/*******************************************************************************
 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
 * in Industry THTH ry.
 * 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:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.diagram.profile.view;

import java.util.Collection;

import org.simantics.browsing.ui.CheckedState;
import org.simantics.browsing.ui.model.check.CheckedStateRule;
import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.exception.DatabaseException;
import org.simantics.diagram.stubs.DiagramResource;
import org.simantics.scenegraph.profile.ProfileUtils;
import org.simantics.scenegraph.profile.request.ProfileActiveEntryResources;
import org.simantics.scenegraph.profile.request.ProfileEntryResources;

public class ProfileCheckContributor implements CheckedStateRule {

    @Override
    public boolean isCompatible(Class<?> contentType) {
        return contentType.equals(ProfileTuple.class);
    }

    @Override
    public CheckedState getCheckedState(ReadGraph graph, Object parent)
            throws DatabaseException {

        ProfileTuple tuple = (ProfileTuple)parent;
        Resource activeProfile = tuple.getBaseProfile();
        Resource entry = tuple.getEntry();
        DiagramResource DIA = DiagramResource.getInstance(graph);

        if(graph.isInstanceOf(entry, DIA.Profile)) {
            Resource list = graph.getPossibleObject(entry, DIA.HasEntries);
            Collection<Resource> activeEntries = graph.syncRequest( new ProfileActiveEntryResources(activeProfile, list) );
            if (activeEntries.isEmpty()) {
                return CheckedState.NOT_CHECKED;
            } else {
                Collection<Resource> entries = graph.syncRequest( new ProfileEntryResources(activeProfile, list) );
                return entries.equals(activeEntries) ? CheckedState.CHECKED : CheckedState.GRAYED;
            }
        }

        if(ProfileUtils.isActive(graph, tuple.getRuntimeDiagram(), activeProfile, entry)) return CheckedState.CHECKED;

        return CheckedState.NOT_CHECKED;

    }

}