偷时快纹：它的刀慢半拍，你的刀快一倍

 fx-timesteal

-- @file TimeSteal.lua
-- 偷时纹 —— 它的刀慢半拍，你的刀快一倍

local TimeSteal = {}

local CONST = {
    STEAL_LIFE    = 10.0,
    STEAL_CD      = 5.0,
    MY_FAST_GAP   = 1.0,
    MY_BASE_GAP   = 1.4,
    FOE_SLOW_GAP  = 3.0,

    COLOR_STEAL   = "#5088a8",
    COLOR_DEEP    = "#1e3848",
    COLOR_GHOST   = "#b8d8e8",

    ZORDER_STEAL  = 133,
    ZORDER_FX     = 135,
    AUTOINC_BASE  = 1091000,
}

local _stealT    = 0
local _cdLeft    = 0
local _stealFx   = nil
local _scheduler = nil
local _autoInc   = 0

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

-- 双端节拍：出手计时器每拍读活账
function TimeSteal.MyGap()
    if _stealT > 0 then return CONST.MY_FAST_GAP end
    return CONST.MY_BASE_GAP
end

function TimeSteal.FoeGap()
    if _stealT > 0 then return CONST.FOE_SLOW_GAP end
    return SL:GetValue("ACTOR_ATK_GAP",
        SL:GetValue("MARK_TARGET_ID"))
end

function TimeSteal.Cast()
    if _cdLeft > 0 or _stealT > 0 then return end
    local tid = SL:GetValue("MARK_TARGET_ID")
    if not tid then return end
    _cdLeft = CONST.STEAL_CD
    _stealT = CONST.STEAL_LIFE
    SafeRemove(_stealFx)
    _stealFx = GUI:Layout_Create(GUI:Attach_SceneF(),
        GenID("Steal"), 0, 0, 0, 0, false)
    GUI:setLocalZOrder(_stealFx, CONST.ZORDER_STEAL)
    SL:PlayStealUpFx(tid)
    SL:PlayHasteUpFx(SL:GetValue("USER_ID"))
    ShowTip("偷时纹开了——你的刀一秒一挥，它的刀三秒一爪")
end

-- 节拍归位：窗口到期把两端的钟都还回去
local function RestoreTempo()
    _stealT = 0
    SafeRemove(_stealFx)
    _stealFx = nil
    ShowTip("时还完了——节拍回到平常")
end

-- 定时器：窗口倒计时与双端跟画
if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        _cdLeft = math.max(0, _cdLeft - dt)
        if _stealT > 0 then
            _stealT = _stealT - dt
            if _stealT <= 0 then
                RestoreTempo()
                return
            end
            local myID = SL:GetValue("USER_ID")
            local tid = SL:GetValue("MARK_TARGET_ID")
            local mp = GetActorPos(myID)
            local tp = tid and GetActorPos(tid)
            if _stealFx and mp and tp then
                GUI:setPosition(_stealFx,
                    (mp.x + tp.x) / 2, mp.y - 62)
            end
        end
    end, 0.02)
end

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

function TimeSteal.Unload()
    if _scheduler then SL:Unschedule(_scheduler) end
    SafeRemove(_stealFx)
    _stealT = 0
end

return TimeSteal