"""Config flow for NZBGet."""

from __future__ import annotations

import logging
from typing import Any

import voluptuous as vol

from homeassistant.config_entries import ConfigFlow, ConfigFlowResult
from homeassistant.const import (
    CONF_HOST,
    CONF_NAME,
    CONF_PASSWORD,
    CONF_PORT,
    CONF_SSL,
    CONF_USERNAME,
    CONF_VERIFY_SSL,
)

from .const import DEFAULT_NAME, DEFAULT_PORT, DEFAULT_SSL, DEFAULT_VERIFY_SSL, DOMAIN
from .coordinator import NZBGetAPI, NZBGetAPIException

_LOGGER = logging.getLogger(__name__)


def _validate_input(data: dict[str, Any]) -> None:
    """Validate the user input allows us to connect.

    Data has the keys from DATA_SCHEMA with values provided by the user.
    """
    nzbget_api = NZBGetAPI(
        data[CONF_HOST],
        data.get(CONF_USERNAME),
        data.get(CONF_PASSWORD),
        data[CONF_SSL],
        data[CONF_VERIFY_SSL],
        data[CONF_PORT],
    )

    nzbget_api.version()


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

    VERSION = 1

    async def async_step_user(
        self, user_input: dict[str, Any] | None = None
    ) -> ConfigFlowResult:
        """Handle a flow initiated by the user."""
        if self._async_current_entries():
            return self.async_abort(reason="single_instance_allowed")

        errors = {}

        if user_input is not None:
            if CONF_VERIFY_SSL not in user_input:
                user_input[CONF_VERIFY_SSL] = DEFAULT_VERIFY_SSL

            try:
                await self.hass.async_add_executor_job(_validate_input, user_input)
            except NZBGetAPIException:
                errors["base"] = "cannot_connect"
            except Exception:
                _LOGGER.exception("Unexpected exception")
                return self.async_abort(reason="unknown")
            else:
                return self.async_create_entry(
                    title=user_input[CONF_HOST],
                    data=user_input,
                )

        data_schema = {
            vol.Required(CONF_HOST): str,
            vol.Optional(CONF_NAME, default=DEFAULT_NAME): str,
            vol.Optional(CONF_USERNAME): str,
            vol.Optional(CONF_PASSWORD): str,
            vol.Optional(CONF_PORT, default=DEFAULT_PORT): int,
            vol.Optional(CONF_SSL, default=DEFAULT_SSL): bool,
        }

        if self.show_advanced_options:
            data_schema[vol.Optional(CONF_VERIFY_SSL, default=DEFAULT_VERIFY_SSL)] = (
                bool
            )

        return self.async_show_form(
            step_id="user",
            data_schema=vol.Schema(data_schema),
            errors=errors or {},
        )