Reenable animation after setloop to once

Questions
1

Hi guys
i have a simple animation when click on button to enable playing a clip

mmi.addHandler(‘Torus’,‘click’,function(mesh)
{

if(AnimationTrigger == true) {
	action = mixer.clipAction(clip);
	action.setLoop(THREE.LoopOnce);  
	AnimationTrigger = false;
	action.clampWhenFinished= true;
	action.play();
	console.log( AnimationTrigger );
	
	
}

else{

	AnimationTrigger = true;
	action.paused = false;
	action.timeScale = -1;
	action.play();
	console.log( AnimationTrigger );
	
}

})

a simple button clicks to play the animation and a second click to reverse it .
the animation works fine ( play and reverse ) but the issue i have is i need to use .setLoop(THREE.LoopOnce); to play the animation once, but if i click the button again to play the animation from start again it did not work
to be hosest i think ClampWhenFinished suposed to work alone logicley but Three.js documentation said we need to use it with LoopOnce

so how to activate play again after LoopOnce ??