local tArgs = {...}
local distance = tonumber(tArgs[1])

if #tArgs ~= 1 then
	print( "Usage: Dig <distance>" )
	return
end

local hasMoved = tonumber(0)
local toMove = tonumber(distance*2 - hasMoved)
local Home = tonumber(0)

function fuel()
	local fuelLevel = turtle.getFuelLevel()
	if fuelLevel == "unlimited" then
		return true
	end

	if fuelLevel > 100 then
		return true
	end

	if fuelLevel < 100 then
		if hasMoved < distance then
			turtle.turnLeft()
			turtle.turnLeft()
			for i=1, hasMoved do
				turtle.forward()
				Home = Home + 1

			end
		end
		if hasMoved > distance then
			turtle.down()
			for i=1, toMove do
				turtle.forward()
				Home = Home + 1
			end
		end
	end

	if Home == toMove or hasMoved then
	term.clear()
	term.setCursorPos(1,1)
		print("Out of fuel. Please refuel me")
		print("Place Fuel in First (1) Slot!!!")
		print("I will restart myself")

		turtle.select(1)
		while fuelLevel < 100 do
			turtle.refuel(64)
			sleep(3)
			turtle.turnLeft()
			turtle.turnLeft()
			shell.run("Dig", distance)
		end
	end
end

function digNormal()
	for i=1, distance do
	fuel()
		turtle.dig()
		turtle.turnLeft()
		turtle.dig()
		turtle.turnRight()
		turtle.turnRight()
		turtle.dig()
		turtle.turnLeft()
		turtle.forward()
		hasMoved = hasMoved + 1
	end
end

function digTop()
	for i=1, distance do
	fuel()
		turtle.dig()
		turtle.digUp()
		turtle.turnLeft()
		turtle.dig()
		turtle.turnRight()
		turtle.turnRight()
		turtle.dig()
		turtle.turnLeft()
		turtle.forward()
		hasMoved = hasMoved + 1
	end
end

function digUp()
	turtle.digUp()
	turtle.up()
	turtle.turnLeft()
	turtle.turnLeft()
end

print("I'm going to mine "..distance.." from here")
sleep(2)
print("I'm off be back soon")


term.clear()
term.setCursorPos(1,1)
digNormal()
digUp()
digTop()