Add unknown tuya modes as presets (#82056)

Fixes https://github.com/home-assistant/core/issues/81681
fixes undefined

homeassistant/components/tuya/climate.py

@@ -25,7 +25,7 @@ from homeassistant.helpers.entity_platform import AddEntitiesCallback
 
 from . import HomeAssistantTuyaData
 from .base import IntegerTypeData, TuyaEntity
-from .const import DOMAIN, LOGGER, TUYA_DISCOVERY_NEW, DPCode, DPType
+from .const import DOMAIN, TUYA_DISCOVERY_NEW, DPCode, DPType
 
 TUYA_HVAC_TO_HA = {
     "auto": HVACMode.HEAT_COOL,
@@ -205,10 +205,19 @@ class TuyaClimateEntity(TuyaEntity, ClimateEntity):
             DPCode.MODE, dptype=DPType.ENUM, prefer_function=True
         ):
             self._attr_hvac_modes = [HVACMode.OFF]
-            for tuya_mode, ha_mode in TUYA_HVAC_TO_HA.items():
+            unknown_hvac_modes: list[str] = []
-                if tuya_mode in enum_type.range:
+            for tuya_mode in enum_type.range:
+                if tuya_mode in TUYA_HVAC_TO_HA:
+                    ha_mode = TUYA_HVAC_TO_HA[tuya_mode]
                     self._hvac_to_tuya[ha_mode] = tuya_mode
                     self._attr_hvac_modes.append(ha_mode)
+                else:
+                    unknown_hvac_modes.append(tuya_mode)
+
+            if unknown_hvac_modes:  # Tuya modes are presets instead of hvac_modes
+                self._attr_hvac_modes.append(description.switch_only_hvac_mode)
+                self._attr_preset_modes = unknown_hvac_modes
+                self._attr_supported_features |= ClimateEntityFeature.PRESET_MODE
         elif self.find_dpcode(DPCode.SWITCH, prefer_function=True):
             self._attr_hvac_modes = [
                 HVACMode.OFF,
@@ -263,18 +272,6 @@ class TuyaClimateEntity(TuyaEntity, ClimateEntity):
         """Call when entity is added to hass."""
         await super().async_added_to_hass()
 
-        # Log unknown modes
-        if enum_type := self.find_dpcode(
-            DPCode.MODE, dptype=DPType.ENUM, prefer_function=True
-        ):
-            for tuya_mode in enum_type.range:
-                if tuya_mode not in TUYA_HVAC_TO_HA:
-                    LOGGER.warning(
-                        "Unknown HVAC mode '%s' for device %s; assuming it as off",
-                        tuya_mode,
-                        self.device.name,
-                    )
-
     def set_hvac_mode(self, hvac_mode: HVACMode) -> None:
         """Set new target hvac mode."""
         commands = [{"code": DPCode.SWITCH, "value": hvac_mode != HVACMode.OFF}]
@@ -284,6 +281,11 @@ class TuyaClimateEntity(TuyaEntity, ClimateEntity):
             )
         self._send_command(commands)
 
+    def set_preset_mode(self, preset_mode):
+        """Set new target preset mode."""
+        commands = [{"code": DPCode.MODE, "value": preset_mode}]
+        self._send_command(commands)
+
     def set_fan_mode(self, fan_mode: str) -> None:
         """Set new target fan mode."""
         self._send_command([{"code": DPCode.FAN_SPEED_ENUM, "value": fan_mode}])
@@ -420,8 +422,24 @@ class TuyaClimateEntity(TuyaEntity, ClimateEntity):
         ) is not None and mode in TUYA_HVAC_TO_HA:
             return TUYA_HVAC_TO_HA[mode]
 
+        # If the switch is on, and the mode does not match any hvac mode.
+        if self.device.status.get(DPCode.SWITCH, False):
+            return self.entity_description.switch_only_hvac_mode
+
         return HVACMode.OFF
 
+    @property
+    def preset_mode(self) -> str | None:
+        """Return preset mode."""
+        if DPCode.MODE not in self.device.function:
+            return None
+
+        mode = self.device.status.get(DPCode.MODE)
+        if mode in TUYA_HVAC_TO_HA:
+            return None
+
+        return mode
+
     @property
     def fan_mode(self) -> str | None:
         """Return fan mode."""