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.ui.combo;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Collection;

import java.util.LinkedHashMap;

import java.util.List;

import java.util.Map.Entry;

import org.eclipse.swt.events.SelectionEvent;

import eu.etaxonomy.cdm.model.common.IEnumTerm;

import eu.etaxonomy.cdm.model.common.OriginalSourceType;

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

import eu.etaxonomy.cdm.model.occurrence.SpecimenOrObservationType;

import eu.etaxonomy.cdm.model.reference.ReferenceType;

import eu.etaxonomy.taxeditor.model.AbstractUtility;

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

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

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

/**

 * @author n.hoffmann

 * @created Mar 16, 2010

 * @version 1.0

 */

public class EnumComboElement<T extends IEnumTerm<T>> extends

		AbstractComboElement<T>  {

	//TODO RL

	public void setVisible(boolean b){

		combo.setVisible(b);

	}

	private static CdmEnumDataHolder[] cdmEnumDataHolders = {

		new CdmEnumDataHolder<NomenclaturalCode>(){

			@Override

			public String getName() {

				return "Nomenclatural Code";

			}

			@Override

			public Collection<NomenclaturalCode> getElements() {

				return  Arrays.asList(NomenclaturalCode.values());

			}

			@Override

			public Class<NomenclaturalCode> getClazz() {

				return NomenclaturalCode.class;

			}

		},

		new CdmEnumDataHolder<ReferenceType>(){

			@Override

			public String getName() {

				return "Reference Type";

			}

			@Override

			public Collection<ReferenceType> getElements() {

				return Arrays.asList(ReferenceType.values());

			}

			@Override

			public Class<ReferenceType> getClazz() {

				return ReferenceType.class;

			}

		},

		new CdmEnumDataHolder<SpecimenOrObservationType>(){

			@Override

			public String getName() {

				return "Specimen / Observation Type";

			}

			@Override

			public Collection<SpecimenOrObservationType> getElements() {

				return Arrays.asList(SpecimenOrObservationType.values());

			}

			@Override

			public Class<SpecimenOrObservationType> getClazz() {

				return SpecimenOrObservationType.class;

			}

		},

		new CdmEnumDataHolder<OriginalSourceType>(){

			@Override

			public String getName() {

				return "Original Source Type";

			}

			@Override

			public Collection<OriginalSourceType> getElements() {

				return Arrays.asList(OriginalSourceType.values());

			}

			@Override

			public Class<OriginalSourceType> getClazz() {

				return OriginalSourceType.class;

			}

		}

	};

	protected List<T> elementTypeList = new ArrayList<T>();

	private final Class<T> enumType;

	public EnumComboElement(CdmFormFactory formFactory,

			ICdmFormElement parentElement, Class<T> enumType, int style) {

		super(formFactory, parentElement);

		this.enumType = enumType;

		label.setText(getDefaultLabelString());

		populateTypes();

		combo.addSelectionListener(this);

	}

	private String getDefaultLabelString() {

		if(enumType.equals(ReferenceType.class)){

			return "Reference Type";

		} else if (enumType.equals(NomenclaturalCode.class)){

			return "Nomenclatural Code";

		} else if(enumType.equals(OriginalSourceType.class)) {

			return "Orig. Source Type";

		} else if(enumType.equals(SpecimenOrObservationType.class)) {

			return "Spec./Obs. Type";

		}

		return "No Label";

	}

    private void populateTypes(){

        Collection<T> elementsForClass = getElementsForClass(enumType);

        // special hierarchical order for specimens

        if(enumType.equals(SpecimenOrObservationType.class)){

            LinkedHashMap<T, String> orderedTerms = AbstractUtility.orderTerms(elementsForClass);

            for(Entry<T, String> keyLabelPair : orderedTerms.entrySet()){

                elementTypeList.add(keyLabelPair.getKey());

                combo.add(keyLabelPair.getValue());

            }

        }

        // default order

        else{

            for(T enumElement : getElementsForClass(enumType)){

                elementTypeList.add(enumElement);

                combo.add(((Enum) enumElement).name());

            }

        }

	}

	@Override

    public void setSelection(T selection) {

		this.selection = selection;

		combo.select(elementTypeList.indexOf(selection));

	}

	/** {@inheritDoc} */

	@Override

    public void widgetSelected(SelectionEvent e) {

		selection = elementTypeList.get(combo.getSelectionIndex());

		firePropertyChangeEvent(new CdmPropertyChangeEvent(this, e));

	}

	private Collection<T> getElementsForClass(Class<T> clazz){

		CdmEnumDataHolder<T> dataHolder = getCdmEnumDataHolderForClass(clazz);

		if (dataHolder != null) {

			return dataHolder.getElements();

		}

		return null;

	}

	private CdmEnumDataHolder<T> getCdmEnumDataHolderForClass(Class<T> clazz){

		for (CdmEnumDataHolder dataHolder : cdmEnumDataHolders) {

			if (dataHolder.getClazz().equals(clazz)){

				return dataHolder;

			}

		}

		return null;

	}

	private interface CdmEnumDataHolder<T> {

		Class<T> getClazz();

		String getName();

		Collection<T> getElements();

	}

}