-- Written by Kip Turner, Copyright Roblox 2015
local CoreGui = game:GetService("CoreGui")
local GuiService = game:GetService('GuiService')
local RunService = game:GetService("RunService")

local GuiRoot = CoreGui:FindFirstChild("RobloxGui")
local Modules = GuiRoot:FindFirstChild("Modules")
local ShellModules = Modules:FindFirstChild("Shell")

local Utility = require(ShellModules:FindFirstChild('Utility'))
local GlobalSettings = require(ShellModules:FindFirstChild('GlobalSettings'))
local EventHub = require(ShellModules:FindFirstChild('EventHub'))
local FriendsData = require(ShellModules:FindFirstChild('FriendsData'))
local FriendsView = require(ShellModules:FindFirstChild('FriendsView'))
local ScrollingGridModule = require(ShellModules:FindFirstChild('ScrollingGrid'))
local GameSort = require(ShellModules:FindFirstChild('GameSort'))
local ScreenManager = require(ShellModules:FindFirstChild('ScreenManager'))
local SoundManager = require(ShellModules:FindFirstChild('SoundManager'))
local AssetManager = require(ShellModules:FindFirstChild('AssetManager'))
local LoadingWidget = require(ShellModules:FindFirstChild('LoadingWidget'))
local Strings = require(ShellModules:FindFirstChild('LocalizedStrings'))
local ThumbnailLoader = require(ShellModules:FindFirstChild('ThumbnailLoader'))
local SortsData = require(ShellModules:FindFirstChild('SortsData'))
local Analytics = require(ShellModules:FindFirstChild('Analytics'))
local XboxAppState = require(ShellModules:FindFirstChild('AppState'))
local XboxRecommendedPeople = settings():GetFFlag("XboxRecommendedPeople2")

local MOCKUP_SIZE = Vector2.new(1920, 1080)
local PROFILE_SIZE = Vector2.new(450, 343)
local PROFILE_NAME_SIZE = Vector2.new(450, 38)
local PROFILE_BUTTON_SIZE = Vector2.new(450, 300)
local PROFILE_IMAGE_SIZE = Vector2.new(450, 300)
local SORTS_SIZE = Vector2.new(1234, 608)

local function CreateHomePane(parent)
	local this = {}

	local inFocus = false

	local sortsObjects = {}


	local HomePaneContainer = Utility.Create'Frame'
	{
		Name = 'HomePane';
		Size = UDim2.new(1, 0, 1, 0);
		BackgroundTransparency = 1;
		Parent = parent;
	}

	local ProfileContainer = Utility.Create'Frame'
	{
		Name = 'ProfileContainer';
		Position = UDim2.new(0,0,0,0);
		BackgroundTransparency = 1;
		Parent = HomePaneContainer;
	}

	local NameLabel = Utility.Create'TextLabel'
	{
		Name = 'NameLabel';
		Text = '';
		TextXAlignment = 'Left';
		TextYAlignment = 'Top';
		-- TextScaled = true;
		TextColor3 = GlobalSettings.WhiteTextColor;
		Font = GlobalSettings.RegularFont;
		FontSize = GlobalSettings.SubHeaderSize;
		BackgroundTransparency = 1;
		Parent = ProfileContainer;
	};
	local ProfileButton = Utility.Create'ImageButton'
	{
		Name = 'ProfileButton';
		AutoButtonColor = false;
		BackgroundTransparency = 1;
		Parent = ProfileContainer;

		SoundManager:CreateSound('MoveSelection');
	}
	local ProfileImage = Utility.Create'ImageLabel'
	{
		Name = 'ProfileImage';
		Position = UDim2.new(0,0,0,0);
		BackgroundTransparency = 1;
		BorderSizePixel = 0;
		ZIndex = 3;
		Parent = ProfileButton;
	};
	Utility.Create'Frame'
	{
		Name = 'ProfileImageBackground';
		Size = UDim2.new(1,0,1,0);
		BorderSizePixel = 0;
		BackgroundTransparency = 0;
		BackgroundColor3 = GlobalSettings.CharacterBackgroundColor;
		ZIndex = 2;
		Parent = ProfileImage;
		AssetManager.CreateShadow(1);
	}
	local AvatarBrushBackground = Utility.Create'Frame'
	{
		Name = 'AvatarBrushImage';
		BorderSizePixel = 0;
		BackgroundColor3 = GlobalSettings.AvatarBoxBackgroundColor;
		BackgroundTransparency = GlobalSettings.AvatarBoxBackgroundDeselectedTransparency;
		ZIndex = 2;
		-- Parent = ProfileButton;
	}
	local AvatarBrushImage = Utility.Create'ImageLabel'
	{
		Name = 'AvatarBrushImage';
		BorderSizePixel = 0;
		BackgroundTransparency = 1;
		ZIndex = 2;
		Parent = AvatarBrushBackground;
		Image = "rbxasset://textures/ui/Shell/Icons/CustomizeIcon@1080.png";
		Size = UDim2.new(0,47,0,48);
	};
	local AvatarTextLabel = Utility.Create'TextLabel'
	{
		Name = 'AvatarTextLabel';
		Text = Strings:LocalizedString('EditAvatarPhrase');
		TextColor3 = GlobalSettings.WhiteTextColor;
		Font = GlobalSettings.RegularFont;
		FontSize = GlobalSettings.ButtonSize;
		BackgroundTransparency = 1;
		ZIndex = 2;
		Parent = AvatarBrushBackground;
	};

	ProfileButton.MouseButton1Click:connect(function()
		SoundManager:Play('ButtonPress')
		EventHub:dispatchEvent(EventHub.Notifications["NavigateToEquippedAvatar"])
		-- EventHub:dispatchEvent(EventHub.Notifications["OpenProfileDetail"], "AppHub");
	end)

	local function OnProfileButtonSelectionChanged()
		local selectedObject = GuiService.SelectedCoreObject
		local newBackgroundTransparency = selectedObject == ProfileButton and
			GlobalSettings.AvatarBoxBackgroundSelectedTransparency or
			GlobalSettings.AvatarBoxBackgroundDeselectedTransparency
		local newTextTransparency = selectedObject == ProfileButton and
			GlobalSettings.AvatarBoxTextSelectedTransparency or
			GlobalSettings.AvatarBoxTextDeselectedTransparency

		Utility.PropertyTweener(AvatarBrushBackground, 'BackgroundTransparency', newBackgroundTransparency, newBackgroundTransparency, 0, nil, true)
		Utility.PropertyTweener(AvatarTextLabel, 'TextTransparency', newTextTransparency, newTextTransparency, 0, nil, true)
		Utility.PropertyTweener(AvatarBrushImage, 'ImageTransparency', newTextTransparency, newTextTransparency, 0, nil, true)
	end

	local existingThumbnailLoader = nil
	local function UpdateProfileInfo()
		local playerName = XboxAppState.store:getState().XboxUser.gamertag
		NameLabel.Text = playerName and playerName or ''

		local rbxuid = XboxAppState.store:getState().RobloxUser.rbxuid

		if rbxuid then
			if existingThumbnailLoader then
				existingThumbnailLoader:Cancel()
			end
			local thumbnailSize = ThumbnailLoader.AvatarSizes.Size352x352
			local thumbLoader = ThumbnailLoader:LoadAvatarThumbnailAsync(ProfileImage, rbxuid,
				Enum.ThumbnailType.AvatarThumbnail, Enum.ThumbnailSize.Size352x352, true)
			existingThumbnailLoader = thumbLoader
			spawn(function()
				thumbLoader:LoadAsync()
				ProfileImage.ImageRectSize = Vector2.new(thumbnailSize.X, (PROFILE_IMAGE_SIZE.Y/PROFILE_IMAGE_SIZE.X) * thumbnailSize.X)
			end)
		end
	end
	UpdateProfileInfo()

	local FriendActivityContainer = Utility.Create'Frame'
	{
		Name = 'FriendActivityContainer';
		BackgroundTransparency = 1;
		Parent = HomePaneContainer;
	}
	local FriendActivityTitle = Utility.Create'TextLabel'
	{
		Name = 'FriendActivityTitle';
		Text = Strings:LocalizedString('FriendActivityWord');
		Size = UDim2.new(1,0,0,50);
		Position = UDim2.new(0,0,0,10);
		TextXAlignment = 'Left';
		TextColor3 = GlobalSettings.WhiteTextColor;
		Font = GlobalSettings.RegularFont;
		FontSize = GlobalSettings.SubHeaderSize;
		BackgroundTransparency = 1;
		Parent = FriendActivityContainer;
	};

	local NoFriendsOnlineMessage = Utility.Create'TextLabel'
	{
		Name = 'NoFriendsOnlineMessage';
		Text = Strings:LocalizedString('NoFriendsOnlinePhrase');
		Size = UDim2.new(0.9,0,1,-125);
		Position = UDim2.new(0.05, 0, 0, 125);
		TextYAlignment = 'Top';
		TextColor3 = GlobalSettings.GreyTextColor;
		TextWrapped = true;
		TextTransparency = GlobalSettings.FriendStatusTextTransparency;
		Font = GlobalSettings.BoldFont;
		FontSize = GlobalSettings.DescriptionSize;
		BackgroundTransparency = 1;
		Visible = false;
		Parent = FriendActivityContainer;
	};

	local friendsScroller = ScrollingGridModule({SelectionMode = "Middle"; Dynamic = true})
	friendsScroller:SetSize(UDim2.new(1,0,1,-60))
	friendsScroller:SetRowColumnConstraint(1)
	friendsScroller:SetScrollDirection(friendsScroller.Enum.ScrollDirection.Vertical)
	friendsScroller:SetCellSize(Vector2.new(446,114))
	friendsScroller:SetSpacing(Vector2.new(0, 26))
	friendsScroller:SetPosition(UDim2.new(0,0,0,FriendActivityTitle.Position.Y.Offset + FriendActivityTitle.Size.Y.Offset))
	local friendScrollerContainer = friendsScroller:GetGuiObject()
	friendScrollerContainer.Visible = false
	friendsScroller:SetParent(FriendActivityContainer)

	local function onFriendsUpdated(friendCount)
		NoFriendsOnlineMessage.Visible = friendCount == 0
		friendScrollerContainer.Visible = friendCount > 0
	end

	local function setFriendItems()
		local friendsData = FriendsData.GetOnlineFriendsAsync()
		FriendsView(friendsScroller, friendsData, nil, onFriendsUpdated)
		onFriendsUpdated(#friendsData)
	end

	local friendsLoader = LoadingWidget(
		{ Parent = FriendActivityContainer }, { setFriendItems } )

	-- Don't Block
	spawn(function()
		friendsLoader:AwaitFinished()
		friendsLoader:Cleanup()
	end)

	local SortsContainer = Utility.Create'Frame'
	{
		Name = 'SortsContainer';
		BackgroundTransparency = 1;
		Parent = HomePaneContainer;
	}

	local populateSortsDebounce = false
	local function PopulateSorts()
		if populateSortsDebounce then return end
		populateSortsDebounce = true
		local function loadGameSorts()
			while #sortsObjects > 0 do
				local sortObject = table.remove(sortsObjects)
				if sortObject then
					if GuiService.SelectedCoreObject and GuiService.SelectedCoreObject:IsDescendantOf(sortObject:GetContainer()) then
						if inFocus then
							Utility.SetSelectedCoreObject(this:GetDefaultSelectionObject())
						end
					end
					sortObject:Destroy()
				end
			end

			local favoriteGamesSort = SortsData:GetUserFavorites()
			local favoritesPage1 = favoriteGamesSort:GetSortAsync(0, 4)

			local recentGamesSort = SortsData:GetUserRecent()
			local recentlyPage1 = recentGamesSort:GetSortAsync(0, 4)

			local showRecent = recentlyPage1 and #recentlyPage1 > 2
			local showFavorites = favoritesPage1 and #favoritesPage1 > 2

			local function setGridView(view, page, title, collection)
				if page then
					view:SetPlaceIds(page, title, collection)
				end
				view:SetTitle(title)
				view:SetVisible(false)
				view:SetParent(SortsContainer)
				table.insert(sortsObjects, view)
			end

			local function createMainSortGrid(title, page, collection)
				local view = GameSort:CreateMainGridView(UDim2.new(0, 378, 1, 0), Vector2.new(10, 10),
					UDim2.new(1, 0, 0, 378), UDim2.new(0, 184, 0, 184))
				setGridView(view, page, title, collection)

				return view
			end
			local function createGridSortView(size, imageSize, spacing, rows, columns, page, title, collection)
				local view = GameSort:CreateGridView(size, imageSize, spacing, rows, columns)
				setGridView(view, page, title, collection)

				return view
			end

			local currentPosition = UDim2.new(0, 0, 0, 0)
			local margin = (showFavorites and showRecent) and 50 or 28

			if showFavorites then
				local view = createMainSortGrid(Strings:LocalizedString('FavoritesSortTitle'), favoritesPage1, favoriteGamesSort)
				view:SetPosition(currentPosition)
				currentPosition = currentPosition + UDim2.new(0, view:GetContainer().Size.X.Offset + margin, 0, 0)
			end
			if showRecent then
				local view = createMainSortGrid(Strings:LocalizedString('RecentlyPlayedSortTitle'), recentlyPage1, recentGamesSort)
				view:SetPosition(currentPosition)
				currentPosition = currentPosition + UDim2.new(0, view:GetContainer().Size.X.Offset + margin, 0, 0)
			end

			local featuredGamesSort = SortsData:GetSort(SortsData.DefaultSortId.Featured)
			if featuredGamesSort then
				--Currently, assume SortsData.DefaultSortId.Featured corresponds to the feature sort Id
				local featuredTitle = Strings:LocalizedString('FeaturedTitle')
				local recommendedView;
				if showRecent and showFavorites then
					local page = featuredGamesSort:GetSortAsync(0, 4)
					recommendedView = createMainSortGrid(featuredTitle, page, featuredGamesSort)
				elseif showRecent or showFavorites then
					local page = featuredGamesSort:GetSortAsync(0, 7)
					recommendedView = createGridSortView(UDim2.new(0, 858, 1, 0), UDim2.new(0, 276, 0, 276), Vector2.new(15, 20),
						2, 3, page, featuredTitle, featuredGamesSort)
				else
					local page = featuredGamesSort:GetSortAsync(0, 9)
					recommendedView = createGridSortView(UDim2.new(0, 1236, 0, 648), UDim2.new(0, 300, 0, 300), Vector2.new(12, 12),
						2, 4, page, featuredTitle, featuredGamesSort)
				end
				recommendedView:SetPosition(currentPosition)
			end
		end
		local loader = LoadingWidget(
			{Parent = SortsContainer}, {loadGameSorts})
		spawn(function()
			loader:AwaitFinished()
			loader:Cleanup()
			loader = nil
			populateSortsDebounce = false
			for i = 1, #sortsObjects do
				sortsObjects[i]:SetVisible(true)
			end
		end)
	end

	local function UpdateLayout()
		local guiRootSize = GuiRoot.AbsoluteSize
		ProfileContainer.Size = Utility.CalculateRelativeDimensions(ProfileContainer, PROFILE_SIZE, MOCKUP_SIZE, guiRootSize)

		NameLabel.Size = Utility.CalculateRelativeDimensions(NameLabel, PROFILE_NAME_SIZE, MOCKUP_SIZE, guiRootSize)

		ProfileButton.Size = Utility.CalculateRelativeDimensions(ProfileButton, PROFILE_BUTTON_SIZE, MOCKUP_SIZE, guiRootSize)
		ProfileButton.AnchorPoint = Vector2.new(0, 1)
		ProfileButton.Position = UDim2.new(0, 0, 1, -6)


		ProfileImage.Size = Utility.CalculateRelativeDimensions(ProfileImage, PROFILE_IMAGE_SIZE, MOCKUP_SIZE, guiRootSize)
		AvatarBrushBackground.Size = UDim2.new(1 - ProfileImage.Size.X.Scale, -ProfileImage.Size.X.Offset, 1, 0)
		AvatarBrushBackground.Position = UDim2.new(1 - AvatarBrushBackground.Size.X.Scale, AvatarBrushBackground.Size.X.Offset, 0, 0)

		AvatarBrushImage.AnchorPoint = Vector2.new(0.5, 0.5)
		AvatarBrushImage.Position = UDim2.new(0.5, 0, 0.42, 0)

		AvatarTextLabel.AnchorPoint = Vector2.new(0.5, 0.5)
		AvatarTextLabel.Position = UDim2.new(0.5, 0, 0.7, 0)


		FriendActivityContainer.Size = UDim2.new(ProfileContainer.Size.X.Scale, 0, 0, 300);
		FriendActivityContainer.Position = UDim2.new(0,0,ProfileContainer.Size.Y.Scale,0);

		SortsContainer.Size = Utility.CalculateRelativeDimensions(SortsContainer, SORTS_SIZE, MOCKUP_SIZE, guiRootSize)
		SortsContainer.Position = UDim2.new(1 - SortsContainer.Size.X.Scale, 0, 0, 0)
	end

	UpdateLayout()

	local screenResolutionChangedConn = nil
	local profileButtonSelectedConn = nil
	local profileButtonDeselectedConn = nil

	function this:GetName()
		return Strings:LocalizedString('HomeWord')
	end

	function this:GetAnalyticsInfo()
		return {[Analytics.WidgetNames('WidgetId')] = Analytics.WidgetNames('HomePaneId')}
	end

	function this:IsFocused()
		return inFocus
	end

	function this:GetDefaultSelectionObject()
		return ProfileButton
	end

	function this:SetSelectionObject()
		Utility.SetSelectedCoreObject(self:GetDefaultSelectionObject())
		-- TODO: Remember selection while staying in Pane. Pressing A on the Home tab should remember
		-- last selection only while in pane.
	end

	function this:Show(fromAppHub)
		HomePaneContainer.Visible = true
		PopulateSorts()
		UpdateLayout()

		Utility.DisconnectEvent(screenResolutionChangedConn)
		screenResolutionChangedConn = GuiRoot:GetPropertyChangedSignal('AbsoluteSize'):connect(function()
			RunService.RenderStepped:wait()
			UpdateLayout()
		end)

		Utility.DisconnectEvent(profileButtonSelectedConn)
		Utility.DisconnectEvent(profileButtonDeselectedConn)
		profileButtonSelectedConn = ProfileButton.SelectionGained:connect(OnProfileButtonSelectionChanged)
		profileButtonDeselectedConn = ProfileButton.SelectionLost:connect(OnProfileButtonSelectionChanged)
		OnProfileButtonSelectionChanged()
		UpdateProfileInfo()

		ScreenManager:DefaultCancelFade(self.TransitionTweens)
		self.TransitionTweens = ScreenManager:DefaultFadeIn(HomePaneContainer)
		delay(0.5, function()
			if inFocus and GuiService.SelectedCoreObject == nil then
				self:SetSelectionObject()
			end
		end)

		if XboxRecommendedPeople then
			--Suspend Friends BG Update whenever we are on GamesPane
			FriendsData:SuspendUpdate()
		end
		ScreenManager:PlayDefaultOpenSound()
	end

	function this:Hide(fromAppHub)
		HomePaneContainer.Visible = false

		profileButtonSelectedConn = Utility.DisconnectEvent(profileButtonSelectedConn)
		profileButtonDeselectedConn = Utility.DisconnectEvent(profileButtonDeselectedConn)
		screenResolutionChangedConn = Utility.DisconnectEvent(screenResolutionChangedConn)

		ScreenManager:DefaultCancelFade(self.TransitionTweens)
		self.TransitionTweens = nil

		if XboxRecommendedPeople then
			if fromAppHub then
				--We resume Friends Update only if we navigate to other tabs
				FriendsData:ResumeUpdate()
			end
		end
	end

	function this:Focus()
		inFocus = true
		UpdateLayout()
		self:SetSelectionObject()
		OnProfileButtonSelectionChanged()
	end

	function this:RemoveFocus()
		inFocus = false
		local selectedObject = GuiService.SelectedCoreObject
		if selectedObject and selectedObject:IsDescendantOf(HomePaneContainer) then
			Utility.SetSelectedCoreObject(nil)
		end
	end

	function this:SetPosition(newPosition)
		HomePaneContainer.Position = newPosition
	end

	function this:SetParent(newParent)
		HomePaneContainer.Parent = newParent
	end

	function this:IsAncestorOf(object)
		return HomePaneContainer and HomePaneContainer:IsAncestorOf(object)
	end

	return this
end

return CreateHomePane