2000 Opel Corsa Engine overheated and water leaks from the

Hie, iwas driving my car in the freeway then it started giving funny sounds, the next thing smoke was coming out from the bonnet and even into the drivers side, then I stopped. I noticed water was leeking from under the car (the bonnet)and the water tank was empty. My car wouldnt start any more, and the radiator fan wont turn wn I turn on the engine. Wn I try to fill the water tank, all the water leaks out under the car. So basically my car wont start at all. Can any1 help me please, tell me what is wrong and wht I need to do or replace.