#!/usr/bin/env python3
from typing import Tuple
import logging
import socket

from redis_super_storage import RedisSuperStorage


class IPWatchdog:

    def __init__(self, redis_store: RedisSuperStorage):
        self._redis_store = redis_store
        self._host_name = socket.gethostname()

    def ip_changed(self) -> Tuple[bool, str]:
        old_ip = self._redis_store.current_ip
        current_ip = socket.gethostbyname(self._host_name)

        if current_ip != old_ip:
            logging.info(f'IP changed: {old_ip} -> {current_ip}')
            self._redis_store.current_ip = current_ip
            return True, current_ip

        return False, old_ip