fix: getting target temps when set to auto (piitaya#20)

closes piitaya#19

src/cards/thermostat-card/utils.ts

@@ -1,4 +1,5 @@
 import { formatNumber, HomeAssistant, UNIT_F } from "custom-card-helpers";
+import { supportsFeature } from "../../ha/common/entity/supports-feature";
 import { ClimateEntity } from "../../ha/data/climate";
 import { isNumber } from "../../utils/number";
 
@@ -16,10 +17,22 @@ export const getStepSize = (hass: HomeAssistant, entity: ClimateEntity): number
     return entity.attributes.target_temp_step ?? systemStep;
 };
 
+export const supportTargetTemperatureRange = (entity: ClimateEntity) => supportsFeature(entity, 2);
+
+export const supportsCoolOnly = (entity: ClimateEntity) => {
+    const modes = entity.attributes.hvac_modes;
+    return !modes.includes("heat") && modes.includes("cool");
+};
+
+export const supportsHeatOnly = (entity: ClimateEntity) => {
+    const modes = entity.attributes.hvac_modes;
+    return modes.includes("heat") && !modes.includes("cool");
+};
+
 export const getTargetTemps = (entity: ClimateEntity): [number | undefined, number | undefined] => {
     const { target_temp_high, target_temp_low, temperature } = entity.attributes;
 
-    if (entity.state === "heat") return [target_temp_low ?? temperature, undefined];
-    if (entity.state === "cool") return [undefined, target_temp_high ?? temperature];
-    return [target_temp_low, target_temp_high];
+    if (supportTargetTemperatureRange(entity)) return [target_temp_low, target_temp_high];
+    if (supportsHeatOnly(entity)) return [target_temp_low ?? temperature, undefined];
+    return [undefined, target_temp_high ?? temperature];
 };