/**
 *                                                                            
 *  Copyright (c) 2011, 2016 - Loetz GmbH&Co.KG (69115 Heidelberg, Germany) 
 *                                                                            
 *  All rights reserved. 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:                                                      
 * 	   Christophe Loetz (Loetz GmbH&Co.KG) - initial implementation
 * 
 */
 package org.eclipse.osbp.utils.vaadin.bpmn;

import org.eclipse.e4.core.contexts.IEclipseContext;
import org.eclipse.osbp.bpm.api.IBPMEngine;
import org.eclipse.osbp.bpm.api.IBlipBPMFunctionProvider;
import org.slf4j.Logger;

import com.vaadin.server.ClientConnector;
import com.vaadin.server.Page;
import com.vaadin.ui.UI;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.Window;

@SuppressWarnings("all")
public class BpmnWindow extends Window implements ClientConnector.DetachListener {
	private static Logger log = org.slf4j.LoggerFactory
			.getLogger(BpmnWindow.class);

	private boolean isAttached = false;
	private BpmnRenderer bpmnRenderer;
	private float width = 820;
	private float height = 650;
	private VerticalLayout inner;
	
	public BpmnWindow(IBPMEngine bpmEngine, IBlipBPMFunctionProvider blip, IEclipseContext context) {
		super();
		setClosable(true);
		setModal(false);
		inner = new VerticalLayout();
		inner.setMargin(false);
		inner.setSizeFull();
		setContent(inner);
		inner.setPrimaryStyleName("osbp");
		addDetachListener(this);
		bpmnRenderer = new BpmnRenderer(bpmEngine, blip, context);
		inner.addComponent(bpmnRenderer);
	}

	public void showBpmn(String processId) {
		if(!isAttached) {
			UI.getCurrent().addWindow(this);
			isAttached = true;
		}
		UI.getCurrent().access(new Runnable() {
			@Override
			public void run() {
				setPosition(Page.getCurrent().getBrowserWindowWidth()-(int)width, Page.getCurrent().getBrowserWindowHeight()-(int)height);
				inner.setHeight(height, Unit.PIXELS);
				inner.setWidth(width, Unit.PIXELS);
				if ( !bpmnRenderer.drawBpmn(processId) ) {
					closeBpmn();
				}
			}
		});
	}
	
	public void closeBpmn() {
		if(isAttached) {
			bpmnRenderer.dispose();
			UI.getCurrent().removeWindow(this);
		}
	}
	
	@Override
	public void detach(DetachEvent event) {
		bpmnRenderer.dispose();
		isAttached = false;
	}
	
	public void selectTask(String taskName) {
		bpmnRenderer.setSelectedCell(taskName);		
	}

}