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.FlowVelocityData;
import de.intevation.flys.model.FlowVelocityMeasurementValue;

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

import de.intevation.flys.utils.FLYSUtils;


/**
 * An OutGenerator that generates flow velocity curves.
 *
 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
 */
public class FlowVelocityGenerator
extends      XYChartGenerator
implements   FacetTypes
{
    public enum YAXIS {
        V(0),
        T(1),
        Q(2);
        /* TODO Q and Density will come as 4th and 3rd axis. */
        protected int idx;
        private YAXIS(int c) {
           idx = c;
        }
    }

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

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

    /**
     * Key to look up internationalized String for LongitudinalSection diagrams
     * titles.
     */
    public static final String I18N_CHART_TITLE =
        "chart.flow_velocity.section.title";

    /**
     * Key to look up internationalized String for LongitudinalSection diagrams
     * subtitles.
     */
    public static final String I18N_CHART_SUBTITLE =
        "chart.flow_velocity.section.subtitle";

    /**
     * Key to look up internationalized String for LongitudinalSection diagrams
     * short subtitles.
     */
    public static final String I18N_CHART_SHORT_SUBTITLE =
        "chart.flow_velocity.section.shortsubtitle";

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

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

    public static final String I18N_2YAXIS_LABEL =
        "chart.flow_velocity.section.yaxis.second.label";

    public static final String I18N_3YAXIS_LABEL =
        "chart.flow_velocity.section.yaxis.third.label";

    public static final String I18N_CHART_TITLE_DEFAULT  = "Geschwindigkeit- und Schubspannung";
    public static final String I18N_XAXIS_LABEL_DEFAULT  = "km";
    public static final String I18N_YAXIS_LABEL_DEFAULT  = "Geschwindigkeit v [m/s]";
    public static final String I18N_2YAXIS_LABEL_DEFAULT = "Schubspannung Tau [N]";
    public static final String I18N_3YAXIS_LABEL_DEFAULT = "Q [m³/s]";


    @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.V.idx) {
            label = getVAxisLabel();
        }
        else if (index == YAXIS.T.idx) {
            label = getTAxisLabel();
        }
        else if (index == YAXIS.Q.idx) {
            label = getQAxisLabel();
        }

        return label;
    }


    /**
     * Get internationalized label for the y axis.
     */
    protected String getVAxisLabel() {
        return msg(I18N_YAXIS_LABEL, I18N_YAXIS_LABEL_DEFAULT);
    }


    /**
     * Get internationalized label for the y axis.
     */
    protected String getQAxisLabel() {
        return msg(I18N_3YAXIS_LABEL, I18N_3YAXIS_LABEL_DEFAULT);
    }

    /**
     * Get internationalized label for the y axis.
     */
    protected String getTAxisLabel() {
        return msg(I18N_2YAXIS_LABEL, I18N_2YAXIS_LABEL_DEFAULT);
    }


    /**
     * Produce output.
     * @param artifactAndFacet current facet.
     * @param attr  theme for facet
     * @param visible Whether this facets data is actually visible or not.
     */
    public void doOut(
        ArtifactAndFacet artifactAndFacet,
        Document         attr,
        boolean          visible
    ) {
        String name = artifactAndFacet.getFacetName();

        logger.debug("FlowVelocityGenerator.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(FLOW_VELOCITY_MAINCHANNEL)) {
            doMainChannelOut(
                (FlowVelocityData) artifactAndFacet.getData(context),
                artifactAndFacet,
                attr,
                visible);
        }
        else if (name.equals(FLOW_VELOCITY_TOTALCHANNEL)) {
            doTotalChannelOut(
                (FlowVelocityData) artifactAndFacet.getData(context),
                artifactAndFacet,
                attr,
                visible);
        }
        else if (name.equals(FLOW_VELOCITY_DISCHARGE)) {
            doQOut(
                (FlowVelocityData) artifactAndFacet.getData(context),
                artifactAndFacet,
                attr,
                visible);
        }
        else if (name.equals(FLOW_VELOCITY_TAU)) {
            doTauOut(
                (FlowVelocityData) artifactAndFacet.getData(context),
                artifactAndFacet,
                attr,
                visible);
        }
        else if (name.equals(FLOW_VELOCITY_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.V.idx);
        }
        else if (name.equals(LONGITUDINAL_ANNOTATION)) {
            doAnnotations(
                (FLYSAnnotation) artifactAndFacet.getData(context),
                 artifactAndFacet,
                 attr,
                 visible);
        }
        else if (name.equals(FLOW_VELOCITY_MEASUREMENT)) {
            doVPointOut(
                 artifactAndFacet.getData(context),
                 artifactAndFacet,
                 attr,
                 visible);
        }
        else {
            logger.warn("Unknown facet name: " + name);
            return;
        }
    }


    /**
     * Process the output for W facets in a longitudinal section curve.
     *
     * @param data A FlowVelocityData object
     * @param aandf 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 doMainChannelOut(
        FlowVelocityData data,
        ArtifactAndFacet aandf,
        Document         theme,
        boolean          visible
    ) {
        logger.debug("FlowVelocityGenerator.doMainChannelOut");

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

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

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


    /** Handle VWQKms. */
    protected void doVPointOut (
        Object data,
        ArtifactAndFacet aandf,
        Document         theme,
        boolean          visible
    ) {
        logger.debug("FlowVelocityGenerator.doVPointOut");

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

        FlowVelocityMeasurementValue.FastFlowVelocityMeasurementValue
            value = (FlowVelocityMeasurementValue.FastFlowVelocityMeasurementValue)
                data;

        StyledSeriesBuilder.addPoints(series, new double[][] {{value.getStation()},{value.getV()}}, true);

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


    /**
     * Add items to dataseries which describes the differences.
     */
    protected void doTotalChannelOut(
        FlowVelocityData data,
        ArtifactAndFacet aandf,
        Document         theme,
        boolean          visible
    ) {
        logger.debug("FlowVelocityGenerator.doTotalChannelOut");

        if (data == null) {
            logger.warn("No data to add to FlowVelocity chart.");
            return;
         }

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

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

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



    /**
     * @param data A FlowVelocityData object
     * @param aandf 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 doQOut(
        FlowVelocityData data,
        ArtifactAndFacet aandf,
        Document         theme,
        boolean          visible
    ) {
        logger.debug("FlowVelocityGenerator.doTauOut");

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

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

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

    /**
     * @param data A FlowVelocityData object
     * @param aandf 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 doTauOut(
        FlowVelocityData data,
        ArtifactAndFacet aandf,
        Document         theme,
        boolean          visible
    ) {
        logger.debug("FlowVelocityGenerator.doTauOut");

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

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

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


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