"""Extend the H3 capture hook to persist every block output once."""

from pathlib import Path


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

old = 'if capture_dir and not H3_CAPTURE_ACTIVE:'
new = 'if capture_dir and not H3_CAPTURE_ACTIVE and not os.path.exists(os.path.join(capture_dir, "blocks_complete")):'
if source.count(old) == 1:
    source = source.replace(old, new)
elif new not in source:
    raise RuntimeError("Unable to locate the H3 input capture condition.")

old = (
    '            else:\n'
    '                h = block(h, t_emb, mod_segments, rope_freqs, transformer_options=transformer_options)\n'
    '        if prefetch_queue is not None:\n'
)
new = (
    '            else:\n'
    '                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 capture_dir and H3_CAPTURE_ACTIVE:\n'
    '            open(os.path.join(capture_dir, "blocks_complete"), "a").close()\n'
    '        if prefetch_queue is not None:\n'
)
if source.count(old) == 1:
    source = source.replace(old, new)
elif new not in source:
    raise RuntimeError("Unable to locate the H3 block loop.")

model.write_text(source, encoding="utf-8")
print("Applied H3 per-block capture patch.")