.REFRESH));

        btnRefreshButton.addSelectionListener(new SelectionAdapter() {

            @Override

            public void widgetSelected(SelectionEvent e) {

                loadSpecimens();

                list.setInput(matrix.getSpecimenCache());

            }

        });

        //table

        list = new TableViewer(composite, SWT.H_SCROLL | SWT.V_SCROLL | SWT.FULL_SELECTION | SWT.MULTI);

        Table table = list.getTable();

        GridData gd_table = GridDataFactory.fillDefaults().create();

        gd_table.grabExcessHorizontalSpace = true;

        gd_table.grabExcessVerticalSpace = true;

        table.setLayoutData(gd_table);

        //table columns

        TableViewerColumn columnTaxon = new TableViewerColumn(list, SWT.NONE);

        columnTaxon.getColumn().setText("Taxon");

        columnTaxon.getColumn().setWidth(200);

        columnTaxon.getColumn().setResizable(true);

        columnTaxon.getColumn().setMoveable(true);

        TableViewerColumn columnSpecimen = new TableViewerColumn(list, SWT.NONE);

        columnSpecimen.getColumn().setText("Specimen");

        columnSpecimen.getColumn().setWidth(200);

        columnSpecimen.getColumn().setResizable(true);

        columnSpecimen.getColumn().setMoveable(true);

        table.setHeaderVisible(true);

        table.setLinesVisible(true);

        list.setContentProvider(new ArrayContentProvider());

        list.setLabelProvider(new SpecimenListLabelProvider());

        //gather specimens

        if(matrix.getSpecimenCache()==null){

            loadSpecimens();

        }

        list.setInput(matrix.getSpecimenCache());

        return composite;

    }

    private void applyFilter(){

        Stream<RowWrapperDTO> filteredWrappers =matrix.getSpecimenCache().stream();

        if(comboTaxon.getSelection()!=null){

            filteredWrappers =

                    filteredWrappers

                    .filter(wrapper->wrapper.getTaxonNode().equals(comboTaxon.getSelection()));

        }

        if(!txtTextFilter.getForeground().equals(AbstractUtility.getColor(Resources.SEARCH_VIEW_FOREGROUND))

                &&!CdmUtils.isBlank(txtTextFilter.getText())){

            filteredWrappers =

                    filteredWrappers

                    .filter(wrapper->wrapper.getSpecimen().getTitleCache().toLowerCase().contains(txtTextFilter.getText().toLowerCase()));

        }

        list.setInput(filteredWrappers.collect(Collectors.toList()));

    }

    private void loadSpecimens(){

        Collection<RowWrapperDTO> specimenCache = CdmStore.getService(IWorkingSetService.class).loadSpecimens(matrix.getWorkingSet());

        matrix.setSpecimenCache(specimenCache);

    }

    @Override

    protected void configureShell(Shell newShell) {

        super.configureShell(newShell);

        newShell.setText(Messages.SpecimenSelectionDialog_SELECT_SPECIMENS);

        newShell.setMinimumSize(500, 400);

    }

    @Override

    protected void okPressed() {

        selectedSpecimens.clear();

        selectedSpecimens = ((IStructuredSelection)list.getSelection()).toList();

        super.okPressed();

    }

    @Override

    protected boolean isResizable() {

        return true;

    }

    public Collection<RowWrapperDTO> getSpecimen(){

        return selectedSpecimens;

    }

    private class SpecimenListLabelProvider extends LabelProvider implements ITableLabelProvider{

        @Override

        public Image getColumnImage(Object element, int columnIndex) {

            return null;

        }

        @Override

        public String getColumnText(Object element, int columnIndex) {

            if(element instanceof RowWrapperDTO){

                RowWrapperDTO wrapper = (RowWrapperDTO)element;

                switch (columnIndex) {

                case 0:

                    return wrapper.getTaxonNode().getTaxon().getName().getTitleCache();

                case 1:

                    return wrapper.getSpecimen().getTitleCache();

                default:

                    break;

                }

            }

            return "";

        }

    }

}