package nl.tudelft.simulation.dsol.swing.charts.boxwhisker;
   
   import java.awt.Color;
   import java.awt.Font;
   import java.awt.Graphics2D;
   import java.awt.font.FontRenderContext;
   import java.awt.geom.Point2D;
   import java.awt.geom.Rectangle2D;
   import java.text.NumberFormat;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.djutils.event.Event;
  import org.djutils.event.EventListener;
  import org.djutils.event.reference.ReferenceType;
  import org.djutils.stats.summarizers.Tally;
  import org.djutils.stats.summarizers.TallyStatistic;
  import org.djutils.stats.summarizers.WeightedTally;
  import org.djutils.stats.summarizers.event.EventBasedTally;
  import org.djutils.stats.summarizers.event.EventBasedTimestampWeightedTally;
  import org.djutils.stats.summarizers.event.EventBasedWeightedTally;
  import org.djutils.stats.summarizers.event.StatisticsEvents;
  import org.jfree.chart.event.PlotChangeEvent;
  import org.jfree.chart.plot.Plot;
  import org.jfree.chart.plot.PlotRenderingInfo;
  import org.jfree.chart.plot.PlotState;
  
  /**
   * The Summary chart class defines a summary chart..
   * <p>
   * Copyright (c) 2002-2025 Delft University of Technology, Jaffalaan 5, 2628 BX Delft, the Netherlands. All rights reserved. See
   * for project information <a href="https://simulation.tudelft.nl/dsol/manual/" target="_blank">DSOL Manual</a>. The DSOL
   * project is distributed under a three-clause BSD-style license, which can be found at
   * <a href="https://simulation.tudelft.nl/dsol/docs/latest/license.html" target="_blank">DSOL License</a>.
   * </p>
   * @author <a href="https://www.linkedin.com/in/peterhmjacobs">Peter Jacobs </a>
   * @author <a href="mailto:a.verbraeck@tudelft.nl"> Alexander Verbraeck </a>
   */
  public class BoxAndWhiskerPlot extends Plot implements EventListener
  {
      /** serialversionUId. */
      private static final long serialVersionUID = 1L;
  
      /** BORDER_SIZE refers to the width of the border on the panel. */
      public static final short BORDER_SIZE = 50;
  
      /** PLOT_TYPE refers to the plot type. */
      public static final String PLOT_TYPE = "SUMMARY_PLOT";
  
      /** FONT defines the font of the plot. */
      public static final Font FONT = new Font("SansSerif", Font.PLAIN, 10);
  
      /** TITLE_FONT defines the font of the plot. */
      public static final Font TITLE_FONT = new Font("SansSerif", Font.BOLD, 15);
  
      /** target is the tally to represent. */
      protected List<TallyStatistic> tallies = new ArrayList<>();
  
      /** formatter formats the text. */
      protected NumberFormat formatter = NumberFormat.getInstance();
  
      /** the confidenceInterval. */
      protected double confidenceInterval = 0.05;
  
      /**
       * constructs a new BoxAndWhiskerPlot.
       */
      public BoxAndWhiskerPlot()
      {
          super();
      }
  
      /**
       * adds a tally to the array of targets.
       * @param tally the tally to be summarized
       */
      public synchronized void add(final EventBasedTally tally)
      {
          tally.addListener(this, StatisticsEvents.SAMPLE_MEAN_EVENT, ReferenceType.STRONG);
          this.tallies.add(tally);
      }
  
      /**
       * adds a tally to the array of targets.
       * @param tally the tally to be summarized
       */
      public synchronized void add(final EventBasedWeightedTally tally)
      {
          tally.addListener(this, StatisticsEvents.WEIGHTED_SAMPLE_MEAN_EVENT, ReferenceType.STRONG);
          this.tallies.add(tally);
      }
  
      /**
       * adds a tally to the array of targets.
       * @param tally the tally to be summarized
       */
      public synchronized void add(final EventBasedTimestampWeightedTally tally)
      {
          tally.addListener(this, StatisticsEvents.TIMED_WEIGHTED_SAMPLE_MEAN_EVENT, ReferenceType.STRONG);
         this.tallies.add(tally);
     }
 
     @Override
     public String getPlotType()
     {
         return PLOT_TYPE;
     }
 
     @Override
     public void notify(final Event event)
     {
         this.notifyListeners(new PlotChangeEvent(this));
     }
 
     /** ************ PRIVATE METHODS *********************** */
 
     /**
      * computes the extent of the targets.
      * @param tallies the range of tallies
      * @return double[min,max]
      */
     private static double[] extent(final List<TallyStatistic> tallies)
     {
         double[] result = {Double.MAX_VALUE, -Double.MAX_VALUE};
         for (int i = 0; i < tallies.size(); i++)
         {
             if (tallies.get(i).getMin() < result[0])
             {
                 result[0] = tallies.get(i).getMin();
             }
             if (tallies.get(i).getMax() > result[1])
             {
                 result[1] = tallies.get(i).getMax();
             }
         }
         return result;
     }
 
     /**
      * determines the borders on the left and right side of the tally.
      * @param g2 the graphics object
      * @param context the context
      * @param tallyList tallies
      * @return double[] the extent
      */
     private double[] borders(final Graphics2D g2, final FontRenderContext context, final List<TallyStatistic> tallyList)
     {
         double[] result = {0, 0};
         for (int i = 0; i < tallyList.size(); i++)
         {
             double left = g2.getFont().getStringBounds(this.formatter.format(tallyList.get(i).getMin()), context).getWidth();
             double rigth = g2.getFont().getStringBounds(this.formatter.format(tallyList.get(i).getMax()), context).getWidth();
             if (left > result[0])
             {
                 result[0] = left;
             }
             if (rigth > result[1])
             {
                 result[1] = rigth;
             }
         }
         result[0] = result[0] + 3;
         result[1] = result[1] + 3;
         return result;
     }
 
     /**
      * returns the bounding box.
      * @param word the word
      * @param context the context
      * @return Rectangle2D the bounds
      */
     private Rectangle2D getBounds(final String word, final FontRenderContext context)
     {
         return FONT.getStringBounds(word, context);
     }
 
     /**
      * fills a rectangle.
      * @param g2 the graphics object
      * @param rectangle the area
      * @param color the color
      */
     private void fillRectangle(final Graphics2D g2, final Rectangle2D rectangle, final Color color)
     {
         g2.setColor(color);
         g2.fillRect((int) rectangle.getX(), (int) rectangle.getY(), (int) rectangle.getWidth(), (int) rectangle.getHeight());
     }
 
     /**
      * paints a tally.
      * @param g2 the graphics object
      * @param rectangle the rectangle on which to paint
      * @param tally the tally
      * @param leftX the lowest real value
      * @param leftBorder the left border
      * @param scale the scale
      */
     private void paintTally(final Graphics2D g2, final Rectangle2D rectangle, final TallyStatistic tally, final double leftX,
             final double leftBorder, final double scale)
     {
         this.fillRectangle(g2, rectangle, Color.WHITE);
         g2.setColor(Color.BLACK);
         g2.setFont(TITLE_FONT);
         g2.drawString(tally.getDescription(),
                 (int) Math.round(leftBorder + 0.5 * (rectangle.getWidth() - leftBorder - 20)
                         - 0.5 * this.getBounds(tally.getDescription(), g2.getFontRenderContext()).getWidth()),
                 25 + (int) rectangle.getY());
         g2.setFont(FONT);
         g2.drawRect((int) rectangle.getX() - 1, (int) rectangle.getY() - 1, (int) rectangle.getWidth() + 2,
                 (int) rectangle.getHeight() + 2);
         int tallyMin = (int) Math.round(rectangle.getX() + (tally.getMin() - leftX) * scale + leftBorder);
         int tallyMax = (int) Math.round(rectangle.getX() + (tally.getMax() - leftX) * scale + leftBorder);
         int middle = (int) Math.round(rectangle.getY() + 0.5 * rectangle.getHeight());
         String label = this.formatter.format(tally.getMin());
         g2.drawString(label, (int) Math.round(tallyMin - 3 - this.getBounds(label, g2.getFontRenderContext()).getWidth()),
                 (int) Math.round(middle + 0.5 * this.getBounds(label, g2.getFontRenderContext()).getHeight()));
         label = this.formatter.format(tally.getMax());
         g2.drawString(label, tallyMax + 3,
                 (int) Math.round(middle + 0.5 * this.getBounds(label, g2.getFontRenderContext()).getHeight()));
         g2.drawLine(tallyMin, middle + 6, tallyMin, middle - 6);
         g2.drawLine(tallyMin, middle, tallyMax, middle);
         g2.drawLine(tallyMax, middle + 6, tallyMax, middle - 6);
         if (tally instanceof Tally) // EventBasedTally extends Tally
         {
             Tally unweightedTally = (Tally) tally;
             double[] confidence = unweightedTally.getConfidenceInterval(this.confidenceInterval);
             int middleX = (int) Math.round((unweightedTally.getSampleMean() - leftX) * scale + tallyMin);
             g2.fillRect(middleX, middle - 6, 2, 12);
             label = this.formatter.format(unweightedTally.getSampleMean());
             Rectangle2D bounds = this.getBounds(label, g2.getFontRenderContext());
             g2.drawString(label, (int) Math.round(middleX - 0.5 * bounds.getWidth()), Math.round(middle - 8));
             if (confidence != null)
             {
                 int confX = (int) Math.round((confidence[0] - leftX) * scale + tallyMin);
                 int confWidth = (int) Math.round((confidence[1] - confidence[0]) * scale);
                 g2.fillRect(confX, middle - 2, confWidth, 4);
                 label = this.formatter.format(confidence[0]);
                 bounds = this.getBounds(label, g2.getFontRenderContext());
                 g2.drawString(label, (int) Math.round(confX - bounds.getWidth()),
                         (int) Math.round(middle + 8 + bounds.getHeight()));
                 label = this.formatter.format(confidence[1]);
                 bounds = this.getBounds(label, g2.getFontRenderContext());
                 g2.drawString(label, Math.round(confX + confWidth), (int) Math.round(middle + 8 + bounds.getHeight()));
             }
         }
         else if (tally instanceof WeightedTally) // EventBasedWeightedTally and Timestamp classes extend WeightedTally
         {
             WeightedTally weightedTally = (WeightedTally) tally;
             int middleX = (int) Math.round((weightedTally.getWeightedSampleMean() - leftX) * scale + tallyMin);
             g2.fillRect(middleX, middle - 6, 2, 12);
             label = this.formatter.format(weightedTally.getWeightedSampleMean());
             Rectangle2D bounds = this.getBounds(label, g2.getFontRenderContext());
             g2.drawString(label, (int) Math.round(middleX - 0.5 * bounds.getWidth()), Math.round(middle - 8));
         }
     }
 
     @Override
     public void draw(final Graphics2D g2, final Rectangle2D rectangle, final Point2D point, final PlotState plotState,
             final PlotRenderingInfo plotRenderingInfo)
     {
         g2.setBackground(Color.WHITE);
         double height = Math.min(rectangle.getHeight() / this.tallies.size() * 1.0, rectangle.getHeight());
         double[] extent = BoxAndWhiskerPlot.extent(this.tallies);
         double[] border = this.borders(g2, g2.getFontRenderContext(), this.tallies);
         double scale = (0.85 * rectangle.getWidth() - 10 - border[0] - border[1]) / ((extent[1] - extent[0]) * 1.0);
         for (int i = 0; i < this.tallies.size(); i++)
         {
             g2.setFont(FONT);
             Rectangle2D area = new Rectangle2D.Double(rectangle.getX() + 0.15 * rectangle.getWidth(),
                     rectangle.getY() + i * height + 3, 0.85 * rectangle.getWidth() - 10, 0.75 * height - 3);
             this.paintTally(g2, area, this.tallies.get(i), extent[0], border[0], scale);
         }
     }
 
     /**
      * Returns the confidence interval of the BoxAndWhiskerPlot.
      * @return the confidence interval of the BoxAndWhiskerPlot
      */
     public double getConfidenceInterval()
     {
         return this.confidenceInterval;
     }
 
     /**
      * sets the confidence interval of the plot. The default value = 0.05 (=5%)
      * @param confidenceInterval the confidence interval
      */
     public void setConfidenceInterval(final double confidenceInterval)
     {
         this.confidenceInterval = confidenceInterval;
     }
 
 }