"""Config flow for Kumi Sensors 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 homeassistant.const import CONF_NAME, CONF_HOST

from .const import DOMAIN
from .kumisensors import KumiSensors

from urllib.request import urlopen

_LOGGER = logging.getLogger(__name__)

STEP_USER_DATA_SCHEMA = vol.Schema({"host": 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.
    """

    hub = KumiSensors(data[CONF_HOST], hass)

    if not await hub.connect():
        raise CannotConnect

    # Return info that you want to store in the config entry.
    return {CONF_NAME: await hub.get_identifier()}


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

    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)
            user_input[CONF_NAME] = info[CONF_NAME]
        except CannotConnect:
            errors["base"] = "cannot_connect"
        except Exception:  # pylint: disable=broad-except
            _LOGGER.exception("Unexpected exception")
            errors["base"] = "unknown"
        else:
            return self.async_create_entry(title=info[CONF_NAME], data=user_input)

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


class CannotConnect(HomeAssistantError):
    """Error to indicate we cannot connect."""