miner

-- miner.lua
local startY = 92
local targetY = 12
local depth = startY - targetY
local length = 60
local maxStrips = 20
local fuelThreshold = 500
local stripCount = 0
local lateralOffset = 0

turtle.refuel(64)

local trashList = {
  ["minecraft:stone"] = true,
  ["minecraft:gravel"] = true,
  ["minecraft:dirt"] = true,
  ["minecraft:cobblestone"] = true,
  ["minecraft:sand"] = true,
  ["minecraft:flint"] = true
}

function shiftLeft(n)
  print("Shifting left " .. n .. " blocks...")
  turtle.turnLeft()
  for i = 1, n do
    local tries = 0
    while not turtle.forward() do
      turtle.dig()
      turtle.attack()
      sleep(0.2)
      tries = tries + 1
      if tries >= 10 then
        print("Failed to shift left after 10 tries. Skipping.")
        break
      end
    end
  end
  turtle.turnRight()
end

function checkFuel()
  print("Checking fuel...")
  local level = turtle.getFuelLevel()
  if level < fuelThreshold then
    print("Fuel too low. Refueling")
    turtle.back()
    sleep(5)
    turtle.refuel()
    turtle.forward()
    turtle.select(1)
  end
end

function shouldTrash(name)
  return trashList[name] or false
end

function cleanInventory()
  print("Cleaning inventory...")
  for slot = 1, 16 do
    turtle.select(slot)
    local item = turtle.getItemDetail()
    if item and shouldTrash(item.name) then
      print("Dropping:", item.name)
      turtle.dropDown()
    end
  end
end

function goToStripStart()
  print("Returning to mine...")

  -- Move forward to strip depth
  for i = 1, 7 do
    turtle.forward()
  end

  -- Move left to current strip offset
  if lateralOffset > 0 then
    turtle.turnLeft()
    for i = 1, lateralOffset do
      turtle.forward()
    end
    turtle.turnRight()
  end
end

function mineDown(d)
  print("Mining down to depth " .. d)
  for i = 1, d do
    turtle.digDown()
    turtle.down()
  end
end

function mineForward()
  print("Mining forward...")
  for i = 1, length do
    turtle.dig()
    local tries = 0
    while not turtle.forward() do
      turtle.dig()
      turtle.attack()
      sleep(0.2)
      tries = tries + 1
      if tries >= 10 then break end
    end

    turtle.turnLeft()
    turtle.dig()
    turtle.turnRight()
    turtle.turnRight()
    turtle.dig()
    turtle.turnLeft()
  end

  turtle.turnLeft()
  turtle.turnLeft()
  for i = 1, length do
    local tries = 0
    while not turtle.forward() do
      turtle.dig()
      turtle.attack()
      sleep(0.2)
      tries = tries + 1
      if tries >= 10 then break end
    end
  end
  turtle.turnLeft()
  turtle.turnLeft()
end

function returnToBaseFrom(depth)
  print("Returning to base from depth " .. depth)
  for i = 1, depth do
    turtle.up()
  end
  for i = 1, 7 do
    turtle.back()
  end
  if lateralOffset > 0 then
    turtle.turnRight()
    for i = 1, lateralOffset do
      turtle.forward()
    end
    turtle.turnLeft()
  end
end

function dumpInventoryToHopper()
  print("Dumping inventory...")
  for slot = 1, 16 do
    turtle.select(slot)
    turtle.dropDown()
  end
  turtle.select(1)
end

-- Main loop
while stripCount < maxStrips do
  -- Layer 1
  goToStripStart()
  mineDown(depth)
  mineForward()
  cleanInventory()
  returnToBaseFrom(depth)
  dumpInventoryToHopper()
  sleep(3)
  checkFuel()

  -- Layer 2
  goToStripStart()
  mineDown(depth + 1)
  mineForward()
  cleanInventory()
  returnToBaseFrom(depth + 1)
  dumpInventoryToHopper()
  sleep(3)
  checkFuel()

  -- Layer 3
  goToStripStart()
  mineDown(depth + 2)
  mineForward()
  cleanInventory()
  returnToBaseFrom(depth + 2)
  dumpInventoryToHopper()
  sleep(3)
  checkFuel()

  -- Layer 4
  goToStripStart()
  mineDown(depth + 3)
  mineForward()
  cleanInventory()
  returnToBaseFrom(depth + 3)
  dumpInventoryToHopper()
  sleep(3)
  checkFuel()

  -- Layer 5
  goToStripStart()
  mineDown(depth + 4)
  mineForward()
  cleanInventory()
  returnToBaseFrom(depth + 4)
  dumpInventoryToHopper()
  sleep(3)
  checkFuel()

  lateralOffset = lateralOffset + 3
  stripCount = stripCount + 1
  print("Strip #" .. stripCount .. " complete")
end

print("Mining operation complete.")