text: """Config flow for Roku."""
  from __future__ import annotations
  
  import logging
  from urllib.parse import urlparse
  
  from rokuecp import Roku, RokuError
  import voluptuous as vol
  
  from homeassistant.components import ssdp, zeroconf
  from homeassistant.components.ssdp import (
      ATTR_SSDP_LOCATION,
      ATTR_UPNP_FRIENDLY_NAME,
      ATTR_UPNP_SERIAL,
  )
  from homeassistant.config_entries import ConfigFlow
  from homeassistant.const import CONF_HOST, CONF_NAME
  from homeassistant.core import HomeAssistant, callback
  from homeassistant.data_entry_flow import FlowResult
  from homeassistant.helpers.aiohttp_client import async_get_clientsession
  
  from .const import DOMAIN
  
  DATA_SCHEMA = vol.Schema({vol.Required(CONF_HOST): str})
  
  ERROR_CANNOT_CONNECT = "cannot_connect"
  ERROR_UNKNOWN = "unknown"
  
  _LOGGER = logging.getLogger(__name__)
  
  
  async def validate_input(hass: HomeAssistant, data: dict) -> dict:
      """Validate the user input allows us to connect.
  
      Data has the keys from DATA_SCHEMA with values provided by the user.
      """
      session = async_get_clientsession(hass)
      roku = Roku(data[CONF_HOST], session=session)
      device = await roku.update()
  
      return {
          "title": device.info.name,
          "serial_number": device.info.serial_number,
      }
  
  
  class RokuConfigFlow(ConfigFlow, domain=DOMAIN):
      """Handle a Roku config flow."""
  
      VERSION = 1
  
      def __init__(self):
          """Set up the instance."""
          self.discovery_info = {}
  
      @callback
      def _show_form(self, errors: dict | None = None) -> FlowResult:
          """Show the form to the user."""
          return self.async_show_form(
              step_id="user",
              data_schema=DATA_SCHEMA,
              errors=errors or {},
          )
  
      async def async_step_user(self, user_input: dict | None = None) -> FlowResult:
          """Handle a flow initialized by the user."""
          if not user_input:
              return self._show_form()
  
          errors = {}
  
          try:
              info = await validate_input(self.hass, user_input)
          except RokuError:
              _LOGGER.debug("Roku Error", exc_info=True)
              errors["base"] = ERROR_CANNOT_CONNECT
              return self._show_form(errors)
          except Exception:  # pylint: disable=broad-except
              _LOGGER.exception("Unknown error trying to connect")
              return self.async_abort(reason=ERROR_UNKNOWN)
  
          await self.async_set_unique_id(info["serial_number"])
          self._abort_if_unique_id_configured(updates={CONF_HOST: user_input[CONF_HOST]})
  
          return self.async_create_entry(title=info["title"], data=user_input)
  
      async def async_step_homekit(
          self, discovery_info: zeroconf.ZeroconfServiceInfo
      ) -> FlowResult:
          """Handle a flow initialized by homekit discovery."""
  
          # If we already have the host configured do
          # not open connections to it if we can avoid it.
          self._async_abort_entries_match({CONF_HOST: discovery_info[zeroconf.ATTR_HOST]})
  
          self.discovery_info.update({CONF_HOST: discovery_info[zeroconf.ATTR_HOST]})
  
          try:
              info = await validate_input(self.hass, self.discovery_info)
          except RokuError:
              _LOGGER.debug("Roku Error", exc_info=True)
              return self.async_abort(reason=ERROR_CANNOT_CONNECT)
          except Exception:  # pylint: disable=broad-except
              _LOGGER.exception("Unknown error trying to connect")
              return self.async_abort(reason=ERROR_UNKNOWN)
  
          await self.async_set_unique_id(info["serial_number"])
          self._abort_if_unique_id_configured(
              updates={CONF_HOST: discovery_info[zeroconf.ATTR_HOST]},
          )
  
          self.context.update({"title_placeholders": {"name": info["title"]}})
          self.discovery_info.update({CONF_NAME: info["title"]})
  
          return await self.async_step_discovery_confirm()
  
      async def async_step_ssdp(self, discovery_info: ssdp.SsdpServiceInfo) -> FlowResult:
          """Handle a flow initialized by discovery."""
          host = urlparse(discovery_info[ATTR_SSDP_LOCATION]).hostname
          name = discovery_info[ATTR_UPNP_FRIENDLY_NAME]
          serial_number = discovery_info[ATTR_UPNP_SERIAL]
  
          await self.async_set_unique_id(serial_number)
          self._abort_if_unique_id_configured(updates={CONF_HOST: host})
  
          self.context.update({"title_placeholders": {"name": name}})
  
          self.discovery_info.update({CONF_HOST: host, CONF_NAME: name})
  
          try:
              await validate_input(self.hass, self.discovery_info)
          except RokuError:
              _LOGGER.debug("Roku Error", exc_info=True)
              return self.async_abort(reason=ERROR_CANNOT_CONNECT)
          except Exception:  # pylint: disable=broad-except
              _LOGGER.exception("Unknown error trying to connect")
              return self.async_abort(reason=ERROR_UNKNOWN)
  
          return await self.async_step_discovery_confirm()
  
      async def async_step_discovery_confirm(
          self, user_input: dict | None = None
      ) -> FlowResult:
          """Handle user-confirmation of discovered device."""
          if user_input is None:
              return self.async_show_form(
                  step_id="discovery_confirm",
                  description_placeholders={"name": self.discovery_info[CONF_NAME]},
                  errors={},
              )
  
          return self.async_create_entry(
              title=self.discovery_info[CONF_NAME],
              data=self.discovery_info,
          )
  