enchanting turtle v0

local bookSlot = 1

local lootSlotStart = 2
local lootSlotEnd = 16

local xpSide = "right"
local grinderSide = "left"
local manualSide  = "back"

local xp = peripheral.wrap(xpSide)

local enchantLevel = 30
local levelLow = 60
local levelHigh = 120


main()


function checkBooks()
  if turtle.getItemCount(bookSlot) < 2 then
    turtle.select(bookSlot)
    turtle.suckUp()
    if turtle.getItemCount(bookSlot) < 2 then
      return false
    end
  end

  return true
end

function setGrind(isGrind)
  redstone.setOutput(grinderSide, isGrind)
end

function checkXP()
  local level = xp.getLevels()
  if level <= levelLow then
    setGrind(true)
  elseif level >= levelHigh then
    setGrind(false)
  end

  return level >= enchantLevel
end

function clearInv()
  for i = lootSlotStart, lootSlotEnd do
    turtle.select(i)
    turtle.dropDown()
  end
  turtle.select(bookSlot)
end

function enchant()
  turtle.select(bookSlot)
  xp.enchant(enchantLevel)
  clearInv()
end

function setManual(isManual)
  if isManual then
    setGrind(false)
    xp.setAutoCollect(false)
  else
    xp.setAutoCollect(true)
  end
end

function isManualSignal()
  return redstone.getInput(manualSide)
end

function main()
  clearInv()
  while true do
    if isManualSignal() then
      setManual(true)
      sleep(1)
    else
      setManual(false)
      if checkXP() and checkBooks() then
        enchant()
      else
        sleep(5)
      end
    end
  end
end