SugarFarm computercraft.

enabled = true
col_length = 15
length = 5


function rowEnd()
	turtle.turnLeft()
	go()
	go()
	turtle.turnLeft()
end


function lineEnd()
	turtle.turnRight()
	go()
	turtle.turnRight()
end


function line()
	for i=1, col_length do
		go()
	end
end


function go()
	if turtle.detect() then
		turtle.dig()
	end
	turtle.forward()
	print("fuel: " .. turtle.getFuelLevel())
	harvest()
end


function harvest()
	turtle.suckDown()
	turtle.suckUp()
	turtle.suck()
end


function goHome()
	turtle.turnRight()
	for i = 1, (length * 3) - 2 do
		go()
	end
	turtle.turnRight()
end


function dock()
	--bank
	for i = 16,1,-1 do
		turtle.select(i)
		turtle.dropDown()
	end
	--refuel

	--wait for growth
	while (not turtle.detect() and (not detectRight())) do
		print('waiting for growth...')
		sleep(10)
	end
end


function detectRight()
	turtle.turnRight()
	isThere = turtle.detect()
	turtle.turnLeft()
	return isThere
end



while enabled do
	if (turtle.getFuelLevel() > 150) then
		for i = 1, length do
			line()
			lineEnd()
			line()
			if(i ~= length) then
			rowEnd()
			end
		end
		goHome()
		dock()
	else
		enabled = false
		print('out of fuel T.T')
	end
end