tunnel

local depth
local slot=1
turtle.select(slot)

term.clear()
term.setCursorPos(1,1)
print("How many blocks deep would you like the tunnel to be?")
depth = read()

print(" ")
print("Fuel Remaining:")
startFuel = turtle.getFuelLevel()
print(startFuel)

print(" ")
print("Would you like to add more fuel?")
print("y/n")
local answer
answer = read()
if answer == "y" then
  print("Press any key to refuel")
  os.pullEvent("key")
  print("Scanning...")
  for i=0, 14, 1 do
    turtle.refuel()
    slot=slot+1
    turtle.select(slot)
  end
  turtle.refuel()
  turtle.select(1)
  startFuel = turtle.getFuelLevel()
  print("Current fuel level:")
  print(startFuel)
end

print(" ")
print("Would you like to enable smartStart?")
print("y/n")
local answerSS = read()
local smartStart = false
local smartDistance = 0
if answerSS == "y" then
  smartStart = true
else
  smartStart = false
end

print(" ")
print("Would you like to enable boreForward?")
print("y/n")
local answerBF = read()
local boreForwardDistance = 0
local boreForward = false
local bFCounter = 0
if answerBF == "y" then
  print(" ")
  print("How many blocks forward would you like to bore?")
  boreForwardDistance = read()
  boreForward = true
  bFCounter = boreForwardDistance
else
  boreForward = false
end

print(" ")
print("Would you like to enable boreDown?")
print("y/n")
local answerBD = read()
local boreDownDistance = 0
local boreDown = false
local bDCounter = 0
if answerBD == "y" then
  boreDown = true
  print(" ")
  print("How many blocks down would you like to bore?")
  boreDownDistance = read()
  bDCounter = boreDownDistance
else
  boreDown = false
end

print(" ")
term.setTextColour(colours.red)
print("!WARNING! NO INVENTORY CHECKER! PROGRAM WILL NOT STOP IF INVENTORY IS FULL!")

term.setTextColour(colours.white)
print(" ")
print("Estimated Fuel Cost:")
estFuel = (depth*22)+(depth+2)+(boreDownDistance*2)+(boreForwardDistance*2)
print(estFuel)

if startFuel+120 > estFuel then
  print(" ")
  print("Press any key to commence tunneling operation.")
  os.pullEvent("key")
else
  print(" ")
  term.setTextColour(colours.red)
  print("Insufficienf fuel! Fuel must be estimated fuel + 120!")
  return
end

function digCheck()
  if turtle.detect() == true then
    turtle.dig()
    sleep(.5)
    digCheck()
  else
  end
end

function digUpCheck()
  while turtle.detectUp() == true do
    turtle.digUp()
    sleep(.5)
  end
end

if boreDown == true then
  while bDCounter ~= 0 do
    turtle.digDown()
    turtle.down()
    bDCounter = bDCounter - 1
  end
end

if smartStart == true then
  while turtle.detect() == false do
    turtle.forward()
    smartDistance = smartDistance + 1
  end
end

if boreForward == true then
  while bFCounter ~= 0 do
    digCheck()
    turtle.forward()
    bFCounter = bFCounter - 1
  end
end


for i=1, depth, 1 do
  digCheck()
  turtle.forward()
  digUpCheck()
  turtle.up()
  digUpCheck()
  turtle.up()
  digUpCheck()
  turtle.up()
  digUpCheck()
  turtle.up()
  turtle.turnLeft()
  digCheck()
  turtle.forward()
  digCheck()
  turtle.digDown()
  turtle.down()
  digCheck()
  turtle.digDown()
  turtle.down()
  digCheck()
  turtle.digDown()
  turtle.down()
  digCheck()
  turtle.digDown()
  turtle.down()
  digCheck()
  turtle.turnLeft()
  turtle.turnLeft()
  digCheck()
  turtle.forward()
  digCheck()
  turtle.forward()
  digCheck()
  digUpCheck()
  turtle.up()
  digCheck()
  digUpCheck()
  turtle.up()
  digCheck()
  digUpCheck()
  turtle.up()
  digCheck()
  digUpCheck()
  turtle.up()
  digCheck()
  turtle.down()
  turtle.down()
  turtle.down()
  turtle.down()
  digCheck()
  turtle.back()
  turtle.turnLeft()
end

for i=1, depth + smartDistance + boreForwardDistance, 1 do
  turtle.back()
end

for i=1, boreDownDistance, 1 do
  turtle.up()
end