悬针坠纹：你的每一刀，都是按针下按的一寸

 fx-needledrop

-- @file NeedleDrop.lua
-- 悬针纹 —— 你的每一刀，都是按针下按的一寸

local NeedleDrop = {}

local CONST = {
    CREST_LIFE    = 14.0,
    CREST_CD      = 4.0,
    NEEDLE_CAP    = 5,
    DROP_DMG      = 18,
    BASE_HIT      = 12,
    SINK_OFFSET   = 15,

    COLOR_NEEDLE  = "#98a8c8",
    COLOR_DEEP    = "#384860",
    COLOR_GHOST   = "#d8e4f4",

    ZORDER_NEEDLE = 140,
    ZORDER_FX     = 135,
    AUTOINC_BASE  = 1114000,
}

local _crestT    = 0
local _cdLeft    = 0
local _needleN   = 0
local _needleFx  = nil
local _scheduler = nil
local _autoInc   = 0

local function GenID(prefix)
    _autoInc = _autoInc + 1
    return string.format("%s_%d", prefix or "NDD",
        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 NeedleDrop.Depth()
    return _needleN
end

-- 按针结算：每一刀把针按下一寸
SL:RegisterLUAEvent(LUA_EVENT_MELEE_HIT, "NDD_Sink", function(tid)
    if _crestT <= 0 or not tid then return 0 end
    _needleN = _needleN + 1
    SL:TipAbove(tid, "沉一寸")
    if _needleN >= CONST.NEEDLE_CAP then
        NeedleDrop.Drop(tid)
    end
    return 0
end)

-- 落针清算：五寸按满，针尖落地算总账
function NeedleDrop.Drop(tid)
    _needleN = 0
    SL:ActorHurt(tid, CONST.DROP_DMG)
    SL:TipAbove(tid, "落针-" .. CONST.DROP_DMG)
    SL:PlayNeedleDropFx(tid)
    ShowTip("落针了——十八点扎进天灵盖")
end

function NeedleDrop.Cast()
    if _cdLeft > 0 or _crestT > 0 then return end
    local tid = SL:GetValue("MARK_TARGET_ID")
    if not tid then return end
    _cdLeft = CONST.CREST_CD
    _crestT = CONST.CREST_LIFE
    _needleN = 0
    SafeRemove(_needleFx)
    _needleFx = GUI:Layout_Create(GUI:Attach_SceneF(),
        GenID("Needle"), 0, 0, 0, 0, false)
    GUI:setLocalZOrder(_needleFx, CONST.ZORDER_NEEDLE)
    SL:PlayNeedleUpFx(tid)
    ShowTip("针悬上了——每一刀按它下沉一寸，五寸落针")
end

-- 定时器：纹成倒计时与悬针跟画
if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        _cdLeft = math.max(0, _cdLeft - dt)
        if _crestT > 0 then
            _crestT = _crestT - dt
            local tid = SL:GetValue("MARK_TARGET_ID")
            local tp = tid and GetActorPos(tid)
            if _needleFx and tp then
                GUI:setPosition(_needleFx, tp.x, tp.y)
            end
            if _crestT <= 0 then
                SafeRemove(_needleFx)
                ShowTip("纹收了——没按到底的针回了天")
            end
        end
    end, 0.02)
end

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

function NeedleDrop.Unload()
    if _scheduler then SL:Unschedule(_scheduler) end
    SL:UnregisterLUAEvent(LUA_EVENT_MELEE_HIT, "NDD_Sink")
    SafeRemove(_needleFx)
    _crestT = 0
    _needleN = 0
end

return NeedleDrop