/*-
 * #%L
 * This file is part of "Apromore Community".
 * 
 * Copyright (C) 2015 - 2017 Queensland University of Technology.
 * %%
 * Copyright (C) 2018 - 2020 Apromore Pty Ltd.
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Lesser Public License for more details.
 * 
 * You should have received a copy of the GNU General Lesser Public
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/lgpl-3.0.html>.
 * #L%
 */
package de.hbrs.oryx.yawl.converter.handler.yawl.flow;

import java.util.HashMap;

import org.oryxeditor.server.diagram.basic.BasicEdge;
import org.oryxeditor.server.diagram.basic.BasicShape;
import org.yawlfoundation.yawl.elements.YFlow;

import de.hbrs.oryx.yawl.converter.context.YAWLConversionContext;
import de.hbrs.oryx.yawl.converter.handler.yawl.YAWLHandlerImpl;
import de.hbrs.oryx.yawl.converter.layout.FlowLayout;
import de.hbrs.oryx.yawl.util.OryxUUID;
import de.hbrs.oryx.yawl.util.YAWLUtils;

/**
 * Converts the YAWL flows to Oryx edges
 * 
 * @author Felix Mannhardt (Bonn-Rhein-Sieg University of Applied Sciences)
 * 
 */
public class FlowHandler extends YAWLHandlerImpl {

    private final YFlow flow;

    public FlowHandler(final YAWLConversionContext context, final YFlow flow) {
        super(context);
        this.flow = flow;
    }

    @Override
    public void convert(final String parentId) {
        if (YAWLUtils.isElementVisible(flow.getPriorElement()) && YAWLUtils.isElementVisible(flow.getNextElement())) {
            // Both elements are visible
            // -> draw a edge between them
            String priorElementID = flow.getPriorElement().getID();
            String nextElementID = flow.getNextElement().getID();
            getContext().getNet(parentId).addChildShape(convertFlow(parentId, priorElementID, nextElementID));
        } else if (YAWLUtils.isElementVisible(flow.getPriorElement()) && !YAWLUtils.isElementVisible(flow.getNextElement())) {
            // The next element is invisible (e.g. implicit condition)
            // -> draw a edge to the next element
            String priorElementID = flow.getPriorElement().getID();
            String nextElementID = YAWLUtils.getNextVisibleElement(flow).getID();
            getContext().getNet(parentId).addChildShape(convertFlow(parentId, priorElementID, nextElementID));
        }
    }

    private BasicShape convertFlow(final String netId, final String priorElementID, final String nextElementID) {

        // YAWL flows do not have an ID
        String generatedId = OryxUUID.generate();
        BasicEdge flowShape = new BasicEdge(generatedId, "Flow");

        BasicShape priorShape = getContext().getShape(priorElementID);
        BasicShape nextShape = getContext().getShape(nextElementID);

        // Incomings and Outgoings are automatically configured in Signavio
        flowShape.connectToASource(priorShape);
        flowShape.connectToATarget(nextShape);

        FlowLayout flowLayout = getContext().getFlowLayout(netId, priorElementID, nextElementID);
        if (flowLayout != null) {
            flowShape.setBounds(flowLayout.getBounds());
            flowShape.setDockers(flowLayout.getDockers());
            HashMap<String, String> props = new HashMap<String, String>();
            props.put("yawlid", priorElementID + "|-|" + nextElementID);
            props.put("name", flowLayout.getLabel());
            props.put("linestyle", String.valueOf(flowLayout.getLineStyle()));
            flowShape.setProperties(props);
            // TODO add label settings
            // flowShape.addLabelSetting(newSetting);
        } else {
            // Set Default Values
            // TODO guess defaults
        }

        return flowShape;
    }

}
