"""Add only per-block output capture to the minimal H3 reference hook."""

from pathlib import Path


model = Path("/opt/ComfyUI/comfy/ldm/minimax/model.py")
source = model.read_text(encoding="utf-8")

old = "        for i, block in enumerate(self.blocks):\n            comfy.model_prefetch.prefetch_queue_pop(prefetch_queue, device, block)\n"
new = (
    "        for i, block in enumerate(self.blocks):\n"
    "            comfy.model_prefetch.prefetch_queue_pop(prefetch_queue, device, block)\n"
)
if source.count(old) != 1:
    raise RuntimeError("Unable to locate H3 block loop.")

old = "                h = block(h, t_emb, mod_segments, rope_freqs, transformer_options=transformer_options)\n"
new = (
    "                h = block(h, t_emb, mod_segments, rope_freqs, transformer_options=transformer_options)\n"
    "            if capture_dir and H3_CAPTURE_ACTIVE:\n"
    "                block_dir = os.path.join(capture_dir, \"blocks\")\n"
    "                os.makedirs(block_dir, exist_ok=True)\n"
    "                torch.save(h.detach().cpu(), os.path.join(block_dir, f\"{i:02d}.pt\"))\n"
)
if source.count(old) != 1:
    raise RuntimeError("Unable to locate H3 direct block execution.")
source = source.replace(old, new)
model.write_text(source, encoding="utf-8")
print("Applied minimal H3 per-block capture patch.")