Why did mr wonka congratulate charlie? How must have charlie reacted to the whole thing?

Wonka says how much he loves his chocolate factory, and asks if Charlie loves it, too. Charlie says it is the most wonderful place in the whole world, and in response, Wonka tells him he is giving him the entire factory as a gift as soon as he is old enough to run it. Grandpa Joe and Charlie are astounded, but Wonka explains that he is getting older and has no family to take over the factory when he is gone. He sent out the Golden Tickets so that he could find an heir.