package com.aws3.ebenradio.view.custom_views;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;

import com.bumptech.glide.Glide;
import com.bumptech.glide.load.engine.Resource;
import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
import com.bumptech.glide.load.resource.bitmap.BitmapResource;
import com.squareup.picasso.Transformation;


public class BlurTransformationV2 implements com.bumptech.glide.load.Transformation<Bitmap> {

    private static int MAX_RADIUS = 15;
    private static int DEFAULT_DOWN_SAMPLING = 1;

    private Context mContext;

    private int mRadius;
    private int mSampling;

    private BitmapPool bitmapPool;

    public BlurTransformationV2(Context context) {
        this(context, MAX_RADIUS, DEFAULT_DOWN_SAMPLING);
    }

    public BlurTransformationV2(Context context, int radius) {
        this(context, radius, DEFAULT_DOWN_SAMPLING);
    }

    public BlurTransformationV2(Context context, int radius, int sampling) {
        mContext = context.getApplicationContext();
        mRadius = radius;
        bitmapPool = Glide.get(context).getBitmapPool();
        mSampling = sampling;
    }

    @Override
    public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {

        Bitmap source = resource.get();
                int scaledWidth = source.getWidth() / mSampling;
        int scaledHeight = source.getHeight() / mSampling;

        Bitmap bitmap = Bitmap.createBitmap(scaledWidth, scaledHeight, Bitmap.Config.ARGB_8888);

        Canvas canvas = new Canvas(bitmap);
        canvas.scale(1 / (float) mSampling, 1 / (float) mSampling);
        Paint paint = new Paint();
        paint.setFlags(Paint.FILTER_BITMAP_FLAG);
        canvas.drawBitmap(source, 0, 0, paint);
        bitmap = RSBlurV2.blurBitmap(bitmap, mRadius, mContext);
        source.recycle();

        return BitmapResource.obtain(bitmap,  bitmapPool);
    }

    @Override
    public String getId() {
        return "BlurTransformation(radius=" + mRadius + ", sampling=" + mSampling + ")";
    }

}