/*******************************************************************************
 * 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.db.layer0.request;

import org.simantics.databoard.Bindings;
import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.common.ResourceArray;
import org.simantics.db.common.exception.DebugException;
import org.simantics.db.common.request.TernaryRead;
import org.simantics.db.exception.AdaptionException;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.exception.ResourceNotFoundException;
import org.simantics.db.layer0.exception.MissingVariableException;
import org.simantics.db.layer0.variable.Variable;
import org.simantics.db.layer0.variable.VariableInterface;
import org.simantics.layer0.Layer0;
import org.simantics.scl.reflection.OntologyVersions;
import org.simantics.simulation.ontology.SimulationResource;

public class PossibleSessionVariableFromURI extends TernaryRead<ResourceArray, String, String, Variable> {

    public PossibleSessionVariableFromURI(ResourceArray resource, String identifier, String sessionId) {
        super(resource, identifier, sessionId);
    }

    @Override
    public Variable perform(ReadGraph graph) throws DatabaseException {

        try {
        	
        	String uri = OntologyVersions.getInstance().currentVersion("http://www.simantics.org/Modeling-0.0/CompositeToDiagram");
            Resource map = graph.getResource(uri);

            Resource tail = parameter.tail();
            Resource head = parameter.head();

            if(!graph.hasStatement(tail)) return null;

            Layer0 l0 = Layer0.getInstance(graph);

            String valuationName = null;

            Resource diagram = graph.syncRequest(new PossibleDiagram(tail));
            if(diagram == null) {
                Resource d = diagram;
                while((d = graph.getPossibleObject(d, l0.PartOf)) != null) {
                    diagram = graph.getPossibleObject(d, map);
                    if(diagram != null) break;
                }
            }

            if(diagram != null) {
                SimulationResource SIMU = SimulationResource.getInstance(graph);
                for(Resource run : graph.getObjects(diagram, l0.ConsistsOf)) {
                    String name = graph.getPossibleRelatedValue(run, l0.HasName, Bindings.STRING);
                    if(parameter2.equals(name)) {
                        valuationName = graph.getPossibleRelatedValue(run, SIMU.HasActiveExperiment);
                        break;
                    }
                }
            }

            Resource model = graph.syncRequest(new PossibleModel(head));
            if (model == null) return null;
            if (valuationName == null) {
                valuationName = "/ConfigurationValues";
            }

            VariableInterface variableInterface = graph.adapt(model, VariableInterface.class);
            Variable modelVariable = graph.adapt(model, Variable.class);
            Variable experimentVariable = modelVariable.browse(graph, valuationName+parameter2);
            return variableInterface.getVariable(graph, experimentVariable, parameter3);
        } catch (MissingVariableException e) {
            if (DebugException.DEBUG)
                e.printStackTrace();
            return null;
        } catch (ResourceNotFoundException e) {
            if (DebugException.DEBUG)
                e.printStackTrace();
            return null;
        } catch (AdaptionException e) {
            if (DebugException.DEBUG)
                e.printStackTrace();
            return null;
        } catch (Throwable e) {
            if (DebugException.DEBUG)
                e.printStackTrace();
            return null;
        }
    }
}