"""Convert logo.png into a multi-size app.ico for the app, taskbar, and installer."""
import os
from PIL import Image


def create_icon():
    base = os.path.dirname(os.path.abspath(__file__))
    src = os.path.join(base, "logo.png")
    dst = os.path.join(base, "app.ico")

    if not os.path.exists(src):
        raise FileNotFoundError(f"logo.png not found in {base}")

    img = Image.open(src).convert("RGBA")

    sizes = [16, 24, 32, 48, 64, 128, 256]
    frames = []
    for s in sizes:
        resized = img.resize((s, s), Image.LANCZOS)
        frames.append(resized)

    frames[0].save(
        dst, format="ICO",
        sizes=[(s, s) for s in sizes],
        append_images=frames[1:],
    )
    print(f"app.ico created from logo.png ({len(sizes)} sizes)")


if __name__ == "__main__":
    create_icon()