Public Class PageDownloadCfDetail
    Private CfItem As MyCfItem = Nothing
    Private Project As DlCfProject

#Region "加载器"

    '初始化加载器信息
    Private Sub PageDownloadCfDetail_Inited(sender As Object, e As EventArgs) Handles Me.Initialized
        Project = FrmMain.PageCurrent.Additional
        PageLoaderInit(Load, PanLoad, PanMain, CardIntro, DlCfFileLoader, AddressOf Load_OnFinish, AddressOf LoaderInput)
    End Sub
    Private Function LoaderInput() As KeyValuePair(Of Integer, Boolean)
        Return New KeyValuePair(Of Integer, Boolean)(Project.Id, Project.IsModPack)
    End Function
    '自动重试
    Private Sub Load_State(sender As Object, state As MyLoading.MyLoadingState, oldState As MyLoading.MyLoadingState) Handles Load.StateChanged
        Select Case DlCfFileLoader.State
            Case LoadState.Failed
                Dim ErrorMessage As String = ""
                If DlCfFileLoader.Error IsNot Nothing Then ErrorMessage = DlCfFileLoader.Error.Message
                If ErrorMessage.Contains("不是有效的 Json 文件") Then
                    Log("[Download] 下载的 Mod 列表 Json 文件损坏，已自动重试", LogLevel.Debug)
                    PageLoaderRestart()
                End If
        End Select
    End Sub
    '结果 UI 化
    Private Class VersionSorterWithSelect
        Implements IComparer(Of String)
        Public Top As String = ""
        Public Function Compare(x As String, y As String) As Integer Implements IComparer(Of String).Compare
            If x = y Then Return 0
            If x = Top Then Return -1
            If y = Top Then Return 1
            Return -VersionSortInteger(x, y)
        End Function
        Public Sub New(Optional Top As String = "")
            Me.Top = If(Top, "")
        End Sub
    End Class
    Private Sub Load_OnFinish()

        '初始化字典，并将当前版本排在最上面
        Dim TopVersion As String
        If Project.IsModPack Then
            TopVersion = If(PageDownloadPack.Loader.Input.GameVersion, "")
        Else
            TopVersion = If(PageDownloadMod.Loader.Input.GameVersion, "")
        End If
        Dim Dict As New SortedDictionary(Of String, List(Of DlCfFile))(New VersionSorterWithSelect(TopVersion))
        'PCL#8826 汇报了奇怪的这个 Try 块里出现 NPE 的问题，但实在找不到，就瞎加点检测
        Try
            Dict.Add("未知版本", New List(Of DlCfFile))
            If DlCfFileLoader.Output Is Nothing Then
                Log("[Download] 列表加载输出为 Nothing，请反馈此问题", LogLevel.Feedback)
                Exit Try
            End If
            For Each Version As DlCfFile In DlCfFileLoader.Output
                If Version Is Nothing Then
                    Log("[Download] 列表中的一个版本为 Nothing，请反馈此问题", LogLevel.Feedback)
                    Continue For
                End If
                If Version.GameVersion Is Nothing Then
                    Log("[Download] 列表中的一个版本没有任何适配的游戏版本，返回为 Nothing，请反馈此问题", LogLevel.Feedback)
                    Continue For
                End If
                For Each GameVersion In Version.GameVersion
                    '决定添加到哪个版本
                    Dim TargetVersion As String
                    If GameVersion Is Nothing OrElse GameVersion.Split(".").Count < 2 Then
                        TargetVersion = "未知版本"
                    Else
                        TargetVersion = GameVersion
                    End If
                    '实际进行添加
                    If Not Dict.ContainsKey(TargetVersion) Then Dict.Add(TargetVersion, New List(Of DlCfFile))
                    If Not Dict(TargetVersion).Contains(Version) Then Dict(TargetVersion).Add(Version)
                Next
            Next
        Catch ex As Exception
            Log(ex, "准备工程下载列表出错", LogLevel.Feedback)
        End Try

#Region "转化为 UI"
        Try
            '清空当前
            PanMain.Children.Clear()
            '转化为 UI
            For Each Pair As KeyValuePair(Of String, List(Of DlCfFile)) In Dict
                If Pair.Value.Count = 0 Then Continue For
                '增加卡片
                Dim NewCard As New MyCard With {.Title = Pair.Key, .Margin = New Thickness(0, 0, 0, 15), .SwapType = If(Project.IsModPack, 9, 8)}
                Dim NewStack As New StackPanel With {.Margin = New Thickness(20, MyCard.SwapedHeight, 18, 0), .VerticalAlignment = VerticalAlignment.Top, .RenderTransform = New TranslateTransform(0, 0), .Tag = Pair.Value}
                NewCard.Children.Add(NewStack)
                NewCard.SwapControl = NewStack
                PanMain.Children.Add(NewCard)
                '确定卡片是否展开
                If Pair.Key = TopVersion Then
                    MyCard.StackInstall(NewStack, If(Project.IsModPack, 9, 8), Pair.Key)
                Else
                    NewCard.IsSwaped = True
                End If
                '增加提示
                If Pair.Key = "未知版本" Then
                    NewStack.Children.Add(New MyHint With {.Text = "由于 API 的版本信息更新缓慢，可能无法识别刚更新不久的 MC 版本，只需等待几天即可自动恢复正常。", .IsWarn = False, .Margin = New Thickness(0, 0, 0, 7)})
                End If
            Next
            '如果只有一张卡片，展开第一张卡片
            If PanMain.Children.Count = 1 Then
                CType(PanMain.Children(0), MyCard).IsSwaped = False
            End If
        Catch ex As Exception
            Log(ex, "可视化工程下载列表出错", LogLevel.Feedback)
        End Try
#End Region

    End Sub

#End Region

    Private IsFirstInit As Boolean = True
    Public Sub Init() Handles Me.PageEnter
        AniControlEnabled += 1
        Project = FrmMain.PageCurrent.Additional
        PanBack.ScrollToHome()

        '重启加载器
        If IsFirstInit Then
            '在 Me.Initialized 已经初始化了加载器，不再重复初始化
            IsFirstInit = False
        Else
            PageLoaderRestart(IsForceRestart:=True)
        End If

        '放置当前工程
        If CfItem IsNot Nothing Then PanIntro.Children.Remove(CfItem)
        CfItem = Project.ToCfItem(True, True)
        CfItem.Margin = New Thickness(-7, -7, 0, 8)
        PanIntro.Children.Insert(0, CfItem)

        '决定按钮显示
        BtnIntroWiki.Visibility = If(Project.WikiId = 0, Visibility.Collapsed, Visibility.Visible)
        BtnIntroMCBBS.Visibility = If(Project.MCBBS Is Nothing, Visibility.Collapsed, Visibility.Visible)

        AniControlEnabled -= 1
    End Sub

    '整合包下载（安装）
    Public Sub Install_Click(sender As MyListItem, e As EventArgs)
        Try

            '获取基本信息
            Dim File As DlCfFile = sender.Tag
            Dim LoaderName As String = "CurseForge 整合包下载：" & Project.ChineseName & " "

            '获取版本名
            Dim PackName As String = Project.ChineseName.Replace(".zip", "").Replace(".rar", "").Replace("\", "＼").Replace("/", "／").Replace("|", "｜").Replace(":", "：").Replace("<", "＜").Replace(">", "＞").Replace("*", "＊").Replace("?", "？").Replace("""", "").Replace("： ", "：")
            Dim Validate As New ValidateFolderName(PathMcFolder & "versions")
            If Validate.Validate(PackName) <> "" Then PackName = ""
            Dim VersionName As String = MyMsgBoxInput(PackName, New ObjectModel.Collection(Of Validate) From {Validate},
                                                  Title:="输入版本名", Button2:="取消")
            If String.IsNullOrEmpty(VersionName) Then Exit Sub

            '构造步骤加载器
            Dim Loaders As New List(Of LoaderBase)
            Dim Target As String = PathMcFolder & "versions\" & VersionName & "\原始整合包.zip"
            Dim LogoFileAddress As String = PathTemp & "CFLogo\" & GetHash(CfItem.Logo) & ".png"
            Loaders.Add(New LoaderDownload("下载整合包文件", New List(Of NetFile) From {File.GetDownloadFile(Target, True)}) With {.ProgressWeight = 10, .Block = True})
            Loaders.Add(New LoaderTask(Of Integer, Integer)("准备安装整合包",
                                                            Sub()
                                                                If Not ModpackInstall(Target, VersionName, Logo:=If(IO.File.Exists(LogoFileAddress), LogoFileAddress, Nothing)) Then
                                                                    Throw New Exception("整合包安装出现异常！")
                                                                End If
                                                            End Sub) With {.ProgressWeight = 0.1})

            '启动
            Dim Loader As New LoaderCombo(Of String)(LoaderName, Loaders) With {.OnStateChanged = Sub(MyLoader)
                                                                                                      Select Case MyLoader.State
                                                                                                          Case LoadState.Failed
                                                                                                              Hint(MyLoader.Name & "失败：" & GetExceptionSummary(MyLoader.Error), HintType.Critical)
                                                                                                          Case LoadState.Aborted
                                                                                                              Hint(MyLoader.Name & "已取消！", HintType.Info)
                                                                                                          Case LoadState.Loading
                                                                                                              Exit Sub '不重新加载版本列表
                                                                                                      End Select
                                                                                                      McInstallFailedClearFolder(MyLoader)
                                                                                                  End Sub}
            Loader.Start(PathMcFolder & "versions\" & VersionName & "\")
            LoaderTaskbarAdd(Loader)
            FrmMain.BtnExtraDownload.ShowRefresh()
            FrmMain.BtnExtraDownload.Ribble()

        Catch ex As Exception
            Log(ex, "下载 CurseForge 整合包失败", LogLevel.Feedback)
        End Try
    End Sub
    'Mod 下载；整合包另存为
    Public Shared CachedFolder As String = Nothing '仅在本次缓存的下载文件夹
    Public Sub Save_Click(sender As Object, e As EventArgs)
        Dim File As DlCfFile = If(TypeOf sender Is MyListItem, sender, sender.Parent).Tag
        RunInNewThread(
        Sub()
            Try
                Dim Desc As String = If(Project.IsModPack, "整合包", "Mod ")
                '确认默认保存位置
                Dim DefaultFolder As String = Nothing
                If Not Project.IsModPack Then
                    '获取 Mod 所需的加载器种类
                    Dim AllowForge As Boolean? = Nothing, AllowFabric As Boolean? = Nothing 'FUTURE: Quilt 支持
                    If File.ModLoaders.Count > 0 Then '从文件中获取
                        AllowForge = False : AllowFabric = False
                        For Each LoaderType In File.ModLoaders
                            If LoaderType = "Forge" Then AllowForge = True
                            If LoaderType = "Fabric" Then AllowFabric = True
                        Next
                    ElseIf Project.ModLoaders.Count > 0 Then '从工程中获取
                        AllowForge = False : AllowFabric = False
                        For Each LoaderType In Project.ModLoaders
                            If LoaderType = "Forge" Then AllowForge = True
                            If LoaderType = "Fabric" Then AllowFabric = True
                        Next
                    End If
                    If AllowForge IsNot Nothing AndAlso Not AllowForge AndAlso
                       AllowFabric IsNot Nothing AndAlso Not AllowFabric Then
                        AllowForge = Nothing : AllowFabric = Nothing
                    End If
                    Log("[Download] 允许 Forge：" & If(AllowForge, "未知") & "，允许 Fabric：" & If(AllowFabric, "未知"))
                    '判断某个版本是否符合要求
                    Dim IsVersionSuitable As Func(Of McVersion, Boolean) =
                            Function(Version)
                                If Not Version.IsLoaded Then Version.Load()
                                If Not Version.Modable Then Return False
                                If File.GameVersion.Any(Function(v) v.Contains(".")) AndAlso
                                   Not File.GameVersion.Any(Function(v) v.Contains(".") AndAlso v.Split(".")(1) = Version.Version.McCodeMain.ToString) Then Return False
                                If AllowForge Is Nothing OrElse AllowFabric Is Nothing Then Return True
                                If AllowForge AndAlso Version.Version.HasForge Then Return True
                                If AllowFabric AndAlso Version.Version.HasFabric Then Return True
                                Return False
                            End Function
                    '获取 Mod 默认下载位置
                    If CachedFolder IsNot Nothing Then
                        DefaultFolder = CachedFolder
                        Log("[Download] 使用上次下载时的文件夹作为默认下载位置")
                    ElseIf McVersionCurrent IsNot Nothing AndAlso IsVersionSuitable(McVersionCurrent) Then
                        DefaultFolder = McVersionCurrent.PathIndie & "mods\"
                        Directory.CreateDirectory(DefaultFolder)
                        Log("[Download] 使用当前版本的 mods 文件夹作为默认下载位置（" & McVersionCurrent.Name & "）")
                    Else
                        Dim NeedLoad As Boolean = McVersionListLoader.State <> LoadState.Finished
                        If NeedLoad Then
                            Hint("正在查找适合的游戏版本……")
                            LoaderFolderRun(McVersionListLoader, PathMcFolder, LoaderFolderRunType.ForceRun, MaxDepth:=1, ExtraPath:="versions\", WaitForExit:=True)
                        End If
                        Dim SuitableVersions As New List(Of McVersion)
                        For Each Version As McVersion In McVersionList.Values.SelectMany(Function(l) l)
                            If IsVersionSuitable(Version) Then SuitableVersions.Add(Version)
                        Next
                        If SuitableVersions.Count = 0 Then
                            DefaultFolder = PathMcFolder
                            If NeedLoad Then
                                Hint("当前 MC 文件夹中没有找到适合这个 Mod 的版本！")
                            Else
                                Log("[Download] 由于当前版本不兼容，使用当前的 MC 文件夹作为默认下载位置")
                            End If
                        Else '选择 Mod 数量最多的版本
                            Dim SelectedVersion = SuitableVersions.OrderBy(Function(v)
                                                                               Dim Info As New DirectoryInfo(v.PathIndie & "mods\")
                                                                               Return If(Info.Exists, Info.GetFiles().Length, -1)
                                                                           End Function).LastOrDefault()
                            DefaultFolder = SelectedVersion.PathIndie & "mods\"
                            Directory.CreateDirectory(DefaultFolder)
                            Log("[Download] 使用适合的游戏版本作为默认下载位置（" & SelectedVersion.Name & "）")
                        End If
                    End If
                End If
                '获取基本信息
                Dim ChineseName As String = If(Project.ChineseName = Project.Name, "",
                        Project.ChineseName.Replace(" (", "Å").Split("Å").First.Replace("\", "＼").Replace("/", "／").Replace("|", "｜").Replace(":", "：").Replace("<", "＜").Replace(">", "＞").Replace("*", "＊").Replace("?", "？").Replace("""", "").Replace("： ", "："))
                Dim FileName As String
                Select Case Setup.Get("ToolDownloadTranslate")
                    Case 0
                        FileName = If(ChineseName = "", "", "[" & ChineseName & "] ") & File.FileName
                    Case 1
                        FileName = If(ChineseName = "", "", ChineseName & "-") & File.FileName
                    Case 2
                        FileName = File.FileName & If(ChineseName = "", "", "-" & ChineseName)
                    Case Else
                        FileName = File.FileName
                End Select
                RunInUi(
                Sub()
                    '弹窗要求选择保存位置
                    Dim Target As String
                    If File.FileName.EndsWith(".litemod") Then
                        Target = SelectAs("选择保存位置", FileName, Desc & "文件|" & If(Project.IsModPack, "*.zip", "*.litemod"), DefaultFolder)
                    Else
                        Target = SelectAs("选择保存位置", FileName, Desc & "文件|" & If(Project.IsModPack, "*.zip", "*.jar"), DefaultFolder)
                    End If
                    If Not Target.Contains("\") Then Exit Sub
                    '构造步骤加载器
                    Dim LoaderName As String = Desc & "下载：" & File.DisplayName & " "
                    If Target <> DefaultFolder AndAlso Not Project.IsModPack Then CachedFolder = GetPathFromFullPath(Target)
                    Dim Loaders As New List(Of LoaderBase)
                    Loaders.Add(New LoaderDownload("下载文件", New List(Of NetFile) From {File.GetDownloadFile(Target, True)}) With {.ProgressWeight = 6, .Block = True})
                    '启动
                    Dim Loader As New LoaderCombo(Of Integer)(LoaderName, Loaders) With {.OnStateChanged = AddressOf DownloadStateSave}
                    Loader.Start(1)
                    LoaderTaskbarAdd(Loader)
                    FrmMain.BtnExtraDownload.ShowRefresh()
                    FrmMain.BtnExtraDownload.Ribble()
                End Sub)
            Catch ex As Exception
                Log(ex, "保存 CurseForge 文件失败", LogLevel.Feedback)
            End Try
        End Sub, "Download CFDetail Save")
    End Sub

    Private Sub BtnIntroCf_Click(sender As Object, e As EventArgs) Handles BtnIntroCf.Click
        OpenWebsite(Project.Website)
    End Sub
    Private Sub BtnIntroWiki_Click(sender As Object, e As EventArgs) Handles BtnIntroWiki.Click
        OpenWebsite("https://www.mcmod.cn/class/" & Project.WikiId & ".html")
    End Sub
    Private Sub BtnIntroMCBBS_Click(sender As Object, e As EventArgs) Handles BtnIntroMCBBS.Click
        OpenWebsite("https://www.mcbbs.net/thread-" & Project.MCBBS & "-1-1.html")
    End Sub

End Class