绝境回纹：血越少纹越亮，一口气回到满

 fx-lastgasp

-- @file LastGasp.lua
-- 绝境纹 —— 血越少纹越亮，一口气回到满

local LastGasp = {}

local CONST = {
    CREST_LIFE    = 10.0,
    CREST_CD      = 12.0,
    PULSE_GAP     = 1.0,
    BASE_HEAL     = 2,
    MISS_AMP      = 15,

    COLOR_GASP    = "#58a868",
    COLOR_DEEP    = "#1e4028",
    COLOR_GHOST   = "#c8f0c8",

    ZORDER_GASP   = 133,
    ZORDER_FX     = 135,
    AUTOINC_BASE  = 1083000,
}

local _gaspT     = 0
local _pulseGap  = 0
local _cdLeft    = 0
local _gaspFx    = nil
local _scheduler = nil
local _autoInc   = 0

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

local function MissRatio()
    local myID = SL:GetValue("USER_ID")
    local hp = SL:GetValue("ACTOR_HP", myID) or 0
    local hpM = SL:GetValue("ACTOR_HP_MAX", myID) or 1
    return 1 - hp / hpM
end

local function PulseHeal()
    local miss = MissRatio()
    local heal = math.floor(CONST.BASE_HEAL + miss * CONST.MISS_AMP)
    local myID = SL:GetValue("USER_ID")
    SL:HealActor(myID, heal)
    SL:TipAboveMe("+" .. heal)
    SL:PlayGaspPulseFx(myID, miss)
    return heal
end

function LastGasp.Cast()
    if _cdLeft > 0 or _gaspT > 0 then return end
    local myID = SL:GetValue("USER_ID")
    _cdLeft = CONST.CREST_CD
    _gaspT = CONST.CREST_LIFE
    _pulseGap = 0
    SafeRemove(_gaspFx)
    _gaspFx = GUI:Layout_Create(GUI:Attach_SceneF(),
        GenID("Gasp"), 0, 0, 0, 0, false)
    GUI:setLocalZOrder(_gaspFx, CONST.ZORDER_GASP)
    SL:PlayGaspUpFx(myID)
    SL:TipAboveMe("绝境纹！")
    ShowTip("绝境纹烧起来了——血越少回得越凶")
end

-- 定时器：心跳跳奶与纹环跟脚
if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        _cdLeft = math.max(0, _cdLeft - dt)
        if _gaspT > 0 then
            _gaspT = _gaspT - dt
            _pulseGap = _pulseGap + dt
            if _pulseGap >= CONST.PULSE_GAP then
                _pulseGap = 0
                PulseHeal()
            end
            local myID = SL:GetValue("USER_ID")
            local mp = GetActorPos(myID)
            if _gaspFx and mp then
                GUI:setPosition(_gaspFx, mp.x, mp.y - 62)
            end
            if _gaspT <= 0 then
                SafeRemove(_gaspFx)
                ShowTip("纹火熄了——十秒续命结束")
            end
        end
    end, 0.02)
end

SL:ScheduleOnce(function()
    SL:BindDebugButton("纹成", function()
        LastGasp.Cast()
    end)
    ShowTip("技能已加载: 绝境纹 (调试按钮触发)")
end, 1.0)

function LastGasp.Unload()
    if _scheduler then SL:Unschedule(_scheduler) end
    SafeRemove(_gaspFx)
    _gaspT = 0
end

return LastGasp