from dataclasses import dataclass
from typing import Any, Iterable


@dataclass
class SensorData:
    mac: str
    value: Any
    time: int | None = None
    name: str | None = None


def create_nm_req(
        dev_mac: str,
        dev_name: str | None = None,
        sensors: Iterable[SensorData] = ()) -> bytes:
    '''Generate a NarodMon format (#mac#value) request'''

    res = '#' + dev_mac
    if dev_name is not None:
        res += '#' + dev_name
    res += '\n'

    for s in sensors:
        res += f'#{s.mac}#{s.value}'
        if s.time is not None:
            res += f'#{s.time}'
        if s.name is not None:
            res += '#' + s.name
        res += '\n'

    res += '##'

    return res.encode('utf-8')