import os, sys, struct
os.environ['VRVIEW_CHASE'] = sys.argv[3] if len(sys.argv) > 3 else '2'
os.environ.setdefault('SDL_VIDEODRIVER', 'dummy')
from _backend import pick_renderer, save_frame
from vrboard import VirtualBoard, Msg, A
Renderer, backend = pick_renderer()
data = open(sys.argv[1], 'rb').read()
board = VirtualBoard()
off = 0
while off + 8 <= len(data):
    if data[off:off + 4] != b'VPXM':
        off += 1; continue
    ln = struct.unpack_from('<I', data, off + 4)[0]
    body = data[off + 8:off + 8 + ln]; off += 8 + ln
    if len(body) >= 4:
        a = struct.unpack_from('<I', body, 0)[0]
        if a < 0x100:
            try: board.handle(Msg(False, 0xff, a, body[4:]))
            except Exception: pass
r = Renderer(w=832, h=512)
r.cache.maybe_rebuild(board)
c = r.cache
# how many geometries got a texture bound?
bound = sum(1 for inst in c.instances for g in inst['geoms'] if g in c.geom_tex)
tot = sum(len(inst['geoms']) for inst in c.instances)
print(f"instances={len(c.instances)} geoms_total={tot} geoms_textured={bound} "
      f"geom_tex={len(c.geom_tex)} geom_mtl={len(c.geom_mtl)} "
      f"ambient={c.ambient.round(2).tolist()} dirlights={len(c.dirlights)}")
r.draw(board)
save_frame(r, sys.argv[2])
print("wrote", sys.argv[2], f"[{backend}]")