"""Config flow for FAA Delays integration."""
import logging

from aiohttp import ClientConnectionError
import faadelays
import voluptuous as vol

from homeassistant import config_entries
from homeassistant.const import CONF_ID
from homeassistant.helpers import aiohttp_client

from .const import DOMAIN

_LOGGER = logging.getLogger(__name__)

DATA_SCHEMA = vol.Schema({vol.Required(CONF_ID): str})


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

    VERSION = 1

    async def async_step_user(self, user_input=None):
        """Handle the initial step."""
        errors = {}
        if user_input is not None:

            await self.async_set_unique_id(user_input[CONF_ID])
            self._abort_if_unique_id_configured()

            websession = aiohttp_client.async_get_clientsession(self.hass)

            data = faadelays.Airport(user_input[CONF_ID], websession)

            try:
                await data.update()

            except faadelays.InvalidAirport:
                _LOGGER.error("Airport code %s is invalid", user_input[CONF_ID])
                errors[CONF_ID] = "invalid_airport"

            except ClientConnectionError:
                _LOGGER.error("Error connecting to FAA API")
                errors["base"] = "cannot_connect"

            except Exception as error:  # pylint: disable=broad-except
                _LOGGER.exception("Unexpected exception: %s", error)
                errors["base"] = "unknown"

            if not errors:
                _LOGGER.debug(
                    "Creating entry with id: %s, name: %s",
                    user_input[CONF_ID],
                    data.name,
                )
                return self.async_create_entry(title=data.name, data=user_input)

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