EDIT

/**

 * 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.databaseAdmin.preferencePage;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.Map.Entry;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.layout.GridLayout;

import org.eclipse.swt.widgets.Combo;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

import eu.etaxonomy.cdm.api.application.ICdmRepository;

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

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

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

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

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

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

import eu.etaxonomy.taxeditor.model.NomenclaturalCodeHelper;

import eu.etaxonomy.taxeditor.preference.PreferencesUtil;

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

import eu.etaxonomy.taxeditor.store.CdmStore;

/**

 * <p>

 * NomenclaturalCodePreferences class.

 * </p>

 *

 * @author k.luther

 * @created 14.09.2018

 */

public class NomenclaturalCodePreferences extends CdmPreferencePage implements IE4AdminPreferencePage{

    String actualCode;

    Map<String, String>  labelAndValues;

    Map<String, Integer> keyAndIndex;

    Combo nomenclaturalCode;

	@Override

	protected Control createContents(Composite parent) {

//	    PreferencesUtil.setPreferredNomenclaturalCode(null, false);

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

        composite.setLayout(new GridLayout());

        nomenclaturalCode= new Combo(composite, SWT.READ_ONLY);

        nomenclaturalCode.setText("Available Codes");

        nomenclaturalCode.setFont(parent.getFont());

        getLabelAndValues();

        keyAndIndex = new HashMap<>();

        Integer index = 0;

        for (String key: labelAndValues.keySet()) {

            nomenclaturalCode.add(labelAndValues.get(key));

            keyAndIndex.put(key, index);

            index++;

        }

        index = keyAndIndex.get(actualCode);

        nomenclaturalCode.select(index);

        nomenclaturalCode.addSelectionListener(new SelectionAdapter() {

            @Override

            public void widgetSelected(SelectionEvent evt) {

                String name = nomenclaturalCode.getText();

                for (Entry<String, String> label:labelAndValues.entrySet()){

                    if (label.getValue().equals(name)){

                        actualCode = label.getKey();

                    }

                }

//                actualCode = labelAndValues.get(name);;

            }

        });

        return composite;

	}

	/**

	 * @return

	 */

	private Map<String, String> getLabelAndValues() {

		List<NomenclaturalCode> supportedCodes = NomenclaturalCodeHelper

				.getSupportedCodes();

		labelAndValues = new HashMap<>();

		for (int i = 0; i < supportedCodes.size(); i++) {

			labelAndValues.put(PreferencesUtil.getPreferenceKey(supportedCodes.get(i)), NomenclaturalCodeHelper

                    .getDescription(supportedCodes.get(i))) ;

		}

		return labelAndValues;

	}

	/**

	 * {@inheritDoc}

	 *

	 * Initialize the preference page

	 */

    @Override

    public void init() {

        super.init();

        if(!CdmStore.isActive()){

            return;

        }

	      ICdmRepository controller = CdmStore.getCurrentApplicationConfiguration();

          if (controller != null){

              IPreferenceService service = controller.getPreferenceService();

              PrefKey key = CdmPreference.NewKey(PreferenceSubject.NewDatabaseInstance(), PreferencePredicate.NomenclaturalCode);

              CdmPreference pref = service.find(key);

              if (pref != null){

                  actualCode = pref.getValue();

              }

          }

	}

	@Override

	 public boolean performOk() {

		boolean result = super.performOk();

		if (labelAndValues != null){

		    String key = labelAndValues.get(actualCode);

    		NomenclaturalCode preferredCode = NomenclaturalCode.getByKey(actualCode);

    		PreferencesUtil.setPreferredNomenclaturalCode(actualCode, false);

		}

        return result;

    }

}