"""Button entities for NVIDIA Shield."""

import logging

from homeassistant.components.button import ButtonEntity
from homeassistant.config_entries import ConfigEntry
from homeassistant.core import HomeAssistant
from homeassistant.helpers import entity_registry as er
from homeassistant.helpers.entity import DeviceInfo
from homeassistant.helpers.entity_platform import AddEntitiesCallback

from .adb_session import AdbMediaSessionPoller, ensure_adb_key
from .const import (
    CONF_ADB_ENABLED,
    CONF_ADB_HOST,
    CONF_ADB_PORT,
    CONF_ANDROIDTV_ENTITY,
    DEFAULT_ADB_PORT,
    DOMAIN,
)

_LOGGER = logging.getLogger(__name__)


async def async_setup_entry(
    hass: HomeAssistant,
    entry: ConfigEntry,
    async_add_entities: AddEntitiesCallback,
) -> None:
    if entry.options.get(CONF_ADB_ENABLED, False):
        async_add_entities([NvidiaShieldPairAdbButton(hass, entry)])


class NvidiaShieldPairAdbButton(ButtonEntity):
    """Button to initiate or re-pair the ADB connection."""

    _attr_has_entity_name = True
    _attr_name = "Pair ADB"
    _attr_icon = "mdi:link-variant"

    def __init__(self, hass: HomeAssistant, entry: ConfigEntry) -> None:
        self.hass = hass
        self._entry = entry
        self._attr_unique_id = f"{DOMAIN}_{entry.entry_id}_pair_adb"

    @property
    def device_info(self) -> DeviceInfo:
        return DeviceInfo(
            identifiers={(DOMAIN, self._entry.entry_id)},
            name=self._entry.title,
            manufacturer="NVIDIA",
            model="Shield TV",
        )

    def _resolve_host(self) -> str | None:
        """Resolve ADB host from config or Android TV entity."""
        host = self._entry.options.get(CONF_ADB_HOST)
        if host:
            return host

        atv_entity = self._entry.data.get(CONF_ANDROIDTV_ENTITY)
        if not atv_entity:
            return None

        registry = er.async_get(self.hass)
        entity_entry = registry.async_get(atv_entity)
        if not entity_entry or not entity_entry.config_entry_id:
            return None

        config_entry = self.hass.config_entries.async_get_entry(entity_entry.config_entry_id)
        if config_entry:
            return config_entry.data.get("host")
        return None

    async def async_press(self) -> None:
        """Attempt ADB connection. The Shield will show a pairing prompt."""
        host = self._resolve_host()
        port = self._entry.options.get(CONF_ADB_PORT, DEFAULT_ADB_PORT)

        if not host:
            _LOGGER.error("Could not determine ADB host. Set it in integration options.")
            return

        key_path = await self.hass.async_add_executor_job(
            ensure_adb_key, self.hass.config.config_dir
        )

        _LOGGER.info("Attempting ADB pairing with %s:%d — approve the prompt on the Shield", host, port)

        poller = AdbMediaSessionPoller(host, port, key_path)
        if await poller.connect():
            _LOGGER.info("ADB pairing successful with %s", host)
            await poller.disconnect()
            # Reload to start polling
            await self.hass.config_entries.async_reload(self._entry.entry_id)
        else:
            _LOGGER.error(
                "ADB pairing failed with %s. Make sure Network debugging is enabled "
                "and you approved the prompt on the Shield.",
                host,
            )
            await poller.disconnect()