config_flow.py

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"""Config flow for Bryant Evolution integration."""
 
from __future__ import annotations
 
import logging
from typing import Any
 
from evolutionhttp import BryantEvolutionLocalClient
import voluptuous as vol
 
from homeassistant.config_entries import ConfigFlow, ConfigFlowResult
from homeassistant.const import CONF_FILENAME
 
from .const import CONF_SYSTEM_ZONE, DOMAIN
 
_LOGGER = logging.getLogger(__name__)
 
STEP_USER_DATA_SCHEMA = vol.Schema(
    {
        vol.Required(CONF_FILENAME, default="/dev/ttyUSB0"): str,
    }
)
 
 
async def _enumerate_sz(tty: str) -> list[tuple[int, int]]:
    """Return (system, zone) tuples for each system+zone accessible through tty."""
    return [
        (system_id, zone.zone_id)
        for system_id in (1, 2)
        for zone in await BryantEvolutionLocalClient.enumerate_zones(system_id, tty)
    ]
 
 
class BryantConfigFlow(ConfigFlow, domain=DOMAIN):
    """Handle a config flow for Bryant Evolution."""
 
    async def async_step_user(
        self, user_input: dict[str, Any] | None = None
    ) -> ConfigFlowResult:
        """Handle the initial step."""
        errors: dict[str, str] = {}
        if user_input is not None:
            try:
                system_zone = await _enumerate_sz(user_input[CONF_FILENAME])
            except FileNotFoundError:
                _LOGGER.error("Could not open %s: not found", user_input[CONF_FILENAME])
                errors["base"] = "cannot_connect"
            else:
                if len(system_zone) != 0:
                    return self.async_create_entryasync_create_entryasync_create_entry(
                        title=f"SAM at {user_input[CONF_FILENAME]}",
                        data={
                            CONF_FILENAME: user_input[CONF_FILENAME],
                            CONF_SYSTEM_ZONE: system_zone,
                        },
                    )
                errors["base"] = "cannot_connect"
        return self.async_show_formasync_show_formasync_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:
        """Handle integration reconfiguration."""
        errors: dict[str, str] = {}
        if user_input is not None:
            system_zone = await _enumerate_sz(user_input[CONF_FILENAME])
            if len(system_zone) != 0:
                return self.async_update_reload_and_abortasync_update_reload_and_abort(
                    self._get_reconfigure_entry_get_reconfigure_entry(),
                    data={
                        CONF_FILENAME: user_input[CONF_FILENAME],
                        CONF_SYSTEM_ZONE: system_zone,
                    },
                )
            errors["base"] = "cannot_connect"
        return self.async_show_formasync_show_formasync_show_form(
            step_id="reconfigure",
            data_schema=STEP_USER_DATA_SCHEMA,
            errors=errors,
        )