What is the visa process for ordaining foreigner monks in Sri Lanka?

I heard that the monk candidates outside of Sri Lanka have to make two trips to Sri Lanka in order to get an extended visa. I would prefer just making one trip to Sri Lanka(in the future) being enough to get an extended visa to be able to ordain as a monk. Is there a special way that don't require the foreigner monk candidates to make two trips to Sri Lanka? Note: I would like to ask the same question for the foreigner monk candidates in Thailand but I heard that they don't accept foreigners to be monk there anymore. If anyone has any informations about the foreigner monk situation in Thailand I would be glad If they inform me.