shell.run("clear")
local torch = turtle.getItemCount(1)
local chests = turtle.getItemCount(2)
local fuel = turtle.getFuelLevel()
local dist = 0
local retdist = 0
local t = 0
local name = os.getComputerLabel()
local branches = 1

function start()
  print ""
    print "Welcome to the autominer3000"
    print ""
  print "Please have torches in slot 1, chests in 2 and fuel in 3 upon startup."
  print ""
  print "Failure to do so may have unforeseen health risks."
  print ""
  text = "[" .. name .. "~] How deep do you want each branch? (Length) (1/99): "
    io.write(text)
    ll = io.read()
  if not tonumber(ll) then
    print ""
        print "Please enter a valid number"
        print ""
    start()
  else
    length = ll+1
    start_1()
  end
  if tonumber(length) < 1 then
        print ""
        print "Number must be positive"
        print ""
        start()
    end
end

function start_1()
  text = "[" .. name .. "~] How many branches do you want? (Width) (1/99): "
    io.write(text)
    w = io.read()
  if not tonumber(w) then
    print ""
        print "Please enter a valid number"
        print ""
    start_1()
  else
    width = w
    start_2()
  end
  if tonumber(w) < 1 then
        print ""
        print "Number must be positive"
        print ""
        start_1()
    end
end

function start_2()
  text = "[" .. name .. "~] Enderchest? (y/n): "
    io.write(text)
    e = io.read()
  if e == "y" then
    enderchest = true
    start_3()
  elseif e == "n" then
    enderchest = false
    start_3()
  else
    print ""
    print "Please enter y or n"
    print ""
    start_2()
  end
end

function start_3()
  text = "[" .. name .. "~] Direction (left/right): "
    io.write(text)
    d = io.read()
  if d == "left" then
    direction = d
    start_4()
  elseif d == "right" then
    direction = d
    start_4()
  else
    print ""
    print "Please enter y or n"
    print ""
    start_3()
  end
end

function start_4()
  print ("")
  print ("I will dig ".. w .. ", " .. ll .. " long tunnel(s)")
  print ("")
  if enderchest == true then
    print("Enderchest: Yes")
  else
    print("Enderchest: No")
  end
  print ("")
  print ("Making branches to the " .. direction)
  print ("")
  text = "[" .. name .. "~] Are you sure you want to procede? (y/n): "
    io.write(text)
    c = io.read()
  if c == "y" then
    --if check_items() then run() end
    run()
  elseif c == "n" then
    print "Be seeing you!"
  else
    print ""
    print "Please enter y or n"
    print ""
    start_4()
  end
end

function check_items()

end

function reFuel()
    for i = 3, 16 do
      turtle.select(i)
      turtle.refuel(1)
      if turtle.getFuelLevel() > 0 then
        turtle.select(1)
        local fuel = turtle.getFuelLevel()
        return
      end
    end
    addFuel()
end

function addFuel()
    print ""
    print "Add fuel to continue..."
  print ""
    turtle.select(3)
    while turtle.getFuelLevel() == 0 do
        turtle.refuel(1)
        sleep(1)
    end
    print ""
    print "Yummy, thank you!"
    print ""
end

function forward()
  if turtle.getFuelLevel() < 1 then
    reFuel()
  end
  if turtle.detect() then
    turtle.dig()
    sleep(.6)
        while turtle.detectUp() == true do
            turtle.digUp()
            sleep(.6)
        end
  end
  if turtle.forward() then
   dist = dist + 1
  end
  dump()
  turtle.digUp()
  print("dist:" .. dist)
  print("length:" .. length)
  print("branches:" .. branches)
end

function turn()
  if lastDirection == "right" then direction = "left" end
  if lastDirection == "left" then direction = "right" end
  if direction == "left" then
    turtle.turnLeft()
    forward()
    turtle.turnRight()
    turtle.turnRight()
    turtle.select(1)
    turtle.place()
    turtle.turnRight()
    turtle.turnRight()
    forward()
    forward()
    forward()
    turtle.turnLeft()
    lastDirection = "left"
    dist = 0
    branches = branches+1
  elseif direction == "right" then
    turtle.turnRight()
    forward()
    turtle.turnLeft()
    turtle.turnLeft()
    turtle.select(1)
    turtle.place()
    turtle.turnLeft()
    turtle.turnLeft()
    forward()
    forward()
    forward()
    turtle.turnRight()
    lastDirection = "right"
    dist = 0
    branches = branches+1
  end
end

function dump()
  if turtle.getItemCount(16)>0 then
    turtle.digDown()
    turtle.select(2)
    turtle.placeDown()
    turtle.select(1)
    for slot = 4,16,1 do
      turtle.select(slot)
      turtle.dropDown()
    end
    turtle.select(1)
    if enderchest then
      turtle.select(2)
      turtle.digDown()
    else
      chests = chests - 1
    end
  end
end

function light()
  turtle.turnLeft()
  turtle.turnLeft()
  turtle.select(1)
  turtle.place()
  turtle.turnLeft()
  turtle.turnLeft()
  torch = torch - 1
  t = 0
end

function run()
  while dist < tonumber(length) and branches <= tonumber(width) do
    t = t + 1
    if t == 12 then
      light()
    end
    forward()
    retdist = dist + 14
    local fuel = turtle.getFuelLevel()
  end
  if branches == tonumber(width) and dist == tonumber(length) then os.shutdown() end
  turn()
  run()
end

start()