"""Config flow for Fluss+ integration."""

from collections.abc import Mapping
from typing import Any, override

from fluss_api import (
    FlussApiClient,
    FlussApiClientAuthenticationError,
    FlussApiClientCommunicationError,
)
import voluptuous as vol

from homeassistant.config_entries import ConfigFlow, ConfigFlowResult
from homeassistant.const import CONF_API_KEY
from homeassistant.helpers import config_validation as cv
from homeassistant.helpers.aiohttp_client import async_get_clientsession

from .const import DOMAIN, LOGGER

STEP_USER_DATA_SCHEMA = vol.Schema({vol.Required(CONF_API_KEY): cv.string})


class FlussConfigFlow(ConfigFlow, domain=DOMAIN):
    """Handle a config flow for Fluss+."""

    async def _validate_api_key(self, api_key: str) -> dict[str, str]:
        """Validate the API key and return any errors."""
        errors: dict[str, str] = {}
        client = FlussApiClient(api_key, session=async_get_clientsession(self.hass))
        try:
            await client.async_get_devices()
        except FlussApiClientCommunicationError:
            errors["base"] = "cannot_connect"
        except FlussApiClientAuthenticationError:
            errors["base"] = "invalid_auth"
        except Exception:  # noqa: BLE001
            LOGGER.exception("Unexpected exception occurred")
            errors["base"] = "unknown"
        return errors

    @override
    async def async_step_user(
        self, user_input: dict[str, Any] | None = None
    ) -> ConfigFlowResult:
        """Handle the initial step."""

        errors: dict[str, str] = {}
        if user_input is not None:
            api_key = user_input[CONF_API_KEY]
            self._async_abort_entries_match({CONF_API_KEY: api_key})
            errors = await self._validate_api_key(api_key)
            if not errors:
                return self.async_create_entry(
                    title="My Fluss+ Devices", data=user_input
                )

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

    async def async_step_reauth(
        self, entry_data: Mapping[str, Any]
    ) -> ConfigFlowResult:
        """Handle re-authentication when the API key is no longer valid."""
        return await self.async_step_reauth_confirm()

    async def async_step_reauth_confirm(
        self, user_input: dict[str, Any] | None = None
    ) -> ConfigFlowResult:
        """Confirm re-authentication with a new API key."""
        errors: dict[str, str] = {}
        if user_input is not None:
            api_key = user_input[CONF_API_KEY]
            self._async_abort_entries_match({CONF_API_KEY: api_key})
            errors = await self._validate_api_key(api_key)
            if not errors:
                return self.async_update_reload_and_abort(
                    self._get_reauth_entry(),
                    data_updates={CONF_API_KEY: api_key},
                )

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