夺纹掠势：剥了它的怒，披在我身上

 fx-buffsnatch

-- @file BuffSnatch.lua
-- 夺纹 —— 剥了它的怒，披在我身上

local BuffSnatch = {}

local CONST = {
    EMPOW_LIFE    = 8.0,
    SNATCH_CD     = 3.0,
    RAGE_BACK     = 8.0,

    COLOR_SNATCH  = "#b85848",
    COLOR_DEEP    = "#4e2018",
    COLOR_GHOST   = "#f0c0a8",

    ZORDER_SNATCH = 133,
    ZORDER_FX     = 135,
    AUTOINC_BASE  = 1079000,
}

local _empT      = 0
local _cdLeft    = 0
local _snatchFx  = nil
local _scheduler = nil
local _autoInc   = 0

local function GenID(prefix)
    _autoInc = _autoInc + 1
    return string.format("%s_%d", prefix or "BSN",
        CONST.AUTOINC_BASE + _autoInc)
end

local function GetActorPos(id)
    if not id then return nil end
    local x = SL:GetValue("ACTOR_POSITION_X", id)
    local y = SL:GetValue("ACTOR_POSITION_Y", id)
    if not x or not y then return nil end
    return { x = x, y = y }
end

local function SafeRemove(node)
    if node and not GUI:Widget_IsNull(node) then
        GUI:removeFromParent(node)
    end
end

local function ShowTip(msg)
    if msg and msg ~= "" then SL:ShowSystemTips(msg) end
end

function BuffSnatch.HasRage(tid)
    return tid and SL:HasBuff(tid, "RAGE_MARK") or false
end

function BuffSnatch.Cast()
    if _cdLeft > 0 then return end
    local tid = SL:GetValue("MARK_TARGET_ID")
    if not BuffSnatch.HasRage(tid) then
        ShowTip("它身上没怒纹——等它再怒起来")
        return
    end
    local myID = SL:GetValue("USER_ID")
    _cdLeft = CONST.SNATCH_CD
    SL:RemoveBuff(tid, "RAGE_MARK")
    SL:AddBuff(myID, "RAGE_MARK", CONST.EMPOW_LIFE)
    SL:PlaySnatchFlyFx(tid, myID)
    SL:TipAbove(tid, "夺！")
    _empT = CONST.EMPOW_LIFE
    SafeRemove(_snatchFx)
    _snatchFx = GUI:Layout_Create(GUI:Attach_SceneF(),
        GenID("Snatch"), 0, 0, 0, 0, false)
    GUI:setLocalZOrder(_snatchFx, CONST.ZORDER_SNATCH)
    ShowTip("怒纹剥下来了——八秒归你")
end

-- 定时器：借怒倒计时与光环跟脚
if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        _cdLeft = math.max(0, _cdLeft - dt)
        if _empT > 0 then
            _empT = _empT - dt
            local myID = SL:GetValue("USER_ID")
            local mp = GetActorPos(myID)
            if _snatchFx and mp then
                GUI:setPosition(_snatchFx, mp.x, mp.y - 100)
            end
            if _empT <= 0 then
                SafeRemove(_snatchFx)
                ShowTip("借来的怒散了——回到平常的刀")
            end
        end
    end, 0.02)
end

SL:ScheduleOnce(function()
    SL:BindDebugButton("夺纹", function()
        BuffSnatch.Cast()
    end)
    ShowTip("技能已加载: 夺纹 (调试按钮触发)")
end, 1.0)

function BuffSnatch.Unload()
    if _scheduler then SL:Unschedule(_scheduler) end
    SafeRemove(_snatchFx)
    _empT = 0
end

return BuffSnatch