# -*- coding: utf-8 -*-
"""Utility condivise per chunking testo RAG."""

import re

CHUNK_SIZE = 900
CHUNK_OVERLAP = 150


def chunk_text(text: str) -> list[str]:
    text = re.sub(r"\n{3,}", "\n\n", text.strip())
    if len(text) <= CHUNK_SIZE:
        return [text] if text else []
    chunks = []
    start = 0
    while start < len(text):
        end = min(len(text), start + CHUNK_SIZE)
        chunks.append(text[start:end])
        if end >= len(text):
            break
        start = max(end - CHUNK_OVERLAP, start + 1)
    return chunks