local UIView = {}
local UIBaseView = {}
local EventSystem = require('Event/EventSystem')
local UIViewSettings = require('Common/UIViewSettings')
local UIScriptableCanvas = Tai.Lua.UIScriptableCanvas

local CSFunc_StartRepeatFunc = CSExt.CSFunc_StartRepeatFunc
local CSFunc_StopRepeatFunc = CSExt.CSFunc_StopRepeatFunc
local CSFunc_ResetRepeatFunc = CSExt.CSFunc_ResetRepeatFunc

local RegistTriggerEvent = CSExt.CSFunc_RegistTriggerEvent
local UnregistTriggerEvent = CSExt.CSFunc_UnregistTriggerEvent
local PlayUIAnimation = CSExt.CSFunc_PlayUIAnimation
local StopUIAnimation = CSExt.CSFunc_StopUIAnimation
local PauseUIAnimation = CSExt.CSFunc_PauseUIAnimation
local ResumeUIAnimation = CSExt.CSFunc_ResumeUIAnimation
local ScaleToSize = CSExt.CSFunc_ScaleToSize
local MoveToPos = CSExt.CSFunc_MoveToPos
local InstantiateCollection = CSExt.CSFunc_InstantiateCollection
local DestroyCollection = CSExt.CSFunc_DestroyCollection
local RegistDropEvent = CSExt.CSFunc_RegistDropEvent
local RemoveTargetDropEvent = CSExt.CSFunc_RemoveTargetDropEvent
local InstantiateCellCollection = CSExt.CSFunc_InstantiateCellCollection
local InitUITemplate = CSExt.CSFunc_InitUITemplate
local InitCellUITemplate = CSExt.CSFunc_InitCellUITemplate
local SetSortingLayer = CSExt.CSFunc_SetSortingLayer

local HierarchyFunctionCalls = {}
local HierarchyBorderFunc = {}

local rawget = rawget

local function CallFunctionHierarchy(viewSelf, funcName, ...)
	--此方法可能出现递归调用，造成调用栈被污染，使用一个边界标记变量来分隔每一个函数的调用栈
	table.insert(HierarchyFunctionCalls, HierarchyBorderFunc)
	local viewType = viewSelf.__viewType
	while viewType do
		local func = rawget(viewType, funcName)
		if func then
			table.insert(HierarchyFunctionCalls, func)
		end
		viewType = viewType.BaseViewType
	end
	--每次只遍历到边界就停止，剩下的是其它函数的调用栈
	local func = table.remove(HierarchyFunctionCalls)
	while func ~= HierarchyBorderFunc do
		func(viewSelf, ...)
		func = table.remove(HierarchyFunctionCalls)
	end
end

local UIEventTriggerType = {
	PointerEnter = 0,
	PointerExit = 1,
	PointerDown = 2,
	PointerUp = 3,
	PointerClick = 4,
	Drag = 5,
	Drop = 6,
	Scroll = 7,
	UpdateSelected = 8,
	Select = 9,
	Deselect = 10,
	Move = 11,
	InitializePotentialDrag = 12,
	BeginDrag = 13,
	EndDrag = 14,
	Submit = 15,
	Cancel = 16,
}

local OnEventTriggerHandlerName = {}
for eventName, eventIndex in pairs(UIEventTriggerType) do
	OnEventTriggerHandlerName[eventIndex] = "On"..eventName
end

local OnLoopScrollEventTriggerHandlerName = {}
for eventName, eventIndex in pairs(UIEventTriggerType) do
	OnLoopScrollEventTriggerHandlerName[eventIndex] = "Cell_On"..eventName
end

--所有用于与C#之间通信的调用函数定义
local ViewEntryType = {
	OnCreated = 1,
	OnOpened = 2,
	OnClosed = 3,
	OnFocusChanged = 4,
	OnUIAnimationStoped = 5,
	OnButtonClicked = 6,
	OnValueChanged = 7,
	OnEndEdit = 8,
	OnEventTrigger = 9,
	OnLoopScrollEvent = 10,
	OnLoopScrollEventTrigger = 11,
	OnBackButtonPressed = 13,

	OnRepeatFunc = 20,
	
	InvokeEntryTypeStart = 30,
	GetViewClassName = 31,

	LSEvent_OnScrollTop = 1,
	LSEvent_OnScrollBottom = 2,
	LSEvent_OnCellInit = 3,
	LSEvent_OnCellSelect = 4,
	LSEvent_OnCellClicked = 5,
	LSEvent_OnCellMoveCenter = 6,
	LSEvent_OnCellValueChanged = 7,
	LSEvent_OnCellDispose = 8,
}

local ViewEntryFuncImpl = {
	[ViewEntryType.OnCreated] = function(self)
		CallFunctionHierarchy(self, "OnCreated")
	end,
	
	[ViewEntryType.OnOpened] = function(self, context)
		CallFunctionHierarchy(self, "OnOpened", context)
	end,
	
	[ViewEntryType.OnBackButtonPressed] = function(self)
		local viewFunc = self.OnBackButtonPressed
		if viewFunc then
			viewFunc(self)
		end
	end,

	[ViewEntryType.OnClosed] = function(self)
		CallFunctionHierarchy(self, "OnClosed")
	end,
	
	[ViewEntryType.OnFocusChanged] = function(self, value)
		EventSystem.Dispatch(EventID.UI_Guide_OnViewFocus, self.__viewClassPath, value)
		CallFunctionHierarchy(self, "OnFocusChanged", value)
	end,
	
	[ViewEntryType.OnUIAnimationStoped] = function(self, playingID)
		local viewFunc = self.OnUIAnimationStoped
		if viewFunc then
			viewFunc(self, playingID)
		end
	end,
	
	[ViewEntryType.OnButtonClicked] = function(self, comp)
		local viewFunc = self.OnButtonClicked
		if viewFunc then
			viewFunc(self, comp)
		end
	end,
	
	[ViewEntryType.OnValueChanged] = function(self, comp, value)
		local viewFunc = self.OnValueChanged
		if viewFunc then
			viewFunc(self, comp, value)
		end
	end,
	
	[ViewEntryType.OnEndEdit] = function(self, comp, value)
		local viewFunc = self.OnEndEdit
		if viewFunc then
			viewFunc(self, comp, value)
		end
	end,
	
	[ViewEntryType.OnEventTrigger] = function(self, eventType, eventComponent, eventData)
		local funcName = OnEventTriggerHandlerName[eventType]
		if funcName then
			local viewFunc = self[funcName]
			if viewFunc then
				viewFunc(self, eventComponent, eventData)
			else
				logging.error(LTAG.ERROR, 'view event trigger function not found:', funcName, eventComponent)
			end
		else
			logging.error(LTAG.ERROR, 'view event trigger type not found:', eventType, eventComponent)
		end
	end,
		
	[ViewEntryType.OnLoopScrollEvent] = function(self, lsEventType, ...)
		local viewFunc = nil
		if lsEventType == ViewEntryType.LSEvent_OnScrollTop then
			viewFunc = self.OnScrollTop
		elseif lsEventType == ViewEntryType.LSEvent_OnScrollBottom then
			viewFunc = self.OnScrollBottom
		elseif lsEventType == ViewEntryType.LSEvent_OnCellInit then
			viewFunc = self.OnCellInit
		elseif lsEventType == ViewEntryType.LSEvent_OnCellSelect then
			viewFunc = self.OnCellSelect
		elseif lsEventType == ViewEntryType.LSEvent_OnCellMoveCenter then
			viewFunc = self.OnCellMoveCenter
		elseif lsEventType == ViewEntryType.LSEvent_OnCellClicked then
			viewFunc = self.OnCellClicked
		elseif lsEventType == ViewEntryType.LSEvent_OnCellValueChanged then
			viewFunc = self.OnCellValueChanged
		elseif lsEventType == ViewEntryType.LSEvent_OnCellDispose then
			viewFunc = self.OnCellDispose
		else
			logging.error(LTAG.ERROR, 'loop scroll entry function event type not found:', lsEventType, ...)
		end
		
		if viewFunc then
			viewFunc(self, ...)
		end
	end,

	[ViewEntryType.OnLoopScrollEventTrigger] = function(self, eventType, comp, index, eventComponent, eventData)
		local funcName = OnLoopScrollEventTriggerHandlerName[eventType]
		if funcName then
			local viewFunc = self[funcName]
			if viewFunc then
				viewFunc(self, comp, index, eventComponent, eventData)
			else
				logging.error(LTAG.ERROR, 'loop scroll event trigger function not found:', funcName, comp, index, eventComponent)
			end
		else
			logging.error(LTAG.ERROR, 'loop scroll event trigger type not found:', eventType, comp, index, eventComponent)
		end
	end,
	
	[ViewEntryType.OnRepeatFunc] = function(self, repeatId, ...)
		local viewFunc =  self.__repeatFunc[repeatId]
		if viewFunc then
			viewFunc(self, ...)
		else
			logging.error(LTAG.ERROR, 'view repeat func not found')
		end
	end,

	[ViewEntryType.GetViewClassName] = function(self)
		return self.__viewClassPath
	end
}

--界面提供给C#的入口函数
local function ViewEntryFunc(self, funcType, ...)
	local entryFunc = ViewEntryFuncImpl[funcType]
	if entryFunc then
		if funcType > ViewEntryType.InvokeEntryTypeStart then
			return entryFunc(self, ...)
		else
			entryFunc(self, ...)
		end
	else
		logging.error(LTAG.ERROR, 'view entry function type not found:', funcType, ...)
	end
end

--UIView Interface
function UIBaseView:OnOpened(context)
	self.context = context
	-- 资源条统一处理
	if CTL and CTL.Currency then
		CTL.Currency.OpenCurrencyPanel(self.__viewClassPath, self.currency_Info)
	end
	if DEF.USE_BATCH_MODE then
		BatchAgent.RegisterBatchUIEvent(self.__viewClassPath, self)
	end
	-- 打脸功能设置当前显示跳过状态
	if CTL and CTL.PushInterface then
		CTL.PushInterface.ShowPushInterface(self.__viewClassPath, self.toggle_Skip)
	end
	EventSystem.Dispatch(EventID.UI_OnViewOpened, self.__viewClassPath)
	UIViewSettings.OnViewOpened(self)
end


function UIBaseView:OnBackButtonPressed()
	UIViewSettings.OnBackButtonPressed(self)
end


function UIBaseView:OnClosed()
	self:UnregistSystemEvent()
	self:UnregistTriggerEvent()
	self.__repeatFunc = nil
	if DEF.USE_BATCH_MODE then
		BatchAgent.UnRegisterBatchUIEvent(self.__viewClassPath, self)
	end
	EventSystem.Dispatch(EventID.UI_OnViewClosed, self.__viewClassPath)
	UIViewSettings.OnViewClosed(self)
end

function UIBaseView:RegistSystemEvent(eventId, func)
	self.__systemEventEntry = self.__systemEventEntry or {}
	table.insert(self.__systemEventEntry, {eventId, func, self})
	EventSystem.Regist(eventId, func, self)
end

function UIBaseView:UnregistSystemEvent()
	if self.__systemEventEntry then
		for _, evt in ipairs(self.__systemEventEntry) do
			EventSystem.UnRegist(evt[1], evt[2], evt[3])
		end
		self.__systemEventEntry = nil
	end
end

function UIBaseView:StartRepeatFunc(repeatFunc, interval, repeatCount, isUpdate, useRealTimeUpdate)
	if interval < 0 then
		logging.error(LTAG.ERROR, "view repeat function interval invalid!")
		return
	end
	
	if repeatCount == nil then
		repeatCount = 0
	end

    if isUpdate == nil then
        isUpdate = true
    end
    if useRealTimeUpdate == nil then
        useRealTimeUpdate = true
    end

    if self.__repeatFunc == nil then
        local repeatId = CSFunc_StartRepeatFunc(self, interval, repeatCount, isUpdate, useRealTimeUpdate)
		--构建一个双向索引，在Lua中使用func作为键，在C#中使用id作为键
        self.__repeatFunc = {
            [repeatFunc] = repeatId,
            [repeatId] = repeatFunc,
        }
    else
        local repeatId = self.__repeatFunc[repeatFunc]
        if repeatId then
			CSFunc_StopRepeatFunc(self, repeatId)
			self.__repeatFunc[repeatId] = nil
			self.__repeatFunc[repeatFunc] = nil
        end
        repeatId = CSFunc_StartRepeatFunc(self, interval, repeatCount, isUpdate, useRealTimeUpdate)
        self.__repeatFunc[repeatFunc] = repeatId
		self.__repeatFunc[repeatId] = repeatFunc
    end
end

function UIBaseView:StopRepeatFunc(repeatFunc)
	if self.__repeatFunc then
		local repeatId = self.__repeatFunc[repeatFunc]
		if repeatId then
			CSFunc_StopRepeatFunc(self, repeatId)
			self.__repeatFunc[repeatId] = nil
			self.__repeatFunc[repeatFunc] = nil
		end
	end
end

function UIBaseView:ResetRepeatFunc(repeatFunc, startAtTime)
	if self.__repeatFunc then
		local repeatId = self.__repeatFunc[repeatFunc]
		if repeatId then
			CSFunc_ResetRepeatFunc(self, repeatId, startAtTime or 0)
		end
	end
end

function UIBaseView:PlayUIAnimation(...)
	return PlayUIAnimation(self, ...)
end

function UIBaseView:StopUIAnimation(id, dispose, stopAtEnd, resetAfterStop)
	StopUIAnimation(self, id, dispose or false, stopAtEnd or false, resetAfterStop or false)
end

function UIBaseView:PauseUIAnimation(id)
	PauseUIAnimation(self, id)
end

function UIBaseView:ResumeUIAnimation(id)
	ResumeUIAnimation(self, id)
end

function UIBaseView:ScaleToSize(...)
	return ScaleToSize(self, ...)
end

function UIBaseView:MoveToPos(...)
	return MoveToPos(self, ...)
end

--用于给界面动态添加对象，需要一个Array类型的Collection并指定源对象，创建成功后返回生成的新对象
function UIBaseView:InstantiateCollection(parentCollection, sourceObj)
	local newCol = {}
	table.insert(parentCollection, newCol)
	InstantiateCollection(self, sourceObj, newCol, parentCollection.gameObject)
	return newCol
end

--移除一个Array类型Collection中的元素，界面关闭时所有动态创建的对象会一并销毁，没有特殊需求时不需要手动调用
function UIBaseView:DestroyCollection(parentCollection, index)
	table.remove(parentCollection, index)
	DestroyCollection(self, index - 1, parentCollection.gameObject)
end

--用于给界面动态添加对象，需要一个Array类型的Collection并指定源对象，创建成功后返回生成的新对象
function UIBaseView:InstantiateCellCollection(cellGameObject, parentCollection, sourceObj)
	local newCol = {}
	table.insert(parentCollection, newCol)
	InstantiateCellCollection(cellGameObject, sourceObj, newCol, parentCollection.gameObject)
	return newCol
end

-- 用于给界面动态初始化Template，初始化之前template节点是{gameObject = XXX}，初始化后为具体的table
function UIBaseView:InitUITemplate(uiTemplateTable, parentColTable)
	if parentColTable then
		InitUITemplate(self, uiTemplateTable, parentColTable)
	else
		InitUITemplate(self, uiTemplateTable)
	end
end

-- 用于给Cell动态初始化Template，初始化之前template节点是{gameObject = XXX}，初始化后为具体的table
function UIBaseView:InitCellUITemplate(cellGameObject, uiTemplateTable, parentColTable)
	if parentColTable then
		InitCellUITemplate(cellGameObject, uiTemplateTable, parentColTable)
	else
		InitCellUITemplate(cellGameObject, uiTemplateTable)
	end
end

function UIBaseView:CloseView(isRecoveryView)
	UIScriptableCanvas.ExecuteCloseViewEvent(self.gameObject, isRecoveryView or false)
end

function UIBaseView:RegistTriggerEvent(comp, eventType)
	self.__triggerEventEntry = self.__triggerEventEntry or {}
	self.__triggerEventEntry[comp] = true
	RegistTriggerEvent(self, comp, eventType, true)
end

function UIBaseView:UnregistTriggerEvent(comp)
	if self.__triggerEventEntry then
		if comp then
			if self.__triggerEventEntry[comp] then
				UnregistTriggerEvent(self, comp)
				self.__triggerEventEntry[comp] = nil
			end
		else
			for compTemp in pairs(self.__triggerEventEntry) do
				if compTemp then
					UnregistTriggerEvent(self, compTemp)
				end
			end	
			self.__triggerEventEntry = nil
		end
	end
end

function UIBaseView:RegistDropEvent(comp,list)
	RegistDropEvent(self,comp,list)
end

function UIBaseView:RemoveTargetDropEvent(comp)
	RemoveTargetDropEvent(self,comp)
end

function UIBaseView:SetPushStyle(style)
	self.context = self.context or {}
	self.context.__pushStyle = style
end

function UIBaseView:OnCloseAndRecoverView(viewClassPath)
	if viewClassPath == self.__viewClassPath then
        self:CloseView(true)
    end
end

--当overWrite为false时 后面参数无意义
function UIBaseView:SetSortingLayer(overWrite, layerName, order)
	if GameAppInfo.IsVersionGreaterThan18000() then
		SetSortingLayer(self, overWrite, layerName, order)
	else
		local viewCanvas = self.gameObject:GetComponent(typeof(UnityEngine.Canvas))
		if viewCanvas then
			if overWrite then
				viewCanvas.overrideSorting = true
				viewCanvas.sortingLayerName = layerName
				viewCanvas.sortingOrder = order
			else
				viewCanvas.overrideSorting = false
			end
		end
	end
end

local ViewMT =
{
	__index = function(t, k)
		local v = rawget(t, k)
		if v == nil then
			local viewType = rawget(t, '__viewType')
			v = rawget(viewType, k)
			while v == nil do
				viewType = rawget(viewType, 'BaseViewType')
				if viewType then
					v = rawget(viewType, k)
				else
					break
				end
			end
		end
		return v
	end
}

local function CreateViewClass(baseType, classPath)
	local CreateViewObject = function(viewType, viewCanvas)
		local viewObj = {
			__viewType = viewType,
			__viewCanvas = viewCanvas,
			__viewClassPath = viewType.ViewClassPath,
		}
		return setmetatable(viewObj, ViewMT)
	end
	local viewType = {
		BaseViewType = baseType or UIBaseView,
		ViewClassPath = classPath,
		CreateViewObject = CreateViewObject,
	}
	return viewType
end

local function GetViewClass(classPath)
	--TODO 优化此处以减少字符串拼接的消耗，可考虑将运行过程中所有定义过的类型存储起来，提供快速查询获取接口
    local viewClass = require('View/'..classPath)
    viewClass.ViewClassPath = classPath
    return viewClass
end

return {
	CreateViewClass = CreateViewClass,
	GetViewClass = GetViewClass,
	ViewEntryFunc = ViewEntryFunc,
	UIEventTriggerType = UIEventTriggerType,
}