Cranks but will not start

My car shut off while driving down the road. The throttle cable broke so I thought it was that, replaced it and only cranks. So I took the cover off over spark plugs and see there was oil all around them realized I needed a new valve cover gasket, so got that plugs and wires soaked up all the oil around the plugs. Then changed everything after that still would only crank. I checked fuel pump and that is fine. I have compression but not sure if it is getting a spark or if my battery not getting enough juice. The battery light always on. Any help would be appreciated thanks in advance.

Robert