package com.stfo.app.breakingeven;

import android.content.res.AssetManager;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Typeface;
import android.media.ThumbnailUtils;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.DisplayMetrics;
import android.util.Log;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import java.lang.ref.WeakReference;

/**
 * Created by kartik on 28/02/15.
 */
public class HomeScreen extends ActionBarActivity{

    ImageView iV;
    int height,width;
    TextView tv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.adventure_fragment);
        iV = (ImageView) findViewById(R.id.imageView_adventure_home_screen_fragment);
        tv = (TextView) findViewById(R.id.textView_adventure_name_home_screen_fragment);
        Typeface typeface = Typeface.createFromAsset(getAssets(),"RobotoCondensed-Bold.ttf");
        tv.setTypeface(typeface);
        tv.setText("demooo");

        DisplayMetrics disp = getApplicationContext().getResources().getDisplayMetrics();
        int density = disp.densityDpi;
        width = disp.widthPixels;
        height = (int)((float)(200.0/160.0) * (float)density);

        Bitmap b =decodeSampledBitmapFromResource(getResources(),R.drawable.shake,height);
        loadBitmap(R.drawable.shake,iV);

    }

    public void loadBitmap(int resId, ImageView imageView) {
        BitmapWorkerTask task = new BitmapWorkerTask(imageView);
        task.execute(resId);
    }

    public static Bitmap decodeSampledBitmapFromResource(Resources res, int resId,
                                                          int reqHeight) {

        // First decode with inJustDecodeBounds=true to check dimensions
        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeResource(res, resId, options);

        // Calculate inSampleSize
        options.inSampleSize = calculateInSampleSize(options , reqHeight);

        // Decode bitmap with inSampleSize set
        options.inJustDecodeBounds = false;
        return BitmapFactory.decodeResource(res, resId, options);
    }

    public static int calculateInSampleSize(BitmapFactory.Options options, int reqHeight)
    {
        final int height = options.outHeight;
        int inSampleSize = 1;

        if (height > reqHeight ) {

            final int halfHeight = height / 2;

            // Calculate the largest inSampleSize value that is a power of 2 and keeps both
            // height and width larger than the requested height and width.
            while ((halfHeight / inSampleSize) > reqHeight) {
                inSampleSize *= 2;
            }
        }

        return inSampleSize;
    }

    class BitmapWorkerTask extends AsyncTask<Integer, Void, Bitmap> {
        private final WeakReference<ImageView> imageViewReference;
        private int data = 0;

        public BitmapWorkerTask(ImageView imageView) {
            // Use a WeakReference to ensure the ImageView can be garbage collected
            imageViewReference = new WeakReference<ImageView>(imageView);
        }

        // Decode image in background.
        @Override
        protected Bitmap doInBackground(Integer... params) {
            data = params[0];
            return decodeSampledBitmapFromResource(getResources(), data, height);
        }

        // Once complete, see if ImageView is still around and set bitmap.
        @Override
        protected void onPostExecute(Bitmap bitmap) {
            if (imageViewReference != null && bitmap != null) {
                final ImageView imageView = imageViewReference.get();
                if (imageView != null) {
                    imageView.setImageBitmap(ThumbnailUtils.extractThumbnail(bitmap,width,height));
                }
            }
        }
    }
}