import re

def mask_pii(text: str) -> tuple[str, dict]:
    mapping = {}
    counter = {"NAME": 0, "EMAIL": 0, "PHONE": 0}

    # T.C. (11 hane)
    for m in re.finditer(r"\b\d{11}\b", text):
        token = f"<TCKN_{counter['NAME']}>"
        mapping[token] = m.group()
        text = text.replace(m.group(), token)
        counter["NAME"] += 1

    # Email
    for m in re.finditer(r"\S+@\S+\.\S+", text):
        token = f"<EMAIL_{counter['EMAIL']}>"
        mapping[token] = m.group()
        text = text.replace(m.group(), token)
        counter["EMAIL"] += 1

    return text, mapping

masked, mapping = mask_pii("Ali Yılmaz, TC: 12345678901")
# masked: "<NAME_0>, TC: <TCKN_0>"

# LLM'e gönder
response = llm(masked)

# Geri sok
for token, original in mapping.items():
    response = response.replace(token, original)