"""Offline packing only: wall paintings and a small iron drainage texture."""
from pathlib import Path
import struct
from PIL import Image

ROOT = Path(__file__).resolve().parents[2]


def main():
    image = Image.open(ROOT/"assets/sprites/hall/wall-paintings-v6.png").convert("RGBA")
    frames = []
    for side in range(2):
        part = image.crop((side*image.width//2,0,(side+1)*image.width//2,image.height))
        mask = part.getchannel("A").point(lambda a:255 if a>=96 else 0)
        part = part.crop(mask.getbbox()).resize((128,128),Image.Resampling.LANCZOS)
        part.putalpha(part.getchannel("A").point(lambda a:255 if a>=128 else 0))
        frames.append(part)
    drain = Image.new("RGBA",(128,128),(51,55,57,255))
    for y in range(128):
        for x in range(128):
            if 7<x<121 and 7<y<121:
                value = 21 if x%16<10 else 68+(y%3)*3
            else:
                value = 78 if x<4 or y<4 else 40
            drain.putpixel((x,y),(value,value+2,value+3,255))
    frames.append(drain)
    raw = b"".join(frame.tobytes("raw","BGRA") for frame in frames)
    (ROOT/"assets/animations/hall/world-dressing-v6.bin").write_bytes(struct.pack("<4s4I",b"ANM1",128,128,3,len(raw))+raw)
    print("Packed two framed wall paintings and one iron drainage material, 128x128 BGRA")


if __name__=="__main__":
    main()