/*******************************************************************************
 * Copyright (c) 2011-2015 EclipseSource Muenchen GmbH and others.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 * Lucas Koehler - initial API and implementation
 ******************************************************************************/
package org.eclipse.emf.ecp.controls.renderer.fx;

import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.util.Calendar;
import java.util.Date;

import javax.xml.datatype.DatatypeConfigurationException;
import javax.xml.datatype.DatatypeConstants;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;

import org.eclipse.core.databinding.UpdateValueStrategy;
import org.eclipse.emf.databinding.EMFUpdateValueStrategy;
import org.eclipse.emf.ecp.view.spi.context.ViewModelContext;
import org.eclipse.emf.ecp.view.spi.model.VControl;
import org.eclipse.emf.ecp.view.spi.model.VElement;
import org.eclipse.emfforms.spi.common.report.ReportService;

public class XmlDateRendererFX extends AbstractDateRendererFX {

	/**
	 * Default constructor.
	 *
	 * @param vElement the {@link VElement} to be rendered
	 * @param viewContext the {@link ViewModelContext} to use
	 * @param reportService The {@link ReportService} to use
	 */
	public XmlDateRendererFX(VControl vElement, ViewModelContext viewContext, ReportService reportService) {
		super(vElement, viewContext, reportService);
	}

	/**
	 * {@inheritDoc}
	 *
	 * @see org.eclipse.emf.ecp.controls.renderer.fx.AbstractDateRendererFX#getModelToTargetStrategy()
	 */
	@Override
	protected UpdateValueStrategy getModelToTargetStrategy() {
		return new EMFUpdateValueStrategy() {
			@Override
			public Object convert(Object value) {
				if (value == null) {
					return null;
				}

				final XMLGregorianCalendar gregorianCalendar = (XMLGregorianCalendar) value;
				final Date date = gregorianCalendar.toGregorianCalendar()
					.getTime();
				final Instant ins = Instant.ofEpochMilli(date.getTime());
				final LocalDate result = LocalDateTime.ofInstant(ins, ZoneId.systemDefault()).toLocalDate();
				return result;
			}
		};
	}

	/**
	 * {@inheritDoc}
	 *
	 * @see org.eclipse.emf.ecp.controls.renderer.fx.AbstractDateRendererFX#getTargetToModelStrategy()
	 */
	@Override
	protected UpdateValueStrategy getTargetToModelStrategy() {
		return new EMFUpdateValueStrategy() {
			@Override
			public Object convert(Object value) {
				if (value == null) {
					return null;
				}
				final LocalDate localDate = (LocalDate) value;
				final Instant ins = localDate.atStartOfDay().atZone(ZoneId.systemDefault()).toInstant();
				final Date date = Date.from(ins);
				final Calendar targetCal = Calendar.getInstance();
				targetCal.setTime(date);
				XMLGregorianCalendar result = null;
				try {
					result = DatatypeFactory.newInstance().newXMLGregorianCalendar();
					result.setYear(targetCal.get(Calendar.YEAR));
					result.setMonth(targetCal.get(Calendar.MONTH) + 1);
					result.setDay(targetCal.get(Calendar.DAY_OF_MONTH));
					result.setTimezone(DatatypeConstants.FIELD_UNDEFINED);
				} catch (final DatatypeConfigurationException ex) {
					ex.printStackTrace();
					// TODO: log properly
				}
				return result;
			}
		};
	}

}