"""Config flow for Integration 101 Template integration."""

from __future__ import annotations

import logging
from typing import Any

import voluptuous as vol

from homeassistant.config_entries import (
    ConfigEntry,
    ConfigFlow,
    ConfigFlowResult,
    OptionsFlow,
)
from homeassistant.const import (
    CONF_HOST,
    CONF_PASSWORD,
    CONF_SCAN_INTERVAL,
    CONF_USERNAME,
)
from homeassistant.core import HomeAssistant, callback
from homeassistant.exceptions import HomeAssistantError
from homeassistant.helpers.aiohttp_client import async_get_clientsession

from .api import (RouterAPI,
                  RouterAPIAuthError,
                  RouterAPIConnectionError)
from .const import (DEFAULT_SCAN_INTERVAL,
                    DOMAIN,
                    MIN_SCAN_INTERVAL,
                    DEFAULT_IP,
                    DEFAULT_USER)

_LOGGER = logging.getLogger(__name__)

# TODO adjust the data schema to the data that you need
STEP_USER_DATA_SCHEMA = vol.Schema(
    {
        vol.Required(CONF_HOST, description={"suggested_value": DEFAULT_IP}): str,
        vol.Required(CONF_USERNAME, description={"suggested_value": DEFAULT_USER}): 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.
    """
    # TODO validate the data can be used to set up a connection.

    # If your PyPI package is not built with async, pass your methods
    # to the executor:
    # await hass.async_add_executor_job(
    #     your_validate_func, data[CONF_USERNAME], data[CONF_PASSWORD]
    # )

    session = async_get_clientsession(
        hass=hass,
        verify_ssl=False
    )

    api = RouterAPI(host=data[CONF_HOST],
                    user=data[CONF_USERNAME],
                    pwd=data[CONF_PASSWORD],
                    session=session)
    try:
        await api.async_login()
    except RouterAPIAuthError as err:
        raise InvalidAuth from err
    except RouterAPIConnectionError as err:
        raise CannotConnect from err
    
    return {"title": f"Odido Klik & Klaar router - {data[CONF_HOST]}"}


class RouterConfigFlow(ConfigFlow, domain=DOMAIN):
    """Handle a config flow for Example Integration."""

    VERSION = 1
    _input_data: dict[str, Any]

    @staticmethod
    @callback
    def async_get_options_flow(config_entry):
        """Get the options flow for this handler."""
        # Remove this method and the ExampleOptionsFlowHandler class
        # if you do not want any options for your integration.
        return RouterOptionsFlowHandler(config_entry)

    async def async_step_user(
        self, user_input: dict[str, Any] | None = None
    ) -> ConfigFlowResult:
        """Handle the initial step."""
        # Called when you initiate adding an integration via the UI
        errors: dict[str, str] = {}

        if user_input is not None:
            # The form has been filled in and submitted, so process the data provided.
            try:
                # Validate that the setup data is valid and if not handle errors.
                # The errors["base"] values match the values in your strings.json and translation files.
                info = await validate_input(self.hass, user_input)
            except CannotConnect:
                errors["base"] = "cannot_connect"
            except InvalidAuth:
                errors["base"] = "invalid_auth"
            except Exception as e:  # pylint: disable=broad-except
                _LOGGER.exception(f"Unexpected exception: {e}")
                errors["base"] = "unknown"
                #errors[CONF_PASSWORD] = str(e)

            if "base" not in errors:
                # Validation was successful, so create a unique id for this instance of your integration
                # and create the config entry.
                await self.async_set_unique_id(info.get("title"))
                self._abort_if_unique_id_configured()
                return self.async_create_entry(title=info["title"], data=user_input)

        # Show initial form.
        return self.async_show_form(
            step_id="user", data_schema=STEP_USER_DATA_SCHEMA, errors=errors
        )

    async def async_step_reconfigure(
        self, user_input: dict[str, Any] | None = None
    ) -> ConfigFlowResult:
        """Add reconfigure step to allow to reconfigure a config entry."""
        # This methid displays a reconfigure option in the integration and is
        # different to options.
        # It can be used to reconfigure any of the data submitted when first installed.
        # This is optional and can be removed if you do not want to allow reconfiguration.
        errors: dict[str, str] = {}
        config_entry = self.hass.config_entries.async_get_entry(
            self.context["entry_id"]
        )

        if user_input is not None:
            try:
                user_input[CONF_HOST] = config_entry.data[CONF_HOST]
                await validate_input(self.hass, user_input)
            except CannotConnect:
                errors["base"] = "cannot_connect"
            except InvalidAuth:
                errors["base"] = "invalid_auth"
            except Exception:  # pylint: disable=broad-except
                _LOGGER.exception("Unexpected exception")
                errors["base"] = "unknown"
            else:
                return self.async_update_reload_and_abort(
                    config_entry,
                    unique_id=config_entry.unique_id,
                    data={**config_entry.data, **user_input},
                    reason="reconfigure_successful",
                )
        return self.async_show_form(
            step_id="reconfigure",
            data_schema=vol.Schema(
                {
                    vol.Required(
                        CONF_USERNAME, default=config_entry.data[CONF_USERNAME]
                    ): str,
                    vol.Required(CONF_PASSWORD): str,
                }
            ),
            errors=errors,
        )


class RouterOptionsFlowHandler(OptionsFlow):
    """Handles the options flow."""

    def __init__(self, config_entry: ConfigEntry) -> None:
        """Initialize options flow."""
        self.config_entry = config_entry
        self.options = dict(config_entry.options)

    async def async_step_init(self, user_input=None):
        """Handle options flow."""
        if user_input is not None:
            options = self.config_entry.options | user_input
            return self.async_create_entry(title="", data=options)

        # It is recommended to prepopulate options fields with default values if available.
        # These will be the same default values you use on your coordinator for setting variable values
        # if the option has not been set.
        data_schema = vol.Schema(
            {
                vol.Required(
                    CONF_SCAN_INTERVAL,
                    default=self.options.get(CONF_SCAN_INTERVAL, DEFAULT_SCAN_INTERVAL),
                ): (vol.All(vol.Coerce(int), vol.Clamp(min=MIN_SCAN_INTERVAL))),
            }
        )

        return self.async_show_form(step_id="init", data_schema=data_schema)


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


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