void setSmoothLevel(double smoothLevel);

void setWhitenessLevel(double whitenessLevel);

void setRuddyLevel(double ruddyLevel);

void reset();

// Get singleton instance
final store = BaseBeautyStore.shared;
// Define listeners
late final VoidCallback smoothLevelListener = _onSmoothLevelChanged;
late final VoidCallback whitenessLevelListener = _onWhitenessLevelChanged;
late final VoidCallback ruddyLevelListener = _onRuddyLevelChanged;
void _onSmoothLevelChanged() {
    print('Smooth level: ${store.baseBeautyState.smoothLevel.value}');
}
void _onWhitenessLevelChanged() {
    print('Whiteness level: ${store.baseBeautyState.whitenessLevel.value}');
}
void _onRuddyLevelChanged() {
    print('Ruddy level: ${store.baseBeautyState.ruddyLevel.value}');
}
// Subscribe to state changes
store.baseBeautyState.smoothLevel.addListener(smoothLevelListener);
store.baseBeautyState.whitenessLevel.addListener(whitenessLevelListener);
store.baseBeautyState.ruddyLevel.addListener(ruddyLevelListener);
// Set beauty effects
store.setSmoothLevel(5.0);
store.setWhitenessLevel(3.0);
store.setRuddyLevel(2.0);
// Reset all beauty effects
store.reset();
// Unsubscribe when done
store.baseBeautyState.smoothLevel.removeListener(smoothLevelListener);
store.baseBeautyState.whitenessLevel.removeListener(whitenessLevelListener);
store.baseBeautyState.ruddyLevel.removeListener(ruddyLevelListener);