feat: add different brightness ramping mechanisms

custom_components/adaptive_lighting/const.py

@@ -142,6 +142,30 @@
     " for later real sunsets. 🌇"
 )
 
+CONF_BRIGHTNESS_MODE, DEFAULT_BRIGHTNESS_MODE = "brightness_mode", "default"
+DOCS[CONF_BRIGHTNESS_MODE] = (
+    "Brightness mode to use. Possible values are `default`, `linear`, and `tanh` "
+    "(uses `brightness_ramp_time_before` and `brightness_ramp_time_after`). 📈"
+)
+CONF_BRIGHTNESS_RAMP_BEFORE, DEFAULT_BRIGHTNESS_RAMP_TIME_BEFORE = (
+    "brightness_ramp_time_before",
+    3600,
+)
+DOCS[CONF_BRIGHTNESS_RAMP_BEFORE] = (
+    "(Ignored if `brightness_mode='default'`) The duration (in seconds) to ramp up/down "
+    "the brightness before sunrise/sunset. The brightness starts changing at this many seconds "
+    "before the sunset/sunrise 📈📉"
+)
+CONF_BRIGHTNESS_RAMP_AFTER, DEFAULT_BRIGHTNESS_RAMP_TIME_AFTER = (
+    "brightness_ramp_time_after",
+    3600,
+)
+DOCS[CONF_BRIGHTNESS_RAMP_AFTER] = (
+    "(Ignored if `brightness_mode='default'`) The duration (in seconds) to ramp up/down "
+    "the brightness after sunrise/sunset. The brightness starts changing at this many seconds "
+    "after the sunset/sunrise 📈📉."
+)
+
 CONF_TAKE_OVER_CONTROL, DEFAULT_TAKE_OVER_CONTROL = "take_over_control", True
 DOCS[CONF_TAKE_OVER_CONTROL] = (
     "Disable Adaptive Lighting if another source calls `light.turn_on` while lights "