-- When supplied, legacyCameraType is used and cameraMovementMode is ignored (should be nil anyways)
-- Next, if userCameraCreator is passed in, that is used as the cameraCreator


function CameraModule:ActivateCameraController( cameraMovementMode, legacyCameraType )
	local newCameraCreator = nil
	
	if legacyCameraType~=nil then
		--[[ 
			This function has been passed a CameraType enum value. Some of these map to the use of
			the LegacyCamera module, the value "Custom" will be translated to a movementMode enum
			value based on Dev and User settings, and "Scriptable" will disable the camera controller.
		--]]
		
		if legacyCameraType == Enum.CameraType.Scriptable then
			if self.activeCameraController then
				self.activeCameraController:Enable(false)
				self.activeCameraController = nil				
				return
			end
		elseif legacyCameraType == Enum.CameraType.Custom then
			cameraMovementMode = self:GetCameraMovementModeFromSettings()
			
		elseif legacyCameraType == Enum.CameraType.Track then
			-- Note: The TrackCamera module was basically an older, less fully-featured
			-- version of ClassicCamera, no longer actively maintained, but it is re-implemented in
			-- case a game was dependent on its lack of ClassicCamera's extra functionality.
			cameraMovementMode = Enum.ComputerCameraMovementMode.Classic
			
		elseif legacyCameraType == Enum.CameraType.Follow then
			cameraMovementMode = Enum.ComputerCameraMovementMode.Follow
			
		elseif legacyCameraType == Enum.CameraType.Orbital then
			cameraMovementMode = Enum.ComputerCameraMovementMode.Orbital
			
		elseif legacyCameraType == Enum.CameraType.Attach or
			   legacyCameraType == Enum.CameraType.Watch or
			   legacyCameraType == Enum.CameraType.Fixed then
			newCameraCreator = LegacyCamera
		else
			warn("CameraScript encountered an unhandled Camera.CameraType value: ",legacyCameraType)			
		end		
	end
	
	if not newCameraCreator then		
		if cameraMovementMode == Enum.ComputerCameraMovementMode.Classic or
			cameraMovementMode == Enum.ComputerCameraMovementMode.Follow or
			cameraMovementMode == Enum.ComputerCameraMovementMode.Default then
			newCameraCreator = ClassicCamera
		elseif cameraMovementMode == Enum.ComputerCameraMovementMode.Orbital then
			newCameraCreator = OrbitalCamera
		else
			warn("ActivateCameraController did not select a module.")
			return
		end
	end
	
	-- Create the camera control module we need if it does not already exist in instantiatedCameraControllers
	local newCameraController = nil
	if not instantiatedCameraControllers[newCameraCreator] then
		newCameraController = newCameraCreator.new()
		instantiatedCameraControllers[newCameraCreator] = newCameraController
	else
		newCameraController = instantiatedCameraControllers[newCameraCreator]
	end
	
	-- If there is a controller active and it's not the one we need, disable it,
	-- if it is the one we need, make sure it's enabled
	if self.activeCameraController then
		if self.activeCameraController ~= newCameraController then
			self.activeCameraController:Enable(false)
			self.activeCameraController = newCameraController
			self.activeCameraController:Enable(true)		
		elseif not self.activeCameraController:GetEnabled() then
			self.activeCameraController:Enable(true)
		end		
	elseif newCameraController ~= nil then
		self.activeCameraController = newCameraController
		self.activeCameraController:Enable(true)		
	end
	
	if self.activeCameraController then
		if cameraMovementMode~=nil then
			self.activeCameraController:SetCameraMovementMode(cameraMovementMode)
		elseif legacyCameraType~=nil then
			-- Note that this is only called when legacyCameraType is not a type that
			-- was convertible to a ComputerCameraMovementMode value, i.e. really only applies to LegacyCamera
			self.activeCameraController:SetCameraType(legacyCameraType)
		end
	end
end