Q: Car turned off at a light (no warning signs) , all interior lights were still on. Tried turning it off then back on, all lights ca

When stopped at a ligh (Auto stop) car will shut completely off (all lights, radio ) before starting when switching foot from break to gas. Then one day while at a stop light all dash lights and radio was still on but car engine was completely off and would not move. Turned car off and back on still Nothing. Then interior lights started to blink every warning sign came across the dash (need oil, stabilitrack, battery low, battery charge, check engine, etc) .. no warning signs were on before this . Then everything stopped car wouldn’t do anything just a click sound when attempting to start. After about a hour car started and drove just fine for over a week no issues. Now doing the exact same thing will not start. What could be the issue?

My car has 46000 miles.
My car has an automatic transmission.