shell.run("clear")
local enderchest = false
local torch = turtle.getItemCount(1)
local chests = turtle.getItemCount(2)
local dist = 0
local retdist = 0
local fuel = turtle.getFuelLevel()
local t = 0

function start()
    io.write "How deep do you want each branch? (Length) (1/99): "
    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()
    io.write "How many branches do you want? (Width) (1/99): "
    w = io.read()
  if not tonumber(w) then
    print ""
        print "Please enter a valid number"
        print ""
    start_1()
  else
    width = w+1
    start_2()
  end
  if tonumber(w) < 1 then
        print ""
        print "Number must be positive"
        print ""
        start_1()
    end
end

function start_2()
  io.write "Enderchest? (y/n): "
    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()
  print ("")
  print ("I will dig ".. w .. ", " .. ll .. " long tunnel(s)")
  if enderchest == true then
    print("Enderchest: Yes")
  else
    print("Enderchest: No")
  end
    io.write "Are you sure you want to procede? (y/n): "
    c = io.read()
  if c == "y" then
   --do stuff
    print "Off I go"
  elseif c == "n" then
    print "Be seeing you!"
  else
    print ""
    print "Please enter y or n"
    print ""
    start_3()
  end
end

function reFuel()
    turtle.select(3)
    turtle.refuel(1)
    local fuel = turtle.getFuelLevel()
end

function forward()
  if turtle.getFuelLevel() < 1 then
    reFuel()
  end
  if turtle.detect() then turtle.dig() end
  turtle.forward()
  dump()
  turtle.digUp()
  dump()
  dist = dist + 1
  print("dist:" .. dist)
  print("length:" .. length)
end

function dump()
  if turtle.getItemCount(16)>0 then
    turtle.digDown()
    turtle.select(2)
    turtle.placeDown()
    for slot = 4,15,1 do
      turtle.select(slot)
      turtle.dropDown()
    end
    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
end

function run()
  --[[print("torch:" .. torch)
  print("chests:" .. chests)
  print("fuel:" .. fuel)
  print("retdist:" .. retdist)]]--
  while (torch > 0) and (chests > 0) and (fuel > retdist) and (dist < tonumber(length)) do
    t = t + 1
    if t == 12 then
      light()
      t = 0
    end
    forward()
    --light()
    retdist = dist + 14
    local fuel = turtle.getFuelLevel()
  end
  --home()
end

start()
if fuel == 0 then
  print("Better refuel")
  reFuel()
end
--run()