/*******************************************************************************
 * Copyright (c) 2007, 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 org.eclipse.jpt.common.ui.WidgetFactory;
import org.eclipse.jpt.common.ui.internal.widgets.Pane;
import org.eclipse.jpt.common.utility.internal.model.value.PropertyAspectAdapter;
import org.eclipse.jpt.common.utility.internal.model.value.SimplePropertyValueModel;
import org.eclipse.jpt.common.utility.internal.model.value.TransformationPropertyValueModel;
import org.eclipse.jpt.common.utility.model.value.PropertyValueModel;
import org.eclipse.jpt.common.utility.model.value.ModifiablePropertyValueModel;
import org.eclipse.jpt.jpa.core.context.Column;
import org.eclipse.jpt.jpa.core.context.Converter;
import org.eclipse.jpt.jpa.core.context.ConvertibleMapping;
import org.eclipse.jpt.jpa.core.context.TemporalConverter;
import org.eclipse.jpt.jpa.core.context.VersionMapping;
import org.eclipse.jpt.jpa.ui.details.JpaComposite;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;

/**
 * Here the layout of this pane:
 * <pre>
 * -----------------------------------------------------------------------------
 * | ------------------------------------------------------------------------- |
 * | |                                                                       | |
 * | | ColumnComposite                                                       | |
 * | |                                                                       | |
 * | ------------------------------------------------------------------------- |
 * | ------------------------------------------------------------------------- |
 * | |                                                                       | |
 * | | TemporalTypeComposite                                                 | |
 * | |                                                                       | |
 * | ------------------------------------------------------------------------- |
 * -----------------------------------------------------------------------------</pre>
 *
 * @see VersionMapping
 * @see ColumnComposite
 * @see TemporalTypeComposite
 *
 * @version 2.3
 * @since 1.0
 */
public abstract class AbstractVersionMappingComposite<T extends VersionMapping> 
	extends Pane<T>
	implements JpaComposite
{
	/**
	 * Creates a new <code>VersionMappingComposite</code>.
	 *
	 * @param subjectHolder The holder of the subject <code>IVersionMapping</code>
	 * @param parent The parent container
	 * @param widgetFactory The factory used to create various common widgets
	 */
	protected AbstractVersionMappingComposite(PropertyValueModel<? extends T> subjectHolder,
	                               Composite parent,
	                               WidgetFactory widgetFactory) {

		super(subjectHolder, parent, widgetFactory);
	}

	@Override
	protected void initializeLayout(Composite container) {
		initializeVersionCollapsibleSection(container);
		initializeTypeCollapsibleSection(container);
	}
	
	protected void initializeVersionCollapsibleSection(Composite container) {
		container = addCollapsibleSection(
			container,
			JptUiDetailsMessages.VersionSection_title,
			new SimplePropertyValueModel<Boolean>(Boolean.TRUE)
		);

		this.initializeVersionSection(container);
	}

	protected abstract void initializeVersionSection(Composite container);

	protected void initializeTypeCollapsibleSection(Composite container) {
		container = addCollapsibleSection(
			container,
			JptUiDetailsMessages.TypeSection_type
		);
		this.initializeTypeSection(container);
	}
	
	protected void initializeTypeSection(Composite container) {
		((GridLayout) container.getLayout()).numColumns = 2;

		// No converter
		Button noConverterButton = addRadioButton(
			container, 
			JptUiDetailsMessages.TypeSection_default, 
			buildConverterBooleanHolder(null), 
			null);
		((GridData) noConverterButton.getLayoutData()).horizontalSpan = 2;
				
		PropertyValueModel<Converter> converterHolder = buildConverterHolder();
		// Temporal
		addRadioButton(
			container, 
			JptUiDetailsMessages.TypeSection_temporal, 
			buildConverterBooleanHolder(TemporalConverter.class), 
			null);
		registerSubPane(new TemporalTypeComposite(buildTemporalConverterHolder(converterHolder), container, getWidgetFactory()));
	}

	protected PropertyValueModel<Column> buildColumnHolder() {
		return new TransformationPropertyValueModel<T, Column>(getSubjectHolder()) {
			@Override
			protected Column transform_(T value) {
				return value.getColumn();
			}
		};
	}

	protected ModifiablePropertyValueModel<Boolean> buildConverterBooleanHolder(final Class<? extends Converter> converterType) {
		return new PropertyAspectAdapter<T, Boolean>(getSubjectHolder(), ConvertibleMapping.CONVERTER_PROPERTY) {
			@Override
			protected Boolean buildValue_() {
				Converter converter = this.subject.getConverter();
				return Boolean.valueOf(converter.getType() == converterType);
			}

			@Override
			protected void setValue_(Boolean value) {
				if (value.booleanValue()) {
					this.subject.setConverter(converterType);
				}
			}
		};
	}

	private PropertyValueModel<Converter> buildConverterHolder() {
		return new PropertyAspectAdapter<VersionMapping, Converter>(getSubjectHolder(), ConvertibleMapping.CONVERTER_PROPERTY) {
			@Override
			protected Converter buildValue_() {
				return this.subject.getConverter();
			}
		};
	}
	
	private PropertyValueModel<TemporalConverter> buildTemporalConverterHolder(PropertyValueModel<Converter> converterHolder) {
		return new TransformationPropertyValueModel<Converter, TemporalConverter>(converterHolder) {
			@Override
			protected TemporalConverter transform_(Converter converter) {
				return converter.getType() == TemporalConverter.class ? (TemporalConverter) converter : null;
			}
		};
	}
}