-- Passive slaves which will get the right items from an external source (eg: diamond pipe)
-- Slaves should be aligned with the master


local args = { ... }
local item = args[1]
local threshold = 5

local function count_total()
	local c = 0
	for i = 1, 9 do c = c + turtle.getItemCount(i) end
	return c
end

rednet.open("right")
while true do
	-- we are using wireless to get the distance
	-- so the master should be aligned with the slaves
	local id, mess, dist = rednet.receive()
	if mess == args[1] then
		if count_total() < threshold then
			rednet.send(id, "empty")
		else
			rednet.send(id, "ack")

			-- GO!!!
			turtle.down()
			for i = 1, dist do turtle.forward() end

			print("I will leave again in 5 seconds...")
			sleep(5)
			print("Bye!")

			for i = 1, dist do turtle.back() end
			turtle.up()
			rednet.send(id, "return")
			print("Back home :)")
		end
	end
end