package org.simantics.district.network.ui;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.WriteGraph;
import org.simantics.db.exception.DatabaseException;
import org.simantics.diagram.stubs.DiagramResource;
import org.simantics.diagram.synchronization.graph.layer.GraphLayer;
import org.simantics.diagram.synchronization.graph.layer.GraphLayerUtil;
import org.simantics.diagram.synchronization.graph.layer.IGraphLayerUtil;
import org.simantics.district.network.ontology.DistrictNetworkResource;
import org.simantics.layer0.Layer0;

public class DNGraphLayerUtil implements IGraphLayerUtil {

    public DNGraphLayerUtil(Resource layer) {
        
    }

    @Override
    public GraphLayer loadLayer(ReadGraph graph, Resource layer) throws DatabaseException {
        Layer0 L0 = Layer0.getInstance(graph);
        DistrictNetworkResource DN = DistrictNetworkResource.getInstance(graph);
        String name = graph.getRelatedValue(layer, L0.HasName);
        Resource inLayer = graph.getSingleObject(layer, DN.HasInLayerTag);
        
        Map<String, Resource> properties = new HashMap<>();
        properties.put("IN_LAYER", inLayer);

        return new GraphLayer(name, layer, properties);
    }

    @Override
    public GraphLayer createLayer(WriteGraph graph, String layerName, boolean active) throws DatabaseException {
        Layer0 L0 = Layer0.getInstance(graph);
        DiagramResource DIA = DiagramResource.getInstance(graph);
        DistrictNetworkResource DN = DistrictNetworkResource.getInstance(graph);
        
        
        Resource layer = graph.newResource();
        graph.claim(layer, L0.InstanceOf, null, DN.Layer);

        // Assign tagging relations
        Resource inLayerTag = GraphLayerUtil.newTag(graph, L0, DN.InLayer);
        graph.claim(layer, DN.HasInLayerTag, inLayerTag);

        // Assign shared name property for all, the layer and the tags
        Resource name = graph.newResource();
        graph.claim(name, L0.InstanceOf, null, L0.String);
        graph.claimValue(name, layerName);

        graph.claim(layer, L0.HasName, name);
        graph.claim(inLayerTag, L0.HasName, name);
        
        graph.claim(layer, DN.HasSpatialRefSystem, DN.EPSG_4326);

        GraphLayerUtil.setLayerActive(graph, DIA, layer, active);

        return new GraphLayer(layerName, layer, Collections.emptyMap());
    }

}