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-- pastebin ID: LXSNkj5r
-- URL: https://pastebin.com/LXSNkj5r
 
local logFilePath = "mine.log"
 
local noChest = false
local startChest = true  -- Make startChest the default behavior
 
-- Precious blocks list - blocks to detect and avoid mining unless blocking path
local preciousBlocks = {
  "diamond",
  "lapis",
  "debris"
}
 
-- Mainframe communication
local MAINFRAME_ID = nil
local modemSide = nil
local detectionRunning = false
 
 
-- Direction vectors: north (-Z), east (+X), south (+Z), west (-X)
local dirs = {
  [0] = {x = 0, z = -1}, -- North
  [1] = {x = 1, z = 0},  -- East
  [2] = {x = 0, z = 1},  -- South
  [3] = {x = -1, z = 0}, -- West
}
 
-- Initial state - use relative coordinates for movement
local pos = {x = 0, y = 0, z = 0}
local heading = 0  -- 0=north, 1=east, 2=south, 3=west
 
 
-- Function to find and open modem
function openModem()
  if modemSide then return true end
 
  local sides = {"left", "right", "top", "bottom", "front", "back"}
  for _, side in ipairs(sides) do
    if peripheral.getType(side) == "modem" then
      rednet.open(side)
      modemSide = side
      log("Modem opened on " .. side)
      return true
    end
  end
  log("No modem found for mainframe communication")
  return false
end
 
-- Function to discover mainframe ID via broadcast
function discoverMainframe()
  if MAINFRAME_ID then return MAINFRAME_ID end
 
  if not openModem() then
    log("Cannot discover mainframe - no modem available")
    return nil
  end
 
  log("Broadcasting to discover mainframe...")
  rednet.broadcast("discover_mainframe")
 
  -- Wait for responses for up to 3 seconds
  local timeout = os.clock() + 3
  while os.clock() < timeout do
    local senderId, message = rednet.receive(0.1)
    if senderId and message == "mainframe_here" then
      MAINFRAME_ID = senderId
      log("Discovered mainframe at ID: " .. MAINFRAME_ID)
      return MAINFRAME_ID
    end
  end
 
  log("No mainframe found via broadcast")
  return nil
end
 
-- Function to report precious block to mainframe
function reportPreciousBlock(blockName, x, y, z)
  local mainframeId = discoverMainframe()
  if mainframeId and openModem() then
    local message = {
      type = "precious",
      blockName = blockName,
      x = x,
      y = y,
      z = z
    }
    rednet.send(mainframeId, message)
    log("Reported to mainframe " .. mainframeId .. ": " .. blockName .. " at (" .. x .. ", " .. y .. ", " .. z .. ")")
  else
    log("Cannot report precious block - mainframe not available")
  end
end
 
-- Function to report current GPS location to mainframe
function reportLocationToMainframe()
  local mainframeId = discoverMainframe()
  if mainframeId and openModem() then
    local gpsX, gpsY, gpsZ = gps.locate()
    if gpsX and gpsY and gpsZ then
      local message = {
        type = "location",
        x = gpsX,
        y = gpsY,
        z = gpsZ
      }
      rednet.send(mainframeId, message)
      log("Reported location to mainframe " .. mainframeId .. ": (" .. gpsX .. ", " .. gpsY .. ", " .. gpsZ .. ")")
    else
      -- Fallback to relative coordinates if GPS not available
      local absPos = getAbsolutePosition()
      local message = {
        type = "location",
        x = absPos.x,
        y = absPos.y,
        z = absPos.z
      }
      rednet.send(mainframeId, message)
      log("Reported relative location to mainframe " .. mainframeId .. ": (" .. absPos.x .. ", " .. absPos.y .. ", " .. absPos.z .. ")")
    end
  else
    log("Cannot report location - mainframe not available")
  end
end
 
-- Function to scrub precious locations from mainframe for this turtle
function scrubPreciousLocations()
  local mainframeId = discoverMainframe()
  if mainframeId and openModem() then
    local myId = os.getComputerID()
    local message = "scrub_precious " .. myId
    rednet.send(mainframeId, message)
    log("Requested mainframe " .. mainframeId .. " to scrub precious locations for turtle " .. myId)
 
    -- Wait for confirmation
    local timeout = os.clock() + 2
    while os.clock() < timeout do
      local senderId, response = rednet.receive(0.1)
      if senderId == mainframeId and type(response) == "string" and string.find(response, "Scrubbed") then
        log("Mainframe confirmed: " .. response)
        return true
      end
    end
    log("No confirmation received from mainframe for scrub request")
  else
    log("Cannot scrub precious locations - mainframe not available")
  end
  return false
end
 
-- Continuous precious block detection that runs in parallel
function continuousDetection()
  detectionRunning = true
  log("Starting continuous precious block detection...")
 
  while detectionRunning do
    -- Get current GPS coordinates directly
    local gpsX, gpsY, gpsZ = gps.locate()
    if not gpsX then
      -- Fallback to relative coordinates if GPS not available
      gpsX, gpsY, gpsZ = pos.x, pos.y, pos.z
    end
 
    -- Check only forward, up, and down directions (no side inspection to avoid interfering with mining)
    local directions = {
      {name = "forward", detect = turtle.inspect},
      {name = "up", detect = turtle.inspectUp},
      {name = "down", detect = turtle.inspectDown}
    }
 
    -- Check forward, up, down only
    for _, dir in ipairs(directions) do
      local success, data = dir.detect()
      if success and data and data.name and isPreciousBlock(data.name) then
        reportPreciousBlock(data.name, gpsX, gpsY, gpsZ)
      end
    end
 
    -- Sleep briefly to avoid overwhelming the system
    sleep(0.5)
  end
 
  log("Continuous precious block detection stopped")
end
 
-- Function to stop continuous detection
function stopDetection()
  detectionRunning = false
end
 
-- Function to log messages to a file
function log(message)
  local file = fs.open(logFilePath, "a")
  print(message)
  file.writeLine(message)
  file.close()
end
 
-- Function to clean block name by removing everything before ':'
function cleanBlockName(blockName)
  if not blockName then return "unknown" end
  local colonPos = string.find(blockName, ":")
  if colonPos then
    return string.sub(blockName, colonPos + 1)
  else
    return blockName
  end
end
 
-- Function to check if a block name contains precious materials
function isPreciousBlock(blockName)
  if not blockName then return false end
 
  for _, precious in ipairs(preciousBlocks) do
    if string.find(string.lower(blockName), precious) then
      return true
    end
  end
  return false
end
 
-- Function to detect and log precious blocks in all directions
function detectPreciousBlocks()
  local directions = {
    {name = "forward", detect = turtle.inspect, pos = "front"},
    {name = "up", detect = turtle.inspectUp, pos = "above"},
    {name = "down", detect = turtle.inspectDown, pos = "below"}
  }
 
  for _, dir in ipairs(directions) do
    local success, data = dir.detect()
    if success and data and data.name then
      if isPreciousBlock(data.name) then
        log("PRECIOUS BLOCK DETECTED " .. dir.pos .. ": " .. data.name .. " at relative position (" .. pos.x .. ", " .. pos.y .. ", " .. pos.z .. ")")
      end
    end
  end
end
 
-- Function to get GPS coordinates for absolute positioning
function getGPSPosition()
  local x, y, z = gps.locate()
  if x and y and z then
    log("GPS coordinates obtained: (" .. x .. ", " .. y .. ", " .. z .. ")")
    return {x = x, y = y, z = z}
  else
    log("WARNING: GPS not available, absolute coordinates will not be available")
    return nil
  end
end
 
-- Get starting GPS position for absolute coordinate conversion
local startGPS = getGPSPosition()
 
-- Function to get current absolute coordinates
function getAbsolutePosition()
  if startGPS then
    return {
      x = startGPS.x + pos.x,
      y = startGPS.y + pos.y,
      z = startGPS.z + pos.z
    }
  else
    -- If GPS not available, return relative coordinates
    return {x = pos.x, y = pos.y, z = pos.z}
  end
end
 
 
-- Helpers
function turnLeft()
  turtle.turnLeft()
  heading = (heading - 1 + 4) % 4 -- Ensure positive modulo result
end
 
function turnRight()
  turtle.turnRight()
  heading = (heading + 1) % 4
end
 
function moveForward()
  while not turtle.forward() do
    turtle.attack()
    digForward()
    sleep(0.5)
  end
  pos.x = pos.x + dirs[heading].x
  pos.z = pos.z + dirs[heading].z
  reportLocationToMainframe()
end
 
function moveBackward()
  turtle.back()
  pos.x = pos.x - dirs[heading].x
  pos.z = pos.z - dirs[heading].z
  reportLocationToMainframe()
end
 
function moveUp()
  while not turtle.up() do
    turtle.attackUp()
    digUp()
    sleep(0.5)
  end
  pos.y = pos.y + 1
  reportLocationToMainframe()
end
 
function moveDown()
  while not turtle.down() do
    turtle.attackDown()
    digDown()
    sleep(0.5)
  end
  pos.y = pos.y - 1
  reportLocationToMainframe()
end
 
function digForward()
  while turtle.detect() do
    turtle.dig()
    sleep(0.3)
  end
end
 
function digUp()
  while turtle.detectUp() do
    turtle.digUp()
    sleep(0.3)
  end
end
 
function digDown()
  while turtle.detectDown() do
    turtle.digDown()
    sleep(0.3)
  end
end
 
function isInventoryFull()
  for i = 1, 16 do
    if turtle.getItemCount(i) == 0 then return false end
  end
  log("InventoryFull. startChest: " .. tostring(startChest) .. ", noChest: " .. tostring(noChest))
  return true
end
 
function refuelIfNeeded()
  for i = 1, 16 do
    turtle.select(i)
    local itemDetail = turtle.getItemDetail()
    if itemDetail and string.find(itemDetail.name, "coal") then
      while turtle.getItemCount(i) > 0 do
        turtle.refuel(1)
      end
      log("Refueled with " .. itemDetail.name .. " from slot " .. i)
    end
  end
  turtle.select(1)
end
 
function dumpJunk()
  local junkItems = {
    "cobblestone", "diorite", "gravel", "dirt", "tuff", "blackstone", "pebble", "polished blackstone wall",
    "nether brick wall", "nether brick fence", "red nether brick", "nether brick staires", "cracked nether bricks",
    "nether bricks",
    "granite", "deepslate", "netherrack", "rhyolite", "schist", "pebble", "asphalt", "andesite"
  }
  for i = 1, 16 do
    turtle.select(i)
    local itemDetail = turtle.getItemDetail()
    if itemDetail then
      for _, junk in ipairs(junkItems) do
        if string.find(itemDetail.name, junk) then
          turtle.drop()
          log("Dropped junk item: " .. itemDetail.name .. " from slot " .. i)
          break
        end
      end
    end
  end
  turtle.select(1)
end
 
-- Safe digging functions for digTriplet - avoid precious blocks that aren't blocking movement
function digForwardSafe()
  while turtle.detect() do
    local success, data = turtle.inspect()
    if success and data and data.name and isPreciousBlock(data.name) then
      local cleanedName = cleanBlockName(data.name)
      log("AVOIDING precious block in front (not blocking path): " .. cleanedName .. " at position (" .. pos.x .. ", " .. pos.y .. ", " .. pos.z .. ")")
      break -- Don't dig precious blocks when just clearing area
    end
    turtle.dig()
    sleep(0.3)
  end
end
 
function digUpSafe()
  while turtle.detectUp() do
    local success, data = turtle.inspectUp()
    if success and data and data.name and isPreciousBlock(data.name) then
      local cleanedName = cleanBlockName(data.name)
      log("AVOIDING precious block above (not blocking path): " .. cleanedName .. " at position (" .. pos.x .. ", " .. pos.y + 1 .. ", " .. pos.z .. ")")
      break -- Don't dig precious blocks when just clearing area
    end
    turtle.digUp()
    sleep(0.3)
  end
end
 
function digDownSafe()
  while turtle.detectDown() do
    local success, data = turtle.inspectDown()
    if success and data and data.name and isPreciousBlock(data.name) then
      local cleanedName = cleanBlockName(data.name)
      log("AVOIDING precious block below (not blocking path): " .. cleanedName .. " at position (" .. pos.x .. ", " .. pos.y - 1 .. ", " .. pos.z .. ")")
      break -- Don't dig precious blocks when just clearing area
    end
    turtle.digDown()
    sleep(0.3)
  end
end
 
function digTriplet()
  -- Detect precious blocks in all directions before mining
  detectPreciousBlocks()
 
  digForwardSafe()  -- Use safe version - not actually moving forward here
  moveForward()
 
  -- Detect precious blocks again after moving
  detectPreciousBlocks()
 
  -- Use safe digging for up/down since turtle isn't moving in those directions
  digUpSafe()
  digDownSafe()
end
 
function dig()
  digTriplet()
  if isInventoryFull() then
    log("Checking where to drop the stuff. startChest: " .. tostring(startChest) .. ", noChest: " .. tostring(noChest))
 
    if noChest then
      for i = 1, 16 do
        turtle.select(i)
        turtle.drop()
      end
    elseif startChest then
      local currentPos = {x = pos.x, y = pos.y, z = pos.z, d = heading}
      goTo(0, 0, 0, 2)
      for i = 1, 16 do
        turtle.select(i)
        turtle.drop()
      end
      goTo(currentPos.x, currentPos.y, currentPos.z, currentPos.d) -- Return to the original position
    else
      placeChestAndUnload()
    end
  end
  -- log("Dug block at position: (" .. pos.x .. ", " .. pos.y .. ", " .. pos.z .. ")")
end
 
function placeChestAndUnload()
  turtle.select(1) -- Select slot 1, assuming it's for the chest
 
  -- Loop until a chest is found in slot 1
  local itemInSlot1 = turtle.getItemDetail(1)
  while not itemInSlot1 or not string.find(itemInSlot1.name, "chest") do
    log("Waiting for chest in slot 1. Current item: " .. (itemInSlot1 and itemInSlot1.name or "nil"))
    print("Please place a chest in slot 1 to continue.")
    sleep(2) -- Wait for 2 seconds before re-checking
    itemInSlot1 = turtle.getItemDetail(1)
  end
 
  -- Now that a chest is confirmed in slot 1, proceed with placing it
  while not turtle.placeDown() do
    log("Waiting to place chest. Please ensure the space below is clear.")
    print("Waiting to place chest. Please ensure the space below is clear.")
    sleep(2) -- Wait for 2 seconds before retrying
  end
  log("Placed chest below at position: (" .. pos.x .. ", " .. pos.y .. ", " .. pos.z .. ")")
  for i = 2, 16 do -- Start from slot 2, assuming slot 1 is for the chest
    turtle.select(i)
    turtle.dropDown()
  end
  turtle.select(1) -- Re-select slot 1
end
 
function digTunnel(x)
  for i = 1, x do
    dig()
  end
  refuelIfNeeded()
  dumpJunk()
end
 
function goTo(x, y, z, d)
  while pos.y < y do moveUp() end
  while pos.y > y do moveDown() end
 
  local dx = x - pos.x
  if dx ~= 0 then
    -- Determine target heading based on dx
    local targetHeadingX = (dx > 0) and 1 or 3 -- East or West
    faceDirection(targetHeadingX)
    for i = 1, math.abs(dx) do digTriplet() end
  end
 
  local dz = z - pos.z
  if dz ~= 0 then
    -- Determine target heading based on dz
    local targetHeadingZ = (dz > 0) and 2 or 0 -- South or North
    faceDirection(targetHeadingZ)
    for i = 1, math.abs(dz) do digTriplet() end
  end
 
  faceDirection(d)
end
 
function faceDirection(dir)
  while heading ~= dir do
    turnRight()
  end
end
 
local args = { ... }
 
function digLayer(width, length, spacing)
  tunnelLength =  width - 1
  numTunnels = math.floor((length + spacing) / (1 + spacing))
 
 
  log("Starting layer mining with tunnel length: " .. tunnelLength .. ", number of tunnels: " .. numTunnels .. ", spacing: " .. spacing)
 
  for _ = 1, math.floor(numTunnels / 2) do
    -- Move to start of first tunnel (connecting segment)
    digTunnel(1 + spacing)
 
    -- Turn into first main tunnel
    turnLeft()
    digTunnel(tunnelLength)
 
    -- Turn to move to next connecting segment
    turnRight()
    digTunnel(1 + spacing)
 
    -- Turn into second main tunnel
    turnRight()
    digTunnel(tunnelLength)
 
    -- Turn back to original orientation for next pair of tunnels
    turnLeft()
  end
 
  if numTunnels % 2 == 1 then
    log("Warning: numTunnels is odd. The last tunnel might not follow the full zig-zag pattern.")
  end
 
  if noChest then
    log("No chest mode: Dropping items on the ground.")
    for i = 1, 16 do
      turtle.select(i)
      turtle.drop()
    end
  elseif startChest then
    log("Start chest mode: Returning to start to unload.")
    goTo(0, 0, 0, 2)
    for i = 1, 16 do
      turtle.select(i)
      turtle.drop()
    end
  end
end
 
-- Mining function that runs the actual mining operations
function runMining()
  local width = tonumber(args[1])
  local length = tonumber(args[2])
  local tspacing = tonumber(args[3])
  local layers = tonumber(args[4])
  local lspacing = tonumber(args[5])
 
  for i = 1, layers do
    log("Starting layer ".. i)
    goTo(0, - (i - 1) * (3 + lspacing), 0, 0)
    digLayer(width, length, tspacing)
  end
 
  if noChest then
    log("No chest mode: Dropping items on the ground.")
    for i = 1, 16 do
      turtle.select(i)
      turtle.drop()
    end
  elseif startChest then
    log("Start chest mode: Returning to start to unload.")
    goTo(0, 0, 0, 2)
    for i = 1, 16 do
      turtle.select(i)
      turtle.drop()
    end
  end
 
  goTo(0, 0, 0, 0)
 
  -- Stop continuous detection when mining is complete
  stopDetection()
  log("Mining complete.")
end
 
function main()
  if #args < 5 then
    print("Usage: mine <width> <length> <tunnelSpacing> <numLayers> <layerSpacing> [--nochest | --nostartchest]")
    return
  end
 
  local width = tonumber(args[1])
  local length = tonumber(args[2])
  local tspacing = tonumber(args[3])
  local layers = tonumber(args[4])
  local lspacing = tonumber(args[5])
 
  -- Parse optional flags
  for i = 6, #args do
    if args[i] == "--nochest" then
      log("Detected --nochest")
      noChest = true
      startChest = false  -- Override default when --nochest is specified
    elseif args[i] == "--nostartchest" then
      log("Detected --nostartchest")
      startChest = false
    end
  end
 
  log("startChest: " .. tostring(startChest) .. ", noChest: " .. tostring(noChest))
 
  if not width or not length or not tspacing  or not layers  or not lspacing then
    print("Invalid input.")
    return
  end
 
  -- Scrub previous precious locations when starting new mining operation
  log("Starting new mining operation - scrubbing previous precious locations...")
  scrubPreciousLocations()
 
  -- Report initial location to mainframe
  reportLocationToMainframe()
 
  -- Run mining and continuous detection in parallel
  parallel.waitForAll(runMining, continuousDetection)
end
 
main()