Loss of controls; no power steering, no brakes and no gas/throttle control?

I just had an oil change, was driving home and had to turn on my lights to go through a tunnel. I noticed when I turned my lights on that if I let off the gas pedal at all, it was a little rough when dropping RPMs to the idle. I get to a stop light where I’m about to turn and my car is idling horribly, then when I go to turn, I have no power steering, no brakes, and no gas/throttle control. I also noticed the oil light and battery light came on. I coast in neutral until I come to a stop because I had no brakes or gas. I moved the car from neutral to park. It’s idling rough still. I then turn off my headlights, the cars idle goes back to normal and not rough, I have brakes, power steering, and gas/throttle control again. I get to where I need, turn the lights back on just to see and it instantly drops the idle rpm’s and starts idling rough. Turn the lights off and it goes back to normal. The car has a lot of miles on it but has been kept in great service car. Not late for oil changes, fluids are kept at the right levels, serviced when needed.