换契互纹：它的怒换我的甲，十秒一换

 fx-contractswap

-- @file ContractSwap.lua
-- 换契互纹 —— 它的怒换我的甲，十秒一换

local ContractSwap = {}

local CONST = {
    SWAP_LIFE     = 10.0,
    SWAP_CD       = 3.0,
    RAGE_AMP      = 6,
    BASE_HIT      = 12,

    COLOR_SWAP    = "#b07888",
    COLOR_DEEP    = "#483030",
    COLOR_GHOST   = "#f0c8d8",

    ZORDER_SWAP   = 133,
    ZORDER_FX     = 135,
    AUTOINC_BASE  = 1121000,
}

local _swapT     = 0
local _cdLeft    = 0
local _myRage    = 0
local _swapFx    = nil
local _scheduler = nil
local _autoInc   = 0

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

-- 交换白名单：命根子的加持不进契
local PROTECTED = {
    REGEN_MARK = true,
    DEATHWARD  = true,
}

function ContractSwap.CanSwap(buffID)
    return not PROTECTED[buffID]
end

function ContractSwap.Swap()
    if _cdLeft > 0 or _swapT > 0 then return end
    local tid = SL:GetValue("MARK_TARGET_ID")
    local myID = SL:GetValue("USER_ID")
    if not tid or not myID then return end
    _cdLeft = CONST.SWAP_CD
    _swapT = CONST.SWAP_LIFE
    local moved = 0
    for _, buffID in ipairs(SL:EnumBuff(tid)) do
        if ContractSwap.CanSwap(buffID) then
            SL:RemoveBuff(tid, buffID)
            SL:AddBuff(myID, buffID, CONST.SWAP_LIFE)
            moved = moved + 1
        end
    end
    for _, buffID in ipairs(SL:EnumBuff(myID)) do
        if ContractSwap.CanSwap(buffID) then
            SL:RemoveBuff(myID, buffID)
            SL:AddBuff(tid, buffID, CONST.SWAP_LIFE)
            moved = moved + 1
        end
    end
    if moved > 0 then
        _myRage = CONST.RAGE_AMP
        SL:TipAboveMe("借怒!")
        ShowTip("契换了——它的怒归你，你的甲归它")
    else
        ShowTip("两边都没可换的加持——白契一张")
    end
end

-- 定时器：契期倒计时与到期回换
if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        _cdLeft = math.max(0, _cdLeft - dt)
        if _swapT > 0 then
            _swapT = _swapT - dt
            if _swapT <= 0 then
                _myRage = 0
                ShowTip("契换回来了——它的怒回了它身上")
            end
        end
    end, 0.02)
end

SL:ScheduleOnce(function()
    SL:BindDebugButton("换契", function()
        ContractSwap.Swap()
    end)
    ShowTip("技能已加载: 换契纹 (调试按钮触发)")
end, 1.0)

function ContractSwap.Unload()
    if _scheduler then SL:Unschedule(_scheduler) end
    SafeRemove(_swapFx)
    _swapT = 0
    _myRage = 0
end

return ContractSwap