/*
 * Copyright (c) 2010 by Intevation GmbH
 *
 * This program is free software under the LGPL (>=v2.1)
 * Read the file LGPL.txt coming with the software for details
 * or visit http://www.gnu.org/licenses/ if it does not exist.
 */

package de.intevation.gnv.statistics;

import java.sql.SQLException;
import java.util.Collection;

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.KeyValueDescibeData;
import de.intevation.gnv.utils.DistanceCalculator;

/**
 * This class is used to create a statistic for 'Horizontalprofil' products.
 *
 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
 *
 */
public class HorizontalProfileStatistics extends TimeseriesStatistics {

    private static Logger log = Logger.getLogger(HorizontalProfileStatistics.class);

    private WKTReader wktReader = new WKTReader();

    private DistanceCalculator dc = new DistanceCalculator();

    private double distance = 0;

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


    @Override
    protected double calculateXOrdinateValue(Result previousRow,Result row)
                     throws SQLException {
        try {
            Point start = (Point)this.wktReader.read(previousRow.getString("SHAPE"));
            Point current = (Point)this.wktReader.read(row.getString("SHAPE"));
            double delta = DistanceCalculator.calculateDistance(start, current);

            if (!Double.isNaN(delta)){
                this.distance = this.distance + delta;
            }
        } catch (ParseException e) {
            log.error(e,e);
        }
        return this.distance;
    }


    @Override
    protected String generateStatisticsName(
                                            String break1,
                                            String break2,
                                            String break3,
                                            Collection<KeyValueDescibeData> parameters,
                                            Collection<KeyValueDescibeData> measurements,
                                            Collection<KeyValueDescibeData> dates) {
        return (this.findValueTitle(parameters, break1)+ " "+
                this.findValueTitle(measurements,break2)).trim()+" "+
                this.findValueTitle(dates,break3);
    }


    @Override
    protected void clearStatistics() {
        log.debug("HorizontalProfileStatistics.clearStatistics");
        super.clearStatistics();
        this.distance = 0;
    }

}