package org.simantics.xml.sax.base;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.simantics.db.Resource;
import org.simantics.db.WriteGraph;
import org.simantics.db.common.utils.ListUtils;
import org.simantics.db.exception.DatabaseException;
import org.simantics.layer0.Layer0;
import org.simantics.utils.datastructures.MapList;
import org.xml.sax.Attributes;

public class ParserElement implements Serializable {
	private static final long serialVersionUID = -5207502156942818875L;
	String uri;
	String localName;
	String qName;
	Map<String, Attribute> attributes;
	MapList<Resource, ParserElement> lists;

	XMLElementParser elementParser;
	XMLParser xmlParser;

	public ParserElement(String uri, String localName, String qName, Attributes attributes) {
		this.uri = uri;
		this.localName = localName;
		this.qName = qName;
		int attrCount = attributes.getLength();
		this.attributes = new HashMap<>(attrCount);
		for (int i = 0; i < attrCount; i++) {
			this.attributes.put(attributes.getLocalName(i),new Attribute(attributes.getLocalName(i),attributes.getQName(i),attributes.getURI(i),attributes.getValue(i)));
		}
	}
	
	public ParserElement(String uri, String localName, String qName, Collection<Attribute> attributes) {
		this.uri = uri;
		this.localName = localName;
		this.qName = qName;
		this.attributes = new HashMap<>(attributes.size());
		for (Attribute a : attributes) {
			this.attributes.put(a.localName,new Attribute(a.localName,a.qName,a.uri,a.value));
		}
	}

	public String getUri() {
		return uri;
	}

	public String getLocalName() {
		return localName;
	}

	public String getQName() {
		return qName;
	}

	public Collection<Attribute> getAttributes() {
		return attributes.values();
	}
	
	public Attribute getAttribute(String name) {
		return attributes.get(name);
	}

	private Resource data;
	
	public void setData(Resource data) {
		this.data = data;
	}
	
	public Resource getData() {
		return data;
	}
	
	public void setElementParser(XMLElementParser parser) {
		this.elementParser = parser;
	}
	
	public XMLElementParser getElementParser() {
		return elementParser;
	}
	
	public void setXMLParser(XMLParser parser) {
		this.xmlParser = parser;
	}
	
	public XMLParser getXMLParser() {
		return xmlParser;
	}

	public void registerListChild(Resource predicate, ParserElement child) {
		if (lists == null)
			lists = new MapList<>();
		lists.add(predicate, child);
	}

	public void createLists(WriteGraph graph) throws DatabaseException {
		if (lists == null)
			return;
		Layer0 L0 = Layer0.getInstance(graph);
		for (Resource predicate : lists.getKeys()) {
			List<Resource> children = new ArrayList<>();
			for (ParserElement child : lists.getValues(predicate))
				children.add(child.getData());
			Resource list = ListUtils.create(graph, L0.List, L0.List_Element, null, children);
			graph.claim(getData(), predicate, list);
		}
	}

}