/*******************************************************************************
 * Copyright (c) 2006, 2012 Oracle. All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0, which accompanies this distribution
 * and is available at http://www.eclipse.org/legal/epl-v10.html.
 *
 * Contributors:
 *     Oracle - initial API and implementation
 ******************************************************************************/
package org.eclipse.jpt.jpa.ui.internal.details;

import java.util.Comparator;
import java.util.List;

import org.eclipse.jpt.common.ui.WidgetFactory;
import org.eclipse.jpt.common.ui.internal.widgets.Pane;
import org.eclipse.jpt.common.utility.internal.CollectionTools;
import org.eclipse.jpt.common.utility.internal.StringConverter;
import org.eclipse.jpt.common.utility.internal.model.value.PropertyAspectAdapter;
import org.eclipse.jpt.common.utility.internal.model.value.SimpleListValueModel;
import org.eclipse.jpt.common.utility.internal.model.value.TransformationPropertyValueModel;
import org.eclipse.jpt.common.utility.model.value.ListValueModel;
import org.eclipse.jpt.common.utility.model.value.PropertyValueModel;
import org.eclipse.jpt.common.utility.model.value.WritablePropertyValueModel;
import org.eclipse.jpt.jpa.core.context.TemporalConverter;
import org.eclipse.jpt.jpa.core.context.TemporalType;
import org.eclipse.swt.widgets.Composite;

import com.ibm.icu.text.Collator;

/**
 * Here the layout of this pane:
 * <pre>
 * -----------------------------------------------------------------------------
 * |           --------------------------------------------------------------- |
 * | Temporal: |                                                           |v| |
 * |           --------------------------------------------------------------- |
 * -----------------------------------------------------------------------------</pre>
 *
 * @see ColumnMapping
 * @see TemporalType
 * @see BasicMappingComposite - A container of this pane
 * @see IdMappingComposite - A container of this pane
 * @see VersionMappingComposite - A container of this pane
 *
 * @version 2.0
 * @since 1.0
 */
public class TemporalTypeComposite extends Pane<TemporalConverter> {

	/**
	 * Creates a new <code>TemporalTypeComposite</code>.
	 *
	 * @param parentPane The parent container of this one
	 * @param parent The parent container
	 */
	public TemporalTypeComposite(PropertyValueModel<? extends TemporalConverter> subjectHolder,
	                             Composite parent,
	                             WidgetFactory widgetFactory) {

		super(subjectHolder, parent, widgetFactory);
	}

	@Override
	protected void initializeLayout(Composite container) {

		this.addCombo(
			container,
			buildTemporalTypeListHolder(),
			buildTemporalTypeHolder(),
			buildTemporalTypeConverter(),
			buildBooleanHolder()
		);
	}

	private WritablePropertyValueModel<TemporalType> buildTemporalTypeHolder() {
		return new PropertyAspectAdapter<TemporalConverter, TemporalType>(getSubjectHolder(), TemporalConverter.TEMPORAL_TYPE_PROPERTY) {
			@Override
			protected TemporalType buildValue_() {
				return this.subject.getTemporalType();
			}

			@Override
			protected void setValue_(TemporalType value) {
				this.subject.setTemporalType(value);
			}
		};
	}

	private ListValueModel<TemporalType> buildTemporalTypeListHolder() {
		return new SimpleListValueModel<TemporalType>(
			buildSortedTemporalTypeList()
		);
	}
	
	private List<TemporalType> buildSortedTemporalTypeList() {
		return CollectionTools.sort(CollectionTools.list(TemporalType.values()), this.buildTemporalTypeComparator());
	}

	private Comparator<TemporalType> buildTemporalTypeComparator() {
		return new Comparator<TemporalType>() {
			public int compare(TemporalType type1, TemporalType type2) {
				String displayString1 = displayString(type1);
				String displayString2 = displayString(type2);
				return Collator.getInstance().compare(displayString1, displayString2);
			}
		};
	}

	private StringConverter<TemporalType> buildTemporalTypeConverter() {
		return new StringConverter<TemporalType>() {
			public String convertToString(TemporalType value) {
				return (value == null) ? null : displayString(value);
			}
		};
	}

	String displayString(TemporalType temporalType) {
		switch (temporalType) {
			case DATE :
				return JptUiDetailsMessages.TemporalTypeComposite_date;
			case TIME :
				return JptUiDetailsMessages.TemporalTypeComposite_time;
			case TIMESTAMP :
				return JptUiDetailsMessages.TemporalTypeComposite_timestamp;
			default :
				throw new IllegalStateException();
		}
	}
	
	protected PropertyValueModel<Boolean> buildBooleanHolder() {
		return new TransformationPropertyValueModel<TemporalConverter, Boolean>(getSubjectHolder()) {
			@Override
			protected Boolean transform(TemporalConverter value) {
				if (getSubject() != null && getSubject().getParent().getPersistentAttribute().isVirtual()) {
					return Boolean.FALSE;
				}
				return Boolean.valueOf(value != null);
			}
		};
	}

}