package de.intevation.flys.exports;

import org.apache.log4j.Logger;

import org.jfree.data.xy.XYSeries;

import org.w3c.dom.Document;

import de.intevation.artifactdatabase.state.ArtifactAndFacet;
import de.intevation.artifactdatabase.state.Facet;

import de.intevation.flys.artifacts.FLYSArtifact;

import de.intevation.flys.artifacts.model.FacetTypes;
import de.intevation.flys.artifacts.model.MiddleBedHeightData;

import de.intevation.flys.jfree.FLYSAnnotation;
import de.intevation.flys.jfree.StyledXYSeries;

import de.intevation.flys.utils.FLYSUtils;


/**
 * An OutGenerator that generates middle bed height charts.
 *
 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
 */
public class MiddleBedHeightGenerator
extends      XYChartGenerator
implements   FacetTypes
{
    public enum YAXIS {
        H(0);
        protected int idx;
        private YAXIS(int c) {
           idx = c;
        }
    }

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

    /** Key to look up internationalized String for annotations label. */
    public static final String I18N_ANNOTATIONS_LABEL =
        "chart.bedheight_middle.annotations.label";

    public static final String I18N_CHART_TITLE =
        "chart.bedheight_middle.section.title";

    public static final String I18N_CHART_SUBTITLE =
        "chart.bedheight_middle.section.subtitle";

    public static final String I18N_CHART_SHORT_SUBTITLE =
        "chart.bedheight_middle.section.shortsubtitle";

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

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

    public static final String I18N_CHART_TITLE_DEFAULT  = "Mittlere Sohlöhe";
    public static final String I18N_XAXIS_LABEL_DEFAULT  = "km";
    public static final String I18N_YAXIS_LABEL_DEFAULT  = "mittlere Sohlhöhen [müNN]";



    @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();
            }
        };
    }


    /**
     * Returns the default title for this chart.
     *
     * @return the default title for this chart.
     */
    @Override
    public String getDefaultChartTitle() {
        Object[] args = new Object[] {
            getRiverName()
        };

        return msg(I18N_CHART_TITLE, I18N_CHART_TITLE_DEFAULT, args);
    }


    /**
     * Get internationalized label for the x axis.
     */
    @Override
    protected String getDefaultXAxisLabel() {
        FLYSArtifact flys = (FLYSArtifact) master;

        return msg(
            I18N_XAXIS_LABEL,
            I18N_XAXIS_LABEL_DEFAULT,
            new Object[] { FLYSUtils.getRiver(flys).getName() });
    }


    @Override
    protected String getDefaultYAxisLabel(int index) {
        String label = "default";

        if (index == YAXIS.H.idx) {
            label = getHAxisLabel();
        }

        return label;
    }


    /**
     * Get internationalized label for the y axis.
     */
    protected String getHAxisLabel() {
        FLYSArtifact flys = (FLYSArtifact) master;

        return msg(I18N_YAXIS_LABEL, I18N_YAXIS_LABEL_DEFAULT);
    }


    /**
     * Produce output.
     * @param artifactAndFacet current facet.
     * @param attr  theme for facet
     */
    public void doOut(
        ArtifactAndFacet artifactAndFacet,
        Document         attr,
        boolean          visible
    ) {
        String name = artifactAndFacet.getFacetName();

        logger.debug("MiddleBedHeightGenerator.doOut: " + name);

        if (name == null) {
            logger.error("No facet name for doOut(). No output generated!");
            return;
        }

        Facet facet = artifactAndFacet.getFacet();

        if (facet == null) {
            return;
        }

        if (name.equals(MIDDLE_BED_HEIGHT_SINGLE) || name.equals(MIDDLE_BED_HEIGHT_EPOCH)) {
            doHeightOut(
                (MiddleBedHeightData) artifactAndFacet.getData(context),
                artifactAndFacet,
                attr,
                visible);
        }
        else if (name.equals(MIDDLE_BED_HEIGHT_ANNOTATION)) {
            doAnnotations(
                (FLYSAnnotation) artifactAndFacet.getData(context),
                 artifactAndFacet,
                 attr,
                 visible);
        }
        else if (FacetTypes.IS.AREA(name)) {
            doArea(
                artifactAndFacet.getData(context),
                artifactAndFacet,
                attr,
                visible);
        }
        else if (FacetTypes.IS.MANUALPOINTS(name)) {
            doPoints(
                artifactAndFacet.getData(context),
                artifactAndFacet,
                attr,
                visible,
                YAXIS.H.idx);
        }
        else {
            logger.warn("Unknown facet name: " + name);
            return;
        }
    }


    /**
     * @param data A data object
     * @param facet The facet. This facet does NOT support any data objects. Use
     * FLYSArtifact.getNativeFacet() instead to retrieve a Facet which supports
     * data.
     * @param theme The theme that contains styling information.
     * @param visible The visibility of the curve.
     */
    protected void doHeightOut(
        MiddleBedHeightData data,
        ArtifactAndFacet    aandf,
        Document            theme,
        boolean             visible
    ) {
        logger.debug("MiddleBedHeightGenerator.doMainChannelOut");

        XYSeries series = new StyledXYSeries(aandf.getFacetDescription(), theme);

        StyledSeriesBuilder.addPoints(series, data.getMiddleHeightsPoints(), true);

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


    /** Look up the axis identifier for a given facet type. */
    public int axisIdxForFacet(String facetName) {
        if (FacetTypes.IS.H(facetName)) {
            return YAXIS.H.idx;
        }
        else {
            logger.warn("Could not find axis for facet " + facetName);
            return YAXIS.H.idx;
        }
    }


    /**
     * Do Area out.
     * @param theme styling information.
     * @param visible whether or not visible.
     */
    protected void doArea(
        Object     o,
        ArtifactAndFacet aandf,
        Document   theme,
        boolean    visible
    ) {
        logger.debug("FlowVelocityGenerator.doArea");
        logger.warn("TODO: Implement FlowVelocityGenerator.doArea");
    }
}
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