"""Config flow for Epion."""

from __future__ import annotations

import logging
from typing import Any

from epion import Epion, EpionAuthenticationError, EpionConnectionError
import voluptuous as vol

from homeassistant.config_entries import ConfigFlow, ConfigFlowResult
from homeassistant.const import CONF_API_KEY

from .const import DOMAIN

_LOGGER = logging.getLogger(__name__)


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

    VERSION = 1

    async def async_step_user(
        self, user_input: dict[str, Any] | None = None
    ) -> ConfigFlowResult:
        """Handle a flow initiated by the user."""
        errors = {}
        if user_input:
            api = Epion(user_input[CONF_API_KEY])
            try:
                api_data = await self.hass.async_add_executor_job(api.get_current)
            except EpionAuthenticationError:
                errors["base"] = "invalid_auth"
            except EpionConnectionError:
                _LOGGER.error("Unexpected problem when configuring Epion API")
                errors["base"] = "cannot_connect"
            else:
                await self.async_set_unique_id(api_data["accountId"])
                self._abort_if_unique_id_configured()
                return self.async_create_entry(
                    title="Epion integration",
                    data=user_input,
                )

        return self.async_show_form(
            step_id="user",
            data_schema=vol.Schema(
                {
                    vol.Required(CONF_API_KEY): str,
                }
            ),
            errors=errors,
        )