移祸：挨的刀一半转给它

 fx-blameshift

-- @file BlameShift.lua
-- 移祸 —— 挨的刀一半转给它，五秒转嫁期

local BlameShift = {}

local CONST = {
    SHIFT_LIFE    = 5.0,
    SHIFT_CD      = 6.0,
    SHARE_PCT     = 0.5,

    COLOR_SHIFT   = "#a078c8",
    COLOR_DEEP    = "#3a1a58",
    COLOR_GHOST   = "#d8c8f4",

    ZORDER_SHIFT  = 132,
    ZORDER_FX     = 135,
    AUTOINC_BASE  = 1062000,
}

local _shiftT    = 0
local _shiftID   = 0
local _cdLeft    = 0
local _shiftFx   = nil
local _scheduler = nil
local _autoInc   = 0

local function GenID(prefix)
    _autoInc = _autoInc + 1
    return string.format("%s_%d", prefix or "BMS",
        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 BlameShift.Cast()
    if _cdLeft > 0 or _shiftT > 0 then return end
    local tid = SL:GetValue("MARK_TARGET_ID")
    if not tid then return end
    _cdLeft = CONST.SHIFT_CD
    _shiftT = CONST.SHIFT_LIFE
    _shiftID = tid
    SafeRemove(_shiftFx)
    _shiftFx = GUI:Layout_Create(GUI:Attach_SceneF(),
        GenID("Shift"), 0, 0, 0, 0, false)
    GUI:setLocalZOrder(_shiftFx, CONST.ZORDER_SHIFT)
    SL:PlayShiftUpFx(tid)
    SL:TipAbove(tid, "移祸！")
    ShowTip("转嫁开了——五秒它打你的刀一半弹回去")
end

-- 弹回结算：转嫁期怪的攻击一半弹回去
SL:RegisterLUAEvent(LUA_EVENT_MONSTER_STRIKE, "BMS_Back", function(tid, dmg)
    if _shiftT > 0 and tid == _shiftID and dmg > 0 then
        local back = math.floor(dmg * CONST.SHARE_PCT)
        SL:ActorHurt(tid, back)
        SL:TipAbove(tid, "弹-" .. back)
        SL:PlayShiftBackFx(tid)
        ShowTip("弹回去了——" .. back .. "点转嫁给它")
    end
end)

-- 定时器：转嫁倒计时与紫环跟脚
if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        _cdLeft = math.max(0, _cdLeft - dt)
        if _shiftT > 0 then
            _shiftT = _shiftT - dt
            local tp = GetActorPos(_shiftID)
            if _shiftFx and tp then
                GUI:setPosition(_shiftFx, tp.x, tp.y - 70)
            end
            if _shiftT <= 0 or not tp
                or SL:GetValue("ACTOR_DEAD", _shiftID) then
                _shiftT = 0
                SafeRemove(_shiftFx)
                ShowTip("转嫁散了——刀刀归位")
            end
        end
    end, 0.02)
end

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

function BlameShift.Unload()
    if _scheduler then SL:Unschedule(_scheduler) end
    SL:UnregisterLUAEvent(LUA_EVENT_MONSTER_STRIKE, "BMS_Back")
    SafeRemove(_shiftFx)
    _shiftT = 0
end

return BlameShift