"""Adds config flow for tibber_prices."""

from __future__ import annotations

import voluptuous as vol
from homeassistant import config_entries
from homeassistant.const import CONF_ACCESS_TOKEN
from homeassistant.helpers import selector
from homeassistant.helpers.aiohttp_client import async_create_clientsession
from slugify import slugify

from .api import (
    TibberPricesApiClient,
    TibberPricesApiClientAuthenticationError,
    TibberPricesApiClientCommunicationError,
    TibberPricesApiClientError,
)
from .const import DOMAIN, LOGGER


class TibberPricesFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
    """Config flow for tibber_prices."""

    VERSION = 1

    async def async_step_user(
        self,
        user_input: dict | None = None,
    ) -> config_entries.ConfigFlowResult:
        """Handle a flow initialized by the user."""
        _errors = {}
        if user_input is not None:
            try:
                name = await self._test_credentials(
                    access_token=user_input[CONF_ACCESS_TOKEN]
                )
            except TibberPricesApiClientAuthenticationError as exception:
                LOGGER.warning(exception)
                _errors["base"] = "auth"
            except TibberPricesApiClientCommunicationError as exception:
                LOGGER.error(exception)
                _errors["base"] = "connection"
            except TibberPricesApiClientError as exception:
                LOGGER.exception(exception)
                _errors["base"] = "unknown"
            else:
                await self.async_set_unique_id(unique_id=slugify(name))
                self._abort_if_unique_id_configured()
                return self.async_create_entry(
                    title=name,
                    data=user_input,
                )

        return self.async_show_form(
            step_id="user",
            data_schema=vol.Schema(
                {
                    vol.Required(
                        CONF_ACCESS_TOKEN,
                        default=(user_input or {}).get(
                            CONF_ACCESS_TOKEN, vol.UNDEFINED
                        ),
                    ): selector.TextSelector(
                        selector.TextSelectorConfig(
                            type=selector.TextSelectorType.TEXT,
                        ),
                    ),
                },
            ),
            errors=_errors,
        )

    async def _test_credentials(self, access_token: str) -> str:
        """Validate credentials and return the user's name."""
        client = TibberPricesApiClient(
            access_token=access_token,
            session=async_create_clientsession(self.hass),
        )
        result = await client.async_test_connection()
        return result["viewer"]["name"]