Counter Attack

function CommonFun.calcDamage_68501(srcUser, targetUser, params, damageParam, logger)
  local Str = srcUser:GetProperty("Str")
  local Dex = srcUser:GetProperty("Dex")
  local Luk = srcUser:GetProperty("Luk")
  local Atk = srcUser:GetProperty("Atk")
  local Vit = srcUser:GetProperty("Vit")
  local AtkPer = srcUser:GetProperty("AtkPer")
  local DamIncrease = srcUser:GetProperty("DamIncrease")
  local IgnoreDef = 0
  local IgnoreDef1 = srcUser:GetProperty("IgnoreDef")
  local IgnoreDef2 = srcUser:GetProperty("IgnoreEquipDef")
  if targetUser.boss or targetUser.mini then
    IgnoreDef = IgnoreDef1
  else
    IgnoreDef = IgnoreDef1 + IgnoreDef2
  end
  if 1 <= IgnoreDef then
    IgnoreDef = 1
  end
  local Refine = srcUser:GetProperty("Refine")
  local Def2 = targetUser:GetProperty("Def")
  local DefPer2 = targetUser:GetProperty("DefPer")
  local Vit2 = targetUser:GetProperty("Vit")
  local VitPer2 = targetUser:GetProperty("VitPer")
  local DamReduc2 = CommonFun.calcDamReDuc(srcUser, targetUser)
  local RefineDamReduc = targetUser:GetProperty("RefineDamReduc")
  local Hp2 = targetUser:GetProperty("Hp")
  local MaxHp2 = targetUser:GetProperty("MaxHp")
  local damChangePer = damageParam.damChangePer
  local AttrEffect = srcUser:GetProperty("AttrEffect")
  local bits = CommonFun.getBits(AttrEffect)
  local raceparam = CommonFun.CalcRaceParam(srcUser, targetUser, params, damageParam, logger)
  local bodyparam = CommonFun.CalcBodyParam(srcUser, targetUser, params, damageParam, logger)
  local elementparam = CommonFun.CalcElementParam(srcUser, targetUser, params, damageParam, logger)
  local bossparam = CommonFun.CalcBossParam(srcUser, targetUser, params, damageParam, logger)
  local raceparam2 = CommonFun.CalcRaceParam2(srcUser, targetUser, params, damageParam, logger)
  local bodyparam2 = CommonFun.CalcBodyParam2(srcUser, targetUser, params, damageParam, logger)
  local elementparam2 = CommonFun.CalcElementParam2(srcUser, targetUser, params, damageParam, logger)
  local bossparam2 = CommonFun.CalcBossParam2(srcUser, targetUser, params, damageParam, logger)
  local BaseAtk = Str * 2 + math.floor(Str * Str / 100) + math.floor(Dex / 5) + math.floor(Luk / 5)
  local AtkFinal = ((Atk - BaseAtk) * (1 + AtkPer) * CommonFun.ShapeCorrection(srcUser, targetUser) * bodyparam * elementparam * elementparam2 + BaseAtk) * raceparam * bossparam * bossparam2
  local DefReduc = CommonFun.CalcDef(srcUser, targetUser)
  local ShortRangeDamReduc2 = targetUser:GetProperty("ShortRangeDamReduc")
  local skillID, skillLevel = CommonFun.UnmergeSkillID(params.skillIDAndLevel)
  local MaxSp = targetUser:GetProperty("MaxSp")
  if skillID == 2734 then
    AtkFinal = (((Atk - BaseAtk) * (1 + AtkPer) + MaxSp) * CommonFun.ShapeCorrection(srcUser, targetUser) * bodyparam * elementparam * elementparam2 + BaseAtk) * raceparam * bossparam * bossparam2
  end
  if skillID == 2731 or skillID == 2732 or skillID == 2733 or skillID == 2734 or skillID == 2746 then
    local skilllv_bd = srcUser:GetLernedSkillLevel(2745)
    if 0 < skilllv_bd then
      damChangePer = (damChangePer + skilllv_bd * 0.2) * (1 + Vit / 800)
    end
  end
  local Num = srcUser:GetBuffLayer(137710)
  if skillID == 2740 then
    local GemValue = srcUser:GetGemValue(208121)
    damChangePer = damChangePer * (1 + Num * 0.1)
    if srcUser:HasBuffID(137700) then
      damChangePer = damChangePer * (1 + GemValue / 100000)
    end
  end
  local Hp = srcUser:GetProperty("Hp")
  local MaxHp = srcUser:GetProperty("MaxHp")
  if skillID == 2741 then
    local mapid, maptype = srcUser:GetMapInfo()
    local pvpRatio = 1
    if maptype == 2 or maptype == 4 then
      pvpRatio = 0.25
    end
    damChangePer = (damChangePer + Hp * pvpRatio / 50000) * (1 + Num * 0.1)
  end
  local tx_lv = srcUser:GetLernedSkillLevel(2730)
  local NormalAtkDam = srcUser:GetProperty("NormalAtkDam")
  local NormalEnd = 1 + NormalAtkDam
  if 7 <= tx_lv then
    damChangePer = damChangePer * NormalEnd
  end
  if srcUser:HasBuffID(137720) then
    local xm_lv = srcUser:GetLernedSkillLevel(2737)
    if 0.6 <= Hp / MaxHp then
      damChangePer = damChangePer * (1 + 0.05 * xm_lv)
    end
  end
  local A = (AtkFinal * DefReduc * (1 - DamReduc2) + Refine) * damChangePer * (1 - RefineDamReduc) * (1 + DamIncrease - ShortRangeDamReduc2) - Vit2 * (1 + VitPer2)
  local CriDamPer = srcUser:GetProperty("CriDamPer")
  local CriDefPer2 = targetUser:GetProperty("CriDefPer")
  local fushou = srcUser:GetEquipTypeByPos(1)
  local wuqi = srcUser:GetEquipTypeByPos(7)
  local WeaponNum = 0
  if fushou == 180 or fushou == 250 then
    WeaponNum = WeaponNum + 1
  end
  if wuqi == 180 or wuqi == 250 then
    WeaponNum = WeaponNum + 1
  end
  local Rate = (7 + 4 * tx_lv) * WeaponNum
  if 4 <= tx_lv then
    Rate = (7 + 4 * tx_lv) * WeaponNum + Num * 3
  end
  if CommonFun.IsInRate(Rate, srcUser:GetRandom()) then
    A = (AtkFinal * (1 - DamReduc2) + Refine) * damChangePer * (1 - RefineDamReduc) * (1 + DamIncrease - ShortRangeDamReduc2) - Vit2 * (1 + VitPer2)
    return math.max(A * (1.5 + CriDamPer - CriDefPer2), 1), CommonFun.DamageType.Crit
  end
  if A <= 1 then
    return 1
  end
  return A
end