-- mining_menu.lua
local settings = {
  lang = "de",
  length = 10,
  width = 1,
  depth = 10,
  autoRefuel = true,
  autoDump = true
}
local function loadSettings()
  if fs.exists("mining_config") then
    local f = fs.open("mining_config", "r")
    settings = textutils.unserialize(f.readAll())
    f.close()
  end
end

local function saveSettings()
  local f = fs.open("mining_config", "w")
  f.write(textutils.serialize(settings))
  f.close()
end

local texts = {
  ["de"] = {
    start = "Start",
    settings = "Einstellungen",
    language = "Sprache",
    length = "Länge",
    width = "Breite",
    depth = "Tiefe",
    refuel = "Autom. Auftanken",
    dump = "In Truhe ablegen",
    back = "Zurück",
    run = "Mining gestartet..."},
  ["en"] = {
    start = "Start",
    settings = "Settings",
    language = "Language",
    length = "Length",
	width = "Width",
    depth = "Depth",
    refuel = "Auto Refuel",
    dump = "Dump to Chest",
    back = "Back",
    run = "Mining started..."
  }
}
local function readNumber(prompt)
  print(prompt)
  local input = read()
  return tonumber(input) or 1
end
local function toggleOption(key)
  settings[key] = not settings[key]
end
local function selectLanguage()
  print("1 - Deutsch")
  print("2 - English")
  local choice = read()
  if choice == "1" then settings.lang = "de"
  elseif choice == "2" then settings.lang = "en"
  end
end
local function showSettings()
  local t = texts[settings.lang]
  while true do
    term.clear()
    print("=== " .. t.settings .. " ===")
    print("1 - " .. t.length .. ": " .. settings.length)
    print("2 - " .. t.width .. ": " .. settings.width)
    print("3 - " .. t.depth .. ": " .. settings.depth)
    print("4 - " .. t.refuel .. ": " .. tostring(settings.autoRefuel))
    print("5 - " .. t.dump .. ": " .. tostring(settings.autoDump))
    print("6 - " .. t.back)
    local choice = read()
    if choice == "1" then settings.length = readNumber(t.length)
    elseif choice == "2" then settings.width = readNumber(t.width)
    elseif choice == "3" then settings.depth = readNumber(t.depth)
    elseif choice == "4" then toggleOption("autoRefuel")
	elseif choice == "5" then toggleOption("autoDump")
    elseif choice == "6" then return
    end
    saveSettings()
  end
end
local function refuelIfNeeded()
  if turtle.getFuelLevel() < 100 and settings.autoRefuel then
    for i = 1, 16 do
      turtle.select(i)
      if turtle.refuel(0) then
        turtle.refuel()
        break
      end
    end
  end
end
local function dumpInventory()
  if not settings.autoDump then return end
  for i = 1, 16 do
    turtle.select(i)
    turtle.drop()
  end
end
local function mine()
  local t = texts[settings.lang]
  term.clear()
  print(t.run)
  for w = 1, settings.width do
    for l = 1, settings.length do
      refuelIfNeeded()
      while turtle.detect() do turtle.dig() end
      turtle.forward()
    end
    if w < settings.width then
      if w % 2 == 1 then
        turtle.turnRight()
        while turtle.detect() do turtle.dig() end
        turtle.forward()
        turtle.turnRight()
      else
        turtle.turnLeft()
        while turtle.detect() do turtle.dig() end
        turtle.forward()
        turtle.turnLeft()
      end
    end
  end
  for d = 1, settings.depth - 1 do
    turtle.digDown()
    turtle.down()
    mine()
  end
  for _ = 1, settings.depth - 1 do
    turtle.up()
  end
  dumpInventory()
end
local function mainMenu()
  loadSettings()
  while true do
    local t = texts[settings.lang]
    term.clear()
    print("=== Mining Turtle ===")
    print("1 - " .. t.start)
    print("2 - " .. t.settings)
    print("3 - " .. t.language)
    local choice = read()
    if choice == "1" then mine()
    elseif choice == "2" then showSettings()
    elseif choice == "3" then selectLanguage()
    end
  end
end