Scripts

Recently, I implemented an increase in the heroes' vision range using scripts (it didn't work through DefaultStats and types). This was done through the OpenCircleFog script, attached to a trigger emulator that activates when heroes move. And now, a question: Is it possible to hide part of the map from the player using scripts? And a second question: Is it possible to build a city twice in one turn? In other words, is it possible to unlock a city? And a third question: Is it possible to detect when a hero interacts with a caravan?