石肤：石肤护体，减伤但减速

 fx-stoneskin

-- @file StoneSkin.lua
-- 石肤 —— 石肤护体，减伤但减速

local StoneSkin = {}

local CONST = {
    SKIN_LIFE     = 8.0,
    SKIN_CD       = 6.0,
    CUT_PCT       = 0.5,
    MOVE_MULT     = 0.5,

    COLOR_SKIN    = "#a8a890",
    COLOR_DEEP    = "#4a4a32",
    COLOR_GHOST   = "#e0e0d0",

    ZORDER_SKIN   = 131,
    ZORDER_FX     = 135,
    AUTOINC_BASE  = 1067000,
}

local _skinT     = 0
local _cdLeft    = 0
local _skinFx    = nil
local _scheduler = nil
local _autoInc   = 0

local function GenID(prefix)
    _autoInc = _autoInc + 1
    return string.format("%s_%d", prefix or "SSK",
        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 StoneSkin.Cast()
    if _cdLeft > 0 or _skinT > 0 then return end
    local myID = SL:GetValue("USER_ID")
    if not myID then return end
    _cdLeft = CONST.SKIN_CD
    _skinT = CONST.SKIN_LIFE
    SL:SetActorRate(myID, "move", CONST.MOVE_MULT)
    SafeRemove(_skinFx)
    _skinFx = GUI:Layout_Create(GUI:Attach_SceneF(),
        GenID("Skin"), 0, 0, 0, 0, false)
    GUI:setLocalZOrder(_skinFx, CONST.ZORDER_SKIN)
    SL:PlayStoneUpFx(myID)
    SL:TipAboveMe("石肤！")
    ShowTip("石肤护体——八秒减伤五成但走路慢一半")
end

-- 减伤出口：石肤期的刀打五折
SL:RegisterLUAEvent(LUA_EVENT_BEFORE_HURT, "SSK_Cut", function(tid, dmg)
    if _skinT > 0 and tid == SL:GetValue("USER_ID") then
        return math.floor(dmg * CONST.CUT_PCT)
    end
    return dmg
end)

-- 定时器：石肤倒计时与石纹跟脚
if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        _cdLeft = math.max(0, _cdLeft - dt)
        if _skinT > 0 then
            _skinT = _skinT - dt
            local myID = SL:GetValue("USER_ID")
            local mp = GetActorPos(myID)
            if _skinFx and mp then
                GUI:setPosition(_skinFx, mp.x, mp.y - 52)
            end
            if _skinT <= 0 then
                SafeRemove(_skinFx)
                ShowTip("石肤碎了——恢复常态")
            end
        end
    end, 0.02)
end

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

function StoneSkin.Unload()
    if _scheduler then SL:Unschedule(_scheduler) end
    SL:UnregisterLUAEvent(LUA_EVENT_BEFORE_HURT, "SSK_Cut")
    SafeRemove(_skinFx)
    _skinT = 0
end

return StoneSkin