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/*
 * Copyright (C) 2005-2024 ManyDesigns srl.  All rights reserved.
 * http://www.manydesigns.com/
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 3 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package com.manydesigns.portofino.chart;

import com.manydesigns.elements.ElementsThreadLocals;
import com.manydesigns.portofino.persistence.Persistence;
import com.manydesigns.portofino.persistence.QueryUtils;
import org.apache.commons.lang.StringUtils;
import org.hibernate.Session;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.DrawingSupplier;
import org.jfree.chart.plot.PiePlot;
import org.jfree.chart.title.LegendTitle;
import org.jfree.chart.title.TextTitle;
import org.jfree.chart.title.Title;
import org.jfree.chart.urls.PieURLGenerator;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.general.PieDataset;
import org.jfree.ui.HorizontalAlignment;
import org.jfree.ui.RectangleEdge;
import org.jfree.ui.RectangleInsets;
import org.jfree.ui.VerticalAlignment;

import java.awt.*;
import java.util.Locale;

/**
 * @author Paolo Predonzani     - [email protected]
 * @author Angelo Lupo          - [email protected]
 * @author Giampiero Granatella - [email protected]
 * @author Alessio Stalla       - [email protected]
 */
public abstract class Chart1DGenerator extends AbstractChartGenerator {
    public static final String copyright =
            "Copyright (C) 2005-2024 ManyDesigns srl";

    //**************************************************************************
    // Other objects
    //**************************************************************************
    private final Font titleFont = new Font("SansSerif", Font.BOLD, 12);
    private final Font legendFont = new Font("SansSerif", Font.BOLD, 10);
    private final Font legendItemFont = new Font("SansSerif", Font.PLAIN, 10);
    private final Color transparentColor = new Color(0, true);

    public JFreeChart generate(ChartDefinition chartDefinition, Persistence persistence, Locale locale) {
        DefaultPieDataset dataset = new DefaultPieDataset();
        java.util.List result;
        String query = chartDefinition.getQuery();
        Session session = persistence.getSession(chartDefinition.getDatabase());
        result = QueryUtils.runSql(session, query);
        for (Object[] current : result) {
            ComparableWrapper key = new ComparableWrapper((Comparable)current[0]);
            dataset.setValue(key, (Number)current[1]);
            if(current.length > 2) {
                key.setLabel(current[2].toString());
            }
        }

        JFreeChart chart = createChart(chartDefinition, dataset);

        chart.setAntiAlias(isAntiAlias());

        // impostiamo il bordo invisibile
        // eventualmente e' il css a fornirne uno
        // eventualmente e' il css a fornirne uno
        chart.setBorderVisible(isBorderVisible());
        chart.setBorderPaint(Color.lightGray);

        // impostiamo il titolo
        TextTitle title = chart.getTitle();
        title.setFont(titleFont);
        title.setMargin(10.0, 0.0, 0.0, 0.0);

        // ottieni il Plot
        PiePlot plot = (PiePlot) chart.getPlot();

        String urlExpression = chartDefinition.getUrlExpression();
        if(!StringUtils.isBlank(urlExpression)) {
            PieURLGenerator urlGenerator =
                    new ChartPieUrlGenerator(urlExpression);
            plot.setURLGenerator(urlGenerator);
        } else {
            plot.setURLGenerator(null);
        }


        // il plot ha sfondo e bordo trasparente
        // (quindi si vede il colore del chart)
        plot.setBackgroundPaint(transparentColor);
        plot.setOutlinePaint(transparentColor);

        //Modifico il toolTip
//        plot.setToolTipGenerator(new StandardPieToolTipGenerator("{0} = {1} ({2})"));

        // imposta la distanza delle etichette dal plot
        plot.setLabelGap(0.03);
//        plot.setLabelGenerator(new MyPieSectionLabelGenerator());

        // imposta il messaggio se non ci sono dati
        plot.setNoDataMessage(ElementsThreadLocals.getText("no.data.available"));

        plot.setCircular(true);

        plot.setBaseSectionOutlinePaint(Color.BLACK);

        DrawingSupplier supplier =
                new DesaturatedDrawingSupplier(plot.getDrawingSupplier());
        plot.setDrawingSupplier(supplier);

        // impostiamo il titolo della legenda
        String legendString = chartDefinition.getLegend();
        Title subtitle = new TextTitle(legendString, legendFont, Color.BLACK,
                RectangleEdge.BOTTOM, HorizontalAlignment.CENTER,
                VerticalAlignment.CENTER, new RectangleInsets(0, 0, 0, 0));
        subtitle.setMargin(0, 0, 5, 0);
        chart.addSubtitle(subtitle);

        // impostiamo la legenda
        LegendTitle legend = chart.getLegend();
        legend.setBorder(0, 0, 0, 0);
        legend.setItemFont(legendItemFont);
        int legendMargin = 10;
        legend.setMargin(0.0, legendMargin, legendMargin, legendMargin);
        legend.setBackgroundPaint(transparentColor);

        // impostiamo un gradiente orizzontale
        Paint chartBgPaint = new GradientPaint(0, 0, new Color(255, 253, 240),
                0, getHeight(), Color.WHITE);
        chart.setBackgroundPaint(chartBgPaint);
        return chart;
    }

    protected abstract JFreeChart createChart(ChartDefinition chartDefinition, PieDataset dataset);


}