--[[
    By: skylarsch
    Usage: room <length (9)> <width (9)> <height (5)>
    Each of the arguments are optional, but if you must specify all the values before the one you want to change.
--]]

-- MARK: Helper Functions
function fwd() -- Move forward
  while not turtle.forward() do
    turtle.dig()
  end
end
function move(ammount) -- Move forward by the number of blocks
  for i = 0, ammount, 1 do
    fwd()
  end
end
function refuel() -- Refuel the turtle if it needs it
  local slot = 1
  while turtle.getFuelLevel() < 50 do
    if slot > 16 then
      print("Failed to refuel turtle")
      turtle.select(1)
      return false
    end
    turtle.select(slot)
    if not turtle.refuel(1) then
      slot = slot + 1
    end
  end
  turtle.select(1)
  return true
end
function up()
  while not turtle.up() do
    turtle.digUp()
  end
end
function down()
  while not turtle.down() do
    turtle.digDown()
  end
end
function goDown(ammount)
  for i = 0, ammount, 1 do
    down()
  end
end
function makeFloor(l, w)
  for i = 0, w + 1, 1 do
    move(l)
    if (i % 2 == 0) then
      if i <= w then
        turtle.turnRight()
        fwd()
        turtle.turnRight()
      else
        turtle.turnLeft()
        move(w)
        turtle.turnLeft()
        move(l)
        turtle.turnLeft()
        turtle.turnLeft()
      end
    else
      if i <= w then
        turtle.turnLeft()
        fwd()
        turtle.turnLeft()
      else
        turtle.turnRight()
        move(w)
        turtle.turnRight()
      end
    end
    refuel()
  end
end

-- MARK: Main App
local argv = {...}
local length = (argv[1] or 54) - 2
local width  = (argv[2] or 35) - 2
local height = (argv[3] or 4) - 1

print("Creating Room:")
print("  "..(length + 2).."x"..(width + 2).."x"..(height + 1))

if not refuel() then
  print("Aborting...")
  return
end

for floor = 0, height, 1 do
  makeFloor(length, width)
  if floor < height then
    up()
  else
    goDown(height - 1)
  end
  if not refuel() then
    print("Aborting...")
    return
  end
end