/**
 *
 */
package de.intevation.gnv.state;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;

import org.apache.log4j.Logger;

import com.vividsolutions.jts.geom.Point;
import com.vividsolutions.jts.io.ParseException;
import com.vividsolutions.jts.io.WKTReader;

import de.intevation.gnv.geobackend.base.Result;
import de.intevation.gnv.state.describedata.DefaultKeyValueDescribeData;
import de.intevation.gnv.state.describedata.KeyValueDescibeData;
import de.intevation.gnv.state.describedata.NamedArrayList;
import de.intevation.gnv.state.describedata.NamedCollection;
import de.intevation.gnv.utils.InputValidator;
import de.intevation.gnv.utils.exception.ValidationException;

/**
 * @author Tim Englich <tim.englich@intevation.de>
 *
 */
public class CoordinateSelectionState extends StateBase {

    /**
     * the logger, used to log exceptions and additonaly information
     */
    private static Logger log = Logger.getLogger(CoordinateSelectionState.class);
    
    /**
     * The UID of this Class
     */
    private static final long serialVersionUID = 6318923553625195063L;

    /**
     * Constructor
     */
    public CoordinateSelectionState() {
        super();
    }

    @Override
    protected void purifyResult(Collection<Result> result, String uuid) {
        log.debug("CoordinateSelectionState.purifyResult");
        Collection<Object> describeData = this.getDescibeData(uuid);
        if (describeData == null) {
            describeData = new ArrayList<Object>();
        }
        NamedCollection<KeyValueDescibeData> keyValueDescibeData = this
                .extractKVP(result, "FEATUREID", "SHAPE");
        describeData.add(keyValueDescibeData);
        this.setDescibeData(uuid, describeData);
    }
    
    @Override
    protected String prepareInputData4RegionDBQuery(String value) {
        log.debug("CoordinateSelectionState.prepareInputData4RegionDBQuery");
        double distance=0.;
        String returnValue = null;
        try {
            Point center = new InputValidator().getPointValue(value);
            String meshIDValue = super.inputData.get("meshid").getValue();
            int segments = 97;
            int meshid = new Integer(meshIDValue);
            if (meshid == 3 || meshid == 5){ // TODO nicht hier festbrennen.
                distance = 0.15; //nord-ostsee 6nm // 97 Stützpunkte
            }else if (meshid == 1 || meshid == 4){
                distance = 0.03; //Kuestenmodell 1 nm
            }else if (meshid == 2 || meshid == 321){
                distance = 0.3; //SST Karten ca 20km
            }else if (meshid == 641){
                distance = 0.3; //Eisdaten Klima
            }
            returnValue = center.buffer(distance,segments).toText();
        } catch (NumberFormatException e) {
            log.error(e,e);
        } catch (ValidationException e) {
            log.error(e,e);
        }
        return returnValue;
        
    }
    
    /**
     * @see de.intevation.gnv.state.StateBase#extractKVP(java.util.Collection, java.lang.String, java.lang.String)
     */
    @Override
    protected NamedCollection<KeyValueDescibeData> extractKVP(
            Collection<Result> result,
            String keyid,
            String valueid) {
        Iterator<Result> rit = result.iterator();
        NamedCollection<KeyValueDescibeData> keyValueDescibeData = new NamedArrayList<KeyValueDescibeData>(
        this.dataName, result.size());
        keyValueDescibeData.setMultiSelect(this.dataMultiSelect);
        String prevKey = null;
        while (rit.hasNext()) {
            Result resultValue = rit.next();
            String key = resultValue.getString(keyid);
            if(prevKey == null || !prevKey.equals(key)){ // TODO: FIXME: We have to do that because the arcsde does not support a distinct Query on Layers
                String geomString = this.convert2DisplayCoordinate(resultValue.getString(valueid));
                String value = geomString;
                if (resultValue.getResultDescriptor().getColumnIndex("VALUE") > 0){
                    value = resultValue.getString("VALUE") + " - "+value;
                }
                
                
                keyValueDescibeData.add(new DefaultKeyValueDescribeData(key,value ));
            }
            prevKey = key;
        }
        return keyValueDescibeData;
    }
    
    protected String convert2DisplayCoordinate(String wkt){
        String formattedCoordinate = null;
        try {
            Point p = (Point)new WKTReader().read(wkt);
            double lat = p.getY();
            double lon =p.getX();
            String nord="N";
            String ost="E";
            if (lat <0 ){nord="S"; lat=-lat;}
            if (lon <0 ){ost="W"; lon=-lon;}
            formattedCoordinate =  String.format("%1$02d°%2$1S %3$05.2f' %4$03d°%5$1S %6$05.2f'",
                                  (int)lat, nord,60.*(lat-((int)lat)),(int)lon,ost,60.*(lon-((int)lon)));
        } catch (ParseException e) {
            log.error(e,e);
        }
        
        return formattedCoordinate;
    }
}