from __future__ import annotations

from io import BytesIO

from PIL import Image


def image_bytes_to_webp(raw: bytes, *, quality: int = 82) -> bytes:
    im = Image.open(BytesIO(raw))
    if im.mode == 'P':
        im = im.convert('RGBA')
    elif im.mode == 'LA':
        im = im.convert('RGBA')
    elif im.mode not in ('RGBA', 'RGB'):
        im = im.convert('RGB')
    out = BytesIO()
    im.save(out, format='WEBP', quality=quality)
    return out.getvalue()