UITabBarView = UITabBarView or BaseClass(BaseComponent)
local UITabBarView = UITabBarView
local math_abs = math.abs 

function UITabBarView:__init(parent_wnd,prefab_asset,layer_name,view_style,is_scroll)
	self.view_style = view_style
	self.is_scroll = is_scroll
end

--[[@
功能:	
参数:	
		tabbar_list 		标签名字数组 ({name, ...})
		switch_callback 	切换回调
		tabbar_style		标签样式，默认为1
		extra_arg_table 	额外参数列表
返回值：
]]
function UITabBarView:SetData(tabbar_list, switch_callback, tabbar_style, linebg_size_callback,extra_arg_table)
	self.curr_tabBtn_index = 0
	self.tabbar_item_list = {}
	self.linebg_size_callback = linebg_size_callback
	self.tabbar_list = tabbar_list
	self.switch_callback = switch_callback
	self.tabbar_style = tabbar_style
	self.extra_arg_table = extra_arg_table
	self.parms = UITabButton.Style[self.tabbar_style or 1] or UITabButton.Style[1]
	self:CreateGameObject(UIType.Image3, "tab_line_bg")
end

function UITabBarView:LoadSuccess()
	self.line_bg = self.gameObject:GetComponent("Image")
	self:LoadTabBarPrefab()
	self:UpdateLineHeight()
end

function UITabBarView:UpdateLineHeight( )
	self.gameObject.transform.anchorMin = Vector2(0.5, 1)
	self.gameObject.transform.anchorMax = Vector2(0.5, 1)
	self.gameObject.transform.pivot = Vector2(0.5, 1)
	local len = #self.tabbar_list
	local height = math_abs(self.parms.offsetY) + len * self.parms.spacing + 30
	-- SetAnchoredPosition(self.gameObject.transform, 0,0)--0.5,1的轴点的local不准确 还是用anchored
	if self.linebg_size_callback then
		new_height = height > 580 and 580 or height
		self.linebg_size_callback(self.parms.line_width,new_height,height)
	else
		SetLocalPositionX(self.gameObject.transform, self.parms.line_offsetX)
		self.gameObject.transform.sizeDelta = Vector2(self.parms.line_width, height)
	end
end

function UITabBarView:LoadTabBarPrefab()
	local vo = nil
	local item = nil
	local click_callback = function(index)
		self:SetTabBarIndex(index)
	end

	local item_len = #self.tabbar_list
	for i = 1,#self.tabbar_list do
		vo = self.tabbar_list[i]
		item = self.tabbar_item_list[i]
		if item == nil then
			item = UITabButton.New(self.parent_transform, nil, self.layer_name , self.view_style, self.tabbar_style, self.is_scroll)
			self.tabbar_item_list[i] = item
		end
		item:SetData(i, vo, click_callback, item_len, self.extra_arg_table)
	end

	for i=#self.tabbar_list + 1,#self.tabbar_item_list do
		self.tabbar_item_list[i]:SetVisible(false)
	end

	--延迟等所有的页签设置完再合批
	-- local function on_delay(  )
	-- 	self:DoBatch()
	-- end
	-- setTimeout(on_delay, 0.5)
end

function UITabBarView:DoBatch()
	-- if self.tabbar_style == 2 then
	-- 	do return end
	-- end
	if IsNull(self.parent_transform) then
		return
	end
	if not self.batch_cont then
		self.batch_cont = UiFactory.createChild(self.parent_transform, UIType.EmptyObject, "batch_cont")
	end
	if not self.batch_cont then return end
	for k,v in pairs(self.tabbar_item_list) do
		v:DoBatch(self.batch_cont.transform)
	end
	for k,v in pairs(self.tabbar_item_list) do
		if v.text_transform then
			v.text_transform:SetAsLastSibling()
		end
	end
	self.batch_cont.transform:SetAsLastSibling()
end


function UITabBarView:SetTabBarIndex(index,is_force,ignore_call_back)
	if self.curr_tabBtn_index == index and not is_force then
		return
	end
	local tab_btn 
	for k,v in pairs(self.tabbar_item_list) do
		if v.tab_id == self.curr_tabBtn_index then
			tab_btn = v
		end
	end

	if tab_btn then
		tab_btn:SetSelect(false)
	end
	self.curr_tabBtn_index = index
	local tab_btn 
	local pos_count = 0
	for k,v in pairsByKeys(self.tabbar_item_list) do
		pos_count = pos_count + 1
		if v.tab_id == self.curr_tabBtn_index then
			tab_btn = v
			break
		end
	end
	if tab_btn then
		tab_btn:SetSelect(true)
	end

	if self.gameObject then
		self.gameObject.transform:SetAsFirstSibling()
	end

	if not ignore_call_back and self.switch_callback then
		if not self.first_open_loaded and self.view_style == UITabWindow.SizeSmall then--防止页签过多 一开始看不到页签
			self.first_open_loaded = true
			local max_num = #self.tabbar_item_list
			if pos_count <= 6 then
				--前六个
				SetAnchoredPositionY(self.parent_transform, -48)
			else
				local show_left_pos = (pos_count-6)
				if pos_count == max_num then
					--最后一个
					show_left_pos = (pos_count-1)
				end
				show_left_pos = (show_left_pos+6) > max_num and (max_num-6) or show_left_pos
				SetAnchoredPositionY(self.parent_transform,show_left_pos * (self.parms.spacing+30))
			end
		end
		self.switch_callback(index)
	end
end

function UITabBarView:ClickTabItemHandler( id )
    if self.curr_tabBtn_index == id then return end 
    local tab_btn 
	for k,v in pairs(self.tabbar_item_list) do
		if v.tab_id == self.curr_tabBtn_index then
			tab_btn = v
		end
	end

	if tab_btn and tab_btn.transform then
		tab_btn:SetSelect(false)
	end
    self.curr_tabBtn_index = id 
    item = self:GetTabItem(id)
    if item ~= nil then 
        item:SetSelected(true)
    end

    local tab_btn 
	for k,v in pairs(self.tabbar_item_list) do
		if v.tab_id == self.curr_tabBtn_index then
			tab_btn = v
		end
	end
	if tab_btn and tab_btn.transform then
		-- print("HWR:UITabbarView [97]self.curr_tabBtn_index:,index ",self.curr_tabBtn_index,index)
		tab_btn:SetSelect(true)
	end

	if self.gameObject then
		self.gameObject.transform:SetAsFirstSibling()
	end
end

function UITabBarView:GetCurrentSelectIndex()
	return self.curr_tabBtn_index
end

function UITabBarView:ShowRedPoint(index,bool)
	for k,v in pairs(self.tabbar_item_list) do
		if index == v.tab_id then
			v:ShowRedPoint(bool)
			break
		end
	end
	-- local tab_btn = self.tabbar_item_list[index]
	-- if tab_btn then
	-- 	tab_btn:ShowRedPoint(bool)
	-- end
end

function UITabBarView:ShowRedPointWithNum(index, num, force_show)
	for k,v in pairs(self.tabbar_item_list) do
		if index == v.tab_id then
			v:ShowRedPointWithNum(num, force_show)
			break
		end
	end
end

function UITabBarView:SetSpeacialImg(index, state)
	for k,v in pairs(self.tabbar_item_list) do
		if index == v.tab_id then
			v:SetSpeacialImg(state)
			break
		end
	end
end

function UITabBarView:SetTextSize(font_size)
	for k,v in pairs(self.tabbar_item_list) do
		v:SetTextSize(font_size)
	end
end

function UITabBarView:GetTabbarBtn( index )
	local tab_btn = self.tabbar_item_list[index]
	return tab_btn
end

function UITabBarView:__delete()
	self.curr_tabBtn_index = 0

	for i,item in pairs(self.tabbar_item_list) do
		item:DeleteMe()
	end
	self.tabbar_item_list = {}
end

function UITabBarView:RefeshTabBar(  )
	self:LoadTabBarPrefab()
end

function UITabBarView:RefreshTabData( tabbar_list, switch_callback, tabbar_style )
	self.tabbar_list = tabbar_list or self.tabbar_list
	self.switch_callback = switch_callback or self.switch_callback
	self.tabbar_style = tabbar_style
	self.parms = UITabButton.Style[self.tabbar_style or 1] or UITabButton.Style[1]
	local vo = nil
	local item = nil
	local click_callback = function(index)
		self:SetTabBarIndex(index)
	end

	for k,v in pairs(self.tabbar_item_list) do
		v:SetVisible(false)
		-- 重置tab_id,避免隐藏掉的页签按钮跟某个存在的页签按钮id相同导致不能正常点亮
		v.tab_id = -1
	end

	local item_len = #self.tabbar_list
	for i = 1,#self.tabbar_list do
		vo = self.tabbar_list[i]
		item = self.tabbar_item_list[i]
		if item == nil then
			item = UITabButton.New(self.parent_transform, nil, self.layer_name , self.view_style, self.tabbar_style, self.is_scroll)
			self.tabbar_item_list[i] = item
		end
		item:SetVisible(true)
		item:SetData(i, vo, click_callback, item_len)
	end
	
	self:UpdateLineHeight()
	self:DoBatch()
end