package cc.glsn.v15.moviemenu;

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.TreeMap;

import javax.swing.JPanel;

public class ImageLoader
{
    TreeMap<File,BufferedImage> Cache;
    BufferedImage Line;
    
    public ImageLoader()
    {
        clearCache();
    }
    
    public void clearCache()
    {
        Cache=new TreeMap<File,BufferedImage>();
        
    }
    
    private BufferedImage getImage(File F)
    {
        if (!Cache.containsKey(F))
        {
            try
            {
                //System.out.println("Reading image: " + F);
                BufferedImage SourceImg;
                SourceImg=javax.imageio.ImageIO.read(F);
                
                double Width=SourceImg.getWidth();
                double Height=SourceImg.getHeight();
                double Ratio=Width/Height;
                double ScaledWidth=MovieMenu.ImageHeight * Ratio;
                int ScaledW=new Long(Math.round(ScaledWidth)).intValue();
                
                
                
                BufferedImage ScaledImage;
                
                ScaledImage=new BufferedImage(ScaledW,MovieMenu.ImageHeight,BufferedImage.TYPE_4BYTE_ABGR);
                ScaledImage.getGraphics().drawImage(SourceImg,0,0,ScaledW-1,MovieMenu.ImageHeight-1,
                                                    0,0,SourceImg.getWidth()-1,SourceImg.getHeight()-1,null);
                Cache.put(F,ScaledImage);
                return ScaledImage;
                
            }
            catch (IOException e)
            {
                System.out.println("Error reading file: " + F);
                e.printStackTrace();
            }
        }
        
        
        return Cache.get(F);
        
        
    }
    
    ImagePanel getImageComponent(File F)
    {
        BufferedImage I=getImage(F);
        if (I!=null) return new ImagePanel(I);
        
        
        return null;
    }
    
    ImagePanel getLine()
    {
        if (Line==null) Line=new BufferedImage(MovieMenu.ItemWidth,1,BufferedImage.TYPE_4BYTE_ABGR);
        
        return new ImagePanel(Line);
        
    }
    
    class ImagePanel extends JPanel
    {
        BufferedImage ScaledImage;

        private static final long serialVersionUID = -3064364031317747695L;
        
        public ImagePanel(BufferedImage I)
        {
            ScaledImage=I;
            
        }
        
        public ImagePanel(File F) throws IOException
        {
            
            
        }

        protected synchronized void paintComponent(Graphics g)
        {
            Graphics2D g2=(Graphics2D)g;
            Rectangle R=g.getClip().getBounds();
            
            g2.drawImage(ScaledImage,R.x,R.y,R.x+R.width,R.y+R.height,R.x,R.y,R.x+R.width,R.y+R.height,null);
            
        }
        /** Used by some layout managers */
        public Dimension getMaximumSize()
        {
            return getPreferredSize();
        }

        /** Used by some layout managers */
        public Dimension getMinimumSize()
        {
            return getPreferredSize();
        }

        /** Used by some layout managers */
        public Dimension getPreferredSize()
        {
            return new Dimension(ScaledImage.getWidth(),ScaledImage.getHeight());
        }  
        
        
    }
    
    
}