Leaving San Diego Amtrak at 4 am to transfer in Los Angeles

I need to arrive SD Amtrak at least 30 minutes prior to departure at 4:01 am.

What is the best way to arrive at the station by 3:30 am on a Friday morning?

If Lyft or Uber - how far in advance would you book a ride to guarantee a ride?

Taxi's available at that hour?

Any nearby 24 hour restaurants to hang out since hours are

12:00 AM - 1:00 AM

3:00 AM - 11:59 PM