/*******************************************************************************
 * Copyright (c) 2010, 2014 BestSolution.at and others.
 *
 * 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:
 * Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation
 * Lars Vogel <Lars.Vogel@gmail.com> - Ongoing maintenance
 * Steven Spungin <steven@spungin.tv> - Bug 437951
 ******************************************************************************/
package org.eclipse.e4.tools.emf.ui.internal.common.component;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import javax.annotation.PostConstruct;
import javax.inject.Inject;

import org.eclipse.core.databinding.observable.list.IObservableList;
import org.eclipse.core.databinding.observable.value.WritableValue;
import org.eclipse.e4.tools.emf.ui.common.Util;
import org.eclipse.e4.tools.emf.ui.common.component.AbstractComponentEditor;
import org.eclipse.e4.tools.emf.ui.internal.E4Properties;
import org.eclipse.e4.tools.emf.ui.internal.ResourceProvider;
import org.eclipse.e4.tools.emf.ui.internal.common.AbstractPickList.PickListFeatures;
import org.eclipse.e4.tools.emf.ui.internal.common.E4PickList;
import org.eclipse.e4.ui.model.application.commands.MBindingContext;
import org.eclipse.e4.ui.model.application.commands.MCommandsFactory;
import org.eclipse.e4.ui.model.application.commands.impl.CommandsPackageImpl;
import org.eclipse.e4.ui.model.application.impl.ApplicationPackageImpl;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.databinding.EMFDataBindingContext;
import org.eclipse.emf.databinding.FeaturePath;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.edit.command.AddCommand;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.databinding.swt.IWidgetValueProperty;
import org.eclipse.jface.databinding.swt.typed.WidgetProperties;
import org.eclipse.jface.fieldassist.FieldDecorationRegistry;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.CTabFolder;
import org.eclipse.swt.custom.CTabItem;
import org.eclipse.swt.custom.StackLayout;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Text;

public class BindingContextEditor extends AbstractComponentEditor<MBindingContext> {
	private Composite composite;
	private EMFDataBindingContext context;

	private StackLayout stackLayout;

	private final List<Action> actions = new ArrayList<>();

	@Inject
	public BindingContextEditor() {
		super();
	}

	@PostConstruct
	void init() {
		actions.add(new Action(Messages.BindingContextEditor_AddContext,
				createImageDescriptor(ResourceProvider.IMG_BindingContext)) {
			@Override
			public void run() {
				handleAddContext();
			}
		});
	}

	@Override
	public Image getImage(Object element) {
		return getImage(element, ResourceProvider.IMG_BindingContext);
	}

	@Override
	public String getLabel(Object element) {
		return Messages.BindingContextEditor_TreeLabel;
	}

	@Override
	public String getDetailLabel(Object element) {
		final MBindingContext context = (MBindingContext) element;
		if (context.getName() != null && context.getName().trim().length() > 0) {
			return context.getName().trim();
		} else if (context.getElementId() != null && context.getElementId().trim().length() > 0) {
			return context.getElementId().trim();
		}
		return null;
	}

	@Override
	public FeaturePath[] getLabelProperties() {
		return new FeaturePath[] { FeaturePath.fromList(CommandsPackageImpl.Literals.BINDING_CONTEXT__NAME),
				FeaturePath.fromList(ApplicationPackageImpl.Literals.APPLICATION_ELEMENT__ELEMENT_ID) };
	}

	@Override
	public String getDescription(Object element) {
		return Messages.BindingContextEditor_TreeLabelDescription;
	}

	@Override
	public Composite doGetEditor(Composite parent, Object object) {
		if (composite == null) {
			context = new EMFDataBindingContext();
			if (getEditor().isModelFragment()) {
				composite = new Composite(parent, SWT.NONE);
				stackLayout = new StackLayout();
				composite.setLayout(stackLayout);
				createForm(composite, context, getMaster(), false);
				createForm(composite, context, getMaster(), true);
			} else {
				composite = createForm(parent, context, getMaster(), false);
			}
		}

		if (getEditor().isModelFragment()) {
			Control topControl;
			if (Util.isImport((EObject) object)) {
				topControl = composite.getChildren()[1];
			} else {
				topControl = composite.getChildren()[0];
			}

			if (stackLayout.topControl != topControl) {
				stackLayout.topControl = topControl;
				composite.layout(true, true);
			}
		}

		getMaster().setValue((MBindingContext) object);
		enableIdGenerator(CommandsPackageImpl.Literals.BINDING_CONTEXT__NAME,
				ApplicationPackageImpl.Literals.APPLICATION_ELEMENT__ELEMENT_ID, null);
		return composite;
	}

	private Composite createForm(Composite parent, EMFDataBindingContext context, WritableValue<MBindingContext> master,
			boolean isImport) {
		final CTabFolder folder = new CTabFolder(parent, SWT.BOTTOM);

		CTabItem item = new CTabItem(folder, SWT.NONE);
		item.setText(Messages.ModelTooling_Common_TabDefault);

		parent = createScrollableContainer(folder);
		item.setControl(parent.getParent());

		final IWidgetValueProperty<Text, String> textProp = WidgetProperties.text(SWT.Modify);

		if (getEditor().isShowXMIId() || getEditor().isLiveModel()) {
			ControlFactory.createXMIId(parent, this);
		}

		if (isImport) {
			ControlFactory.createFindImport(parent, Messages, this, context);
			folder.setSelection(0);
			return folder;
		}

		ControlFactory.createTextField(parent, Messages.ModelTooling_Common_Id, master, context, textProp,
				E4Properties.elementId(getEditingDomain()));
		ControlFactory.createTextField(parent, Messages.BindingContextEditor_Name, null, master, context, textProp,
				E4Properties.bindingContextName(getEditingDomain()), Messages.BindingContextEditor_NameWarning,
				FieldDecorationRegistry.DEC_ERROR);
		ControlFactory.createTextField(parent, Messages.BindingContextEditor_Description,
				master, context, textProp, E4Properties.description(getEditingDomain()));

		final E4PickList pickList = new E4PickList(parent, SWT.NONE, Arrays.asList(PickListFeatures.NO_PICKER),
				this, CommandsPackageImpl.Literals.BINDING_CONTEXT__CHILDREN) {
			@Override
			protected void addPressed() {
				handleAddContext();
			}

			@Override
			protected List<?> getContainerChildren(Object master) {
				return ((MBindingContext) master).getChildren();
			}
		};
		pickList.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 3, 1));
		pickList.setText(Messages.BindingContextEditor_Subcontexts);

		final TableViewer viewer = pickList.getList();

		viewer.setInput(E4Properties.bindingContextChildren(getEditingDomain()).observeDetail(master));

		item = new CTabItem(folder, SWT.NONE);
		item.setText(Messages.ModelTooling_Common_TabSupplementary);

		parent = createScrollableContainer(folder);
		item.setControl(parent.getParent());

		ControlFactory.createStringListWidget(parent, Messages, this, Messages.ModelTooling_ApplicationElement_Tags,
				ApplicationPackageImpl.Literals.APPLICATION_ELEMENT__TAGS, VERTICAL_LIST_WIDGET_INDENT);
		ControlFactory.createMapProperties(parent, Messages, this, Messages.ModelTooling_Contribution_PersistedState,
				ApplicationPackageImpl.Literals.APPLICATION_ELEMENT__PERSISTED_STATE, VERTICAL_LIST_WIDGET_INDENT);

		createContributedEditorTabs(folder, context, getMaster(), MBindingContext.class);

		folder.setSelection(0);

		return folder;
	}

	@Override
	public IObservableList<?> getChildList(Object element) {
		return E4Properties.bindingContextChildren().observe((MBindingContext) element);
	}

	protected void handleAddContext() {
		final MBindingContext eObject = MCommandsFactory.INSTANCE.createBindingContext();
		setElementId(eObject);

		final Command cmd = AddCommand.create(getEditingDomain(), getMaster().getValue(),
				CommandsPackageImpl.Literals.BINDING_CONTEXT__CHILDREN, eObject);

		if (cmd.canExecute()) {
			getEditingDomain().getCommandStack().execute(cmd);
			getEditor().setSelection(eObject);

		}
	}

	@Override
	public List<Action> getActions(Object element) {
		final ArrayList<Action> l = new ArrayList<>(super.getActions(element));
		l.addAll(actions);
		return l;
	}
}