local tArgs = { ... }

function showHelp()
	print("Usage:")
	print("stripmine <length> <deep>")
	print("length > 0")
	print("deep > -1")
	print("if deep is empty: deep = 5")
end

if #tArgs == 1 then
	if tArgs[1] == "help" or tArgs[1] == "?" then
		showHelp()
		return
	end
	length = tArgs[1]
	deep = 5
elseif #tArgs == 2 then
	length = tArgs[1]
	deep = tArgs[2]
	if length < "1" and deep < "0" then
		print("length > 0")
		print("deep >= 0")
		return
	end
else
	showHelp()
	return
end

function forward(a)
	for i=1,a do
		while turtle.forward() == false do
			turtle.attack()
			turtle.dig()
		end
	end	
end

function right(a)
	for i=1,a do
		turtle.turnRight()
	end
end

function left(a)
	for i=1,a do
		turtle.turnLeft()
	end
end

function dig(a)
	for i=1,a do
		lava()
		while turtle.detect()==true or turtle.forward() == false do 
			turtle.dig() 
			turtle.attack()
			sleep(0.3)
		end

		while turtle.detectUp()==true do 
			turtle.attackUp()
			turtle.digUp() 
			sleep(0.4)
		end
	end
end

function drop()
	for i=1,14 do
		turtle.select(i)
		turtle.drop()
	end
	turtle.select(1)
end

function lava()
    if turtle.getItemCount(15)>0 then
	turtle.select(15)
	turtle.place()
	if turtle.refuel() == false then
		--Whatever we picked up is invalid for fuel, put it back down
		turtle.place()
	end
	turtle.placeDown()
	if turtle.refuel() == false then
		--Whatever we picked up is invalid for fuel, put it back down
		turtle.placeDown()
	end
	turtle.placeUp()
	if turtle.refuel() == false then
		--Whatever we picked up is invalid for fuel, put it back down
		turtle.placeUp()
	end
	turtle.select(1)
    end
end

for j=1,length do
	print(j," of ", length)
	dig(3)
	turtle.back()
	turtle.select(16)
	turtle.placeUp()
	turtle.forward()
	right(1)
	dig(deep)
	left(2)
	forward(deep)
	dig(deep)
	right(2)
	forward(deep)
	left(1)
	if (j % 10) == 0 then
		right(2)
		forward(j*3)
		left(1)
		drop()
		left(1)
		forward(j*3)
	end
end
right(2)
forward(length*3)
left(1)
drop()
left(1)