墨守：墨线画三笔，成阵挡一刀

 fx-inkward

-- @file InkWard.lua
-- 墨守 —— 墨线画三笔，成阵挡一刀

local InkWard = {}

local CONST = {
    INK_MAX       = 3,
    INK_REGEN     = 4.0,
    STROKES_NEED  = 3,

    COLOR_INK     = "#4a5ac8",
    COLOR_DEEP    = "#1a2060",
    COLOR_GHOST   = "#b8c0f0",

    ZORDER_WARD   = 131,
    ZORDER_FX     = 135,
    AUTOINC_BASE  = 1023000,
}

local _ink       = CONST.INK_MAX
local _inkT      = 0
local _strokes   = 0
local _wardOn    = false
local _wardFx    = nil
local _scheduler = nil
local _autoInc   = 0

local function GenID(prefix)
    _autoInc = _autoInc + 1
    return string.format("%s_%d", prefix or "IKW",
        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 CompleteWard()
    _wardOn = true
    _strokes = 0
    SL:PlayWardUpFx(SL:GetValue("USER_ID"))
    SL:TipAboveMe("墨阵成")
    ShowTip("三笔成阵——下一刀整刀挡下")
end

function InkWard.Stroke()
    if _wardOn then
        ShowTip("阵还开着——挡完再画")
        return
    end
    if _ink < 1 then
        ShowTip("墨干了——" .. string.format("%.1f", _inkT) .. "秒回一笔")
        return
    end
    _ink = _ink - 1
    _strokes = _strokes + 1
    SL:PlayStrokeFx(SL:GetValue("USER_ID"), _strokes)
    if _strokes >= CONST.STROKES_NEED then
        CompleteWard()
    else
        ShowTip("一笔落定——还差" .. (CONST.STROKES_NEED - _strokes) .. "笔成阵")
    end
end

-- 挡刀结算：阵在则整刀免
SL:RegisterLUAEvent(LUA_EVENT_BEFORE_HURT, "IKW_Block", function(tid, dmg)
    if _wardOn and tid == SL:GetValue("USER_ID") then
        _wardOn = false
        SafeRemove(_wardFx)
        _wardFx = nil
        SL:PlayWardBreakFx(SL:GetValue("USER_ID"))
        SL:TipAboveMe("挡！")
        ShowTip("阵接了这一刀——整刀挡下，墨纸碎一阵")
        return 0
    end
    return dmg
end)

-- 定时器：回墨与阵环跟脚
if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        if _ink < CONST.INK_MAX then
            _inkT = _inkT + dt
            if _inkT >= CONST.INK_REGEN then
                _inkT = 0
                _ink = _ink + 1
            end
        end
        if _wardOn and _wardFx then
            local myID = SL:GetValue("USER_ID")
            local mp = GetActorPos(myID)
            if _wardFx and mp then
                GUI:setPosition(_wardFx, mp.x, mp.y - 52)
            end
        end
    end, 0.02)
end

SL:ScheduleOnce(function()
    SL:BindDebugButton("落笔", function()
        InkWard.Stroke()
    end)
    ShowTip("技能已加载: 墨守 (调试按钮触发)")
end, 1.0)

function InkWard.Unload()
    if _scheduler then SL:Unschedule(_scheduler) end
    SL:UnregisterLUAEvent(LUA_EVENT_BEFORE_HURT, "IKW_Block")
    SafeRemove(_wardFx)
    _wardOn = false
    _strokes = 0
end

return InkWard