local MissileSender = {}
local pool = {}
local curView = {}
local MovieClipPool = {}

local function GetObj()
    if #pool > 0 then
        local re = pool[#pool]
        re.visible = true
        pool[#pool] = nil
        return re
    end

    return UIPackage.CreateObjectFromURL("ui://Main_Majiang/Missile")
end

local function BackObj(obj)
    pool[#pool + 1] = obj
    obj.visible = false
end

local function GetMovieClip(url)
    local _pool = MovieClipPool[url]

    if _pool and #_pool > 0 then
        local re = _pool[#_pool]
        re.visible = true
        _pool[#_pool] = nil
        return re
    end

    return UIPackage.CreateObjectFromURL(url)
end

local function BackMovieClip(obj, url)
    if MovieClipPool[url] == nil then
        MovieClipPool[url] = {}
    end

    local _pool = MovieClipPool[url]
    _pool[#_pool + 1] = obj
    obj.visible = false
end

function MissileSender.Send(url, send, target, view, animUrl, num, time)
    if curView ~= view then
        pool = {}
    end

    curView = view

    local sendPos = send.xy  --Vector2.New(send.x + send.width/2, send.y + send.height/2)
    local targetPos = target.xy  --Vector2.New(target.x + target.width/2, target.y + target.height/2)

    for i = 1, num do
        local obj = GetObj()
        obj:GetChild("loader").url = url
        view:AddChild(obj)
        obj.width = send.width
        obj.height = send.height
        obj.xy = sendPos

        -- 间隔
        obj:TweenMove(obj.xy, i * 0.1):OnComplete(function()
            obj:TweenMove(targetPos, time):OnComplete(function()
                BackObj(obj)
                if i == num then
                    MissileSender.Animation(target, animUrl, view)
                end
            end)
        end)
    end
end

function MissileSender.Animation(target, animUrl, view)
    local e = GetMovieClip(animUrl)
    e:SetPlaySettings(1, -1, 1, -1)
    e.onPlayEnd:Set(function()
        e.visible = false
        BackMovieClip(e, animUrl)
    end)
    view:AddChild(e)
    e.width = target.width
    e.height = target.height
    e.xy = target.xy
end

return MissileSender