/* Copyright (C) 2017 by Bundesanstalt für Gewässerkunde
 * Software engineering by
 *  Björnsen Beratende Ingenieure GmbH
 *  Dr. Schumacher Ingenieurbüro für Wasser und Umwelt
 *
 * This file is Free Software under the GNU AGPL (>=v3)
 * and comes with ABSOLUTELY NO WARRANTY! Check out the
 * documentation coming with Dive4Elements River for details.
 */

package org.dive4elements.river.artifacts.sinfo.flowdepth;

import java.util.ArrayList;
import java.util.List;

import org.apache.commons.lang.math.DoubleRange;
import org.apache.commons.math.ArgumentOutsideDomainException;
import org.apache.log4j.Logger;
import org.dive4elements.river.model.River;

import gnu.trove.TDoubleArrayList;

/**
 * @author matthias
 *
 */
public class SoilKindKmValueFinder
{
    /**
     * Private log to use here.
     */
    private static Logger log = Logger.getLogger(SoilKindKmValueFinder.class);

    private TDoubleArrayList kms;
    
    private List<SoilKind> values;
    
    /***** METHODS *****/
    
    /**
     * Searches a km with its soil kind
     */
    public SoilKind findSoilKind(double km) throws ArgumentOutsideDomainException {
        if ((kms == null) || (kms.size() == 0))
            throw new ArgumentOutsideDomainException(km, Double.NaN, Double.NaN);
        int i = kms.binarySearch(km);
        if (i >= 0) {
            // Exact km match
            return values.get(i);
        }
        else {
            // Out of range or within km interval
            if (i < 0)
                i = -i - 1;
            if ((i <= 0) || (i >= kms.size()))
                throw new ArgumentOutsideDomainException(km, Double.NaN, Double.NaN);
            if (km <= ((kms.get(i-1) + kms.get(i)) / 2))
                return values.get(i-1);
            else
                return values.get(i);
        }
    }

    /**
     * Loads the range of the river's kms with their soil kind.
     * @return Whether the load has been successful
     */
    public boolean loadValues(River river, DoubleRange kmRange) {
        kms = new TDoubleArrayList();
        values = new ArrayList<SoilKind>();
        //FIXME Echte Daten aus der Datenbank abfragen
        addKmKind(0, SoilKind.starr);
        addKmKind(15.7, SoilKind.mobil);
        addKmKind(15.8, SoilKind.mobil);
        addKmKind(15.9, SoilKind.starr);
        addKmKind(108.7, SoilKind.mobil);
        addKmKind(108.8, SoilKind.mobil);
        addKmKind(108.9, SoilKind.starr);
        addKmKind(119.1, SoilKind.mobil);
        addKmKind(119.4, SoilKind.mobil);
        addKmKind(119.5, SoilKind.starr);
        addKmKind(128.3, SoilKind.mobil);
        addKmKind(128.9, SoilKind.mobil);
        addKmKind(129, SoilKind.starr);
        addKmKind(133.1, SoilKind.mobil);
        addKmKind(135.9, SoilKind.mobil);
        addKmKind(136, SoilKind.starr);
        addKmKind(136.5, SoilKind.mobil);
        addKmKind(139.9, SoilKind.mobil);
        addKmKind(140, SoilKind.starr);
        addKmKind(140.5, SoilKind.mobil);
        addKmKind(165, SoilKind.mobil);
        addKmKind(165.1, SoilKind.starr);
        addKmKind(165.9, SoilKind.mobil);
        addKmKind(180.8, SoilKind.mobil);
        addKmKind(180.9, SoilKind.starr);
        addKmKind(182, SoilKind.mobil);
        addKmKind(221.3, SoilKind.mobil);
        return true;
    }
    
    private void addKmKind(double km, SoilKind kind) {
        kms.add(km);
        values.add(kind);
    }
}