package org.simantics.district.network.techtype.variable;

import org.simantics.databoard.binding.Binding;
import org.simantics.databoard.type.Datatype;
import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.WriteGraph;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.layer0.variable.ValueAccessor;
import org.simantics.db.layer0.variable.Variable;
import org.simantics.district.network.techtype.TechTypeUtils;
import org.simantics.scl.reflection.annotations.SCLValue;
import org.simantics.structural.stubs.StructuralResource2;

public class Functions {
	@SCLValue(type = "ValueAccessor")
	public static final ValueAccessor techTypeCodeValueAccessor = new ValueAccessor() {

		@Override
		public Object getValue(ReadGraph graph, Variable context) throws DatabaseException {
			return org.simantics.db.layer0.function.All.standardValueAccessor.getValue(graph, context);
		}

		@Override
		public Object getValue(ReadGraph graph, Variable context, Binding binding) throws DatabaseException {
			return org.simantics.db.layer0.function.All.standardValueAccessor.getValue(graph, context, binding);
		}

		@Override
		public void setValue(WriteGraph graph, Variable context, Object value) throws DatabaseException {
			org.simantics.db.layer0.function.All.standardValueAccessor.setValue(graph, context, value);
			
			updateComponentProperties(graph, context, value);
		}

		@Override
		public void setValue(WriteGraph graph, Variable context, Object value, Binding binding)
				throws DatabaseException {
			org.simantics.db.layer0.function.All.standardValueAccessor.setValue(graph, context, value, binding);
			
			updateComponentProperties(graph, context, value);
		}

		@Override
		public Datatype getDatatype(ReadGraph graph, Variable context) throws DatabaseException {
			return org.simantics.db.layer0.function.All.standardValueAccessor.getDatatype(graph, context);
		}
		
	};

	protected static void updateComponentProperties(WriteGraph graph, Variable context, Object value) throws DatabaseException {
		Variable component = context.getParent(graph);
		Resource type = component.getPossibleType(graph, StructuralResource2.getInstance(graph).Component);
		if (type == null)
			return;
		
		TechTypeUtils.updateComponent(graph, component.getRepresents(graph));
	}
}