package org.simantics.xml.sax.base;

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

import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;

import org.simantics.databoard.binding.Binding;
import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.Statement;
import org.simantics.db.exception.DatabaseException;
import org.simantics.layer0.Layer0;

public class ValueElementWriter implements XMLElementWriter{
	
	String name;
	Binding binding;
	String typeURI;
	
	public ValueElementWriter(String name, String typeURI,Binding binding) {
		this.name = name;
		this.typeURI = typeURI;
		this.binding = binding;
	}
	
	@Override
	public String getElementId() {
		return name;
	}
	
	@Override
	public Resource getType(ReadGraph graph) throws DatabaseException {
		return graph.getResource(typeURI);
	}
	
	@Override
	public void start(ReadGraph graph, WriterElement instance, XMLStreamWriter writer)
			throws XMLStreamException, DatabaseException {
		writer.writeStartElement(getElementId());
	}
	
	@Override
	public void children(ReadGraph graph, WriterElement instance, Set<Resource> sorted)
			throws XMLStreamException, DatabaseException {
		
	}
	
	@Override
	public void end(ReadGraph graph, WriterElement instance, XMLStreamWriter writer)
			throws XMLStreamException, DatabaseException {
		writer.writeEndElement();
	}
	
	@Override
	public void attributes(ReadGraph graph, WriterElement instance, Collection<Statement> attributes,
			XMLStreamWriter writer) throws XMLStreamException, DatabaseException {
		
	}
	
	@Override
	public void characters(ReadGraph graph, WriterElement instance, XMLStreamWriter writer)
			throws XMLStreamException, DatabaseException {
			Layer0 l0 = Layer0.getInstance(graph);
		Object value = graph.getValue(instance.getResource(), binding);
		writer.writeCharacters(value.toString());
//		if (binding == Bindings.STRING) {
//			graph.claim(element.getData(), l0.InstanceOf, l0.String);
//			graph.claimValue(element.getData(), string, binding);
//		} else if (binding == Bindings.INTEGER) {
//			graph.claim(element.getData(), l0.InstanceOf, l0.Integer);
//			graph.claimValue(element.getData(), Integer.parseInt(string), binding);
//		} else if (binding == Bindings.FLOAT) {
//			graph.claim(element.getData(), l0.InstanceOf, l0.Float);
//			graph.claimValue(element.getData(), Float.parseFloat(string), binding);
//		} else if (binding == Bindings.DOUBLE) {
//			graph.claim(element.getData(), l0.InstanceOf, l0.Double);
//			graph.claimValue(element.getData(), Double.parseDouble(string), binding);
//		} else if (binding == Bindings.BOOLEAN) {
//			graph.claim(element.getData(), l0.InstanceOf, l0.Boolean);
//			graph.claimValue(element.getData(), Boolean.parseBoolean(string), binding);
//		} else if (binding == Bindings.LONG) {
//			graph.claim(element.getData(), l0.InstanceOf, l0.Long);
//			graph.claimValue(element.getData(), Long.parseLong(string), binding);
//		} else if (binding == Bindings.BYTE) {
//			graph.claim(element.getData(), l0.InstanceOf, l0.Byte);
//			graph.claimValue(element.getData(), Byte.parseByte(string), binding);
//		} else {
//			throw new DatabaseException("Unknown datatype " + binding);
//		}
	}

}