# text_cleaner.py

import re

def smart_punctuate(text):
    """Basic punctuation cleanup for sentence ends"""
    lines = text.splitlines()
    out = []

    for l in lines:
        stripped = l.strip()

        # Preserve empty lines (paragraph breaks)
        if not stripped:
            out.append("")
        elif not re.search(r'[.!?]$', stripped):
            out.append(stripped + ".")
        else:
            out.append(stripped)

    result = "\n".join(out)

    # Normalize quotes and formatting
    result = result.replace('"', '"').replace('“', '"').replace('”', '"')
    result = result.replace('‘', "'").replace('’', "'")
    result = re.sub(r'\*\*([^*]+)\*\*', r'\1', result)  # remove markdown bold
    result = re.sub(r'_{2,}', '', result)  # remove underlines

    return result