EDIT

/**

* Copyright (C) 2019 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.preference;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import java.util.UUID;

import javax.inject.Inject;

import org.eclipse.e4.core.di.annotations.Optional;

import org.eclipse.e4.ui.di.UIEventTopic;

import org.eclipse.jface.util.IPropertyChangeListener;

import org.eclipse.jface.util.PropertyChangeEvent;

import org.eclipse.swt.SWT;

import org.eclipse.swt.custom.CLabel;

import org.eclipse.swt.custom.TableEditor;

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.Control;

import org.eclipse.swt.widgets.Event;

import org.eclipse.swt.widgets.Listener;

import org.eclipse.swt.widgets.Table;

import org.eclipse.swt.widgets.TableColumn;

import org.eclipse.swt.widgets.TableItem;

import eu.etaxonomy.cdm.model.location.NamedArea;

import eu.etaxonomy.cdm.model.metadata.CdmPreference;

import eu.etaxonomy.cdm.model.metadata.PreferencePredicate;

import eu.etaxonomy.cdm.model.metadata.PreferenceResolver;

import eu.etaxonomy.taxeditor.event.WorkbenchEventConstants;

import eu.etaxonomy.taxeditor.l10n.Messages;

import eu.etaxonomy.taxeditor.model.ImageResources;

import eu.etaxonomy.taxeditor.preference.menu.CdmPreferencePage;

import eu.etaxonomy.taxeditor.store.CdmStore;

import eu.etaxonomy.taxeditor.ui.element.CommandHandlerButton;

/**

 * @author k.luther

 * @since 02.07.2019

 *

 */

public class DistributionStatusAndNamedAreaVocabularies extends CdmPreferencePage implements IPropertyChangeListener{

    protected String commandHandlerString;

    protected String commandHandlerStringStatus;

    protected List<CdmPreference> prefStatus;

    protected List<CdmPreference> prefStatusToDelete = new ArrayList<>();

    protected CdmPreference prefAreaVoc;

    private CommandHandlerButton button_openSelectAreaVocabularies;

    private CommandHandlerButton button_openStatusWizard;

    private Map<UUID, NamedArea> namedAreaUUIDMap = new HashMap();

    private Table table;

    /**

     * {@inheritDoc}

     */

    @Override

    protected Control createContents(Composite parent) {

        getValues();

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

        composite.setLayout(new GridLayout());

        GridData textGrid = createTextGridData();

        textGrid.verticalSpan = 2;

        if (isAdminPreference){

            final CLabel labelPerAreaStatus = new CLabel(composite, SWT.NULL);

            labelPerAreaStatus.setText(Messages.DistributionAdminPreferences_PER_AREA_STATUS);

            labelPerAreaStatus.setLayoutData(textGrid);

            createTable(composite);

        }

        final CLabel labelStatus = new CLabel(composite, SWT.NULL);

        labelStatus.setText(Messages.DistributionAdminPreferences_SELECT_STATUS);

        labelStatus.setLayoutData(textGrid);

        composite.pack ();

        button_openStatusWizard = new CommandHandlerButton(composite, SWT.PUSH, commandHandlerStringStatus);

        button_openStatusWizard.setText(Messages.Distribution_status_selection);

        button_openStatusWizard.addListener(SWT.Selection, new Listener() {

            @Override

            public void handleEvent(Event e) {

                switch (e.type) {

                case SWT.Selection:

                    setApply(true);

                    break;

                }

            }

        });

        final CLabel label = new CLabel(composite, SWT.NULL);

        label.setText(Messages.ChecklistEditorGeneralPreference_open_wizard);

        label.setLayoutData(textGrid);

        button_openSelectAreaVocabularies = new CommandHandlerButton(composite, SWT.PUSH, commandHandlerString);

        button_openSelectAreaVocabularies

                .setText(Messages.ChecklistEditorGeneralPreference_open_distribution_selection);

        if (!isAdminPreference){

            if (prefAreaVoc != null && !prefAreaVoc.isAllowOverride()) {

                button_openSelectAreaVocabularies.setButtonEnabled(false);

            }

//            if (prefStatus != null && !prefStatus.isAllowOverride()) {

//                button_openStatusWizard.setButtonEnabled(false);

//            }

        }

        return composite;

    }

    public void createTable(Composite composite) {

        table = new Table(

                composite, SWT.BORDER /*| SWT.CHECK */| SWT.FULL_SELECTION | SWT.SINGLE

        );

        table.setLinesVisible(true);

        table.setHeaderVisible(true);

        GridData tableGrid = createTextGridData();

        table.setLayoutData(tableGrid);

        Iterator<CdmPreference> prefIterator = prefStatus.iterator();

        CdmPreference pref;

        TableColumn column = new TableColumn(table, SWT.NONE);

        column.setText("Predicate/Subject");

        column.setWidth(500);

        column = new TableColumn(table, SWT.NONE);

        if (isAdminPreference){

            column.setText("Allow Override");

        }else{

            column.setText("Use Default");

        }

        column.setWidth(100);

        column = new TableColumn(table, SWT.NONE);

        column.setText("Delete");

        column.setWidth(100);

        while (prefIterator.hasNext()){

            pref = prefIterator.next();

            createTableRow(pref);

        }

    }

    public void createTableRow(CdmPreference pref) {

        TableItem item = new TableItem(table, SWT.NONE);

        for (int col = 0; col < 3; col ++) {

            String namedAreaString = null;

            if (col == 0){

               String uuidString = getUUIDFromSubject(pref);

               if (uuidString != null){

                   try{

                   UUID uuid = UUID.fromString(uuidString);

                   namedAreaString = namedAreaUUIDMap.get(UUID.fromString(uuidString)).getLabel();

                   }catch(IllegalArgumentException e){

                       // no UUID

                   }

               }

               if (namedAreaString != null){

                   String subjectString = pref.getSubjectString().replace(pref.getSubject().getLastPart(), namedAreaString);

                   item.setText(col, pref.getPredicate() +subjectString);

               }else{

                   item.setText(col, pref.getPredicate() +pref.getSubjectString());

               }

            }else if (col == 1) {

                Button allowOverrideButton = new Button(table, SWT.CHECK);

                allowOverrideButton.setData(pref);

                TableEditor editor = new TableEditor(table);

                editor.horizontalAlignment = SWT.LEFT;

                editor.grabHorizontal = true;

                editor.setEditor(allowOverrideButton, item, col);

                allowOverrideButton.setSelection(pref.isAllowOverride());

                allowOverrideButton.addSelectionListener(new SelectionAdapter(){

                    @Override

                    public void widgetSelected(SelectionEvent e){

                        setApply(true);

                        Button thisButton= (Button) e.widget;

                        CdmPreference preference=(CdmPreference)thisButton.getData();

                        preference = PreferenceResolver.resolve(prefStatus, preference.getKey());

                        if (isAdminPreference){

                            preference.setAllowOverride(!preference.isAllowOverride());

                        }else{

                        }

                    }

                  });

            } else if (col == 2){

                Button delButton = new Button(table, SWT.PUSH);

                delButton.setImage(ImageResources

                        .getImage(ImageResources.TRASH_ICON));

                delButton.setData(pref);

                delButton.pack();

                delButton.addSelectionListener(new SelectionAdapter(){

                    @Override

                    public void widgetSelected(SelectionEvent e){

                        Button thisButton= (Button) e.widget;

                        CdmPreference preference=(CdmPreference)thisButton.getData();

                        int index = prefStatus.indexOf(preference);

                        table.getItem(index).setText("Deleted");

                        //prefStatus.remove(preference);

                        prefStatusToDelete.add(preference);

                        setApply(true);

                    }

                  });

                TableEditor editor = new TableEditor(table);

                editor.horizontalAlignment = SWT.LEFT;

                editor.grabHorizontal = true;

                editor.setEditor(delButton, item, col);

            }

        }

    }

    @Override

    public void getValues() {

        isAdminPreference = false;

        CdmPreferenceCache cache = CdmPreferenceCache.instance();

        cache.getAllTaxEditorDBPreferences();

        prefAreaVoc = PreferencesUtil.getPreferenceFromDB(PreferencePredicate.AvailableDistributionAreaVocabularies);

        if (prefAreaVoc == null){

            prefAreaVoc = CdmPreference.NewTaxEditorInstance(PreferencePredicate.AvailableDistributionAreaVocabularies, PreferencePredicate.AvailableDistributionAreaVocabularies.getDefaultValue() != null ?  PreferencePredicate.AvailableDistributionAreaVocabularies.getDefaultValue().toString(): null);

        }

        prefStatus = cache.getAllForPredicate(PreferencePredicate.AvailableDistributionStatus.getKey());

        if (prefStatus == null){

            prefStatus = new ArrayList();

            CdmPreference statusPref = CdmPreference.NewTaxEditorInstance(PreferencePredicate.AvailableDistributionStatus, PreferencePredicate.AvailableDistributionStatus.getDefaultValue() != null ?  PreferencePredicate.AvailableDistributionStatus.getDefaultValue().toString(): null);

            prefStatus.add(statusPref);

        }

        createNamedAreaUUIDMap();

        commandHandlerString = "eu.etaxonomy.taxeditor.store.open.OpenDistributionEditorWizardHandler";

        commandHandlerStringStatus = "eu.etaxonomy.taxeditor.store.open.OpenDistributionStatusWizardHandler";

        setApply(true);

    }

    /**

     *

     */

    private void createNamedAreaUUIDMap() {

        List<UUID> uuids = new ArrayList();

        for (CdmPreference pref: prefStatus){

            try{

                String lastPart = getUUIDFromSubject(pref);

                UUID uuid = UUID.fromString(lastPart);

                uuids.add(uuid);

            }catch (IllegalArgumentException e){

                // no uuid in subject

            }

        }

        if (!uuids.isEmpty()){

            List<NamedArea> areas =CdmStore.getTermManager().getTerms(uuids, NamedArea.class);

            for (NamedArea area: areas){

                namedAreaUUIDMap.put(area.getUuid(), area);

            }

        }

    }

    public String getUUIDFromSubject(CdmPreference pref) {

        String lastPart = pref.getSubject().getLastPart();

        lastPart = lastPart.replace("NamedArea[", "");

        lastPart = lastPart.replace("]", "");

        return lastPart;

    }

    @Override

    protected void performDefaults() {

        if (!isAdminPreference){

            if (!prefAreaVoc.isAllowOverride()) {

                button_openSelectAreaVocabularies.setButtonEnabled(false);

            }

        }

        prefStatus = null;

        prefAreaVoc = null;

        setApply(true);

        refresh();

    }

    @Override

    public boolean performOk(){

        if (!isApply()){

            return true;

        }

        if (prefStatus == null){

            List<CdmPreference> prefsToDelete =PreferencesUtil.getPreference(PreferencePredicate.AvailableDistributionStatus);

            PreferencesUtil.removeFromDB(prefsToDelete);

        }

        if (prefAreaVoc == null){

            List<CdmPreference> prefsToDelete =PreferencesUtil.getPreference(PreferencePredicate.AvailableDistributionAreaVocabularies);

            PreferencesUtil.removeFromDB(prefsToDelete);

        }

        List<CdmPreference> toDelete = new ArrayList<>();

        for (CdmPreference pref:prefStatusToDelete){

            CdmPreference prefToDelete = CdmPreference.NewInstance(pref.getKey(), null);

            toDelete.add(prefToDelete);

        }

        prefStatus.addAll(toDelete);

        PreferencesUtil.setPreferencesToDB(prefStatus);

        return true;

    }

    @Inject

    @Optional

    public void updateView(@UIEventTopic(WorkbenchEventConstants.REFRESH_DATASOURCE)boolean refresh){

        if(refresh){

            refresh();

        }

    }

    @Override

    public void propertyChange(PropertyChangeEvent event) {

        if (event != null

                && PreferencesUtil.PREFERRED_TERMS_CHANGE.equals(event

                        .getProperty())) {

            refresh();

        }

    }

    /**

     *

     */

    private void refresh() {

        getValues();

        table.removeAll();

        Iterator<CdmPreference> prefIterator = prefStatus.iterator();

        CdmPreference pref;

        while (prefIterator.hasNext()){

            pref = prefIterator.next();

            createTableRow(pref);

        }

        table.redraw();

        table.pack();

    }

}