碎地砖纹：它的爪子砸塌自己脚下的地

 fx-brittlefloor

-- @file BrittleFloor.lua
-- 碎地砖纹 —— 它的爪子砸塌自己脚下的地

local BrittleFloor = {}

local CONST = {
    CREST_LIFE    = 12.0,
    CREST_CD      = 4.0,
    TILE_CAP      = 3,
    SINK_LIFE     = 1.2,
    SINK_DMG      = 20,
    REGROW_LIFE   = 2.0,

    COLOR_TILE    = "#9088a0",
    COLOR_DEEP    = "#383048",
    COLOR_GHOST   = "#d0c8e0",

    ZORDER_TILE   = 88,
    ZORDER_FX     = 135,
    AUTOINC_BASE  = 1112000,
}

local _crestT    = 0
local _cdLeft    = 0
local _crackN    = 0
local _sinkT     = 0
local _regrowT   = 0
local _tid       = 0
local _tileFx    = nil
local _scheduler = nil
local _autoInc   = 0

local function GenID(prefix)
    _autoInc = _autoInc + 1
    return string.format("%s_%d", prefix or "BFL",
        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 BrittleFloor.Cracks()
    return _crackN
end

-- 裂痕累计：它每一次出手都砸裂一块
SL:RegisterLUAEvent(LUA_EVENT_AFTER_ACTION, "BFL_Crack", function(tid)
    if _crestT <= 0 or tid ~= _tid or _sinkT > 0 then
        return
    end
    _crackN = math.min(CONST.TILE_CAP, _crackN + 1)
    SL:TipAbove(tid, "裂!")
    SL:PlayCrackFx(tid)
end)

-- 塌陷结算：三块裂满连砖带怪一起陷
local function Collapse()
    _sinkT = CONST.SINK_LIFE
    SL:ActorHurt(_tid, CONST.SINK_DMG)
    SL:TipAbove(_tid, "塌-" .. CONST.SINK_DMG)
    SL:AddBuff(_tid, "SUNK", CONST.SINK_LIFE)
    SL:PlayCollapseFx(_tid)
    _crackN = 0
    ShowTip("塌了——它自己的爪子砸塌的")
end

function BrittleFloor.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
    _crackN = 0
    _sinkT = 0
    _regrowT = 0
    _tid = tid
    SafeRemove(_tileFx)
    _tileFx = GUI:Layout_Create(GUI:Attach_Scene(),
        GenID("Tile"), 0, 0, 0, 0, false)
    GUI:setLocalZOrder(_tileFx, CONST.ZORDER_TILE)
    SL:PlayTileUpFx(tid)
    ShowTip("砖铺上了——它每一爪砸裂一块，三块一塌")
end

-- 定时器：砖期倒计时、塌陷消化与清账
if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        _cdLeft = math.max(0, _cdLeft - dt)
        if _sinkT > 0 then
            _sinkT = _sinkT - dt
            if _sinkT <= 0 then
                SL:RemoveBuff(_tid, "SUNK")
                _regrowT = CONST.REGROW_LIFE
                ShowTip("它爬出来了——砖重新铺好")
            end
        end
        if _regrowT > 0 then
            _regrowT = _regrowT - dt
        end
        if _crestT > 0 then
            _crestT = _crestT - dt
            if _crestT <= 0 then
                SafeRemove(_tileFx)
                ShowTip("砖收了——地面还原")
            end
        end
    end, 0.02)
end

SL:ScheduleOnce(function()
    SL:BindDebugButton("铺砖", function()
        BrittleFloor.Cast()
    end)
    ShowTip("技能已加载: 碎地纹 (调试按钮触发)")
end, 1.0)

function BrittleFloor.Unload()
    if _scheduler then SL:Unschedule(_scheduler) end
    SL:UnregisterLUAEvent(LUA_EVENT_AFTER_ACTION, "BFL_Crack")
    if _tid ~= 0 then SL:RemoveBuff(_tid, "SUNK") end
    SafeRemove(_tileFx)
    _crestT = 0
    _crackN = 0
    _sinkT = 0
end

return BrittleFloor