local args = {...}
local Logging = require("logging")
local Logger = Logging.firstLoad(
  Logging.OUTPUTS.file("tunnel.log"),
  Logging.OUTPUTS.stdout()
)

local CHEST_SLOT = #args == 1 and tonumber(args[1]) or 1
if type(CHEST_SLOT) ~= "number" or CHEST_SLOT < 1 or CHEST_SLOT > 16 then
  Logger:error("Slot number is not valid:", CHEST_SLOT)
end
local CHEST_PICKUP = #args == 2 and (args[2]:lower() )

local CHEST_DETAIL = turtle.getItemDetail(CHEST_SLOT)
if CHEST_DETAIL == nil then
  Logger:error("No chest in slot! Quitting...")
  return
end
local CHEST_NAME = CHEST_DETAIL.name

local function refuel(minFuel)
  local fuelLevel = turtle.getFuelLevel()
  while fuelLevel < minFuel do
    Logger:debug("Checking fuel level:", fuelLevel)
    for i=1,16 do
      if turtle.getItemCount(i) > 0 then
        turtle.select(i)
        turtle.refuel()
      end
    end
    fuelLevel = turtle.getFuelLevel()
  end
  Logger:debug("Fuel level is sufficient:", fuelLevel)
  turtle.select(1)
end

local function isFull(minEmpty)
  local emptyCount = 0
  for i=1,16 do
    if i == CHEST_SLOT then
      goto continue
    end

    if turtle.getItemCount(i) == 0 then
      emptyCount = emptyCount + 1
      if emptyCount >= minEmpty then
        return false
      end
    end
      ::continue::
  end
  return true
end

local function handleFullInv(minEmpty)
  local didPlace = false

  -- Empty inventory
  while isFull(minEmpty) do
    if not didPlace then
      local detail = turtle.getItemDetail(CHEST_SLOT)
      if type(detail) ~= "table" or detail.name ~= CHEST_NAME then
        Logger:error("Can't find chest :(")
        os.sleep(5)
        goto continue
      end

      -- Try: place, check block above is empty or dig it, place
      -- If all fails, print error, wait and repeat
      if not (turtle.select(CHEST_SLOT) and (turtle.placeUp() or ((not turtle.inspectUp() or turtle.digUp()) and turtle.placeUp()))) then
        Logger:error("Can't place chest :(")
        os.sleep(5)
        goto continue
      end
      didPlace = true
    end

    for i=1,16 do
      if i == CHEST_SLOT then
        goto continue_SLOT
      end
      if turtle.getItemCount(i) > 0 and not (turtle.select(i) and turtle.dropUp()) then
        Logger:error("Couldn't drop items into chest!")
        goto continue
      end

        ::continue_SLOT::
    end

      ::continue::
  end

  if didPlace and CHEST_PICKUP then
    turtle.select(CHEST_SLOT)
    turtle.digUp()
  end
end

local function dig(checkRefuel)
  while not turtle.forward() do
    turtle.dig()
    checkRefuel()
  end
  turtle.digDown()
end

local function line(length, turn, checkRefuel)
  turtle.digDown()
  for i=2,length do
    dig(checkRefuel)
  end
  turn()
end

local function panel(width, length, leftFirst, checkRefuel, checkFullInv)
  Logger:trace("Panel:", width, length)
  local turn, otherTurn = leftFirst and turtle.turnLeft or turtle.turnRight, leftFirst and turtle.turnRight or turtle.turnLeft
  for i=2,width do
    checkFullInv()
    line(length, turn, checkRefuel)
    dig(checkRefuel)
    turn()
    turn, otherTurn = otherTurn, turn
  end
  line(length, turn, checkRefuel)
  turn()
end

local function rectPrism(depth, width, length, leftFirst)
  local refuelTarget = width * length * 1.5
  local function checkRefuel()
    refuel(refuelTarget)
  end
  local invEmptyTarget = 3
  local function checkFullInv()
    Logger:debug("Handling full inventory with target:", invEmptyTarget, " handled:", handleFullInv(invEmptyTarget))
  end
  Logger:trace("RectPrism:", depth, width, length)
  for i=1,depth do
    panel(width, length, leftFirst, checkRefuel, checkFullInv)
    while not turtle.down() do
      turtle.digDown()
      checkRefuel()
    end
    leftFirst = (not not leftFirst) ~= (width % 2 == 0)
  end
end

rectPrism(200, 16, 16)