"""Config flow for Minecraft Server integration."""
import logging

import voluptuous as vol

from homeassistant.config_entries import ConfigFlow
from homeassistant.const import CONF_ADDRESS, CONF_NAME, CONF_TYPE
from homeassistant.data_entry_flow import FlowResult

from .api import MinecraftServer, MinecraftServerAddressError, MinecraftServerType
from .const import DEFAULT_NAME, DOMAIN

DEFAULT_ADDRESS = "localhost:25565"

_LOGGER = logging.getLogger(__name__)


class MinecraftServerConfigFlow(ConfigFlow, domain=DOMAIN):
    """Handle a config flow for Minecraft Server."""

    VERSION = 3

    async def async_step_user(self, user_input=None) -> FlowResult:
        """Handle the initial step."""
        errors = {}

        if user_input:
            address = user_input[CONF_ADDRESS]

            # Prepare config entry data.
            config_data = {
                CONF_NAME: user_input[CONF_NAME],
                CONF_ADDRESS: address,
            }

            # Some Bedrock Edition servers mimic a Java Edition server, therefore check for a Bedrock Edition server first.
            for server_type in MinecraftServerType:
                try:
                    api = await self.hass.async_add_executor_job(
                        MinecraftServer, server_type, address
                    )
                except MinecraftServerAddressError:
                    pass
                else:
                    if await api.async_is_online():
                        config_data[CONF_TYPE] = server_type
                        return self.async_create_entry(title=address, data=config_data)

                _LOGGER.debug(
                    "Connection check to %s server '%s' failed", server_type, address
                )

            # Host or port invalid or server not reachable.
            errors["base"] = "cannot_connect"

        # Show configuration form (default form in case of no user_input,
        # form filled with user_input and eventually with errors otherwise).
        return self._show_config_form(user_input, errors)

    def _show_config_form(self, user_input=None, errors=None) -> FlowResult:
        """Show the setup form to the user."""
        if user_input is None:
            user_input = {}

        return self.async_show_form(
            step_id="user",
            data_schema=vol.Schema(
                {
                    vol.Required(
                        CONF_NAME, default=user_input.get(CONF_NAME, DEFAULT_NAME)
                    ): str,
                    vol.Required(
                        CONF_ADDRESS,
                        default=user_input.get(CONF_ADDRESS, DEFAULT_ADDRESS),
                    ): vol.All(str, vol.Lower),
                }
            ),
            errors=errors,
        )