package jalview.util;

import java.awt.event.ActionEvent;
import java.awt.RenderingHints;
import javax.imageio.ImageIO;
import org.jibble.epsgraphics.EpsGraphics2D;
import jalview.gui.EPSOptions;
import java.awt.Graphics2D;
import java.io.*;
import java.awt.image.BufferedImage;
import java.awt.Graphics;
import jalview.io.*;
import java.awt.*;


public class ImageMaker
{
  public static final int EPS = 0;
  public static final int PNG = 1;
  int type = -1;

  EpsGraphics2D pg;
  Graphics graphics;
  FileOutputStream out;
  BufferedImage bi;

  public ImageMaker(Component parent, int type, String title,
                           int width, int height, File file, String EPStitle)
  {
    this.type = type;

    if (file == null)
    {
      JalviewFileChooser chooser;
      chooser = type == EPS ? getEPSChooser() : getPNGChooser();

      chooser.setFileView(new jalview.io.JalviewFileView());
      chooser.setDialogTitle(title);
      chooser.setToolTipText("Save");

      int value = chooser.showSaveDialog(parent);

      if (value == jalview.io.JalviewFileChooser.APPROVE_OPTION)
      {
        jalview.bin.Cache.setProperty("LAST_DIRECTORY",
                                      chooser.getSelectedFile().getParent());

        file = chooser.getSelectedFile();
      }
    }

    if(file!=null)
    {
      try
      {
        out = new FileOutputStream(file);

        if (type == EPS)
          setupEPS(width, height, EPStitle);
        else
          setupPNG(width, height);
      }
      catch (Exception ex)
      {
        System.out.println("Error creating " + (type == EPS ? "EPS" : "PNG") +
                           " file.");
      }
    }
  }

  public Graphics getGraphics()
  {
    return graphics;
  }


  void setupPNG(int width, int height)
  {
        bi = new BufferedImage(width, height,
                BufferedImage.TYPE_INT_RGB);
        graphics  = bi.getGraphics();
        Graphics2D ig2 = (Graphics2D) graphics;
        ig2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                                 RenderingHints.VALUE_ANTIALIAS_ON);
  }

  public void writeImage()
  {
    try{
      switch(type)
      {
        case EPS:
          pg.flush();
          pg.close();
          break;
        case PNG:
          ImageIO.write(bi, "png", out);
          out.close();
          break;
      }
    }
    catch (Exception ex)
    {
        ex.printStackTrace();
    }
  }

  void setupEPS(int width, int height, String title)
  {
    boolean accurateText = true;

    String renderStyle = jalview.bin.Cache.getDefault("EPS_RENDERING",
        "Prompt each time");

    // If we need to prompt, and if the GUI is visible then
    // Prompt for EPS rendering style
    if (renderStyle.equalsIgnoreCase("Prompt each time")
        && !
        (System.getProperty("java.awt.headless") != null
         && System.getProperty("java.awt.headless").equals("true")))
    {
      EPSOptions eps = new EPSOptions();
      renderStyle = eps.getValue();

      if (renderStyle == null || eps.cancelled)
        return;
    }

    if (renderStyle.equalsIgnoreCase("text"))
    {
      accurateText = false;
    }

    try   {
      pg = new EpsGraphics2D(title, out, 0, 0, width,
                                           height);
      Graphics2D ig2 = (Graphics2D) pg;
      ig2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                           RenderingHints.VALUE_ANTIALIAS_ON);

      pg.setAccurateTextMode(accurateText);

      graphics = pg;
    }
    catch (Exception ex) {  }
  }


  JalviewFileChooser getPNGChooser()
  {
    return new jalview.io.JalviewFileChooser(jalview.bin.Cache.getProperty(
        "LAST_DIRECTORY"), new String[]
                                             {"png"},
                                             new String[]
                                             {"Portable network graphics"},
                                             "Portable network graphics");
  }

  JalviewFileChooser getEPSChooser()
  {
    return new jalview.io.JalviewFileChooser(jalview.bin.Cache.getProperty(
        "LAST_DIRECTORY"), new String[]
                                             {"eps"},
                                             new String[]
                                             {"Encapsulated Postscript"},
                                             "Encapsulated Postscript");
  }
}