Hotel WiFi hotspot, buy WiFi with creditcard, mikrotik radius server

Our hotel sell WiFi internet access to tourists. We want that tourists would be able to buy access to WiFi just by entering there credit card details. So there would be no need in going to reception and receive login details. At this moment we use mikrotik router. In order to give access to all hotel area we will need to add AP. There also should be possibility to add login details of new user manually.