Add lightplatform to Duotecno (#97582)

* add light platform

* Add light to coveragerc

* Update homeassistant/components/duotecno/light.py

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

* Update homeassistant/components/duotecno/light.py

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

* Update homeassistant/components/duotecno/light.py

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

* Update homeassistant/components/duotecno/light.py

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

* Update homeassistant/components/duotecno/light.py

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

* Update homeassistant/components/duotecno/light.py

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

* comments

* revert

* re-implement comments

---------

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

.coveragerc

@@ -234,6 +234,7 @@ omit =
     homeassistant/components/duotecno/entity.py
     homeassistant/components/duotecno/switch.py
     homeassistant/components/duotecno/cover.py
+    homeassistant/components/duotecno/light.py
     homeassistant/components/dwd_weather_warnings/const.py
     homeassistant/components/dwd_weather_warnings/coordinator.py
     homeassistant/components/dwd_weather_warnings/sensor.py

homeassistant/components/duotecno/__init__.py

@@ -11,7 +11,7 @@ from homeassistant.exceptions import ConfigEntryNotReady
 
 from .const import DOMAIN
 
-PLATFORMS: list[Platform] = [Platform.SWITCH, Platform.COVER]
+PLATFORMS: list[Platform] = [Platform.SWITCH, Platform.COVER, Platform.LIGHT]
 
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:

homeassistant/components/duotecno/light.py

@@ -0,0 +1,69 @@
+"""Support for Duotecno lights."""
+from typing import Any
+
+from duotecno.unit import DimUnit
+
+from homeassistant.components.light import (
+    ATTR_BRIGHTNESS,
+    ColorMode,
+    LightEntity,
+)
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant
+from homeassistant.exceptions import HomeAssistantError
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+
+from .const import DOMAIN
+from .entity import DuotecnoEntity
+
+
+async def async_setup_entry(
+    hass: HomeAssistant,
+    entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
+    """Set up Duotecno light based on config_entry."""
+    cntrl = hass.data[DOMAIN][entry.entry_id]
+    async_add_entities(DuotecnoLight(channel) for channel in cntrl.get_units("DimUnit"))
+
+
+class DuotecnoLight(DuotecnoEntity, LightEntity):
+    """Representation of a light."""
+
+    _unit: DimUnit
+    _attr_color_mode = ColorMode.BRIGHTNESS
+    _attr_supported_color_modes = {ColorMode.BRIGHTNESS}
+
+    @property
+    def is_on(self) -> bool:
+        """Return true if the light is on."""
+        return self._unit.is_on()
+
+    @property
+    def brightness(self) -> int:
+        """Return the brightness of the light."""
+        return int((self._unit.get_dimmer_state() * 255) / 100)
+
+    async def async_turn_on(self, **kwargs: Any) -> None:
+        """Instruct the light to turn on."""
+        if (val := kwargs.get(ATTR_BRIGHTNESS)) is not None:
+            # set to a value
+            val = max(int((val * 100) / 255), 1)
+        else:
+            # restore state
+            val = None
+        try:
+            await self._unit.set_dimmer_state(val)
+        except OSError as err:
+            raise HomeAssistantError(
+                "Transmit for the set_dimmer_state packet failed"
+            ) from err
+
+    async def async_turn_off(self, **kwargs: Any) -> None:
+        """Instruct the light to turn off."""
+        try:
+            await self._unit.set_dimmer_state(0)
+        except OSError as err:
+            raise HomeAssistantError(
+                "Transmit for the set_dimmer_state packet failed"
+            ) from err