"""Health diagnostic sensor for SWS-12500.

Home Assistant only auto-loads standard platform modules (e.g. `sensor.py`).
This file is a helper module and must be wired from `sensor.py`.
"""

from __future__ import annotations

from typing import Any, cast

from homeassistant.components.sensor import SensorEntity
from homeassistant.config_entries import ConfigEntry
from homeassistant.const import EntityCategory
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity_platform import AddEntitiesCallback
from homeassistant.helpers.update_coordinator import CoordinatorEntity

from .const import DOMAIN
from .data import ENTRY_HEALTH_COORD


async def async_setup_entry(
    hass: HomeAssistant,
    entry: ConfigEntry,
    async_add_entities: AddEntitiesCallback,
) -> None:
    """Set up the health diagnostic sensor."""

    domain_data_any = hass.data.get(DOMAIN)
    if not isinstance(domain_data_any, dict):
        return
    domain_data = cast("dict[str, Any]", domain_data_any)

    entry_data_any = domain_data.get(entry.entry_id)
    if not isinstance(entry_data_any, dict):
        return
    entry_data = cast("dict[str, Any]", entry_data_any)

    coordinator_any = entry_data.get(ENTRY_HEALTH_COORD)
    if coordinator_any is None:
        return

    async_add_entities([HealthDiagnosticSensor(coordinator_any, entry)])


class HealthDiagnosticSensor(  # pyright: ignore[reportIncompatibleVariableOverride]
    CoordinatorEntity, SensorEntity
):
    """Health diagnostic sensor for SWS-12500."""

    _attr_has_entity_name = True
    _attr_should_poll = False

    def __init__(self, coordinator: Any, entry: ConfigEntry) -> None:
        """Initialize the sensor."""
        super().__init__(coordinator)

        self._attr_entity_category = EntityCategory.DIAGNOSTIC
        self._attr_unique_id = f"{entry.entry_id}_health"
        self._attr_name = "Health"
        self._attr_icon = "mdi:heart-pulse"

    @property
    def native_value(self) -> str | None:  # pyright: ignore[reportIncompatibleVariableOverride]
        """Return a compact health state."""

        data = cast("dict[str, Any]", getattr(self.coordinator, "data", {}) or {})
        value = data.get("Integration status")
        return cast("str | None", value)

    @property
    def extra_state_attributes(self) -> dict[str, Any] | None:  # pyright: ignore[reportIncompatibleVariableOverride]
        """Return detailed health diagnostics as attributes."""

        data_any = getattr(self.coordinator, "data", None)
        if not isinstance(data_any, dict):
            return None
        return cast("dict[str, Any]", data_any)