import os, tempfile, uuid
import batchalign as ba

def to_cha_from_wav(wav_path: str, lang: str = "eng") -> str:
    """Run Batchalign → CHAT and return path to .cha"""
    nlp = ba.BatchalignPipeline.new("asr,morphosyntax", lang=lang)
    doc = ba.Document.new(media_path=wav_path, lang=lang)
    doc = nlp(doc)

    chat = ba.CHATFile(doc=doc)

    out_dir = tempfile.mkdtemp(prefix="cha_")
    out_path = os.path.join(out_dir, f"{uuid.uuid4().hex}.cha")
    chat.write(out_path, write_wor=True)   # keep your preferred flags
    return out_path

if __name__ == "__main__":
    import sys
    print(to_cha_from_wav(sys.argv[1]))