/** 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.common;

import java.util.HashSet;
import java.util.Set;

import org.apache.log4j.Logger;
import org.dive4elements.artifactdatabase.state.ArtifactAndFacet;
import org.dive4elements.artifacts.CallContext;
import org.dive4elements.river.exports.DiagramGenerator;
import org.dive4elements.river.exports.StyledSeriesBuilder;
import org.dive4elements.river.jfree.StyledAreaSeriesCollection;
import org.dive4elements.river.jfree.StyledXYSeries;
import org.dive4elements.river.themes.ThemeDocument;

/**
 * Processor to generate a data series for tkh data loaded from the database
 *
 * @author Matthias Schäfer
 *
 */
public class PredefinedTkhProcessor extends AbstractSInfoProcessor {

    private final static Logger log = Logger.getLogger(PredefinedTkhProcessor.class);

    public static final String FACET_PREDEFINED_TKH = "sinfo_facet_predefined_tkh";

    private static final String I18N_AXIS_LABEL = "sinfo.chart.tkh.section.yaxis.label";

    private static final Set<String> HANDLED_FACET_TYPES = new HashSet<>();

    static {
        HANDLED_FACET_TYPES.add(FACET_PREDEFINED_TKH);
    }

    public PredefinedTkhProcessor() {
        super(I18N_AXIS_LABEL, HANDLED_FACET_TYPES);
    }

    @Override
    protected String generateSeries(final DiagramGenerator generator, final ArtifactAndFacet bundle, final ThemeDocument theme, final boolean visible) {
        final CallContext context = generator.getCallContext();

        final String facetName = bundle.getFacetName();
        final AbstractTkhCalculationResult data = (AbstractTkhCalculationResult) bundle.getData(context);
        if (data == null) {
            // Check has been here before so we keep it for security reasons
            // this should never happen though.
            throw new IllegalStateException("Data is null for facet: " + facetName);
        }

        final StyledXYSeries seriesUp = new StyledXYSeries(bundle.getFacetDescription(), theme);
        final double[][] pointsUp = data.getTkhUpPoints();
        StyledSeriesBuilder.addPoints(seriesUp, pointsUp, true);

        // REMARK: we add " " because the description is misused as id, which must be unique.
        final StyledXYSeries seriesDown = new StyledXYSeries(bundle.getFacetDescription() + " ", theme);
        final double[][] pointsDown = data.getTkhDownPoints();
        StyledSeriesBuilder.addPoints(seriesDown, pointsDown, true);

        final StyledAreaSeriesCollection area = new StyledAreaSeriesCollection(theme);
        area.setMode(StyledAreaSeriesCollection.FILL_MODE.BETWEEN);
        area.addSeries(seriesUp);
        area.addSeries(seriesDown);

        generator.addAreaSeries(area, getAxisName(), visible);

        return null;
    }
}