package org.eclipse.e4.tools.emf.ui.internal.common.component;

import java.util.ArrayList;
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.core.resources.IProject;
import org.eclipse.e4.core.contexts.IEclipseContext;
import org.eclipse.e4.core.di.annotations.Optional;
import org.eclipse.e4.tools.emf.ui.common.IEditorFeature.FeatureClass;
import org.eclipse.e4.tools.emf.ui.common.ImageTooltip;
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.ComponentLabelProvider;
import org.eclipse.e4.tools.emf.ui.internal.common.FeatureClassLabelProvider;
import org.eclipse.e4.tools.emf.ui.internal.common.ModelEditor;
import org.eclipse.e4.tools.emf.ui.internal.common.component.ControlFactory.TextPasteHandler;
import org.eclipse.e4.tools.emf.ui.internal.common.component.dialogs.PartIconDialogEditor;
import org.eclipse.e4.tools.emf.ui.internal.common.uistructure.UIViewer;
import org.eclipse.e4.tools.emf.ui.internal.imp.ModelImportWizard;
import org.eclipse.e4.tools.emf.ui.internal.imp.RegistryUtil;
import org.eclipse.e4.ui.model.application.impl.ApplicationPackageImpl;
import org.eclipse.e4.ui.model.application.ui.MUIElement;
import org.eclipse.e4.ui.model.application.ui.advanced.impl.AdvancedPackageImpl;
import org.eclipse.e4.ui.model.application.ui.basic.MCompositePart;
import org.eclipse.e4.ui.model.application.ui.basic.MPart;
import org.eclipse.e4.ui.model.application.ui.basic.MPartSashContainerElement;
import org.eclipse.e4.ui.model.application.ui.basic.impl.BasicPackageImpl;
import org.eclipse.e4.ui.model.application.ui.impl.UiPackageImpl;
import org.eclipse.emf.common.command.Command;
import org.eclipse.emf.databinding.EMFDataBindingContext;
import org.eclipse.emf.databinding.FeaturePath;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.util.EcoreUtil;
import org.eclipse.emf.edit.command.AddCommand;
import org.eclipse.emf.edit.command.RemoveCommand;
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.databinding.viewers.IViewerValueProperty;
import org.eclipse.jface.databinding.viewers.ObservableListContentProvider;
import org.eclipse.jface.databinding.viewers.typed.ViewerProperties;
import org.eclipse.jface.layout.GridDataFactory;
import org.eclipse.jface.resource.FontDescriptor;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.ComboViewer;
import org.eclipse.jface.viewers.DelegatingStyledCellLabelProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.window.Window;
import org.eclipse.jface.wizard.WizardDialog;
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.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

public class CompositePartEditor extends AbstractComponentEditor<MCompositePart> {
	private Composite composite;
	private EMFDataBindingContext context;
	private StackLayout stackLayout;
	private final List<Action> actions = new ArrayList<>();
	private final List<Action> actionsImport = new ArrayList<>();

	@Inject
	@Optional
	private IProject project;

	@Inject
	private Shell shell;

	@Inject
	IEclipseContext eclipseContext;

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

	@PostConstruct
	void init() {
		actions.add(new Action(Messages.CompositePartEditor_AddPartSashContainer,
				createImageDescriptor(ResourceProvider.IMG_PartSashContainer)) {
			@Override
			public void run() {
				handleAddChild(BasicPackageImpl.Literals.PART_SASH_CONTAINER);
			}
		});
		actions.add(new Action(Messages.CompositePartEditor_AddPartStack,
				createImageDescriptor(ResourceProvider.IMG_PartStack)) {
			@Override
			public void run() {
				handleAddChild(BasicPackageImpl.Literals.PART_STACK);
			}
		});
		actions.add(new Action(Messages.CompositePartEditor_AddPart, createImageDescriptor(ResourceProvider.IMG_Part)) {
			@Override
			public void run() {
				handleAddChild(BasicPackageImpl.Literals.PART);
			}
		});

		actions.add(new Action(Messages.CompositePartEditor_AddArea, createImageDescriptor(ResourceProvider.IMG_Area)) {
			@Override
			public void run() {
				handleAddChild(AdvancedPackageImpl.Literals.AREA);
			}
		});
		actions.add(new Action(Messages.CompositePartEditor_AddPlaceholder,
				createImageDescriptor(ResourceProvider.IMG_Placeholder)) {
			@Override
			public void run() {
				handleAddChild(AdvancedPackageImpl.Literals.PLACEHOLDER);
			}
		});
		for (final FeatureClass c : getEditor().getFeatureClasses(BasicPackageImpl.Literals.PART_STACK,
				UiPackageImpl.Literals.ELEMENT_CONTAINER__CHILDREN)) {
			final EClass ec = c.eClass;
			actions.add(new Action(c.label, createImageDescriptor(c.iconId)) {
				@Override
				public void run() {
					handleAddChild(ec);
				}
			});
		}

		// --- Import Actions ---
		actionsImport.add(new Action("Views", createImageDescriptor(ResourceProvider.IMG_Part)) { //$NON-NLS-1$
			@Override
			public void run() {
				handleImportChild(BasicPackageImpl.Literals.PART, RegistryUtil.HINT_VIEW);
			}
		});
		actionsImport.add(new Action("Editors", createImageDescriptor(ResourceProvider.IMG_Part)) { //$NON-NLS-1$
			@Override
			public void run() {
				handleImportChild(BasicPackageImpl.Literals.PART, RegistryUtil.HINT_EDITOR);
			}
		});

	}

	@Override
	public Image getImage(Object element) {
		final boolean horizontal = ((MCompositePart) element).isHorizontal();

		return horizontal ? getImage(element, ResourceProvider.IMG_PartSashContainer)
				: getImage(element, ResourceProvider.IMG_PartSashContainer_vertical);

	}

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

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

	@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((MCompositePart) object);
		return composite;
	}

	private Composite createForm(Composite parent, final EMFDataBindingContext context,
			WritableValue<MCompositePart> 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());

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

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

		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.ModelTooling_UIElement_AccessibilityPhrase, getMaster(),
				context, textProp, E4Properties.accessibilityPhrase(getEditingDomain()));
		ControlFactory.createTextField(parent, Messages.CompositePartEditor_LabelLabel, master, context, textProp,
				E4Properties.label(getEditingDomain()));
		ControlFactory.createTextField(parent, Messages.CompositePartEditor_Tooltip, master, context, textProp,
				E4Properties.tooltip(getEditingDomain()));

		// ------------------------------------------------------------
		{
			final Label l = new Label(parent, SWT.NONE);
			l.setText(Messages.CompositePartEditor_IconURI);
			l.setLayoutData(new GridData());
			l.setToolTipText(Messages.CompositePartEditor_IconURI_Tooltip);

			final Text t = new Text(parent, SWT.BORDER);
			TextPasteHandler.createFor(t);
			t.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
			context.bindValue(textProp.observeDelayed(200, t),
					E4Properties.iconUri(getEditingDomain()).observeDetail(master));

			new ImageTooltip(t, Messages, this);

			Button b = ControlFactory.createFindButton(parent, resourcePool);
			b.addSelectionListener(new SelectionAdapter() {
				@Override
				public void widgetSelected(SelectionEvent e) {
					final PartIconDialogEditor dialog = new PartIconDialogEditor(b.getShell(), eclipseContext, project,
							getEditingDomain(), getMaster().getValue(), Messages);
					dialog.open();
				}
			});
		}

		// ------------------------------------------------------------
		{
			final Label l = new Label(parent, SWT.NONE);
			l.setText(Messages.CompositePartEditor_Orientation);
			l.setLayoutData(new GridData());

			final ComboViewer viewer = new ComboViewer(parent);
			final GridData gd = new GridData(GridData.FILL_HORIZONTAL);
			gd.horizontalSpan = 2;
			viewer.getControl().setLayoutData(gd);
			viewer.setContentProvider(new ArrayContentProvider());
			viewer.setLabelProvider(new LabelProvider() {
				@Override
				public String getText(Object element) {
					return ((Boolean) element).booleanValue() ? Messages.CompositePartEditor_Horizontal
							: Messages.CompositePartEditor_Vertical;
				}
			});
			viewer.setInput(new Boolean[] { Boolean.TRUE, Boolean.FALSE });
			final IViewerValueProperty<ComboViewer, Boolean> vProp = ViewerProperties.singleSelection(Boolean.class);
			context.bindValue(vProp.observe(viewer),
					E4Properties.horizontal(getEditingDomain()).observeDetail(getMaster()));
		}

		ControlFactory.createSelectedElement(parent, this, context, Messages.CompositePartEditor_SelectedElement);
		ControlFactory.createTextField(parent, Messages.CompositePartEditor_ContainerData, master, context, textProp,
				E4Properties.containerData(getEditingDomain()));

		{

			final Label l = new Label(parent, SWT.NONE);
			l.setText(Messages.CompositePartEditor_Controls);
			l.setLayoutData(new GridData(GridData.BEGINNING, GridData.BEGINNING, false, false));

			final Composite buttonCompTop = new Composite(parent, SWT.NONE);
			final GridData span2 = new GridData(GridData.FILL, GridData.BEGINNING, false, false, 2, 1);
			buttonCompTop.setLayoutData(span2);
			final GridLayout gl = new GridLayout(2, false);
			gl.marginLeft = 0;
			gl.marginRight = 0;
			gl.marginWidth = 0;
			gl.marginHeight = 0;
			buttonCompTop.setLayout(gl);

			final ComboViewer childrenDropDown = new ComboViewer(buttonCompTop);
			childrenDropDown.setLabelProvider(new FeatureClassLabelProvider(getEditor()));
			childrenDropDown.setContentProvider(ArrayContentProvider.getInstance());

			final List<FeatureClass> eClassList = new ArrayList<>();
			eClassList.add(new FeatureClass("PartSashContainer", BasicPackageImpl.Literals.PART_SASH_CONTAINER)); //$NON-NLS-1$
			eClassList.add(new FeatureClass("PartStack", BasicPackageImpl.Literals.PART_STACK)); //$NON-NLS-1$
			eClassList.add(new FeatureClass("Part", BasicPackageImpl.Literals.PART)); //$NON-NLS-1$
			eClassList.add(new FeatureClass("Area", AdvancedPackageImpl.Literals.AREA)); //$NON-NLS-1$
			eClassList.add(new FeatureClass("Placeholder", AdvancedPackageImpl.Literals.PLACEHOLDER)); //$NON-NLS-1$
			eClassList.addAll(getEditor().getFeatureClasses(BasicPackageImpl.Literals.COMPOSITE_PART,
					UiPackageImpl.Literals.ELEMENT_CONTAINER__CHILDREN));
			childrenDropDown.setInput(eClassList);
			childrenDropDown.setSelection(new StructuredSelection(eClassList.get(0)));

			Button b = new Button(buttonCompTop, SWT.PUSH | SWT.FLAT);
			b.setText(org.eclipse.e4.tools.emf.ui.internal.Messages.ModelTooling_Common_AddEllipsis);
			b.setImage(createImage(ResourceProvider.IMG_Obj16_table_add));
			b.setLayoutData(new GridData(GridData.FILL, GridData.CENTER, false, false));
			b.addSelectionListener(new SelectionAdapter() {
				@Override
				public void widgetSelected(SelectionEvent e) {
					if (!childrenDropDown.getSelection().isEmpty()) {
						final EClass eClass = ((FeatureClass) ((IStructuredSelection) childrenDropDown.getSelection())
								.getFirstElement()).eClass;
						handleAddChild(eClass);
					}
				}
			});

			new Label(parent, SWT.NONE);

			final TableViewer viewer = new TableViewer(parent);
			final GridData gd = new GridData(GridData.FILL, GridData.FILL, true, true, 2, 1);
			viewer.getControl().setLayoutData(gd);
			viewer.setContentProvider(new ObservableListContentProvider<>());

			final FontDescriptor italicFontDescriptor = FontDescriptor.createFrom(viewer.getControl().getFont())
					.setStyle(SWT.ITALIC);
			viewer.setLabelProvider(new DelegatingStyledCellLabelProvider(
					new ComponentLabelProvider(getEditor(), Messages, italicFontDescriptor)));

			viewer.setInput(E4Properties.<MPartSashContainerElement>children().observeDetail(getMaster()));

			viewer.addOpenListener(event -> {
				if (event.getSelection() instanceof IStructuredSelection) {
					IStructuredSelection selection = (IStructuredSelection) event.getSelection();
					if (selection.getFirstElement() instanceof EObject && getEditor() != null) {
						EObject selected = (EObject) selection.getFirstElement();
						getEditor().gotoEObject(ModelEditor.TAB_FORM, selected);
					}
				}
			});

			new Label(parent, SWT.NONE);

			final Composite buttonCompBot = new Composite(parent, SWT.NONE);
			buttonCompBot.setLayoutData(new GridData(GridData.FILL, GridData.END, false, false, 2, 1));
			buttonCompBot.setLayout(new FillLayout());

			b = new Button(buttonCompBot, SWT.PUSH | SWT.FLAT);
			b.setText(org.eclipse.e4.tools.emf.ui.internal.Messages.ModelTooling_Common_Up);
			b.setImage(createImage(ResourceProvider.IMG_Obj16_arrow_up));
			b.addSelectionListener(new SelectionAdapter() {
				@Override
				public void widgetSelected(SelectionEvent e) {
					if (!viewer.getSelection().isEmpty()) {
						final IStructuredSelection s = (IStructuredSelection) viewer.getSelection();
						if (s.size() == 1) {
							final Object obj = s.getFirstElement();
							final int idx = getMaster().getValue().getChildren().indexOf(obj) - 1;
							if (idx >= 0) {
								if (Util.moveElementByIndex(getEditingDomain(), (MUIElement) obj, getEditor()
										.isLiveModel(), idx)) {
									viewer.setSelection(new StructuredSelection(obj));
								}
							}

						}
					}
				}
			});

			b = new Button(buttonCompBot, SWT.PUSH | SWT.FLAT);
			b.setText(org.eclipse.e4.tools.emf.ui.internal.Messages.ModelTooling_Common_Down);
			b.setImage(createImage(ResourceProvider.IMG_Obj16_arrow_down));
			b.addSelectionListener(new SelectionAdapter() {
				@Override
				public void widgetSelected(SelectionEvent e) {
					if (!viewer.getSelection().isEmpty()) {
						final IStructuredSelection s = (IStructuredSelection) viewer.getSelection();
						if (s.size() == 1) {
							final Object obj = s.getFirstElement();
							final int idx = getMaster().getValue().getChildren().indexOf(obj) + 1;
							if (idx < getMaster().getValue().getChildren().size()) {
								if (Util.moveElementByIndex(getEditingDomain(), (MUIElement) obj, getEditor()
										.isLiveModel(), idx)) {
									viewer.setSelection(new StructuredSelection(obj));
								}
							}

						}
					}
				}
			});

			b = new Button(buttonCompBot, SWT.PUSH | SWT.FLAT);
			b.setText(org.eclipse.e4.tools.emf.ui.internal.Messages.ModelTooling_Common_Remove);
			b.setImage(createImage(ResourceProvider.IMG_Obj16_table_delete));
			b.addSelectionListener(new SelectionAdapter() {
				@Override
				public void widgetSelected(SelectionEvent e) {
					if (!viewer.getSelection().isEmpty()) {
						final List<?> elements = ((IStructuredSelection) viewer.getSelection()).toList();

						final Command cmd = RemoveCommand.create(getEditingDomain(), getMaster().getValue(),
								UiPackageImpl.Literals.ELEMENT_CONTAINER__CHILDREN, elements);
						if (cmd.canExecute()) {
							getEditingDomain().getCommandStack().execute(cmd);
						}
					}
				}
			});
		}

		ControlFactory.createCheckBox(parent, Messages.ModelTooling_UIElement_ToBeRendered, getMaster(), context,
				WidgetProperties.buttonSelection(), E4Properties.toBeRendered(getEditingDomain()));
		ControlFactory.createCheckBox(parent, Messages.ModelTooling_UIElement_Visible, getMaster(), context,
				WidgetProperties.buttonSelection(), E4Properties.visible(getEditingDomain()));

		Composite propComposite = ControlFactory.createMapProperties(parent, Messages, this,
				Messages.ModelTooling_Context_Properties, UiPackageImpl.Literals.CONTEXT__PROPERTIES,
				VERTICAL_LIST_WIDGET_INDENT);
		propComposite.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).span(3, 1).create());

		Composite variablesComposite = ControlFactory.createStringListWidget(parent, Messages, this,
				Messages.ModelTooling_Context_Variables, UiPackageImpl.Literals.CONTEXT__VARIABLES,
				VERTICAL_LIST_WIDGET_INDENT);
		variablesComposite.setLayoutData(GridDataFactory.fillDefaults().grab(true, true).span(3, 1).create());

		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.CategoryEditor_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);

		if (project == null) {
			createUITreeInspection(folder);
		}

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

		folder.setSelection(0);

		return folder;
	}

	private void createUITreeInspection(CTabFolder folder) {
		final CTabItem item = new CTabItem(folder, SWT.NONE);
		item.setText(Messages.ModelTooling_Common_RuntimeWidgetTree);
		final Composite container = new Composite(folder, SWT.NONE);
		container.setLayout(new GridLayout());
		item.setControl(container);

		final UIViewer objectViewer = new UIViewer();
		final TreeViewer viewer = objectViewer.createViewer(container, UiPackageImpl.Literals.UI_ELEMENT__WIDGET,
				getMaster(), resourcePool, Messages);
		viewer.getControl().setLayoutData(new GridData(GridData.FILL_BOTH));
	}

	@Override
	public IObservableList<?> getChildList(Object element) {
		return E4Properties.<MPartSashContainerElement>children().observe((MCompositePart) element);
	}

	@Override
	public String getDetailLabel(Object element) {
		return null;
	}

	@Override
	public FeaturePath[] getLabelProperties() {
		return new FeaturePath[] { FeaturePath.fromList(UiPackageImpl.Literals.GENERIC_TILE__HORIZONTAL),
				FeaturePath.fromList(UiPackageImpl.Literals.UI_ELEMENT__TO_BE_RENDERED) };
	}

	protected void handleAddChild(EClass eClass) {
		final EObject eObject = EcoreUtil.create(eClass);
		addToModel(eObject);
	}

	private void addToModel(EObject eObject) {
		setElementId(eObject);

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

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

	protected void handleImportChild(EClass eClass, String hint) {

		if (eClass == BasicPackageImpl.Literals.PART) {
			final ModelImportWizard wizard = new ModelImportWizard(MPart.class, this, hint, resourcePool);
			final WizardDialog wizardDialog = new WizardDialog(shell, wizard);
			if (wizardDialog.open() == Window.OK) {
				final MPart[] parts = (MPart[]) wizard.getElements(MPart.class);
				for (final MPart part : parts) {
					addToModel((EObject) part);
				}
			}
		}
	}

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

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