package org.simantics.g3d.csg.adapters;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

import org.eclipse.core.runtime.IAdaptable;
import org.jcae.opencascade.jni.TopoDS_Shape;
import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.request.Read;
import org.simantics.g3d.csg.scenegraph2.CSGrootNode;
import org.simantics.g3d.csg.scenegraph2.ICSGnode;
import org.simantics.g3d.csg.scenegraph2.SchemaBuilder;
import org.simantics.objmap.graph.IMapping;
import org.simantics.objmap.graph.Mappings;
import org.simantics.objmap.graph.schema.IMappingSchema;
import org.simantics.objmap.structural.IStructuralObject;
import org.simantics.opencascade.SolidModelProvider;
import org.simantics.ui.SimanticsUI;

public class CSGSolidModelAdapter implements SolidModelProvider, IAdaptable, IStructuralObject {
	
	private Resource model;
	
	public CSGSolidModelAdapter(Resource model) {
		this.model = model;
	}
	
	@Override
	public Collection<TopoDS_Shape> getModel() throws Exception {
		return SimanticsUI.getSession().syncRequest(new Read<Collection<TopoDS_Shape>>() {
			@Override
			public Collection<TopoDS_Shape> perform(ReadGraph graph)
					throws DatabaseException {
				Collection<TopoDS_Shape> shapes = new ArrayList<TopoDS_Shape>();
				IMappingSchema<Resource,Object> schema = SchemaBuilder.getSchema(graph);
				IMapping<Resource,Object> mapping = Mappings.createWithoutListening(schema);
				CSGrootNode rootNode = (CSGrootNode)mapping.map(graph, model);
				for (ICSGnode node : rootNode.getNodes("child")) {
					TopoDS_Shape shape = node.getGeometry();
					if (shape != null)
						shapes.add(shape);
				}
				// FIXME: clear CSG scene-graph
				return shapes;
			}
		});
	
	}
	
	@SuppressWarnings("rawtypes")
	@Override
	public Object getAdapter(Class adapter) {
		if (Resource.class.equals(adapter))
			return model;
		return null;
	}
	
	@SuppressWarnings("unchecked")
	@Override
	public List<IStructuralObject> getContext() {
		return Collections.EMPTY_LIST;
	}
	
	@Override
	public Resource getType() {
		return null;
	}
	
	@Override
	public void setContext(List<IStructuralObject> object) {
		throw new RuntimeException();
	}
	
	@Override
	public void setType(Resource type) {
		throw new RuntimeException();	
	}

}