借刀：站到它队友身后，借它自己的刀劈它

 fx-knifeloan

-- @file KnifeLoan.lua
-- 借刀 —— 站到它队友身后，借它自己的刀劈它

local KnifeLoan = {}

local CONST = {
    SWING_RADIUS  = 170,
    SWING_INNER   = 40,
    SWING_DMG     = 22,
    SWING_GAP     = 3.0,
    SWAP_CD       = 2.0,

    COLOR_SWAP    = "#88b0d0",
    COLOR_DEEP    = "#2a3e52",
    COLOR_GHOST   = "#d0e4f4",

    ZORDER_ZONE   = 128,
    ZORDER_FX     = 135,
    AUTOINC_BASE  = 1012000,
}

local _cdLeft    = 0
local _scheduler = nil
local _autoInc   = 0

local function GenID(prefix)
    _autoInc = _autoInc + 1
    return string.format("%s_%d", prefix or "KFL",
        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 LeaveGhost(id, x, y)
    local spr = SL:GetActorSprite(id)
    SL:DropGhostAt(id, x, y)
end

function KnifeLoan.Swap()
    if _cdLeft > 0 then
        ShowTip("脚在换——" .. string.format("%.1f", _cdLeft) .. "秒")
        return
    end
    local myID = SL:GetValue("USER_ID")
    local palID = SL:GetValue("MARK_SMALL_ID")
    local mp = GetActorPos(myID)
    local pp = GetActorPos(palID)
    if not mp or not pp then return end
    _cdLeft = CONST.SWAP_CD
    LeaveGhost(myID, mp.x, mp.y)
    LeaveGhost(palID, pp.x, pp.y)
    SL:SetActorPos(myID, pp.x, pp.y)
    SL:SetActorPos(palID, mp.x, mp.y)
    SL:PlaySwapFx(myID, palID)
    ShowTip("换位了——大的横扫圈里站的是它自己人")
end

-- 横扫结算：圈里认谁劈谁
local function DoSwing(bigID)
    local bp = GetActorPos(bigID)
    if not bp then return end
    local zoneL = bp.x - CONST.SWING_RADIUS
    local zoneR = bp.x - CONST.SWING_INNER
    local hitAny = false
    local palID = SL:GetValue("MARK_SMALL_ID")
    if palID and not SL:GetValue("ACTOR_DEAD", palID) then
        local pp = GetActorPos(palID)
        if pp and pp.x >= zoneL and pp.x <= zoneR then
            SL:ActorHurt(palID, CONST.SWING_DMG)
            SL:TipAbove(palID, "借刀-22")
            hitAny = true
        end
    end
    local myID = SL:GetValue("USER_ID")
    local mp = GetActorPos(myID)
    if mp and mp.x >= zoneL and mp.x <= zoneR then
        SL:ActorHurt(myID, 14)
        SL:TipAbove(myID, "-14")
        hitAny = true
    end
    if not hitAny then
        SL:TipAbove(bigID, "劈空")
    end
end

-- 定时器：横扫节拍
if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        _cdLeft = math.max(0, _cdLeft - dt)
        local bigID = SL:GetValue("MARK_TARGET_ID")
        if not bigID or SL:GetValue("ACTOR_DEAD", bigID) then
            return
        end
        _gap = (_gap or CONST.SWING_GAP) - dt
        if _gap <= 0 then
            _gap = CONST.SWING_GAP
            SL:PlaySwingFx(bigID)
            DoSwing(bigID)
        end
    end, 0.02)
end

SL:ScheduleOnce(function()
    SL:BindDebugButton("换位", function()
        KnifeLoan.Swap()
    end)
    ShowTip("技能已加载: 借刀 (调试按钮触发)")
end, 1.0)

function KnifeLoan.Unload()
    if _scheduler then SL:Unschedule(_scheduler) end
end

return KnifeLoan