"""Config flow for Bond integration."""
from json import JSONDecodeError
import logging

from bond import Bond
from requests.exceptions import ConnectionError as RequestConnectionError
import voluptuous as vol

from homeassistant import config_entries, core, exceptions
from homeassistant.const import CONF_ACCESS_TOKEN, CONF_HOST

from .const import DOMAIN  # pylint:disable=unused-import

_LOGGER = logging.getLogger(__name__)

DATA_SCHEMA = vol.Schema(
    {vol.Required(CONF_HOST): str, vol.Required(CONF_ACCESS_TOKEN): str}
)


async def validate_input(hass: core.HomeAssistant, data):
    """Validate the user input allows us to connect."""

    def authenticate(bond_hub: Bond) -> bool:
        try:
            bond_hub.getDeviceIds()
            return True
        except RequestConnectionError:
            raise CannotConnect
        except JSONDecodeError:
            return False

    bond = Bond(data[CONF_HOST], data[CONF_ACCESS_TOKEN])

    if not await hass.async_add_executor_job(authenticate, bond):
        raise InvalidAuth

    # Return info that you want to store in the config entry.
    return {"title": data[CONF_HOST]}


class ConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
    """Handle a config flow for Bond."""

    VERSION = 1
    CONNECTION_CLASS = config_entries.CONN_CLASS_LOCAL_POLL

    async def async_step_user(self, user_input=None):
        """Handle the initial step."""
        errors = {}
        if user_input is not None:
            try:
                info = await validate_input(self.hass, user_input)
            except CannotConnect:
                errors["base"] = "cannot_connect"
            except InvalidAuth:
                errors["base"] = "invalid_auth"
            except Exception:  # pylint: disable=broad-except
                _LOGGER.exception("Unexpected exception")
                errors["base"] = "unknown"
            else:
                return self.async_create_entry(title=info["title"], data=user_input)

        return self.async_show_form(
            step_id="user", data_schema=DATA_SCHEMA, errors=errors
        )


class CannotConnect(exceptions.HomeAssistantError):
    """Error to indicate we cannot connect."""


class InvalidAuth(exceptions.HomeAssistantError):
    """Error to indicate there is invalid auth."""