package org.simantics.district.network.ui.adapters;

import java.awt.geom.Path2D;

import org.simantics.db.AsyncReadGraph;
import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.procedure.AsyncProcedure;
import org.simantics.diagram.adapter.SyncElementFactory;
import org.simantics.diagram.stubs.DiagramResource;
import org.simantics.diagram.synchronization.IModifiableSynchronizationContext;
import org.simantics.diagram.synchronization.SynchronizationHints;
import org.simantics.diagram.synchronization.graph.GraphSynchronizationHints;
import org.simantics.diagram.synchronization.graph.layer.GraphLayerManager;
import org.simantics.district.network.ModelledCRS;
import org.simantics.district.network.ontology.DistrictNetworkResource;
import org.simantics.district.network.ui.DistrictNetworkEdge;
import org.simantics.g2d.canvas.ICanvasContext;
import org.simantics.g2d.diagram.DiagramHints;
import org.simantics.g2d.diagram.IDiagram;
import org.simantics.g2d.element.ElementClass;
import org.simantics.g2d.element.IElement;
import org.simantics.g2d.element.handler.impl.StaticObjectAdapter;
import org.simantics.g2d.layers.ILayersEditor;

public class DistrictNetworkEdgeElementFactory extends SyncElementFactory {

    public static final ElementClass CLASS = DistrictNetworkEdgeElement.CLASS;
    
    private DistrictNetworkResource DN;
    private DiagramResource DIA;
    
    public DistrictNetworkEdgeElementFactory(ReadGraph graph) {
        this.DN = DistrictNetworkResource.getInstance(graph);
        this.DIA = DiagramResource.getInstance(graph);
    }
    
    @Override
    public void create(AsyncReadGraph graph, ICanvasContext canvas, IDiagram diagram, Resource elementType, AsyncProcedure<ElementClass> procedure) {
        procedure.execute(graph, CLASS.newClassWith(false, new StaticObjectAdapter(elementType)));
    }
    
    @Override
    protected Resource getElementClassBaseType(AsyncReadGraph graph) {
        return DN.Edge;
    }
    
    @Override
    public void load(ReadGraph graph, ICanvasContext canvas, IDiagram diagram, Resource edgeResource, IElement element) throws DatabaseException {
        
        Resource startVertex = graph.getSingleObject(edgeResource, DN.HasStartVertex);
        Resource endVertex = graph.getSingleObject(edgeResource, DN.HasEndVertex);
        
        // TODO: fix scale..
        double scale = 100000;
        
        double[] startCoords = graph.getRelatedValue2(startVertex, DIA.HasLocation);
        
        double startLon = ModelledCRS.longitudeToX(startCoords[0]) * scale;
        double startLat = ModelledCRS.latitudeToY(startCoords[1]) * scale;
        
        double[] endCoords = graph.getRelatedValue2(endVertex, DIA.HasLocation);
        
        double endLon = ModelledCRS.longitudeToX(endCoords[0]) * scale;
        double endLat = ModelledCRS.latitudeToY(endCoords[1]) * scale;
        
        Path2D path = new Path2D.Double();
        path.moveTo(startLon, startLat);
        path.lineTo(endLon, endLat);
        
        DistrictNetworkEdge edge = new DistrictNetworkEdge(path);

        Resource mapping = graph.getSingleObject(edgeResource, DistrictNetworkResource.getInstance(graph).HasMapping);
        element.setHint(DistrictNetworkAdditionalColor.KEY_DN_MAPPING_RESOURCE, mapping);
        
        element.setHint(DistrictNetworkEdgeElement.KEY_DN_EDGE, edge);
        
        IModifiableSynchronizationContext context = diagram.getHint(SynchronizationHints.CONTEXT);
        GraphLayerManager layerManager = context.get(GraphSynchronizationHints.GRAPH_LAYER_MANAGER);
        
        ILayersEditor layersEditor = diagram.getHint(DiagramHints.KEY_LAYERS_EDITOR);
        layerManager.loadLayersForElement(graph, layersEditor, element, edgeResource);
        
    }
}