/** 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.flood_duration;

import java.util.Set;

import org.apache.commons.lang.math.DoubleRange;
import org.dive4elements.artifacts.CallContext;
import org.dive4elements.river.artifacts.WINFOArtifact;
import org.dive4elements.river.artifacts.model.Calculation;
import org.dive4elements.river.artifacts.model.CalculationResult;
import org.dive4elements.river.artifacts.model.WQDay;
import org.dive4elements.river.artifacts.model.river.RiverInfoProvider;
import org.dive4elements.river.artifacts.resources.Resources;
import org.dive4elements.river.artifacts.sinfo.SINFOArtifact;
import org.dive4elements.river.artifacts.sinfo.tkhstate.WinfoArtifactWrapper;
import org.dive4elements.river.artifacts.sinfo.util.CalculationUtils;
import org.dive4elements.river.artifacts.sinfo.util.RiverInfo;
import org.dive4elements.river.model.River;
import org.dive4elements.river.model.sinfo.Infrastructure;

/**
 * Calculation of the flood durations of the infrastructures of the km range of a river
 *
 * @author Matthias Schäfer
 */
final class FloodDurationCalculation {

    private final CallContext context;

    public FloodDurationCalculation(final CallContext context) {
        this.context = context;
    }

    public CalculationResult calculate(final SINFOArtifact sinfo) {

        final String user = CalculationUtils.findArtifactUser(this.context, sinfo);

        /* access input data */
        final FloodDurationAccess access = new FloodDurationAccess(sinfo);
        final River river = access.getRiver();
        final RiverInfo riverInfo = new RiverInfo(river);
        final DoubleRange calcRange = access.getRange();

        final RiverInfoProvider infoProvider = RiverInfoProvider.forRange(this.context, river, calcRange);
        final String calcModeLabel = Resources.getMsg(this.context.getMeta(), sinfo.getCalculationMode().name());
        final String label = Resources.getMsg(this.context.getMeta(), access.getRiverside().getKey());

        final Calculation problems = new Calculation();

        // Calculate the selected main values, if any
        /* misuse winfo-artifact to calculate waterlevels in the same way */
        final WINFOArtifact winfo = new WinfoArtifactWrapper(sinfo);
        winfo.addStringData("ld_mode", "distance");
        winfo.addStringData("ld_step", "100");

        final FloodDurationCalculationResults results = new FloodDurationCalculationResults(calcModeLabel, user, riverInfo, calcRange);

        calculateResult(label, calcRange, infoProvider, access, problems, winfo, results);

        return new CalculationResult(results, problems);
    }

    /**
     * Calculates the flood durations of the infrastructures of a km range of a river
     */
    private void calculateResult(final String label, final DoubleRange calcRange, final RiverInfoProvider riverInfoProvider, final FloodDurationAccess access,
            final Calculation problems, final WINFOArtifact winfo, final FloodDurationCalculationResults results) {

        final FloodDurationCalculator calculator = new FloodDurationCalculator(this.context, riverInfoProvider);

        // FIXME: fetch from access (fetchInfrastructureTypes only for test purposes)
        final Set<String> infrastructureChoices = Infrastructure.fetchInfrastructureTypes(riverInfoProvider.getRiver(), calcRange.getMinimumDouble(),
                calcRange.getMaximumDouble(), access.getRiverside().getAttributeKey());

        calculator.execute(problems, label, calcRange, access.getRiverside().getAttributeKey(), infrastructureChoices, access.getIsWspl(), winfo, results);
    }

    /**
     * Calculates the flood duration curve of a station
     */
    public WQDay calcStationCurve(final double station, final SINFOArtifact sinfo) {

        /* access input data */
        final FloodDurationAccess access = new FloodDurationAccess(sinfo);
        final River river = access.getRiver();
        final DoubleRange calcRange = access.getRange();
        final RiverInfoProvider infoProvider = RiverInfoProvider.forRange(this.context, river, calcRange);

        final Calculation problems = new Calculation();

        // Calculate the selected main values, if any
        /* misuse winfo-artifact to calculate waterlevels in the same way */
        final WINFOArtifact winfo = new WinfoArtifactWrapper(sinfo);

        final FloodDurationCalculator calculator = new FloodDurationCalculator(this.context, infoProvider);
        if (!Double.isNaN(station)) {
            winfo.addStringData("ld_locations", Double.toString(station));
            return calculator.calcWQDays(problems, station, winfo);
        } else {
            winfo.addStringData("ld_locations", Double.toString(calcRange.getMinimumDouble()));
            return calculator.calcWQDays(problems, calcRange.getMinimumDouble(), winfo);
        }
    }
}