package org.simantics.district.network.profile;

import org.simantics.databoard.Bindings;
import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.common.request.ResourceRead;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.layer0.variable.Variable;
import org.simantics.db.layer0.variable.Variables;
import org.simantics.diagram.stubs.DiagramResource;
import org.simantics.district.network.ontology.DistrictNetworkResource;
import org.simantics.scl.runtime.function.Function1;

/**
 * @author Tuukka Lehtonen
 */
public class DiagramSettingsRequest extends ResourceRead<DiagramSettings> {

	public DiagramSettingsRequest(Resource runtimeDiagram) {
		super(runtimeDiagram);
	}

	@SuppressWarnings("unchecked")
    @Override
	public DiagramSettings perform(ReadGraph graph) throws DatabaseException {
		DiagramResource DIA = DiagramResource.getInstance(graph);
		DistrictNetworkResource DN = DistrictNetworkResource.getInstance(graph);

		Function1<Resource, Double> arrowLengthProperty = null;
		double arrowLengthGain = 1;
		double arrowLengthBias = 0;

		Resource diagram = graph.getPossibleObject(resource, DIA.RuntimeDiagram_HasConfiguration);
		if (diagram != null) {
			Variable dv = Variables.getPossibleVariable(graph, diagram);

			Resource alp = graph.getPossibleObject(diagram, DN.Diagram_arrowLengthProperty);
			//System.out.println("alp: " + NameUtils.getURIOrSafeNameInternal(graph, alp));
			if (alp != null) {
				Variable alpv = Variables.getPossibleVariable(graph, alp);
				if (alpv != null) {
					//System.out.println("alpv: " + alpv.getURI(graph));
					arrowLengthProperty = alpv.getPropertyValue(graph, DN.Edge_ArrowLengthProperty_value);
				}

				arrowLengthGain =
						safeDoubleProperty(graph, alp, DN.Edge_ArrowLengthProperty_gain, 1)
						* safeDoubleProperty(graph, diagram, DN.Diagram_arrowLengthGain, 1);
				arrowLengthBias =
						safeDoubleProperty(graph, alp, DN.Edge_ArrowLengthProperty_bias, 0)
						+ safeDoubleProperty(graph, diagram, DN.Diagram_arrowLengthBias, 0);
			}

		}

		DiagramSettings ds = new DiagramSettings( arrowLengthProperty, arrowLengthGain, arrowLengthBias);
		//System.out.println("new diagram settings: " + ds);
		return ds;
	}

	private static float safeFloatProperty(ReadGraph graph, Resource r, Resource property, float defaultValue) throws DatabaseException {
		Float d = graph.getPossibleRelatedValue(r, property, Bindings.FLOAT);
		return d != null ? d : defaultValue;
	}

	private static double safeDoubleProperty(ReadGraph graph, Resource r, Resource property, double defaultValue) throws DatabaseException {
		Double d = graph.getPossibleRelatedValue(r, property, Bindings.DOUBLE);
		return d != null ? d : defaultValue;
	}

	private static float limit(float min, float max, float value) {
		return Math.max(min, Math.min(value,  max));
	}

	@SuppressWarnings("unused")
	private static double limit(double min, double max, double value) {
		return Math.max(min, Math.min(value,  max));
	}

}