"""Offline cutout packing; all scene and lever behaviour lives in MASM."""
from pathlib import Path
import struct
from PIL import Image
from pack_guest_cast import isolate

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


def save(name, cells, width, height):
    frames = []
    for cell in cells:
        cell = isolate(cell)
        scale = min((width-12)/cell.width, (height-12)/cell.height)
        size = round(cell.width*scale),round(cell.height*scale)
        sprite = cell.resize(size,Image.Resampling.LANCZOS)
        sprite.putalpha(sprite.getchannel("A").point(lambda a: 255 if a >= 128 else 0))
        frame = Image.new("RGBA",(width,height))
        frame.alpha_composite(sprite,((width-size[0])//2,height-6-size[1]))
        frames.append(frame)
    raw = b"".join(frame.tobytes("raw","BGRA") for frame in frames)
    (ROOT/f"assets/animations/hall/{name}.bin").write_bytes(
        struct.pack("<4s4I",b"ANM1",width,height,len(frames),len(raw))+raw)
    return frames


def main():
    portal = Image.open(ROOT/"assets/sprites/hall/upper-portal-v2.png").convert("RGBA")
    cells = [portal.crop((c*512,r*512,(c+1)*512,(r+1)*512))
             for r in range(3) for c in range(2)]
    save("upper-portal-v2",cells[:4],224,320)
    save("upper-levers-v2",cells[4:],128,224)
    sheet = Image.open(ROOT/"assets/sprites/hall/upper-furniture-v2.png").convert("RGBA")
    tables = [sheet.crop((0,0,768,512)),sheet.crop((768,0,1536,512))]
    save("upper-games-v2",tables,320,224)
    # The approved sheet places the bartender's head above the lower row line.
    bartender = sheet.crop((180,400,650,1024))
    stool = sheet.crop((860,540,1160,1024))
    save("upper-bar-v2",[bartender,stool],160,256)
    print("Packed two distinct game tables, full bartender/stool, portal and two lever states")


if __name__ == "__main__":
    main()