Add config flow for Daikin (#19182)

* config flow for daikin

* tox test

* return fixes

* tox test fixes

* tox formatting

homeassistant/components/daikin/config_flow.py

@@ -0,0 +1,74 @@
+"""Config flow for the Daikin platform."""
+import asyncio
+import logging
+
+import async_timeout
+import voluptuous as vol
+
+from homeassistant import config_entries
+
+from .const import KEY_HOST, KEY_IP, KEY_MAC
+
+_LOGGER = logging.getLogger(__name__)
+
+
+@config_entries.HANDLERS.register('daikin')
+class FlowHandler(config_entries.ConfigFlow):
+    """Handle a config flow."""
+
+    VERSION = 1
+    CONNECTION_CLASS = config_entries.CONN_CLASS_LOCAL_POLL
+
+    async def _create_entry(self, host, mac):
+        """Register new entry."""
+        # Check if mac already is registered
+        for entry in self._async_current_entries():
+            if entry.data[KEY_MAC] == mac:
+                return self.async_abort(reason='already_configured')
+
+        return self.async_create_entry(
+            title=host,
+            data={
+                KEY_HOST: host,
+                KEY_MAC: mac
+            })
+
+    async def _create_device(self, host):
+        """Create device."""
+        from pydaikin.appliance import Appliance
+        try:
+            with async_timeout.timeout(10):
+                device = await self.hass.async_add_executor_job(
+                    Appliance, host)
+        except asyncio.TimeoutError:
+            return self.async_abort(reason='device_timeout')
+        except Exception:  # pylint: disable=broad-except
+            _LOGGER.exception("Unexpected error creating device")
+            return self.async_abort(reason='device_fail')
+
+        mac = device.values.get('mac')
+        return await self._create_entry(host, mac)
+
+    async def async_step_user(self, user_input=None):
+        """User initiated config flow."""
+        if user_input is None:
+            return self.async_show_form(
+                step_id='user',
+                data_schema=vol.Schema({
+                    vol.Required(KEY_HOST): str
+                })
+            )
+        return await self._create_device(user_input[KEY_HOST])
+
+    async def async_step_import(self, user_input):
+        """Import a config entry."""
+        host = user_input.get(KEY_HOST)
+        if not host:
+            return await self.async_step_user()
+        return await self._create_device(host)
+
+    async def async_step_discovery(self, user_input):
+        """Initialize step from discovery."""
+        _LOGGER.info("Discovered device: %s", user_input)
+        return await self._create_entry(user_input[KEY_IP],
+                                        user_input[KEY_MAC])