"""Utils for manipulating images."""
import base64
from io import BytesIO
from typing import cast

from PIL import Image
from PIL.ImageFile import ImageFile


def img_2_b64(image: ImageFile, format: str = "JPEG") -> str:
    """
    Convert a PIL.Image to a base64 encoded image string.

    Args:
        image (ImageFile): The PIL Image object to be converted.
        format (str, optional): The image format to save as. Defaults to "JPEG".

    Returns:
        str: A base64 encoded string representation of the image.

    """
    buff = BytesIO()
    image.save(buff, format=format)
    return cast(str, base64.b64encode(buff.getvalue()))


def b64_2_img(data: str) -> ImageFile:
    """
    Convert base64 encoded image string to a PIL.Image.

    Args:
        data (str): The base64 encoded image string.

    Returns:
        ImageFile: A PIL Image object.

    """
    buff = BytesIO(base64.b64decode(data))
    return cast(ImageFile, Image.open(buff))