from __future__ import annotations

import re


def chunk_text(text: str, limit: int = 1000) -> list[str]:
    if len(text) <= limit:
        return [text]

    chunks = []
    remaining = text
    while remaining:
        if len(remaining) <= limit:
            chunks.append(remaining)
            break
        split_at = remaining.rfind("\n", 0, limit + 1)
        if split_at == -1 or split_at < limit // 2:
            split_at = remaining.rfind(". ", 0, limit + 1)
        if split_at == -1 or split_at < limit // 2:
            split_at = remaining.rfind(" ", 0, limit + 1)
        if split_at == -1 or split_at < limit // 2:
            split_at = limit
        chunks.append(remaining[:split_at].strip())
        remaining = remaining[split_at:].strip()
    return chunks


def strip_markdown(text: str) -> str:
    text = re.sub(r"\*\*(.+?)\*\*", r"\1", text)
    text = re.sub(r"\*(.+?)\*", r"\1", text)
    text = re.sub(r"`(.+?)`", r"\1", text)
    text = re.sub(r"\[(.+?)\]\((.+?)\)", r"\1 (\2)", text)
    text = re.sub(r"^#{1,6}\s+", "", text, flags=re.MULTILINE)
    text = re.sub(r"^>\s+", "", text, flags=re.MULTILINE)
    text = re.sub(r"^[\-\*\+]\s+", "• ", text, flags=re.MULTILINE)
    text = re.sub(r"^(\d+)\.\s+", r"\1. ", text, flags=re.MULTILINE)
    text = re.sub(r"~~(.+?)~~", r"\1", text)
    return text.strip()