/*
    * Copyright (c) 2013-2014, Dienst Landelijk Gebied - Ministerie van Economische Zaken
    *
    * Gepubliceerd onder de BSD 2-clause licentie,
    * zie https://github.com/MinELenI/CBSviewer/blob/master/LICENSE.md voor de volledige licentie.
    */
   package nl.mineleni.openls.parser;
   
   import java.io.IOException;
  import java.io.StringReader;
  
  import nl.mineleni.openls.databinding.gml.Point;
  import nl.mineleni.openls.databinding.gml.Pos;
  import nl.mineleni.openls.databinding.openls.Position;
  import nl.mineleni.openls.databinding.openls.ReverseGeocodePreference;
  import nl.mineleni.openls.databinding.openls.ReverseGeocodeRequest;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.xml.sax.Attributes;
  import org.xml.sax.InputSource;
  import org.xml.sax.SAXException;
  
  /**
   * Parse reverse geocode requests.
   *
   * @author prinsmc
   *
   */
  public class OpenLSReverseGeocodeRequestParser extends AbstractOpenLSParser {
  	/** logger. */
  	private static final Logger LOGGER = LoggerFactory
  	        .getLogger(OpenLSReverseGeocodeRequestParser.class);
  
  	/*
  	 * (non-Javadoc)
  	 *
  	 * @see org.xml.sax.helpers.DefaultHandler#endElement(java.lang.String,
  	 * java.lang.String, java.lang.String)
  	 */
  	@Override
  	public void endElement(final String uri, final String localName,
  	        final String qName) throws SAXException {
  		final String[] nsName = qName.split(":");
  		String eName = "";
  		if (nsName.length > 1) {
  			eName = nsName[1];
  		} else {
  			eName = nsName[0];
  		}
  
  		switch (eName.toLowerCase()) {
  		case "reversegeocoderequest":
  			break;
  		case "position":
  			final Position position = (Position) (this.objStack.pop());
  			if (this.objStack.peek().getClass() == ReverseGeocodeRequest.class) {
  				((ReverseGeocodeRequest) (this.objStack.peek()))
  				        .setPosition(position);
  			}
  			break;
  		case "point":
  			final Point point = (Point) (this.objStack.pop());
  			if (this.objStack.peek().getClass() == Position.class) {
  				((Position) (this.objStack.peek())).setPoint(point);
  			}
  			break;
  		case "pos":
  			final Pos pos = (Pos) (this.objStack.pop());
  			pos.setXY(this.eValBuf.toString());
  			if (this.objStack.peek().getClass() == Point.class) {
  				((Point) (this.objStack.peek())).addPos(pos);
  			}
  			break;
  		case "reversegeocodepreference":
  			final ReverseGeocodePreference rcp = (ReverseGeocodePreference) (this.objStack
  			        .pop());
  			rcp.setPreference(this.eValBuf.toString());
  			if (this.objStack.peek().getClass() == ReverseGeocodeRequest.class) {
  				((ReverseGeocodeRequest) (this.objStack.peek()))
  				        .setReverseGeocodePreference(rcp);
  			}
  			break;
  		default:
  			break;
  		}
  
  	}
  
  	/**
  	 * Gets the reverse geocode request.
  	 *
  	 * @return the reverse geocode request
  	 */
  	public ReverseGeocodeRequest getReverseGeocodeRequest() {
  		ReverseGeocodeRequest geocodeRequest = null;
  		if ((this.objStack.firstElement() != null)
  		        && (this.objStack.firstElement().getClass() == ReverseGeocodeRequest.class)) {
  			geocodeRequest = (ReverseGeocodeRequest) this.objStack
 			        .firstElement();
 		}
 		return geocodeRequest;
 	}
 
 	/**
 	 * Parses the open ls reverse geocode response.
 	 *
 	 * @param data
 	 *            the data which is an OpenLS response xml document
 	 * @return the geocode response object, will return null if parsing the data
 	 *         failed
 	 */
 	public ReverseGeocodeRequest parseOpenLSReverseGeocodeRequest(
 	        final String data) {
 		this.objStack.clear();
 		try {
 			this.parser.parse(new InputSource(new StringReader(data)), this);
 		} catch (final SAXException | IOException e) {
 			LOGGER.error("OpenLS request XML verwerken is mislukt: " + data
 			        + ": ", e);
 		}
 		return this.getReverseGeocodeRequest();
 	}
 
 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.xml.sax.helpers.DefaultHandler#startElement(java.lang.String,
 	 * java.lang.String, java.lang.String, org.xml.sax.Attributes)
 	 */
 	@Override
 	public void startElement(final String uri, final String localName,
 	        final String qName, final Attributes attributes)
 	        throws SAXException {
 		this.eValBuf = new StringBuffer();
 		final String[] nsName = qName.split(":");
 		String eName = nsName[0];
 		if (nsName.length > 1) {
 			eName = nsName[1];
 		}
 
 		switch (eName.toLowerCase()) {
 		case "reversegeocoderequest":
 			this.objStack.push(new ReverseGeocodeRequest());
 			break;
 		case "position":
 			this.objStack.push(new Position());
 			break;
 		case "point":
 			final Point point = new Point();
 			for (int i = 0; i < attributes.getLength(); i++) {
 				final String key = attributes.getQName(i);
 				final String value = attributes.getValue(i);
 				if (key.equalsIgnoreCase("srsName")) {
 					point.setSrsName(value);
 				}
 			}
 			this.objStack.push(point);
 			break;
 		case "pos":
 			final Pos pos = new Pos();
 			for (int i = 0; i < attributes.getLength(); i++) {
 				final String key = attributes.getQName(i);
 				final String value = attributes.getValue(i);
 				if (key.equalsIgnoreCase("dimension")) {
 					pos.setDimension(Integer.parseInt(value));
 				}
 			}
 			this.objStack.push(pos);
 			break;
 		case "reversegeocodepreference":
 			this.objStack.push(new ReverseGeocodePreference());
 			break;
 		default:
 			LOGGER.warn("Onbekend element '" + eName + "' wordt genegeerd.");
 			break;
 		}
 	}
 }