/**
 * 
 */
package org.eclipse.epf.authoring.gef.viewer;

import java.util.Iterator;
import java.util.List;

import org.eclipse.draw2d.ColorConstants;
import org.eclipse.draw2d.DelegatingLayout;
import org.eclipse.draw2d.FreeformLayer;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.LayeredPane;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.emf.ecore.EModelElement;
import org.eclipse.epf.authoring.gef.figures.SelectableLabel;
import org.eclipse.epf.diagram.core.bridge.BridgeHelper;
import org.eclipse.epf.diagram.core.services.DiagramManager;
import org.eclipse.epf.diagram.model.LinkedObject;
import org.eclipse.epf.diagram.model.NamedNode;
import org.eclipse.epf.diagram.model.Node;
import org.eclipse.epf.diagram.model.NodeContainer;
import org.eclipse.epf.diagramming.edit.parts.UMLEditPartFactory;
import org.eclipse.epf.library.edit.IFilter;
import org.eclipse.epf.library.edit.util.Suppression;
import org.eclipse.epf.library.edit.util.TngUtil;
import org.eclipse.epf.library.layout.diagram.DiagramInfo;
import org.eclipse.epf.library.util.ResourceHelper;
import org.eclipse.epf.uma.Activity;
import org.eclipse.epf.uma.DiagramElement;
import org.eclipse.epf.uma.MethodElement;
import org.eclipse.epf.uma.VariabilityElement;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.EditPartFactory;
import org.eclipse.gef.GraphicalEditPart;
import org.eclipse.gef.LayerConstants;
import org.eclipse.gmf.runtime.diagram.ui.editparts.DiagramRootEditPart;
import org.eclipse.gmf.runtime.diagram.ui.editparts.ShapeNodeEditPart;
import org.eclipse.gmf.runtime.diagram.ui.image.ImageFileFormat;
import org.eclipse.gmf.runtime.diagram.ui.parts.DiagramGraphicalViewer;
import org.eclipse.gmf.runtime.diagram.ui.render.util.CopyToImageUtil;
import org.eclipse.gmf.runtime.diagram.ui.services.editpart.EditPartService;
import org.eclipse.gmf.runtime.draw2d.ui.figures.WrapLabel;
import org.eclipse.gmf.runtime.notation.Diagram;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.swt.widgets.Composite;

/**
 * 
 * @author Shashidhar Kannoori
 */
public abstract class NewAbstractDiagramGraphicalViewer extends
		AbstractDiagramGraphicalViewer {

	protected GraphicalEditPart part = null;
	protected Diagram diagram;

	public NewAbstractDiagramGraphicalViewer(Composite parent, Object wrapper) {
		super(parent, wrapper);
		// TODO Auto-generated constructor stub
	}

	/**
	 * Creates diagram for given object (only for {@link Activity} and packs the bounds.
	 * 
	 * @param wrapper 	{@link Object} 	
	 * @param needReset boolean
	 * @param filter 	{@link IFilter}
	 * @param sup		{@link Suppression}
	 */
	public EditPart loadDiagram(Object wrapper, boolean needReset,
			IFilter filter, Suppression sup) {
		// initialize the viewer with the edit part
		EditPart editPart = createEditPart(wrapper, filter, sup);
		this.graphicalViewer.setContents(editPart);

		// ask for immediate update of the control so that the diagram figure
		// will be computed
		parent.pack(true);

		// This check is needed for browsing, in order to render activity contributing's
		// children.  In processAuthoring we don't do realization, in order to displayed 
		// realized elements, we have to cleanup ADD diagram and recreate. needtoReset or cleanupdiagram.
		// Only for activity detail diagram.
		Object o = TngUtil.unwrap(wrapper);
		if(o instanceof VariabilityElement && getDiagramType() != null && 
				getDiagramType().equalsIgnoreCase(ResourceHelper.DIAGRAM_TYPE_ACTIVITY_DETAIL)){
			if(TngUtil.hasContributor((VariabilityElement)o)){
				needReset = true;
			}
		}
		
		if (needReset) {
			cleanUpDiagram();
		}

		return editPart;
	}

	
	/**
	 * returns {@link DiagramInfo}
	 * 
	 */
	public DiagramInfo getDiagramInfo() {
		DiagramInfo diagramInfo = null;

		Object element = part.getModel();
		if (element instanceof LinkedObject) {
			element = ((LinkedObject) element).getObject();
		}
		if(element instanceof View){
			 element = ((View)element).getElement();
			if(element != null && element instanceof EModelElement){
				element = BridgeHelper.getMethodElement((EModelElement)element);
			}
			if(element instanceof Node){
				element = ((Node)element).getLinkedElement();
			}
		}

		if (element instanceof MethodElement) {
			diagramInfo = new DiagramInfo(getDiagramType(),
					(MethodElement) element);
			loadDiagramInfo(part, diagramInfo);
		}

		return diagramInfo;
	}
	
	public void createDiagramImage(ImageFileFormat imageFileFormat){
		CopyToImageUtil im = new CopyToImageUtil();
		//im.copyToImage(part, destination, format, monitor)
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.epf.authoring.gef.viewer.AbstractDiagramGraphicalViewer#createEditPartFactory()
	 */
	@Override
	protected EditPartFactory createEditPartFactory() {
		return EditPartService.getInstance();
	}
	
	/**
	 * 
	 */
	protected void configureGraphicalViewer() {
		getGraphicalViewer().getControl().setBackground(
				ColorConstants.listBackground);
		DiagramGraphicalViewer viewer = (DiagramGraphicalViewer) getGraphicalViewer();

		DiagramRootEditPart root = (DiagramRootEditPart) EditPartService
				.getInstance().createRootEditPart(getDiagram());
		LayeredPane printableLayers = (LayeredPane) root
				.getLayer(LayerConstants.PRINTABLE_LAYERS);
		FreeformLayer extLabelsLayer = new FreeformLayer();
		extLabelsLayer.setLayoutManager(new DelegatingLayout());
		printableLayers.addLayerAfter(extLabelsLayer,
				UMLEditPartFactory.EXTERNAL_NODE_LABELS_LAYER,
				LayerConstants.PRIMARY_LAYER);
		LayeredPane scalableLayers = (LayeredPane) root
				.getLayer(LayerConstants.SCALABLE_LAYERS);
		FreeformLayer scaledFeedbackLayer = new FreeformLayer();
		scaledFeedbackLayer.setEnabled(false);
		scalableLayers.addLayerAfter(scaledFeedbackLayer,
				LayerConstants.SCALED_FEEDBACK_LAYER,
				DiagramRootEditPart.DECORATION_UNPRINTABLE_LAYER);
		viewer.setRootEditPart(root);
		viewer.setEditPartFactory(createEditPartFactory());
	}
	
	/*
	 * 
	 */
	protected Diagram getDiagram(){
		try{
			if(diagram == null){
				Object o = TngUtil.unwrap(wrapper);
				if (o instanceof Activity) {
					Activity act = (Activity) o;
					DiagramManager dmgr = DiagramManager.getInstance(TngUtil
							.getOwningProcess(act));
					List list = dmgr.getDiagrams(act, ActivityDiagramService
							.getIntType(getDiagramType()));
					if (!list.isEmpty()) {
						diagram = (Diagram) list.get(0);
					} else {
						System.out.println("Diagram is empty for " + act);
					}
				}
			}
			return diagram;
		}catch(Exception e){
			e.printStackTrace();
			return null;
		}
	}
	
	@Override
	protected void createGraphicalViewer() {
		this.graphicalViewer = new DiagramGraphicalViewer();
		this.graphicalViewer.createControl(parent);
		configureGraphicalViewer();
	}
	
	protected void loadDiagramInfo(GraphicalEditPart part, DiagramInfo diagramInfo) {
		List children = part.getChildren();
		for (Iterator it = children.iterator(); it.hasNext();) {
			Object o = it.next();
			
			if (o instanceof GraphicalEditPart) {
				part = (GraphicalEditPart) o;
				Object model = part.getModel();
				Object e = model;
				if (e instanceof LinkedObject) {
					e = ((LinkedObject) e).getObject();
				}
				if(e instanceof View){
					e = ((View)e).getElement();
					if(e instanceof Node){
						if(e instanceof NodeContainer){
							loadDiagramInfo((GraphicalEditPart)o, diagramInfo);
						}
						e = ((Node)e).getLinkedElement();
					}
					if(e != null && e instanceof EModelElement){
						e = BridgeHelper.getMethodElement((EModelElement)e);
					}
				}

				if (e instanceof DiagramElement) {
					continue;
				}

				if (e instanceof MethodElement) {
					boolean suppressed;
					if (model instanceof NamedNode) {
						suppressed = ((NamedNode) model).isSuppressed();
					} else {
						suppressed = ((MethodElement) e).getSuppressed()
								.booleanValue();
					}

						IFigure f = part.getFigure();
						Rectangle bounds = f.getBounds();

						String altTag = null;
						if (f instanceof WrapLabel) {
							altTag = ((WrapLabel) f).getText();
						}
						diagramInfo.addArea((MethodElement) e, bounds.x,
							bounds.y, bounds.width, bounds.height, altTag, suppressed);

				}
			} else {
			}
		}
	}
}