Need help with a Preview enabled warning script

Hi ,
I had no luck finding help in the ideas forum category so i try here..
The idea is to display a different surface on a device whether Preview is on or off
gathering piece of code here and there i managed to display a surface with preview on and log preview off , but as soon as i add the second surface for preview off , everything goes sideways..

here what i have :

this works :

//Button
var previewAutomationBtn = sf.ui.proTools.automationWindow.buttons.whoseTitle.is('Enable Auto Preview Mode').first;

//Check if button is enabled
if (previewAutomationBtn.invalidate().value.value == "Selected") {
sf.surfaces.get('user:cl1tm5xan000cng10ohmfnl97:cl1tm65u1000dng10tv58qn5w').open({
    device: sf.devices.mobile.getByDeviceId('mobile.25bbc8803fdd3389--Galaxy-S9-de-Lucas'),
});
} else {
    log("Automation Preview is not enabled");
}; 

but this doesn't :

sf.ui.proTools.appActivateMainWindow();

//Button
var previewAutomationBtn = sf.ui.proTools.automationWindow.buttons.whoseTitle.is('Enable Auto Preview Mode').first;

//Check if button is enabled
if (previewAutomationBtn.invalidate().value.value == "Selected") {
sf.surfaces.get('user:cl1tm5xan000cng10ohmfnl97:cl1tm65u1000dng10tv58qn5w').open({
    device: sf.devices.mobile.getByDeviceId('mobile.25bbc8803fdd3389--Galaxy-S9-de-Lucas'),
});
} else {
 sf.surfaces.get('user:cl1tm5xan000cng10ohmfnl97:cl1tmex7x000lng109pifex9x').open({
    device: sf.devices.mobile.getByDeviceId('mobile.25bbc8803fdd3389--Galaxy-S9-de-Lucas'),
});

I suspect it's coding basics but that where i am at..

for now my the script is set to an application trigger but is there a way to SF to monitor the preview state constantly? without making everything buggy or slow obviously?

link to the original thread :

i 'm don't know java at all to any help pointing me in the right direction would deeply appreciated..

Thanks all!

Lucas