"""Helpers for LaMetric."""
from __future__ import annotations

from collections.abc import Callable, Coroutine
from typing import Any, TypeVar

from demetriek import LaMetricConnectionError, LaMetricError
from typing_extensions import Concatenate, ParamSpec

from homeassistant.core import HomeAssistant, callback
from homeassistant.exceptions import HomeAssistantError
from homeassistant.helpers import device_registry as dr

from .const import DOMAIN
from .coordinator import LaMetricDataUpdateCoordinator
from .entity import LaMetricEntity

_LaMetricEntityT = TypeVar("_LaMetricEntityT", bound=LaMetricEntity)
_P = ParamSpec("_P")


def lametric_exception_handler(
    func: Callable[Concatenate[_LaMetricEntityT, _P], Coroutine[Any, Any, Any]]
) -> Callable[Concatenate[_LaMetricEntityT, _P], Coroutine[Any, Any, None]]:
    """Decorate LaMetric calls to handle LaMetric exceptions.

    A decorator that wraps the passed in function, catches LaMetric errors,
    and handles the availability of the device in the data coordinator.
    """

    async def handler(
        self: _LaMetricEntityT, *args: _P.args, **kwargs: _P.kwargs
    ) -> None:
        try:
            await func(self, *args, **kwargs)
            self.coordinator.async_update_listeners()

        except LaMetricConnectionError as error:
            self.coordinator.last_update_success = False
            self.coordinator.async_update_listeners()
            raise HomeAssistantError(
                "Error communicating with the LaMetric device"
            ) from error

        except LaMetricError as error:
            raise HomeAssistantError(
                "Invalid response from the LaMetric device"
            ) from error

    return handler


@callback
def async_get_coordinator_by_device_id(
    hass: HomeAssistant, device_id: str
) -> LaMetricDataUpdateCoordinator:
    """Get the LaMetric coordinator for this device ID."""
    device_registry = dr.async_get(hass)

    if (device_entry := device_registry.async_get(device_id)) is None:
        raise ValueError(f"Unknown LaMetric device ID: {device_id}")

    for entry_id in device_entry.config_entries:
        if (
            (entry := hass.config_entries.async_get_entry(entry_id))
            and entry.domain == DOMAIN
            and entry.entry_id in hass.data[DOMAIN]
        ):
            coordinator: LaMetricDataUpdateCoordinator = hass.data[DOMAIN][
                entry.entry_id
            ]
            return coordinator

    raise ValueError(f"No coordinator for device ID: {device_id}")