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

import logging
from typing import Any

import aiotractive
import voluptuous as vol

from homeassistant import config_entries
from homeassistant.const import CONF_EMAIL, CONF_PASSWORD
from homeassistant.core import HomeAssistant
from homeassistant.data_entry_flow import FlowResult
from homeassistant.exceptions import HomeAssistantError

from .const import DOMAIN

_LOGGER = logging.getLogger(__name__)

USER_DATA_SCHEMA = vol.Schema(
    {vol.Required(CONF_EMAIL): str, vol.Required(CONF_PASSWORD): str}
)


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.
    """

    client = aiotractive.api.API(data[CONF_EMAIL], data[CONF_PASSWORD])
    try:
        user_id = await client.user_id()
    except aiotractive.exceptions.UnauthorizedError as error:
        raise InvalidAuth from error
    finally:
        await client.close()

    return {"title": data[CONF_EMAIL], "user_id": user_id}


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

    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=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:
            await self.async_set_unique_id(info["user_id"])
            self._abort_if_unique_id_configured()
            return self.async_create_entry(title=info["title"], data=user_input)

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

    async def async_step_reauth(self, _: dict[str, Any]) -> FlowResult:
        """Handle configuration by re-auth."""
        return await self.async_step_reauth_confirm()

    async def async_step_reauth_confirm(
        self, user_input: dict[str, Any] = None
    ) -> FlowResult:
        """Dialog that informs the user that reauth is required."""

        errors = {}

        if user_input is not None:
            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:
                existing_entry = await self.async_set_unique_id(info["user_id"])
                if existing_entry:
                    await self.hass.config_entries.async_reload(existing_entry.entry_id)
                    return self.async_abort(reason="reauth_successful")
                return self.async_abort(reason="reauth_failed_existing")

        return self.async_show_form(
            step_id="reauth_confirm",
            data_schema=USER_DATA_SCHEMA,
            errors=errors,
        )


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