"""
This module implements some builtin tools.
"""

import asyncio
import sys
from typing import Literal

async def builtin_network_ping(host: str) -> str:
    """Ping `host` to check if it is reachable."""
    try:
        param = '-n' if sys.platform.lower() == 'windows' else '-c'
        cmd = ['ping', param, '1', host]
        process = await asyncio.create_subprocess_exec(
            *cmd,
            stdout=asyncio.subprocess.PIPE,
            stderr=asyncio.subprocess.PIPE
        )
        stdout, stderr = await process.communicate()
        if process.returncode == 0:
            return f"{host} is reachable"
        else:
            return f"{host} is unreachable"
    except Exception as e:
        return f"Exception happened: {e}"