Branch

-- Branch Mining Turtle Program
-- Digs 2-high main tunnel with branches every 2 blocks
-- Ignores cobblestone, returns to refuel/unload at origin

-- === CONFIG ===
local MAIN_TUNNEL_LENGTH = 50      -- Length of the main tunnel
local BRANCH_LENGTH = 6            -- How far each side branch goes
local BRANCH_SPACING = 2           -- How often to branch
local TORCH_INTERVAL = 10
local TORCH_SLOT = 16
local FUEL_BUFFER = 100

-- === STATE ===
local step = 0
local x, y, z, dir = 0, 0, 0, 1 -- Assume facing East
local startX, startY, startZ, startDir = 0, 0, 0, 1

local cobbleNames = {
  ["minecraft:cobblestone"] = true,
  ["minecraft:stone"] = true,
  ["minecraft:gravel"] = true
}

-- === DIRECTION ===
local function update(dx, dy, dz) x, y, z = x + dx, y + dy, z + dz end
local function turnRight() turtle.turnRight(); dir = (dir + 1) % 4 end
local function turnLeft() turtle.turnLeft(); dir = (dir - 1) % 4 end
local function face(d) while dir ~= d do turnRight() end end

-- === MOVEMENT ===
local function tryForward()
  while not turtle.forward() do turtle.dig(); sleep(0.2) end
  if dir == 0 then update(0, 0, -1)
  elseif dir == 1 then update(1, 0, 0)
  elseif dir == 2 then update(0, 0, 1)
  elseif dir == 3 then update(-1, 0, 0) end
end

local function tryUp()
  while not turtle.up() do turtle.digUp(); sleep(0.2) end
  update(0, 1, 0)
end

local function tryDown()
  while not turtle.down() do turtle.digDown(); sleep(0.2) end
  update(0, -1, 0)
end

-- === POSITIONING ===
local function goTo(tx, ty, tz)
  while y > ty do tryUp() end
  while y < ty do tryDown() end
  if x < tx then face(1) while x < tx do tryForward() end end
  if x > tx then face(3) while x > tx do tryForward() end end
  if z < tz then face(2) while z < tz do tryForward() end end
  if z > tz then face(0) while z > tz do tryForward() end end
end

local function returnToOrigin()
  goTo(startX, startY, startZ)
  face(startDir)
end

-- === INVENTORY ===
local function isFull()
  for i = 1, 15 do
    if turtle.getItemCount(i) == 0 then return false end
  end
  return true
end

local function dropCobble()
  for i = 1, 15 do
    local detail = turtle.getItemDetail(i)
    if detail and cobbleNames[detail.name] then
      turtle.select(i)
      turtle.drop()
    end
  end
end

local function unloadInventory()
  print("📦 Unloading...")
  local ox, oy, oz, od = x, y, z, dir
  returnToOrigin()
  face((startDir + 2) % 4)
  for i = 1, 15 do turtle.select(i); turtle.drop() end
  face(startDir)
  goTo(ox, oy, oz); face(od)
end

-- === FUEL ===
local function refuelIfNeeded()
  if turtle.getFuelLevel() == "unlimited" or turtle.getFuelLevel() > FUEL_BUFFER then return end
  print("🔋 Refueling...")
  local ox, oy, oz, od = x, y, z, dir
  returnToOrigin()
  face((startDir - 1) % 4)
  for i = 1, 16 do
    turtle.select(i)
    if turtle.suck() and turtle.refuel() then break end
  end
  face(startDir)
  goTo(ox, oy, oz); face(od)
end

-- === DIGGING ===
local function digTunnelSection()
  turtle.dig()
  tryForward()
  turtle.digUp()
  tryUp()
  placeTorch()
  tryDown()
end

-- === TORCH ===
local function placeTorch()
  if step % TORCH_INTERVAL == 0 then
    turtle.select(TORCH_SLOT)
    turtle.placeUp()
    print("🕯️ Torch placed")
  end
end

local function digBranch(dirOffset)
  local originalDir = dir
  if dirOffset == "left" then turnLeft() else turnRight() end
  for i = 1, BRANCH_LENGTH do
    turtle.dig()
    tryForward()
    turtle.digUp()
    tryUp()
    tryDown()
  end
  -- Turn around and return
  turnRight(); turnRight()
  for i = 1, BRANCH_LENGTH do tryForward() end
  face(originalDir)
end

-- === MAIN ===
startX, startY, startZ, startDir = x, y, z, dir
print("🚜 Starting branch mining...")

for i = 1, MAIN_TUNNEL_LENGTH do
  digTunnelSection()
  step = step + 1

  if step % BRANCH_SPACING == 0 then
    digBranch("left")
    digBranch("right")
  end

  dropCobble()
  if isFull() then unloadInventory() end
  refuelIfNeeded()
end

returnToOrigin()
print("✅ Mining complete. Returned to start.")