import sys
ve = "src/encoders/vision_encoder.py"
src = open(ve).read()
if "class MAEMultiLayerSimpleAddEncoder" in src:
    print("already inserted; skipping"); sys.exit(0)
snippet = open("src/encoders/mae_mls_snippet.py").read()
anchor = "# Registry mapping encoder types to classes"
assert anchor in src, "registry anchor not found"
src = src.replace(anchor, snippet.rstrip() + "\n\n\n" + anchor, 1)
reg_anchor = "    'mae': MAEEncoder,"
assert reg_anchor in src, "mae registry line not found"
src = src.replace(reg_anchor, reg_anchor + "\n    'maemls': MAEMultiLayerSimpleAddEncoder,", 1)
open(ve, "w").write(src)
print("inserted MAEMultiLayer + registered maemls OK")