local UIBattleMultiBossPanel = UIViewClass() -- 从 UIBattleLevelPanel  分离出来的界面

local DISTANCE_AM_BREAK_SQR = 900  --显示破甲特效的距离
local BOSS_LIFE_BAR_STRIDE = -100

local DISTANCE_IN_TARGET = 35*35 -- 和 ExpUISystem 一样
local DISTANCE_OUT_TARGET = 60*60 -- 和 ExpUISystem 一样

function UIBattleMultiBossPanel:OnCreated()
	self.bossLifeBarDic = {}
	self.bossLifeBarList = {} -- 隐藏和显示的所有bossUI
	self.activeUIBossEntityIDList = {} -- 所显示的boss条的 boss的 EntityID 
end

function UIBattleMultiBossPanel:OnOpened()
	self:RegistSystemEvent(EventID.UIBattle_Level_OnBossBorn, self.OnBossBorn)
	self:RegistSystemEvent(EventID.UIBattle_Level_OnBossListChanged, self.OnBossListChanged)
	self:RegistSystemEvent(EventID.Camera_TargetChange, self.SetCameraTarget)
	self:RegistSystemEvent(EventID.UIBattle_BossAMChanged, self.OnAMChanged)

	self:StartRepeatFunc(self.OnUpdateFun, 1)
	self:SetPushStyle(LuaConst.PushStyleEnum.HIDE)

	local entityDic = BattleDataGetter.GetEntityDic()
	for i,entity in pairs(entityDic) do
		if entity:IsBoss() then
			self:OnBossBorn(entity)			
		end
	end
end

function UIBattleMultiBossPanel:OnUpdateFun(deltaTime, timeSinceUpdate)

	--组队副本得减去前置关卡的耗时	
	local mainEntityPos = BattleDataGetter.GetMainEntityLogicPos()
	if mainEntityPos then
		local bossList = BattleDataGetter.GetBossList()
		local changed = false
		for i,bossEntity in ipairs(bossList) do
			local bossEntityID = bossEntity.EntityID
			local distanceSqr = FP.tonumberV1(mainEntityPos:DistanceSqr(bossEntity:GetLogicPos()))
			if distanceSqr <= DISTANCE_IN_TARGET then
				if not table.containValue(self.activeUIBossEntityIDList, bossEntityID) then
					table.insert(self.activeUIBossEntityIDList, bossEntityID)
					local view = self.bossLifeBarDic[bossEntityID]
					if view then
						view:ActiveUI()
					else
						logging.error(LTAG.ERROR , " [gws]: 显示bossUI时发现它找不到了 ：", bossEntityID)
					end
					changed = true
				end
			elseif distanceSqr > DISTANCE_OUT_TARGET then
				if table.containValue(self.activeUIBossEntityIDList, bossEntityID) then
					table.removebyvalue(self.activeUIBossEntityIDList, bossEntityID)
					local view = self.bossLifeBarDic[bossEntityID]
					if view then
						view:HideUI()
					else
						logging.error(LTAG.ERROR , " [gws]: 隐藏bossUI时发现它找不到了 ：", bossEntityID)
					end
					changed = true
				end
			end
		end
		if changed then
			self:RefreshLayoutUI()
		end
	end
	
end

function UIBattleMultiBossPanel:CreateBossLifeBar(entityID)
	local view = self.canvas_BossInfo:OpenView(GetViewClass(Const_UI_Lua.UIEnum.UIBattleBossBattleInfoView), {entityID = entityID})
	view:HideUI()
	self.bossLifeBarDic[entityID] = view
	table.insert(self.bossLifeBarList,view)
	return view
end

--region --*************** 关卡boss信息 ***************--
function UIBattleMultiBossPanel:OnBossBorn(entity)
	local entityID = entity.EntityID
	self:CreateBossLifeBar(entityID)
end

-- boss 死亡
function UIBattleMultiBossPanel:OnBossListChanged(entity, isDead)
	if isDead then
		local view = self.bossLifeBarDic[entity.EntityID]
		if view then
			table.removebyvalue(self.bossLifeBarList, view)
			self.bossLifeBarDic[entity.EntityID] = nil
			view:CloseView()
			if table.containValue(self.activeUIBossEntityIDList, entity.EntityID) then
				table.removebyvalue(self.activeUIBossEntityIDList, entity.EntityID)
				self:RefreshLayoutUI()
			end
		end
	end	
end

--endregion 关卡boss信息

function UIBattleMultiBossPanel:OnAMChanged(am, maxAm, lastAm, entity)
	if am <= 0 and #self.activeUIBossEntityIDList == 1 then -- 只有一个boss的时候才播放特效
		--破甲特效放在这里了。策划新需求是得判断距离。
		local mainEntityPos = BattleDataGetter.GetMainEntityLogicPos()
		if mainEntityPos then
			if FP.tonumberV1(mainEntityPos:DistanceSqr(entity:GetLogicPos())) < DISTANCE_AM_BREAK_SQR then
				SystemManager.ShowPSEffect(entity, ConstAssetPathConfig.RelativeEffect.Func_BossWeak_Relative)
			end
		end
	end
end


function UIBattleMultiBossPanel:RefreshLayoutUI()	
	local tooOften = self.lastSelectEntityTime and (UTL.Time.GetServerTimestamp() - self.lastSelectEntityTime < 0.2)
	local selectView = self.curSelectEntityID and self.bossLifeBarDic[self.curSelectEntityID] or nil
	local count = #self.activeUIBossEntityIDList
	if count > 1 then
		local width = count == 3 and 470 or 545
		local scale = 0.6				
		-- 无选中 ,都一样的大小
		local startPos = width * scale / 2 - (width * scale * count) / 2
		for i =1 ,count do
			local view = self.bossLifeBarDic[self.activeUIBossEntityIDList[i]]
			view:SetBossHPBarWidth(width)
			--local viewTrans = self.activeUIBossEntityIDList[i].gameObject.transform				
			self:SetBossHpUIPosAndScale(view, startPos, scale, tooOften)
			startPos = startPos + scale * width
		end

	elseif count > 0 then
		local view = self.bossLifeBarDic[self.activeUIBossEntityIDList[1]]
		view:SetBossHPBarWidth(620)
		view.gameObject.transform:SetLocalPosition(0, 0, 0)
		view.gameObject.transform:SetLocalScale(1, 1, 1)
	end
	
end

function UIBattleMultiBossPanel:SetCameraTarget(entityID)
	self.curSelectEntityID = entityID
	self:RefreshLayoutUI()
	self.lastSelectEntityTime = UTL.Time.GetServerTimestamp()
end

function UIBattleMultiBossPanel:SetBossHpUIPosAndScale(view, posX, scale, tooOften)
	local y = scale == 1 and 0 or 15
	view.gameObject.transform:SetLocalPosition(posX, y, 0)
	view.gameObject.transform:SetLocalScale(scale, scale, scale)
end
return UIBattleMultiBossPanel