package org.eclipse.emf.refactor.smells.xtext.handler;

import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.IHandler;
import org.eclipse.core.commands.IHandlerListener;
import org.eclipse.core.resources.IProject;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.refactor.smells.runtime.managers.RuntimeManager;
import org.eclipse.emf.refactor.smells.xtext.managers.XtextProjectManager;
import org.eclipse.emf.refactor.smells.xtext.managers.XtextSelectionManager;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Cursor;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.PlatformUI;

public class FindModelSmellHandler implements IHandler {
	
	private Shell shell;
	private EObject selectedEObject;
	private IProject selectedProject;

	@Override
	public void addHandlerListener(IHandlerListener handlerListener) {	}

	@Override
	public void dispose() {	}

	@SuppressWarnings("finally")
	@Override
	public Object execute(ExecutionEvent event) throws ExecutionException {
		Cursor oldCursor = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell().getCursor();
		shell = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell();
		shell.setCursor(new Cursor(null,SWT.CURSOR_WAIT));
		ISelection selection = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getSelectionService().getSelection();
//		PapyrusManager.setComponents(PapyrusSelectionManager.getObject(selection));
		selectedProject = XtextProjectManager.getActualProject(selection);
		selectedEObject = XtextSelectionManager.getRoot(selection);
		if (selectedEObject == null) {	
			MessageDialog.openError(
					shell,
					"EMF Quality Assurance: Error when trying to execute smell search",
					"No selected EMF model element!");
			PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell().setCursor(oldCursor);
			return null;
		}
		try {
			RuntimeManager.findConfiguredModelSmells(selectedProject, selectedEObject, null);
		} catch (Exception ex) {
			Throwable cause = ex.getCause();
			if(!(cause == null) && cause.getClass().getName().equals("org.eclipse.emf.ecore.xmi.PackageNotFoundException")){
				MessageDialog.openError(
						shell,
						"EMF Quality Assurance: Error when trying to open File",
						"The file you selected is not a (valid) EMF model.");
			} else {
			MessageDialog.openError(
					shell,
					"EMF Quality Assurance: Error when trying to execute smell search", 
					ex.toString());
			ex.printStackTrace();
			}
		} finally {
			PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell().setCursor(oldCursor);
			return null;
		}
	}

	@Override
	public boolean isEnabled() {
		return true;
	}

	@Override
	public boolean isHandled() {
		return true;
	}

	@Override
	public void removeHandlerListener(IHandlerListener handlerListener) {  }

}