挪移换式：看它的招换你的式，对上了双倍

 fx-stancecycle

-- @file StanceCycle.lua
-- 挪移换式 —— 看它的招换你的式，对上了双倍

local StanceCycle = {}

local CONST = {
    STYLE_COUNT   = 3,
    COUNTER_AMP   = 2.0,
    TELL_GAP      = 2.4,

    COLOR_STANCE  = "#6a8a58",
    COLOR_DEEP    = "#2a3a18",
    COLOR_GHOST   = "#d0e8b0",

    ZORDER_TELL   = 134,
    ZORDER_FX     = 135,
    AUTOINC_BASE  = 1041000,
}

local STYLES     = { "劈", "刺", "扫" }
local COUNTER    = { 劈 = "扫", 扫 = "刺", 刺 = "劈" }

local _stance    = 1
local _tell      = 2
local _tellT     = 0
local _tellFx    = nil
local _scheduler = nil
local _autoInc   = 0

local function GenID(prefix)
    _autoInc = _autoInc + 1
    return string.format("%s_%d", prefix or "STC",
        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 StanceCycle.Cycle()
    _stance = _stance % CONST.STYLE_COUNT + 1
    SL:PlayCycleFx(SL:GetValue("USER_ID"), _stance)
    SL:TipAboveMe("换式·" .. STYLES[_stance])
    ShowTip("换到「" .. STYLES[_stance] .. "」式——它的下一手是「"
        .. STYLES[_tell] .. "」")
end

-- 相克判定：出刀前对式
SL:RegisterLUAEvent(LUA_EVENT_MELEE_HIT, "STC_Amp", function(tid)
    if COUNTER[STYLES[_tell]] == STYLES[_stance] then
        return math.floor(10 * CONST.COUNTER_AMP)
            - (SL:GetValue("HIT_DAMAGE", tid) or 10)
    end
    return 0
end)

-- 定时器：它的下一手轮转
if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        _tellT = _tellT + dt
        if _tellT >= CONST.TELL_GAP then
            _tellT = 0
            _tell = _tell % CONST.STYLE_COUNT + 1
            SL:PlayTellSwapFx(_tell)
            ShowTip("它换了招——现在是「" .. STYLES[_tell]
                .. "」，看准再换式")
        end
    end, 0.02)
end

SL:ScheduleOnce(function()
    SL:BindDebugButton("换式", function()
        StanceCycle.Cycle()
    end)
    ShowTip("技能已加载: 挪移换式 (调试按钮触发)")
end, 1.0)

function StanceCycle.Unload()
    if _scheduler then SL:Unschedule(_scheduler) end
    SafeRemove(_tellFx)
    _stance = 1
end

return StanceCycle