def chunk_text(
    text:       str,
    chunk_size: int = 512,
    overlap:    int = 50,
) -> list[dict]:
    """Text in ueberlappende Chunks aufteilen"""
    chunks  = []
    start   = 0
    index   = 0

    while start < len(text):
        end   = start + chunk_size
        chunk = text[start:end]

        if end < len(text):
            last_period = max(
                chunk.rfind(". "),
                chunk.rfind(".\n"),
                chunk.rfind("! "),
                chunk.rfind("? "),
            )
            if last_period > chunk_size // 2:
                end   = start + last_period + 1
                chunk = text[start:end]

        if chunk.strip():
            chunks.append({
                "text":  chunk.strip(),
                "index": index,
                "start": start,
            })

        start  = end - overlap
        index += 1

    return chunks