midea.py

"""Midea constants"""
from __future__ import annotations

from binascii import unhexlify
from typing import Final

from cryptography.hazmat.primitives import padding
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes

MSGTYPE_HANDSHAKE_REQUEST: Final = 0x0
MSGTYPE_HANDSHAKE_RESPONSE: Final = 0x1
MSGTYPE_ENCRYPTED_RESPONSE: Final = 0x3
MSGTYPE_ENCRYPTED_REQUEST: Final = 0x6
MSGTYPE_TRANSPARENT: Final = 0xF

DISCOVERY_PORTS: Final = [6445, 20086]

INTERNAL_KEY = unhexlify(
    "c8aa6c57402cac8b5674db84acc89be82c704362da72b5ff21544b483b50d39c"
)


_BLOCKSIZE: Final = 16


def decrypt_internal(data: str) -> str:
    encrypted_data = unhexlify(data)
    cipher = Cipher(algorithms.AES(INTERNAL_KEY), modes.ECB())  # nosec
    decryptor = cipher.decryptor()
    decrypted = decryptor.update(encrypted_data) + decryptor.finalize()
    unpadder = padding.PKCS7(_BLOCKSIZE * 8).unpadder()
    result = unpadder.update(decrypted) + unpadder.finalize()
    return str(result, "utf-8")


SUPPORTED_APPS: Final = {
    "NetHome Plus": {
        "appkey": "3742e9e5842d4ad59c2db887e12449f9",
        "appid": 1017,
        "apiurl": "https://mapp.appsmb.com",
        "signkey": "xhdiwjnchekd4d512chdjx5d8e4c394D2D7S",
        "proxied": None,
    },
    "Midea Air": {
        "appkey": "ff0cf6f5f0c3471de36341cab3f7a9af",
        "appid": 1117,
        "apiurl": "https://mapp.appsmb.com",
        "signkey": "xhdiwjnchekd4d512chdjx5d8e4c394D2D7S",
        "proxied": None,
    },
    "Ariston Clima": {
        "appkey": "434a209a5ce141c3b726de067835d7f0",
        "appid": 1005,
        "apiurl": "https://mapp.appsmb.com",
        "signkey": "xhdiwjnchekd4d512chdjx5d8e4c394D2D7S",
        "proxied": None,
    },
    "MSmartHome": {
        "appkey": "ac21b9f9cbfe4ca5a88562ef25e2b768",
        "appid": 1010,
        "apiurl": "https://mp-prod.appsmb.com/mas/v5/app/proxy?alias=",
        "signkey": "xhdiwjnchekd4d512chdjx5d8e4c394D2D7S",
        # meicloud
        "iotkey": decrypt_internal("f4dcd1511147af45775d7e680ac5312b"),  # noqa: E501
        # PROD_VnoClJI9aikS8dyy
        "hmackey": decrypt_internal(
            "5018e65c32bcec087e6c01631d8cf55398308fc19344d3e130734da81ac2e162"
        ),
        "proxied": "v5",
    },
}

# spell-checker: ignore unsubscriptable
# pylint: disable=unsubscriptable-object
DEFAULT_APP = "NetHome Plus"
DEFAULT_APPKEY: Final[str] = SUPPORTED_APPS[DEFAULT_APP]["appkey"]
DEFAULT_APP_ID: Final[int] = SUPPORTED_APPS[DEFAULT_APP]["appid"]
DEFAULT_API_SERVER_URL: Final[str] = SUPPORTED_APPS[DEFAULT_APP]["apiurl"]
DEFAULT_SIGNKEY: Final[str] = SUPPORTED_APPS[DEFAULT_APP]["signkey"]
DEFAULT_HMACKEY: Final[str] = SUPPORTED_APPS[DEFAULT_APP].get("hmackey")
DEFAULT_IOTKEY: Final[str] = SUPPORTED_APPS[DEFAULT_APP].get("iotkey")
DEFAULT_PROXIED: Final[str] = SUPPORTED_APPS[DEFAULT_APP]["proxied"]
# pylint: enable=unsubscriptable-object


DEFAULT_RETRIES: Final = 3
DEFAULT_TIMEOUT: Final = 3

ERROR_CODE_P2: Final = 38
ERROR_CODE_BUCKET_FULL: Final = ERROR_CODE_P2
ERROR_CODE_BUCKET_REMOVED: Final = 37

APPLIANCE_TYPE_DEHUMIDIFIER: Final = "0xa1"
APPLIANCE_TYPE_AIRCON: Final = "0xac"

AC_MIN_TEMPERATURE: Final = 16
AC_MAX_TEMPERATURE: Final = 31