接龙令纹：换手接龙，龙接得越长刀越重

 fx-chainlink

-- @file ChainLink.lua
-- 接龙令纹 —— 换手接龙，龙接得越长刀越重

local ChainLink = {}

local CONST = {
    CREST_LIFE    = 12.0,
    CREST_CD      = 4.0,
    AMP_STEP      = 4,
    AMP_CAP       = 12,

    COLOR_CHAIN   = "#c8a058",
    COLOR_DEEP    = "#584018",
    COLOR_GHOST   = "#f4e4b0",

    ZORDER_CHAIN  = 133,
    ZORDER_FX     = 135,
    AUTOINC_BASE  = 1132000,
}

local _crestT    = 0
local _cdLeft    = 0
local _chainAmp  = 0
local _lastKey   = ""
local _crestFx   = nil
local _scheduler = nil
local _autoInc   = 0

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

-- 户牌：拿代号当钥匙，不用物件引用
function ChainLink.KeyOf(tid)
    if tid == SL:GetValue("FLOCK_FIRST") then return "A" end
    if tid == SL:GetValue("FLOCK_SECOND") then return "B" end
    return "?"
end

-- 换手判定与重刀结算：落刀那一拍比户牌
SL:RegisterLUAEvent(LUA_EVENT_MELEE_HIT, "CLK_Link", function(tid)
    if _crestT <= 0 or not tid then return 0 end
    local key = ChainLink.KeyOf(tid)
    if key == "?" then return 0 end
    if _lastKey == key then
        _chainAmp = 0
        SL:TipAbove(tid, "龙断")
    else
        _chainAmp = math.min(CONST.AMP_CAP,
            _chainAmp + CONST.AMP_STEP)
        SL:TipAbove(tid, "接!")
    end
    _lastKey = key
    return _chainAmp
end)

function ChainLink.Cast()
    if _cdLeft > 0 or _crestT > 0 then return end
    local tid = SL:GetValue("MARK_TARGET_ID")
    if not tid then return end
    local other = SL:FindNearMonster(tid, 300)
    if not other then
        ShowTip("就一只怪——龙没处接")
        return
    end
    _cdLeft = CONST.CREST_CD
    _crestT = CONST.CREST_LIFE
    _chainAmp = 0
    _lastKey = ""
    SL:SetValue("FLOCK_FIRST", tid)
    SL:SetValue("FLOCK_SECOND", other)
    SafeRemove(_crestFx)
    _crestFx = GUI:Layout_Create(GUI:Attach_SceneF(),
        GenID("Chain"), 0, 0, 0, 0, false)
    GUI:setLocalZOrder(_crestFx, CONST.ZORDER_CHAIN)
    SL:PlayChainUpFx(tid)
    ShowTip("龙接上了——换手一刀重四分，连着砍一头就断龙")
end

-- 定时器：纹成倒计时与龙珠跟画
if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        _cdLeft = math.max(0, _cdLeft - dt)
        if _crestT > 0 then
            _crestT = _crestT - dt
            local myID = SL:GetValue("USER_ID")
            local mp = GetActorPos(myID)
            if _crestFx and mp then
                GUI:setPosition(_crestFx, mp.x, mp.y - 62)
            end
            if _crestT <= 0 then
                SafeRemove(_crestFx)
                ShowTip("龙散了——回到平常的刀")
            end
        end
    end, 0.02)
end

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

function ChainLink.Unload()
    if _scheduler then SL:Unschedule(_scheduler) end
    SL:UnregisterLUAEvent(LUA_EVENT_MELEE_HIT, "CLK_Link")
    SafeRemove(_crestFx)
    _crestT = 0
    _chainAmp = 0
    _lastKey = ""
end

return ChainLink