package dk.thoerup.side9;

import java.io.File;
import java.io.FileOutputStream;
import java.io.FilenameFilter;
import java.io.IOException;
import java.util.ArrayList;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Bitmap.CompressFormat;
import android.net.Uri;
import android.os.Environment;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.Toast;

public class ImageAdapter extends BaseAdapter {
    //int mGalleryItemBackground;
    private Context mContext;
    
    ArrayList<String> mBitmapPaths = new ArrayList<String>();
    ArrayList<Bitmap> mBitmaps = new ArrayList<Bitmap>();
    
    int size;

    public ImageAdapter(Context c) {
        mContext = c;
        
        String path = Environment.getExternalStorageDirectory().getPath() + "/Side9" ;
        
        
        
        File root = new File(path);
        
        if (root.exists() == false) {
        	Toast.makeText(mContext, "Side9 folder not found on sdcard", Toast.LENGTH_LONG).show();
        	return;
        } 

        File files[] = root.listFiles( new ExtensionFilter("jpg") );
        

        String thumbPath =  path + "/.thumb/";
        
        File thumbDir = new File(thumbPath);
        if (! thumbDir.exists()) {
        	thumbDir.mkdirs();
        }
        
        
        for (File f : files) {

        	String fileName = f.getName();
        	File thumb = new File ( thumbPath + fileName );
        	
        	if (! thumb.exists()) {
        		Bitmap bmp = BitmapFactory.decodeFile( f.getPath() );
        		Bitmap scaled =  Bitmap.createScaledBitmap(bmp, bmp.getWidth()/4, bmp.getHeight()/4, true);
        		mBitmaps.add(scaled);
        		try {
        			FileOutputStream fos = new FileOutputStream(thumb);
        			scaled.compress(CompressFormat.JPEG, 90, fos);        			
        			
        		} catch (IOException e) {
        			Log.e("Side9", "error", e);
        		}
        		
        	} else {
        		Bitmap thumbBmp = BitmapFactory.decodeFile( thumb.getPath());
        		mBitmaps.add(thumbBmp);
        	}
			mBitmapPaths.add(  f.getPath() );            
        	
        }
        
        size = getSize();
    }

    public int getCount() {
        return mBitmapPaths.size();
    }

    public Object getItem(int position) {
        return position;
    }

    public long getItemId(int position) {
        return position;
    }
    
    public String getImagePath(int position) {
    	return mBitmapPaths.get(position);
    }
    
    public ArrayList<String> getImagePaths() {
    	return mBitmapPaths;
    }
    
    private int getSize() {
		 DisplayMetrics metrics = new DisplayMetrics();
		 WindowManager wmgr = (WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE);
		 wmgr.getDefaultDisplay().getMetrics(metrics);
		 if (metrics.widthPixels < 480) {
			 return 150;
		 } else {
			 return 200;
		 }
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView imageView;
        if (convertView == null) {  // if it's not recycled, initialize some attributes
            imageView = new ImageView(mContext);
            imageView.setLayoutParams(new GridView.LayoutParams(size, size));
            imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            imageView.setAdjustViewBounds(true);   
            imageView.setPadding(4, 4, 4, 4);
        } else {
            imageView = (ImageView) convertView;
        }

        //imageView.setImageURI(  Uri.parse(mThumbPaths.get(position)) );
        imageView.setImageBitmap( mBitmaps.get(position) );
        return imageView;
    }
    
    class ExtensionFilter implements FilenameFilter {
    	private String mExt;
    	public ExtensionFilter(String ext) {
    		mExt = ext;
    	}

		@Override
		public boolean accept(File dir, String filename) {
			String parts[] = filename.split("\\.");
			if (parts.length > 1) {
				String ext = parts[ parts.length -1];
				if (ext.equals(mExt)) {
					return true;
				}
			}
			return false;
		}
    	
    }
}