/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
 * Software engineering by Intevation GmbH
 *
 * 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.exports.sq;

import org.dive4elements.artifactdatabase.state.ArtifactAndFacet;
import org.dive4elements.artifactdatabase.state.Facet;

import org.dive4elements.river.artifacts.model.FacetTypes;

import org.dive4elements.river.artifacts.model.sq.SQ;
import org.dive4elements.river.artifacts.model.sq.SQFunction;

import org.dive4elements.river.exports.XYChartGenerator;

import org.dive4elements.river.jfree.JFreeUtil;
import org.dive4elements.river.jfree.StyledXYSeries;

import org.apache.log4j.Logger;

import org.jfree.chart.axis.LogarithmicAxis;
import org.jfree.chart.axis.NumberAxis;

import org.jfree.data.xy.XYSeries;

import org.w3c.dom.Document;

/**
 * An OutGenerator that generates charts for MINFO sq relation.
 *
 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
 */
public class SQRelationGenerator
extends      XYChartGenerator
implements   FacetTypes
{
    public enum YAXIS {
        S(0);
        protected int idx;
        private YAXIS(int c) {
           idx = c;
        }
    }


    public static final String I18N_XAXIS_LABEL =
        "chart.sq_relation.xaxis.label";

    public static final String I18N_YAXIS_LABEL =
        "chart.sq_relation.yaxis.label";


    /** The logger that is used in this generator. */
    private static Logger logger = Logger.getLogger(SQRelationGenerator.class);


    @Override
    protected YAxisWalker getYAxisWalker() {
        return new YAxisWalker() {
            @Override
            public int length() {
                return YAXIS.values().length;
            }

            @Override
            public String getId(int idx) {
                YAXIS[] yaxes = YAXIS.values();
                return yaxes[idx].toString();
            }
        };
    }


    @Override
    public String getDefaultChartTitle() {
        return "TODO: CHART TITLE";
    }


    @Override
    protected String getDefaultXAxisLabel() {
        return msg(I18N_XAXIS_LABEL, I18N_XAXIS_LABEL);
    }


    @Override
    protected String getDefaultYAxisLabel(int index) {
        return msg(I18N_YAXIS_LABEL, I18N_YAXIS_LABEL);
    }


    @Override
    protected NumberAxis createXAxis(String label) {
        return new LogarithmicAxis(label);
    }


    @Override
    protected NumberAxis createYAxis(int index) {
        return new LogarithmicAxis(getDefaultYAxisLabel(index));
    }


    @Override
    public void doOut(
        ArtifactAndFacet artifactAndFacet,
        Document         attr,
        boolean          visible
    ) {
        logger.debug("doOut");

        Facet  facet = artifactAndFacet.getFacet();
        String name  = facet != null ? facet.getName() : null;

        if (name == null || name.length() == 0) {
            logger.warn("Invalid facet with no name given!");
            return;
        }

        if (IS.SQ_CURVE(name)) {
            doSQCurveOut(artifactAndFacet, attr, visible);
        }
        else if (IS.SQ_MEASUREMENT(name)) {
            doSQOut(artifactAndFacet, attr, visible);
        }
        else if (IS.SQ_OUTLIER(name)) {
            doSQOut(artifactAndFacet, attr, visible);
        }
        else if (IS.MANUALPOINTS(name)) {
            doPoints(
                artifactAndFacet.getData(context),
                artifactAndFacet,
                attr,
                visible,
                YAXIS.S.idx);
        }
    }


    protected void doSQCurveOut(
        ArtifactAndFacet artifactAndFacet,
        Document         attr,
        boolean          visible
    ) {
        String desc = artifactAndFacet.getFacetDescription();
        logger.debug("doSQCurveOut: " + desc);

        SQFunction func = (SQFunction) artifactAndFacet.getData(context);

        if (func == null) {
            return;
        }

        XYSeries series = JFreeUtil.sampleFunction2DPositive(
            func.getFunction(),
            attr,
            desc,
            500,
            Math.max(func.getMinQ(), 0.01),
            Math.max(func.getMaxQ(), 0.02));

        if (logger.isDebugEnabled()) {
            logger.debug("Series '" + desc + "' has "
                + series.getItemCount() + " items.");

            logger.debug("   -> min x = " + series.getMinX());
            logger.debug("   -> max x = " + series.getMaxX());
            logger.debug("   -> min y = " + series.getMinY());
            logger.debug("   -> max y = " + series.getMaxY());
        }

        addAxisSeries(series, YAXIS.S.idx, visible);
    }


    protected void doSQOut(
        ArtifactAndFacet artifactAndFacet,
        Document         attr,
        boolean          visible
    ) {
        String desc = artifactAndFacet.getFacetDescription();
        logger.debug("doSQOut: " + desc);

        SQ[]     sqs    = (SQ[]) artifactAndFacet.getData(context);
        if (sqs == null) {
            logger.debug("No SQs found for facet");
            return;
        }
        XYSeries series = new StyledXYSeries(desc, attr);

        for (SQ sq: sqs) {
            double q = sq.getQ();
            double s = sq.getS();
            if (s > 0d && q > 0d) {
                series.add(q, s, false);
            }
        }

        if (logger.isDebugEnabled()) {
            logger.debug("Series '" + desc + "' has "
                + series.getItemCount() + " items.");

            logger.debug("   -> min x = " + series.getMinX());
            logger.debug("   -> max x = " + series.getMaxX());
            logger.debug("   -> min y = " + series.getMinY());
            logger.debug("   -> max y = " + series.getMaxY());
        }

        addAxisSeries(series, YAXIS.S.idx, visible);
    }
}
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