/**
 * Author: Mario Velasco Casquero
 * Date: 08/09/2015
 * Email: m3ario@gmail.com
 */
public class ImagePicker {

    private static final int DEFAULT_MIN_WIDTH_QUALITY = 400;        // min pixels
    private static final String TAG = "ImagePicker";
    private static final String TEMP_IMAGE_NAME = "tempImage";

    public static int minWidthQuality = DEFAULT_MIN_WIDTH_QUALITY;


    public static Intent getPickImageIntent(Context context) {
        Intent chooserIntent = null;

        List<Intent> intentList = new ArrayList<>();

        Intent pickIntent = new Intent(Intent.ACTION_PICK,
                android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
        Intent takePhotoIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        takePhotoIntent.putExtra("return-data", true);
        takePhotoIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(getTempFile(context)));
        intentList = addIntentsToList(context, intentList, pickIntent);
        intentList = addIntentsToList(context, intentList, takePhotoIntent);

        if (intentList.size() > 0) {
            chooserIntent = Intent.createChooser(intentList.remove(intentList.size() -1),
                    context.getString(R.string.pick_image_intent_text));
            chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, intentList.toArray(new Parcelable[]{}));
        }

        return chooserIntent;
    }

    private static List<Intent> addIntentsToList(Context context, List<Intent> list, Intent intent) {
        List<ResolveInfo> resInfo = context.getPackageManager().queryIntentActivities(intent, 0);
        for (ResolveInfo resolveInfo : resInfo) {
            String packageName = resolveInfo.activityInfo.packageName;
            Intent targetedIntent = new Intent(intent);
            targetedIntent.setPackage(packageName);
            list.add(targetedIntent);
            Log.d(TAG, "Intent: " + intent.getAction() + " package: " + packageName);
        }
        return list;
    }


    public static Bitmap getImageFromResult(Context context, int resultCode,
                                            Intent imageReturnedIntent) {
        Log.d(TAG, "getImageFromResult, resultCode: " + resultCode);
        Bitmap bm = null;
        File imageFile = getTempFile(context);
        if (resultCode == Activity.RESULT_OK) {
            Uri selectedImage;
            if (imageReturnedIntent == null) {     /** CAMERA **/
                selectedImage = Uri.fromFile(imageFile);
            } else {                                 /** ALBUM **/
                selectedImage = imageReturnedIntent.getData();
            }
            Log.d(TAG, "selectedImage: " + selectedImage);

            bm = getImageResized(context, selectedImage);
            if (isCamera) {
                bm = rotateIfNeeded(context, bm, imageFile);
            }
        }
        return bm;
    }


    private static File getTempFile(Context context) {
        File imageFile = new File(context.getExternalCacheDir(), TEMP_IMAGE_NAME);
        imageFile.getParentFile().mkdirs();
        return imageFile;
    }

    private static Bitmap decodeBitmap(Context context, Uri theUri, int sampleSize) {
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inSampleSize = sampleSize;

        AssetFileDescriptor fileDescriptor = null;
        try {
            fileDescriptor = context.getContentResolver().openAssetFileDescriptor(theUri, "r");
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }

        Bitmap actuallyUsableBitmap = BitmapFactory.decodeFileDescriptor(
                fileDescriptor.getFileDescriptor(), null, options);

        Log.d(TAG, options.inSampleSize + " sample method bitmap ... " +
                actuallyUsableBitmap.getWidth() + " " + actuallyUsableBitmap.getHeight());

        return actuallyUsableBitmap;
    }

    private static Bitmap getImageResized(Context context, Uri selectedImage) {
        Bitmap bm = null;
        int sampleSize = 7; // TODO improve resizer
        do {
            sampleSize -= 2;
            bm = decodeBitmap(context, selectedImage, sampleSize);
            Log.d(TAG, "resizer: new bitmap width = " + bm.getWidth());
        } while (bm.getWidth() < minWidthQuality && sampleSize > 1);
        return bm;
    }

    private static Bitmap rotateIfNeeded(Context context, Bitmap bm, File imageFile) {
        int rot = getCameraPhotoOrientation(context, imageFile);
        if (rot != 0) {
            bm = new RotateOrientation().RotateOrientationCall(bm, rot);
        }
//        saveBitmap(imageFile, bm);
        return bm;
    }

//    private static void saveBitmap(File imageFile, Bitmap bm) {
//        Log.d(TAG, "Saving image ... ");
//        imageFile.getParentFile().mkdirs();
//        FileOutputStream out = null;
//        try {
//            out = new FileOutputStream(imageFile);
//            bm.compress(Bitmap.CompressFormat.PNG, 90, out);
//        } catch (Exception e) {
//            e.printStackTrace();
//        } finally {
//            try {
//                if (out != null) {
//                    out.close();
//                }
//            } catch (IOException e) {
//                e.printStackTrace();
//            }
//        }
//        Log.d(TAG, "Image saved");
//    }



    private static int getCameraPhotoOrientation(Context context, File imageFile) {
        int rotate = 0;
        try {

            context.getContentResolver().notifyChange(Uri.fromFile(imageFile), null);
            ExifInterface exif = new ExifInterface(imageFile.getAbsolutePath());
            int orientation = exif.getAttributeInt(
                    ExifInterface.TAG_ORIENTATION,
                    ExifInterface.ORIENTATION_NORMAL);

            switch (orientation) {
                case ExifInterface.ORIENTATION_ROTATE_270:
                    rotate = 270;
                    break;
                case ExifInterface.ORIENTATION_ROTATE_180:
                    rotate = 180;
                    break;
                case ExifInterface.ORIENTATION_ROTATE_90:
                    rotate = 90;
                    break;
            }


            Log.d(TAG, "Exit orientation: " + orientation);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return rotate;
    }

    private static class RotateOrientation {

        Bitmap RotateOrientationCall(Bitmap src, float degree) {
            Matrix matrix = new Matrix();
            matrix.postRotate(degree);
            Bitmap bmOut = Bitmap.createBitmap(src, 0, 0, src.getWidth(), src.getHeight(), matrix, true);
            return bmOut;

        }
    }
}