I'd start by checking your r. side sunroof drains. Open the sunroof and carefully pour water into the outer part between the rail and roof edge. Water should then drain from both the front and back of the car, 2 drains per side. If the drains are not clogged, the bottom part of the sunroof assembly itself could be cracked as I've seen that once before but rare.

Another possibility is that perhaps your AC evap drain hose isn't properly hooked up under the radio. If the evap was ever replaced, the "tech" might have forgotten to re-install that hose thus the water will flood your interior instead of drain outside whenever the ACs on. I've seen that happen as well. To see that drain tube, you'll need to pull the carpet back and remove the plastic partition behind it on the r. side of the center console tunnel (but in front of the center console). That tube must be connected to a hole in the center of that tunnel area, below the radio.