function user_setup()
  auto_acc = true
  melee_hits = {}
  melee_hits_max = 11
  melee_acc_lower = 75
  melee_acc_upper = 90

  melee_acc_mode = 1
  melee_acc_modes = {'Melee', 'Acc', 'MaxAcc'}
  state.OffenseMode:options(table.slice(melee_acc_modes))
end

function track_melee_results(hits, misses)
  for i = 1, hits, 1 do
    table.insert(melee_hits, true)
  end

  for i = 1, misses, 1 do
    table.insert(melee_hits, false)
  end

  --slice off the first entries to limit to melee_hits_max
  if #melee_hits > melee_hits_max then
    melee_hits = table.slice(melee_hits, #melee_hits - melee_hits_max + 1)
  end
end

--Returns rolling % of accuracy, or nil if not enough data exists
function get_current_accuracy()
  if #melee_hits < melee_hits_max then return nil end

  local hits = table.count(melee_hits, true)
  return hits / melee_hits_max * 100
end

windower.register_event('action', function(action)
  if action.actor_id == player.id and action.category == 1 then -- 1 = melee attack
    local hits = 0
    local misses = 0
    for _, melee_result in pairs(action.targets[1].actions) do
      if melee_result.message == 1 or melee_result.message == 67 then -- 1 = regular attack, 67 = critical
        hits = hits + 1
      elseif melee_result.message == 15 then -- 15 = miss
        misses = misses + 1
      end
    end
    track_melee_results(hits, misses)
    local accuracy = get_current_accuracy()
    if accuracy then --accuracy = nil when there is not enough data
      if accuracy < melee_acc_lower then --our accuracy is too low
        if melee_acc_modes[melee_acc_mode + 1] then --can be upgraded
          melee_acc_mode = melee_acc_mode + 1
          local new_mode = melee_acc_modes[melee_acc_mode]
          print('Upgrading accuracy to', new_mode)
          state.OffenseMode:value(new_mode)
        else
          print('Unable to further upgrade accuracy')
        end
      elseif accuracy > melee_acc_upper then --acc is too high
        if melee_acc_mode > 1 then --can be downgraded
          melee_acc_mode = melee_acc_mode - 1
          local new_mode = melee_acc_modes[melee_acc_mode]
          print('Downgrading accuracy to', new_mode)
          state.OffenseMode:value(new_mode)
        else
          print('Unable to further downgrade accuracy')
        end
      end
    end
  end
end)