local RunService = game:GetService("RunService")
local Players = game:GetService("Players")

local platform = workspace:WaitForChild("MagicDisc")
local raycastDistance = 5
local previousPosition = platform.Position

local function setupVectorForce(character)
	local hrp = character:FindFirstChild("HumanoidRootPart")
	if not hrp then return end

	if not hrp:FindFirstChild("PlatformAttachment") then
		local attachment = Instance.new("Attachment")
		attachment.Name = "PlatformAttachment"
		attachment.Parent = hrp

		local force = Instance.new("VectorForce")
		force.Name = "PlatformForce"
		force.Attachment0 = attachment
		force.RelativeTo = Enum.ActuatorRelativeTo.World
		force.ApplyAtCenterOfMass = true
		force.Force = Vector3.zero
		force.Parent = hrp
	end
end

local function removeVectorForce(character)
	local hrp = character:FindFirstChild("HumanoidRootPart")
	if not hrp then return end
	local force = hrp:FindFirstChild("PlatformForce")
	local attachment = hrp:FindFirstChild("PlatformAttachment")
	if force then force:Destroy() end
	if attachment then attachment:Destroy() end
end

RunService.Heartbeat:Connect(function(dt)
	if dt == 0 then return end -- Prevent division by zero
	local currentPosition = platform.Position
	local platformVelocity = (currentPosition - previousPosition) / dt
	previousPosition = currentPosition

	for _, player in ipairs(Players:GetPlayers()) do
		local character = player.Character
		if not character then continue end

		local hrp = character:FindFirstChild("HumanoidRootPart")
		if not hrp then continue end

		-- Setup VectorForce if needed
		setupVectorForce(character)

		-- Raycast down to check if player is standing on the platform
		local rayOrigin = hrp.Position
		local rayDirection = Vector3.new(0, -raycastDistance, 0)

		local params = RaycastParams.new()
		params.FilterDescendantsInstances = {character}
		params.FilterType = Enum.RaycastFilterType.Blacklist

		local result = workspace:Raycast(rayOrigin, rayDirection, params)

		local onPlatform = result and result.Instance and result.Instance:IsDescendantOf(platform)

		local force = hrp:FindFirstChild("PlatformForce")
		if force then
			if onPlatform then
				-- Apply force = velocity * mass / dt
				local mass = character:GetMass()
				force.Force = platformVelocity * mass / dt
			else
				force.Force = Vector3.zero
			end
		end
	end
end)

-- Optional: Cleanup force when player leaves
Players.PlayerRemoving:Connect(function(player)
	local char = player.Character
	if char then removeVectorForce(char) end
end)

-- Optional: Set up for players who respawn
Players.PlayerAdded:Connect(function(player)
	player.CharacterAdded:Connect(function(character)
		task.wait(1) -- Let character load
		setupVectorForce(character)
	end)
end)