local robot = require("robot")

local function mine_single()
  robot.swing()

  local result, error = robot.forward()
  if not result then
    print("Cannot mine: " .. error)
    return false
  end

  robot.swingUp()

  return true
end

local function mine_n(count)
  local mined = 0
  for _ = 1, count do
    if mine_single() then
      mined = mined + 1
    else
      break
    end
  end
  return mined
end

local function mine_row(length)
  local mined = mine_n(length)

  robot.turnAround()

  for _ = 1, mined do
    while not robot.forward() do end
  end
end

local function mine(mine_rows, mine_row_length)

  for i = 1, mine_rows do
    print("Mining row " .. i .. " of " .. mine_rows)
    mine_row(mine_row_length)
    robot.turnLeft()
    if mine_n(3) ~= 3 then
      print("Unable to continue mining rows")
      return
    end
    robot.turnLeft()
  end

end


local rows, row_length = ...

print("Will mine " .. rows .. "x" .. row_length .. " rows")

mine(rows, row_length)