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"""Zeroconf helper functions for Shelly devices."""
from __future__ import annotations
import logging
from zeroconf import IPVersion
from zeroconf.asyncio import AsyncServiceInfo, AsyncZeroconf
LOGGER = logging.getLogger(__name__)
async def async_lookup_device_by_name(
aiozc: AsyncZeroconf, device_name: str
) -> tuple[str, int] | None:
"""Look up a Shelly device by name via zeroconf.
Args:
aiozc: AsyncZeroconf instance
device_name: Device name (e.g., "ShellyPlugUS-C049EF8873E8")
Returns:
Tuple of (host, port) if found, None otherwise
"""
service_name = f"{device_name}._http._tcp.local."
LOGGER.debug("Active lookup for: %s", service_name)
service_info = AsyncServiceInfo("_http._tcp.local.", service_name)
if not await service_info.async_request(aiozc.zeroconf, 5000):
LOGGER.debug("Active lookup did not find service")
return None
addresses = service_info.parsed_addresses(IPVersion.V4Only)
if not addresses or not service_info.port:
LOGGER.debug("Active lookup found service but no IPv4 addresses or port")
return None
host = addresses[0]
port = service_info.port
LOGGER.debug("Found device via active lookup at %s:%s", host, port)
return (host, port)
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