ore_list = {
  [0] = "minecraft:gold_ore",
  [1] = "minecraft:deepslate_gold_ore",
  [2] = "minecraft:iron_ore",
  [3] = "minecraft:deepslate_iron_ore",
  [4] = "minecraft:coal_ore",
  [5] = "minecraft:deepslate_coal_ore",
  [6] = "minecraft:lapis_ore",
  [7] = "minecraft:deepslate_lapis_ore",
  [8] = "minecraft:diamond_ore",
  [9] = "minecraft:deepslate_diamond_ore",
  [10] = "minecraft:redstone_ore",
  [11] = "minecraft:deepslate_redstone_ore",
  [12] = "minecraft:emerald_ore",
  [13] = "minecraft:deepslate_emerald_ore",
  [14] = "minecraft:quartz_ore",
  [15] = "minecraft:deepslate_quartz_ore",
  [16] = "minecraft:copper_ore",
  [17] = "minecraft:deepslate_copper_ore",
  [18] = "minecraft:ancient_debris",
}

local function get_fuel_level()
  fuel_level = turtle.getFuelLevel()
  return fuel_level
end

local function store_items()
  --check inv for chest and place it
  chest_available = false
  for i=1, 16 do
    turtle.select(i)
    item_detail = turtle.getItemDetail()
    if item_detail ~= nil then
      if item_detail.name == "minecraft:chest" then
        turtle.placeDown()
        --TODO save in list, where chest is placed
        chest_available = true
        break
      elseif i == 16 then
        --TODO save in state that no chests are available
      end
    end
  end
  --drop items in chest
  if chest_available then
    for i=1, 16 do
      turtle.select(i)
      item_detail = turtle.getItemDetail()
      if item_detail ~= nil then
        if item_detail.name ~= "minecraft:torch" and item_detail.name ~= "minecraft:chest" then
          turtle.dropDown()
        end
      end
    end
  end
end

local function check_inventory()
  for i=1, 16 do
    turtle.select(i)
    item_count = turtle.getItemCount()
    if item_count == 0 then
      turtle.select(1)
      return
    end
  end

  store_items()
  turtle.select(1)
end

local function is_ore(block_data)
  for i=0, #ore_list do
    if block_data["name"] == ore_list[i] then
      return true
    end
  end
  return false
end


local function check_for_ore()
  for i=0, 3 do
    turtle.turnLeft()
    block_found, block_data = turtle.inspect()
    if is_ore(block_data) then
      turtle.dig()
      turtle.forward()
      check_for_ore()
      turtle.back()
    end
  end

  block_found, block_data = turtle.inspectUp()
  if is_ore(block_data) then
    turtle.digUp()
    turtle.up()
    check_for_ore()
    turtle.down()
  end

  block_found, block_data = turtle.inspectDown()
  if is_ore(block_data) then
    turtle.digDown()
    turtle.down()
    check_for_ore()
    turtle.up()
  end
end

local function digForward(length)
  for i=0, length do
    turtle.dig()
    turtle.forward()
  end
end

local function digUpward(length)
  for i=0, length do
    turtle.digUp()
    turtle.up()
  end
end

local function digDownward(length)
  for i=0, length do
    turtle.digDown()
    turtle.down()
  end
end


function chaosMine()
  direction1 = math.random(0,2)
  length = math.random(3,6)

  if direction == 0 then
    direction2 = math.random(0,3)
    for i=0, 3 do
      turtle.turnRight()
    end
    digForward(length)
  elseif direction == 1 then
    digUpward(length)
  elseif direction == 2 then
    digDownward(length)
  end
  chaosMine()
end