package nextrek.adapters;

import nextrek.widgets.VList;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.BitmapFactory;
import android.graphics.BitmapFactory.Options;
import android.graphics.drawable.BitmapDrawable;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;

public class TileAdapter extends BaseAdapter {

    private Resources resources;
    private String packageName;
    
    private int PAGE_WIDTH;
    private int PAGE_HEIGHT;
    private int PAGES;
    
    private String PREFIX;

    public TileAdapter(Context context, int pageWidth, int pageHeight, int pages, String prefix) {
        resources = context.getResources();
        packageName = context.getPackageName();
        PAGE_WIDTH = pageWidth;
        PAGE_HEIGHT = pageHeight;
        PAGES = pages;
        PREFIX = prefix;
    }

    @Override
    public int getCount() {
        return PAGES;
    }

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

    @Override
    public long getItemId(int position) {
        return position;
    }
    
    

    @Override
    public boolean areAllItemsEnabled() {
        return false;
    }

    @Override
    public int getItemViewType(int position) {
        return 0;
    }

    @Override
    public int getViewTypeCount() {
        return 1;
    }

    @Override
    public boolean hasStableIds() {
        return true;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        //Integer pos = position;
        //System.out.println("TileAdapter: getView "+pos);
        
        ImageView image;
        AbsListView.LayoutParams params;

        int targetWidth = VList.screenWidth;
        int targetHeight = (PAGE_HEIGHT * targetWidth) / PAGE_WIDTH;

        boolean updateLayout = true;

        String baseName = PREFIX + ((position < 10) ? "0" : "") + position;

        if (convertView == null) {
            image = new ImageView(parent.getContext());
            params = new AbsListView.LayoutParams(targetWidth, targetHeight);
            
            //image.setBackgroundColor(0xFFFFFFFF);
            
            image.setFocusable(false);
            image.setFocusableInTouchMode(false);
            image.setClickable(false);
            
            image.setDrawingCacheEnabled(false);
            image.destroyDrawingCache();
            image.setScaleType(ScaleType.FIT_XY);

            convertView = image;

        } else {
            image = (ImageView) convertView;

            params = (AbsListView.LayoutParams) image.getLayoutParams();

            if ((targetWidth != params.width) || (targetHeight != params.height)) {
                params.width = targetWidth;
                params.height = targetHeight;
            } else {
                updateLayout = false;
            }

        }

        if (updateLayout) {
            image.setLayoutParams(params);
            // image.requestLayout();
        }

        Integer drawable0 = resources.getIdentifier(baseName, "drawable", packageName);
        
        synchronized (image) {
            
            Integer lastUrl = (Integer)image.getTag();
            
            if ((lastUrl == null) || (lastUrl.intValue() != drawable0.intValue())) {
                //System.out.println("Pos: " + position + " draw: " + drawable0);
                image.setTag(drawable0);
                
                BitmapDrawable drawable = null;
                Bitmap bitmap = null;
                try {
                    Options ops = new Options();
                    ops.inDither = false;
                    ops.inPreferredConfig = Config.RGB_565;
                    ops.inSampleSize = 1;
                    ops.inInputShareable = false;
                    ops.inPurgeable = true;
                    ops.inScaled = false;
                    bitmap = BitmapFactory.decodeResource(resources, drawable0, ops);
                    
                    //System.out.println("decoded: "+drawable0+" "+ops.outWidth + " " + Debug.getNativeHeapAllocatedSize());
                } catch (Exception e) {
                    e.printStackTrace();
                }
                if (bitmap != null) {
                    drawable = new BitmapDrawable(bitmap);
                }
                
                image.setImageDrawable(drawable);
            }
        }
        
        return convertView;
    }
}