-- 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: Enum.CameraType?)
	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
			end
			return

		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			-- version of ClassicCamera, no longer actively maintained, but it is re-implemented in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 VRService.VREnabled then
			newCameraCreator = VRCamera
		elseif cameraMovementMode == Enum.ComputerCameraMovementMode.Classic or
			cameraMovementMode == Enum.ComputerCameraMovementMode.Follow or
			cameraMovementMode == Enum.ComputerCameraMovementMode.Default or
			cameraMovementMode == Enum.ComputerCameraMovementMode.CameraToggle then
			newCameraCreator = ClassicCamera
		elseif cameraMovementMode == Enum.ComputerCameraMovementMode.Orbital then
			newCameraCreator = OrbitalCamera
		else
			warn("ActivateCameraController did not select a module.")
			return
		end
	end

	local isVehicleCamera = self:ShouldUseVehicleCamera()
	if isVehicleCamera then
		if VRService.VREnabled then
			newCameraCreator = VRVehicleCamera
		else
			newCameraCreator = VehicleCamera
		end
	end

	-- Create the camera control module we need if it does not already exist in instantiatedCameraControllers
	local newCameraController
	if not instantiatedCameraControllers[newCameraCreator] then
		newCameraController = newCameraCreator.new()
		instantiatedCameraControllers[newCameraCreator] = newCameraController
	else
		newCameraController = instantiatedCameraControllers[newCameraCreator]
		if newCameraController.Reset then
			newCameraController:Reset()
		end
	end

	if self.activeCameraController then
		-- deactivate the old controller and activate the new one
		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
		-- only activate the new controller
		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

function CameraModule:OnCameraSubjectChanged()
	local camera = workspace.CurrentCamera
	local cameraSubject = camera and camera.CameraSubject

	if self.activeOcclusionModule then
		self.activeOcclusionModule:OnCameraSubjectChanged(cameraSubject)
	end

	self:ActivateCameraController(nil, camera.CameraType)
end

function CameraModule:OnCameraTypeChanged(newCameraType: Enum.CameraType)
	if newCameraType == Enum.CameraType.Scriptable then
		if UserInputService.MouseBehavior == Enum.MouseBehavior.LockCenter then
			CameraUtils.restoreMouseBehavior()
		end
	end

	-- Forward the change to ActivateCameraController to handle
	self:ActivateCameraController(nil, newCameraType)
end