-- Choose current Touch control module based on settings (user, dev)
-- Returns module (possibly nil) and success code to differentiate returning nil due to error vs Scriptable


function ControlModule:SelectTouchModule(): ({}?, boolean)
	if not UserInputService.TouchEnabled then
		return nil, false
	end
	local touchModule
	local DevMovementMode = Players.LocalPlayer.DevTouchMovementMode
	if DevMovementMode == Enum.DevTouchMovementMode.UserChoice then
		touchModule = movementEnumToModuleMap[UserGameSettings.TouchMovementMode]
	elseif DevMovementMode == Enum.DevTouchMovementMode.Scriptable then
		return nil, true
	else
		touchModule = movementEnumToModuleMap[DevMovementMode]
	end
	return touchModule, true
end

local function calculateRawMoveVector(humanoid: Humanoid, cameraRelativeMoveVector: Vector3): Vector3
	local camera = Workspace.CurrentCamera
	if not camera then
		return cameraRelativeMoveVector
	end

	if humanoid:GetState() == Enum.HumanoidStateType.Swimming then
		return camera.CFrame:VectorToWorldSpace(cameraRelativeMoveVector)
	end
	
	local cameraCFrame = camera.CFrame
	
	if VRService.VREnabled and FFlagUserFlagEnableNewVRSystem and humanoid.RootPart then
		-- movement relative to VR frustum
		local cameraDelta = humanoid.RootPart.CFrame.Position - cameraCFrame.Position
		if cameraDelta.Magnitude < 3 then -- "nearly" first person
			local vrFrame = VRService:GetUserCFrame(Enum.UserCFrame.Head)
			cameraCFrame = cameraCFrame * vrFrame
		end
	end

	local c, s
	local _, _, _, R00, R01, R02, _, _, R12, _, _, R22 = cameraCFrame:GetComponents()
	if R12 < 1 and R12 > -1 then
		-- X and Z components from back vector.
		c = R22
		s = R02
	else
		-- In this case the camera is looking straight up or straight down.
		-- Use X components from right and up vectors.
		c = R00
		s = -R01*math.sign(R12)
	end
	local norm = math.sqrt(c*c + s*s)
	return Vector3.new(
		(c*cameraRelativeMoveVector.x + s*cameraRelativeMoveVector.z)/norm,
		0,
		(c*cameraRelativeMoveVector.z - s*cameraRelativeMoveVector.x)/norm
	)
end

function ControlModule:OnRenderStepped(dt)
	if self.activeController and self.activeController.enabled and self.humanoid then
		-- Give the controller a chance to adjust its state
		self.activeController:OnRenderStepped(dt)

		-- Now retrieve info from the controller
		local moveVector = self.activeController:GetMoveVector()
		local cameraRelative = self.activeController:IsMoveVectorCameraRelative()

		local clickToMoveController = self:GetClickToMoveController()
		if self.activeController ~= clickToMoveController then
			if moveVector.magnitude > 0 then
				-- Clean up any developer started MoveTo path
				clickToMoveController:CleanupPath()
			else
				-- Get move vector for developer started MoveTo
				clickToMoveController:OnRenderStepped(dt)
				moveVector = clickToMoveController:GetMoveVector()
				cameraRelative = clickToMoveController:IsMoveVectorCameraRelative()
			end
		end

		-- Are we driving a vehicle ?
		local vehicleConsumedInput = false
		if self.vehicleController then
			moveVector, vehicleConsumedInput = self.vehicleController:Update(moveVector, cameraRelative, self.activeControlModule==Gamepad)
		end

		-- If not, move the player
		-- Verification of vehicleConsumedInput is commented out to preserve legacy behavior,
		-- in case some game relies on Humanoid.MoveDirection still being set while in a VehicleSeat
		--if not vehicleConsumedInput then
			if cameraRelative then
				moveVector = calculateRawMoveVector(self.humanoid, moveVector)
			end
			self.moveFunction(Players.LocalPlayer, moveVector, false)
		--end

		-- And make them jump if needed
		self.humanoid.Jump = self.activeController:GetIsJumping() or (self.touchJumpController and self.touchJumpController:GetIsJumping())
	end
end

function ControlModule:OnHumanoidSeated(active: boolean, currentSeatPart: BasePart)
	if active then
		if currentSeatPart and currentSeatPart:IsA("VehicleSeat") then
			if not self.vehicleController then
				self.vehicleController = self.vehicleController.new(CONTROL_ACTION_PRIORITY)
			end
			self.vehicleController:Enable(true, currentSeatPart)
		end
	else
		if self.vehicleController then
			self.vehicleController:Enable(false, currentSeatPart)
		end
	end
end

function ControlModule:OnCharacterAdded(char)
	self.humanoid = char:FindFirstChildOfClass("Humanoid")
	while not self.humanoid do
		char.ChildAdded:wait()
		self.humanoid = char:FindFirstChildOfClass("Humanoid")
	end

	self:UpdateTouchGuiVisibility()

	if self.humanoidSeatedConn then
		self.humanoidSeatedConn:Disconnect()
		self.humanoidSeatedConn = nil
	end
	self.humanoidSeatedConn = self.humanoid.Seated:Connect(function(active, currentSeatPart)
		self:OnHumanoidSeated(active, currentSeatPart)
	end)
end

function ControlModule:OnCharacterRemoving(char)
	self.humanoid = nil

	self:UpdateTouchGuiVisibility()
end

function ControlModule:UpdateTouchGuiVisibility()
	if self.touchGui then
		local doShow = self.humanoid and GuiService.TouchControlsEnabled
		self.touchGui.Enabled = not not doShow -- convert to bool
	end
end