# Generates the PWA icons in public/icons and the catalog icon in .kody/icon.png.
# A calm mark: a softly lit arched frame on a dark background. Needs Pillow.
from PIL import Image, ImageDraw, ImageFilter

BG = (16, 17, 22)
GOLD = (214, 182, 120)
LIGHT = (255, 236, 196)


def draw(size, maskable):
    s = size * 4
    img = Image.new('RGBA', (s, s), BG + (255,))
    pad = s * (0.24 if maskable else 0.16)
    w = s - 2 * pad
    arch_w = w * 0.62
    arch_h = w * 0.86
    left = (s - arch_w) / 2
    top = (s - arch_h) / 2
    r = arch_w / 2
    glow = Image.new('RGBA', (s, s), (0, 0, 0, 0))
    g = ImageDraw.Draw(glow)
    g.ellipse([s / 2 - r * 0.9, top + r * 0.2, s / 2 + r * 0.9, top + r * 2.0], fill=LIGHT + (150,))
    glow = glow.filter(ImageFilter.GaussianBlur(s * 0.06))
    img.alpha_composite(glow)
    d = ImageDraw.Draw(img)
    line = max(2, int(s * 0.022))
    d.arc([left, top, left + arch_w, top + arch_w], 180, 360, fill=GOLD, width=line)
    d.line([left + line / 2, top + r, left + line / 2, top + arch_h], fill=GOLD, width=line)
    d.line([left + arch_w - line / 2, top + r, left + arch_w - line / 2, top + arch_h], fill=GOLD, width=line)
    d.line([left, top + arch_h - line / 2, left + arch_w, top + arch_h - line / 2], fill=GOLD, width=line)
    img = img.resize((size, size), Image.LANCZOS)
    if not maskable:
        mask = Image.new('L', (size, size), 0)
        ImageDraw.Draw(mask).rounded_rectangle([0, 0, size - 1, size - 1], radius=int(size * 0.2), fill=255)
        img.putalpha(mask)
    return img


for size in (192, 512):
    draw(size, False).save(f'public/icons/icon-{size}.png', optimize=True)
    draw(size, True).save(f'public/icons/maskable-{size}.png', optimize=True)
draw(512, False).save('.kody/icon.png', optimize=True)