"""Demo platform that offers a fake button entity."""
from __future__ import annotations

from homeassistant.components.button import ButtonEntity
from homeassistant.config_entries import ConfigEntry
from homeassistant.const import DEVICE_DEFAULT_NAME
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity_platform import AddEntitiesCallback
from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType

from . import DOMAIN


async def async_setup_platform(
    hass: HomeAssistant,
    config: ConfigType,
    async_add_entities: AddEntitiesCallback,
    discovery_info: DiscoveryInfoType = None,
) -> None:
    """Set up the demo Button entity."""
    async_add_entities(
        [
            DemoButton(
                unique_id="push",
                name="Push",
                icon="mdi:gesture-tap-button",
            ),
        ]
    )


async def async_setup_entry(
    hass: HomeAssistant,
    config_entry: ConfigEntry,
    async_add_entities: AddEntitiesCallback,
) -> None:
    """Set up the Demo config entry."""
    await async_setup_platform(hass, {}, async_add_entities)


class DemoButton(ButtonEntity):
    """Representation of a demo button entity."""

    _attr_should_poll = False

    def __init__(
        self,
        unique_id: str,
        name: str,
        icon: str,
    ) -> None:
        """Initialize the Demo button entity."""
        self._attr_unique_id = unique_id
        self._attr_name = name or DEVICE_DEFAULT_NAME
        self._attr_icon = icon
        self._attr_device_info = {
            "identifiers": {(DOMAIN, unique_id)},
            "name": name,
        }

    async def async_press(self) -> None:
        """Send out a persistent notification."""
        self.hass.components.persistent_notification.async_create(
            "Button pressed", title="Button"
        )