借风顺纹：它劈空的一刀，借给你当劲

 fx-windborrow

-- @file WindBorrow.lua
-- 借风顺纹 —— 它劈空的一刀，借给你当劲

local WindBorrow = {}

local CONST = {
    CREST_LIFE    = 12.0,
    CREST_CD      = 4.0,
    WHIFF_RATE    = 0.25,
    BORROW_STEP   = 8,
    BORROW_CAP    = 24,

    COLOR_WIND    = "#88b8a8",
    COLOR_DEEP    = "#2e4840",
    COLOR_GHOST   = "#c0e8dc",

    ZORDER_WIND   = 133,
    ZORDER_FX     = 135,
    AUTOINC_BASE  = 1134000,
}

local _crestT    = 0
local _cdLeft    = 0
local _borrow    = 0
local _crestFx   = nil
local _scheduler = nil
local _autoInc   = 0

local function GenID(prefix)
    _autoInc = _autoInc + 1
    return string.format("%s_%d", prefix or "WBR",
        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 WindBorrow.Charge()
    return _borrow
end

-- 劈空侦测与借劲：它出招掷骰，劈空的劲入你的账
SL:RegisterLUAEvent(LUA_EVENT_BEFORE_HURT, "WBR_Gust", function(dmg)
    if _crestT <= 0 then return dmg end
    if math.random() < CONST.WHIFF_RATE then
        _borrow = math.min(CONST.BORROW_CAP,
            _borrow + CONST.BORROW_STEP)
        SL:TipAboveMe("借劲+" .. CONST.BORROW_STEP)
        return 0
    end
    return dmg
end)

-- 兑劲结算：你的下一刀把攒的劲一次兑清
SL:RegisterLUAEvent(LUA_EVENT_MELEE_DAMAGE, "WBR_Pay", function()
    if _borrow <= 0 then return 0 end
    local pay = _borrow
    _borrow = 0
    SL:TipAboveMe("兑劲!")
    return pay
end)

function WindBorrow.Cast()
    if _cdLeft > 0 or _crestT > 0 then return end
    local myID = SL:GetValue("USER_ID")
    _cdLeft = CONST.CREST_CD
    _crestT = CONST.CREST_LIFE
    _borrow = 0
    SafeRemove(_crestFx)
    _crestFx = GUI:Layout_Create(GUI:Attach_SceneF(),
        GenID("Gust"), 0, 0, 0, 0, false)
    GUI:setLocalZOrder(_crestFx, CONST.ZORDER_WIND)
    SL:PlayGustUpFx(myID)
    ShowTip("借风开了——它劈空的刀，劲都归你")
end

-- 定时器：纹成倒计时与风环跟画
if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        _cdLeft = math.max(0, _cdLeft - dt)
        if _crestT > 0 then
            _crestT = _crestT - dt
            local myID = SL:GetValue("USER_ID")
            local mp = GetActorPos(myID)
            if _crestFx and mp then
                GUI:setPosition(_crestFx, mp.x, mp.y - 62)
            end
            if _crestT <= 0 then
                SafeRemove(_crestFx)
                ShowTip("风停了——劈空的劲自己散了")
            end
        end
    end, 0.02)
end

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

function WindBorrow.Unload()
    if _scheduler then SL:Unschedule(_scheduler) end
    SL:UnregisterLUAEvent(LUA_EVENT_BEFORE_HURT, "WBR_Gust")
    SL:UnregisterLUAEvent(LUA_EVENT_MELEE_DAMAGE, "WBR_Pay")
    SafeRemove(_crestFx)
    _crestT = 0
    _borrow = 0
end

return WindBorrow