"""Alarm sensors for the Venstar Thermostat."""

from homeassistant.components.binary_sensor import (
    BinarySensorDeviceClass,
    BinarySensorEntity,
)
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback

from .coordinator import VenstarConfigEntry
from .entity import VenstarEntity


async def async_setup_entry(
    hass: HomeAssistant,
    config_entry: VenstarConfigEntry,
    async_add_entities: AddConfigEntryEntitiesCallback,
) -> None:
    """Set up Vensar device binary_sensors based on a config entry."""
    coordinator = config_entry.runtime_data

    if coordinator.client.alerts is None:
        return
    async_add_entities(
        VenstarBinarySensor(coordinator, config_entry, alert["name"])
        for alert in coordinator.client.alerts
    )


class VenstarBinarySensor(VenstarEntity, BinarySensorEntity):
    """Represent a Venstar alert."""

    _attr_device_class = BinarySensorDeviceClass.PROBLEM

    def __init__(self, coordinator, config, alert):
        """Initialize the alert."""
        super().__init__(coordinator, config)
        self.alert = alert
        self._attr_unique_id = f"{config.entry_id}_{alert.replace(' ', '_')}"
        self._attr_name = alert

    @property
    def is_on(self) -> bool | None:
        """Return true if the binary sensor is on."""
        if self._client.alerts is None:
            return None
        for alert in self._client.alerts:
            if alert["name"] == self.alert:
                return alert["active"]

        return None