/miner/branchmine

os.unloadAPI("/miner/movement")
os.loadAPI("/miner/movement")

local length
local torchPlacementInterval=7
local maxRetryCount=20

function returnAfterRetryFailed()
  movement.move(0, 0, 0)
  movement.face("NORTH")

  write("\Move retry count reached!\n")
  print("Did you reach bedrock?")
  error()
end

function mineBlockAndMoveForward()
  local retryCount=0
  while movement.forward()==false do
    if retryCount>=maxRetryCount then
      returnAfterRetryFailed()
    end

    if turtle.dig()==false then
      turtle.attack()
    end

    retryCount=retryCount+1
  end
end


function placeTorch()
  turtle.select(1)

  if turtle.placeDown()==false then
    movement.down()
    turtle.select(2)
    turtle.placeDown()
    movement.up()

    turtle.select(1)
    turtle.placeDown()
  end
end

function digDown()
  if turtle.detectDown() then
    turtle.digDown()
    sleep(0.200)
  end
end

function branchmine(length)
  movement.up()
  for i=1,length do
    mineBlockAndMoveForward()
    digDown()

    if i==1 or (i%torchPlacementInterval)==0 then
      placeTorch()
    end
  end

  movement.move(0, 0, 1)
  movement.face("NORTH")
  movement.move(0, 0, 0)
end

local args={...}

if #args >= 1 then
  length=tonumber(args[1])
  branchmine(length)
else
  print("branchmine [length]")
end