import requests
from functools import partial
from itertools import cycle
from random import randint
from typing import Any

# todo: convert_func definiert den Typen des Rückgabewerts der Funktion isu
       
_global_cid_generator = cycle(range(1, 0xFFFFFFFF))

def convert_hex(x: str) -> int:
    return int(x, 16)


def convert_not[T](x: T) -> T:
    return x


def isu(ip, index: int, subindex: int = 0, convert_func=convert_not, cid_generator=_global_cid_generator) -> Any:
    cid = next(cid_generator)

    response = requests.post(
		url=f"http://{ip}/iolinkmaster",
		json={
			"code": "request",
			"cid": cid,
			"adr": "/iolinkmaster/port[2]/iolinkdevice/iolreadacyclic",
			"data": {
				"index": index,
				"subindex": subindex,
			},
		},
	)
    response.raise_for_status()
    data = response.json()

    try:
        if int(data.get("code")) != 200:
            raise RuntimeError("code != 200", data)
    except ValueError:
        raise RuntimeError("code is not an integer", data)

    if data.get("cid") != cid:
        raise RuntimeError("Got wrong answer", data)

    return convert_func(data["data"]["value"])


isu("192.168.0.3", 542)