package org.simantics.district.network.profile;

import java.awt.Color;
import java.util.Map;

import org.simantics.databoard.Bindings;
import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.common.procedure.adapter.TransientCacheAsyncListener;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.layer0.variable.Variable;
import org.simantics.db.layer0.variable.Variables;
import org.simantics.district.network.ontology.DistrictNetworkResource;
import org.simantics.district.network.visualisations.DynamicVisualisationsContributions.DynamicColoringObject;
import org.simantics.district.network.visualisations.model.DynamicColorContribution;
import org.simantics.district.network.visualisations.model.DynamicColorMap;
import org.simantics.district.network.visualisations.model.DynamicVisualisation;
import org.simantics.layer0.Layer0;
import org.simantics.modeling.ModelingResources;
import org.simantics.scenegraph.INode;
import org.simantics.scenegraph.g2d.nodes.SingleElementNode;
import org.simantics.scenegraph.profile.EvaluationContext;
import org.simantics.scenegraph.profile.common.ProfileVariables;
import org.simantics.scl.runtime.SCLContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Tuukka Lehtonen
 * @since 1.35.0
 */
public class DNElementColorStyle extends ThrottledStyleBase<Color> {

    private static final Logger LOGGER = LoggerFactory.getLogger(DNElementColorStyle.class);

    private static final boolean DEBUG = false;

	@Override
	public Color calculateThrottledStyle(ReadGraph graph, Resource runtimeDiagram, Resource entry, Resource groupItem) throws DatabaseException {
	    
        DynamicVisualisation dv = graph.syncRequest(new RuntimeDynamicVisualisationsRequest(runtimeDiagram),
                TransientCacheAsyncListener.instance());

        // Prevent PendingVariableExceptions from coming through
        boolean wasSynchronous = graph.setSynchronous(true);
        try {
            if (dv != null) {
                Layer0 L0 = Layer0.getInstance(graph);
                DistrictNetworkResource DN = DistrictNetworkResource.getInstance(graph);
                ModelingResources MOD = ModelingResources.getInstance(graph);
                Resource mapping = graph.getSingleObject(groupItem, DN.HasMapping);
            
                Map<String, DynamicColorContribution> colorContributions = dv.getColorContributions();
                String mappingName = graph.getRelatedValue(mapping, L0.HasName);
                DynamicColorContribution dcc = colorContributions.get(mappingName);
                if (dcc != null && dcc.isUsed()) {
    
                    Resource mappedComponent = graph.getPossibleObject(groupItem, DN.MappedComponent);
                    if (mappedComponent != null) {
    
                        Resource component = graph.getSingleObject(mappedComponent, MOD.ElementToComponent);
                        Variable variable = Variables.getVariable(graph, component);
                        Variable possibleActiveVariable = Variables.possibleActiveVariable(graph, variable);
                        if (possibleActiveVariable != null) {
    
                            Variable module = possibleActiveVariable.getPossibleChild(graph, dcc.getModuleName());
                            if (module != null) {
                                Variable attribute = module.getPossibleProperty(graph, dcc.getAttributeName());
                                if (attribute != null) {
                                    Double possibleValue = attribute.getPossibleValue(graph, Bindings.DOUBLE);
                                    if (possibleValue != null) {
                                        
                                        double minValue;
                                        double maxValue;
                                        if (dcc.isUseDefault()) {
                                            DynamicColoringObject dynamicColoringObject = dv.getDefaultColorContributions().get(mappingName);
                                            
                                            // This is required if ontology module needs to be compiled
                                            Object currentGraph = SCLContext.getCurrent().get("graph");
                                            try {
                                                SCLContext.getCurrent().put("graph", graph);
                                                
                                                DynamicColorContribution ddcc = dynamicColoringObject.getColorContributions().get(dcc.getLabel());
                                                minValue = ddcc.getDefaultMin();
                                                maxValue = ddcc.getDefaultMax();
                                            } finally {
                                                SCLContext.getCurrent().put("graph", currentGraph);
                                            }
                                        } else {
                                            minValue = dcc.getDefaultMin();
                                            maxValue = dcc.getDefaultMax();
                                        }
                                        // here we do the adjusting according to spec in #15038
                                        double adjustedValue = possibleValue.doubleValue() * dcc.getVariableGain() + dcc.getVariableBias();
                                        DynamicColorMap defaultColorMap = dcc.getDefaultColorMap();
                                        Color color = defaultColorMap.getColor(adjustedValue, dv.getColorBarOptions().isUseGradients(), minValue, maxValue);
                                        return color;
                                    } else {
                                        LOGGER.warn("No value for {}", attribute.getURI(graph));
                                    }
                                } else {
                                    LOGGER.warn("Wrong attribute name {} for {} !!", dcc.getAttributeName(), module.getURI(graph));
                                }
                            } else {
                                LOGGER.warn("Wrong modulename {} for {} !!", dcc.getModuleName(), possibleActiveVariable.getURI(graph));
                            }
                        } else {
                            LOGGER.debug("No active experiment for {}", variable.getURI(graph));
                        }
                    } else {
                        LOGGER.debug("No mapped component for {} to calculate dynamic color style", groupItem);
                    }
                }
            }
		}
		finally {
			graph.setSynchronous(wasSynchronous);
		}
		return null;
	}

	@Override
	public void applyThrottledStyleForNode(EvaluationContext observer, INode node, Color color) {
		SingleElementNode n = (SingleElementNode) node;
		for (INode nn : n.getNodes())
			ProfileVariables.claimNodeProperty(nn, "dynamicColor", color, observer);
	}

	@Override
	protected void cleanupStyleForNode(EvaluationContext evaluationContext, INode node) {
		SingleElementNode n = (SingleElementNode) node;
		for (INode nn : n.getNodes())
			ProfileVariables.claimNodeProperty(nn, "dynamicColor", null, evaluationContext);
	}

}