"""Config flow for SNCF integration."""
from __future__ import annotations

import logging
from typing import Any
import voluptuous as vol
from homeassistant import config_entries
from homeassistant.core import HomeAssistant
from homeassistant.data_entry_flow import FlowResult
from homeassistant.exceptions import HomeAssistantError
from .sncf import SNCF
from .const import DOMAIN

_LOGGER = logging.getLogger(__name__)

STEP_USER_DATA_SCHEMA = vol.Schema(
    {
        vol.Required("token"): str,
        vol.Required("source_stop_point"): str,
        vol.Required("dest_stop_point"): str,
        vol.Required("max_transfers"): int,
        vol.Required("max_duration_secs"): int,
    }
)


async def validate_input(hass: HomeAssistant, data: dict[str, Any]) -> dict[str, Any]:
    """Validate the user input allows us to connect.
    Data has the keys from STEP_USER_DATA_SCHEMA with values provided by the user.
    """
    sncf = SNCF(data["token"])
    token_is_valid = await hass.async_add_executor_job(sncf.test_api_key)

    if not token_is_valid:
        raise InvalidAuth

    # Return info that you want to store in the config entry.
    return {"title": "SNCF"}


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

    VERSION = 1

    async def async_step_user(
        self, user_input: dict[str, Any] | None = None
    ) -> FlowResult:
        """Handle the initial step."""
        if user_input is None:
            return self.async_show_form(
                step_id="user", data_schema=STEP_USER_DATA_SCHEMA
            )

        errors = {}

        try:
            info = await validate_input(self.hass, user_input)
        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=STEP_USER_DATA_SCHEMA, errors=errors
        )


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