local SLOT_COUNT = 16

local width, depth = 10, 10

local direction = 1

if(#arg == 2) then
  width = tonumber(arg[1])
  depth = tonumber(arg[2])
else
  print("Malformed, default to 10 10")
end

DROPPED_ITEMS = {
  "minecraft:stone",
  "minecraft:dirt",
  "minecraft:cobblestone",
  "minecraft:sand",
  "minecraft:gravel",
  "minecraft:redstone",
  "minecraft:flint",
  "railcraft:ore_metal",
  "extrautils2:ingredients",
  "minecraft:dye",
  "thaumcraft:nugget",
  "thaumcraft:crystal_essence",
  "thermalfoundation:material",
  "projectred-core:resource_item",
  "thaumcraft:ore_cinnabar",
  "deepresonance:resonating_ore",
  "forestry:apatite"
}

function manageInventory()

  for slot = 1, SLOT_COUNT, 1 do
    local item = turtle.getItemDetail(slot)
    if(item ~= nil) then
      for filterIndex = 1, #DROPPED_ITEMS, 1 do
        if(item["name"] == DROPPED_ITEMS[filterIndex]) then
          turtle.select(slot)
          turtle.dropDown()
        end
      end
    end
  end

  for slot = 1, SLOT_COUNT, 1 do
    local item = turtle.getItemDetail(slot)
    if(item ~= nil) then
      for slot2 = 1, SLOT_COUNT, 1 do
        local item2 = turtle.getItemDetail(slot2)
        if(item2 ~= nil) then
          if(slot ~= slot2 and item["name"] == item2["name"]) then
            turtle.select(slot2)
            turtle.transferTo(slot2)
          end
        end
      end
    end
  end

end

function checkFuel()
  turtle.select(1)

  if(turtle.getFuelLevel() < 50) then
    for slot = 1, SLOT_COUNT, 1 do
      if(turtle.refuel(1)) then
        return true
      end
    end

    return false
  else
    return true
  end
end

function doMine()
  turtle.dig()
  turtle.digUp()
  turtle.digDown()
end

function boot()
  for col = 1, width, 1 do
    for row = 1, depth, 1 do
      if(checkFuel()) then
        turtle.forward()
        doMine()
      end
    end

    if(direction == 1) then
      turtle.turnRight()
      turtle.dig()
      turtle.forward()
      turtle.turnRight()
      direction = 2
    else
      turtle.turnLeft()
      turtle.dig()
      turtle.forward()
      turtle.turnLeft()
      direction = 1
    end

    manageInventory()

  end
end

boot()