//------------------------------------------------------------------------------
// Copyright (c) 2005, 2007 IBM Corporation and others.
// 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:
// IBM Corporation - initial implementation
//------------------------------------------------------------------------------
/**
 * 
 */
package org.eclipse.epf.diagramming.base.parts;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.emf.transaction.impl.InternalTransactionalEditingDomain;
import org.eclipse.epf.diagram.core.bridge.ActivityDiagramAdapter;
import org.eclipse.epf.diagram.core.part.DiagramEditorInput;
import org.eclipse.epf.diagram.core.part.DiagramFileEditorInputProxy;
import org.eclipse.epf.diagramming.base.persistence.DiagramFileCreatorEx;
import org.eclipse.epf.diagramming.base.persistence.DiagramPersister;
import org.eclipse.epf.diagramming.base.persistence.DiagramService;
import org.eclipse.epf.diagramming.base.persistence.IDiagramService;
import org.eclipse.epf.library.edit.process.BreakdownElementWrapperItemProvider;
import org.eclipse.epf.uma.Activity;
import org.eclipse.epf.uma.MethodElement;
import org.eclipse.gef.commands.Command;
import org.eclipse.gmf.runtime.common.core.command.ICommand;
import org.eclipse.gmf.runtime.diagram.ui.commands.ICommandProxy;
import org.eclipse.gmf.runtime.diagram.ui.editparts.DiagramEditPart;
import org.eclipse.gmf.runtime.diagram.ui.parts.IDiagramWorkbenchPart;
import org.eclipse.gmf.runtime.notation.Diagram;
import org.eclipse.ui.IEditorDescriptor;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.ide.IDE;

/**
 * Diagrm helper class (replacing the DiagramEditorUtil).
 * @author Shashidhar Kannoori
 *
 */
public final class DiagramHelper {

	/**
	 * To open a diagram and create a file.
	 * @written
	 */
	public static void openDiagramEditor(IWorkbenchPage page, IEditorInput input, String diagramKind){
		
		IProgressMonitor monitor = new NullProgressMonitor();
		
		MethodElement methodElement = (MethodElement)((DiagramEditorInput)input).getMethodElement();
		Diagram diagram = IDiagramService.eInstance.getDiagram((Activity)methodElement, diagramKind, false, new NullProgressMonitor());
		IFile diagramFile = DiagramPersister.getFile(input) ;
		if(diagramFile == null){
			diagramFile = DiagramPersister.createNewDiagramFile(DiagramFileCreatorEx.getInstance(), 
					input, page.getWorkbenchWindow().getShell(), 
					monitor);
		}
		if(diagram == null){
			diagram = IDiagramService.eInstance.createDiagram((Activity)methodElement, diagramKind, false);
			//TODO: remove this save option
			try{
				DiagramPersister.saveDiagram(IDiagramService.eInstance.createEditingDomain(), 
					diagramFile, diagram, false);
			}catch(Exception e){
				e.printStackTrace();
			}
		}
		
		
		DiagramFileEditorInputProxy diagramFileEditorInput = new DiagramFileEditorInputProxy(
				diagramFile, (DiagramEditorInput)input, null);
		
		if (diagramFile != null) {
			DiagramEditPart editPart = openEditor(diagramFileEditorInput, page, monitor, true, true);
			initialize((Diagram) editPart.getModel(), diagramFileEditorInput);
		}
		
	}
	
	private static final DiagramEditPart openEditor(IFileEditorInput input,
			IWorkbenchPage page,IProgressMonitor progressMonitor, boolean activate, 
			boolean determineContentType){
		IEditorPart editorPart = null;
		try {
			//IWorkbenchPage page = dWindow.getActivePage();
			IEditorPart parent = page.getActiveEditor();
			if (page != null) {
				 //sanity checks
		        if (page == null) {
					throw new IllegalArgumentException();
				}

		        // open the editor on the file
		        IEditorDescriptor editorDesc = IDE.getEditorDescriptor(input.getFile(), determineContentType);
		        editorPart =  page.openEditor(input, editorDesc.getId(),
		                activate);
				if(editorPart != null && parent != null){
					// set the parent.
				}
			}
			input.getFile().refreshLocal(IResource.DEPTH_ZERO, null);
			return ((IDiagramWorkbenchPart) editorPart).getDiagramEditPart();
		} catch (Exception e) {
			e.printStackTrace();
		}

		return null;
	}
	
	public static String getActivityDiagramKind(){
		return DiagramService.AD_kind;
	}
	/**
	 * 
	 * @param model
	 * @param diagramFileEditorInput
	 */
	private static void initialize(Diagram model, DiagramFileEditorInputProxy diagramFileEditorInput) {
		BreakdownElementWrapperItemProvider wrapper = diagramFileEditorInput.getDiagramEditorInput().getWrapper();
		ActivityDiagramAdapter adapter = wrapper != null ?
				new ActivityDiagramAdapter(wrapper) : 
					new ActivityDiagramAdapter((Activity)diagramFileEditorInput.getDiagramEditorInput().getMethodElement());
		adapter.setEditingDomain((InternalTransactionalEditingDomain) diagramFileEditorInput.getEditingDomain());
		adapter.setSuppression(diagramFileEditorInput.getDiagramEditorInput().getSuppression());
		model.getElement().eAdapters().add(adapter);
		adapter.populateDiagram();
	}
	
	/**
	 * @generated
	 */
	public static Command getCommandWrapper(ICommand cmd) {
		return new ICommandProxy(cmd);
	}
}