package de.intevation.gnv.chart;

import java.awt.Color;
import java.text.NumberFormat;
import java.util.Collection;
import java.util.Iterator;
import java.util.Locale;

import org.apache.log4j.Logger;

import org.jfree.chart.JFreeChart;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.axis.Axis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.NumberTickUnit;
import org.jfree.chart.axis.AxisLocation;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.StandardXYItemRenderer;
import org.jfree.data.general.Series;

import de.intevation.gnv.geobackend.base.Result;
import de.intevation.gnv.transition.describedata.KeyValueDescibeData;

/**
 * @author Ingo Weinzierl <ingo.weinzierl@intevation.de>
 */
public abstract class AbstractXYLineChart
extends               AbstractChart
{
    private static Logger log    = Logger.getLogger(AbstractXYLineChart.class);

    protected static Color[] COLOR = {
        Color.black, Color.red, Color.green, Color.blue
    };

    protected PlotOrientation PLOT_ORIENTATION = PlotOrientation.VERTICAL;

    protected abstract void initData();
    protected abstract void addValue(Result row, Series series);
    protected abstract void addSeries(Series series, int idx);
    protected abstract void localizeDomainAxis(Axis axis, Locale locale);
    protected abstract String createSeriesName(
        String breakPoint1,
        String breakPoint2,
        String breakPoint3
    );


    public JFreeChart generateChart() {
        log.debug("generate XYLineChart");

        if (chart != null)
            return chart;

        chart = ChartFactory.createXYLineChart(
            labels.getTitle(),
            labels.getDomainAxisLabel(),
            null,
            null,
            PLOT_ORIENTATION,
            true,
            false,
            false
        );

        theme.apply(chart);
        initData();

        return chart;
    }


    protected void prepareAxis(String seriesKey, int idx) {
        log.debug("prepare axis of xychart");

        XYPlot plot      = chart.getXYPlot();
        Axis xAxis       = plot.getDomainAxis();
        NumberAxis yAxis = new NumberAxis(seriesKey);

        localizeDomainAxis(xAxis, locale);
        localizeRangeAxis(yAxis, locale);

        if (seriesKey.contains("richtung")) {
            yAxis.setTickUnit(new NumberTickUnit(30.0));
            yAxis.setUpperBound(360.0);
            yAxis.setLowerBound(0.0);
            plot.setRangeAxis(idx, yAxis);
        }
        else {
            yAxis.setFixedDimension(10.0);
            yAxis.setAutoRangeIncludesZero(false);
            plot.setRangeAxis(idx, yAxis);
            yAxis.configure();
        }

        if (idx % 2 != 0)
            plot.setRangeAxisLocation(idx, AxisLocation.BOTTOM_OR_RIGHT);
        else
            plot.setRangeAxisLocation(idx, AxisLocation.BOTTOM_OR_LEFT);
        plot.mapDatasetToRangeAxis(idx, idx);

        StandardXYItemRenderer renderer = new StandardXYItemRenderer();
        renderer.setSeriesPaint(idx, COLOR[idx%COLOR.length]);
        plot.setRenderer(idx, renderer);
    }


    protected void localizeRangeAxis(Axis axis, Locale locale) {
        if (locale == null)
            return;

        log.debug(
            "Set language of axis [" + axis.getLabel() + "] " +
            "to " + locale.toString()
        );

        NumberFormat format = NumberFormat.getInstance(locale);
        ((NumberAxis) axis).setNumberFormatOverride(format);
    }


    protected String findValueTitle(Collection values, String id) {
        log.debug("find description of dataset");

        if (values != null){
            Iterator it = values.iterator();
            while (it.hasNext()) {
                KeyValueDescibeData data = (KeyValueDescibeData) it.next();

                if (id.equals(data.getKey()))
                    return data.getValue();
            }
        }
        return "";
    }
}
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