Imports Newtonsoft.Json

Public Class BFrmLogin

    ' TODO: 插入代码，以使用提供的用户名和密码执行自定义的身份验证
    ' (请参阅 https://go.microsoft.com/fwlink/?LinkId=35339)。  
    ' 随后自定义主体可附加到当前线程的主体，如下所示: 
    '     My.User.CurrentPrincipal = CustomPrincipal
    ' 其中 CustomPrincipal 是用于执行身份验证的 IPrincipal 实现。
    ' 随后，My.User 将返回 CustomPrincipal 对象中封装的标识信息
    ' 如用户名、显示名等

    ''' <summary>是否记住密码</summary>
    Private _isRecordPassWord As Boolean

    ''' <summary>是否自动登录</summary>
    Private _isAutoLogin As Boolean

    ''' <summary>是否正在登录中</summary>
    Private _isLogging As Boolean

    ''' <summary>产品索引</summary>
    Private _appid As Integer = 6 'BLV_Studio = 6
    'CSerialConfigTools = 1
    'Face server = 2
    'auth server = 3
    'blv_oa.com  = 4
    'RCU_MAC binding = 5
    'BLV_Studio = 6

    Private Sub FrmLogin_Load(sender As Object, e As EventArgs) Handles Me.Load
        LoadSettings()

        Try
            TxtUserName.ForeColor = Color.FromArgb(0, 155, 134)
            TxtUserName.Text = Aes128.DecryptStr(My.Settings.UserAccount, Aes128.ServerAesKey)
        Catch ex As Exception


            ' TxtUserName.Text = String.Empty
        End Try

        Try

            TxtPwd.ForeColor = Color.FromArgb(0, 155, 134)
            TxtPwd.Text = Aes128.DecryptStr(My.Settings.UserPassword, Aes128.ServerAesKey)
        Catch ex As Exception

            'TxtPwd.Text = String.Empty
        End Try
        TxtUserName_Leave(Nothing, Nothing)
        TxtPwd_Leave(Nothing, Nothing)
        ChkAutoLogin.Checked = _isAutoLogin
        ChkRecordPwd.Checked = _isRecordPassWord

        Text = $"{Application.ProductName} {Application.ProductVersion}"
    End Sub

    Private Sub LoginForm_Shown(sender As Object, e As EventArgs) Handles Me.Shown
        If _isAutoLogin Then
            TmrAutoLogin.Start()
        End If
    End Sub

    Private Sub FrmLogin_FormClosing(sender As Object, e As FormClosingEventArgs) Handles Me.FormClosing
        SaveSettings()
    End Sub

    Private Sub BtnLogin_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnLogin.Click
        CloseAutoLogin()
        If _isLogging Then Return
        _isLogging = True
        BtnLogin.BackgroundImage = BLV_Studio.My.Resources.Resources._6

        Dim user As String = TxtUserName.Text
        Dim pwd As String = TxtPwd.Text
        Try
            CheckUserAccount(user)
            CheckUserPassword(pwd)
            Dim login As LoginReturn = GetAccountAuth(user, pwd, _appid)

            '显示
            Dim frm As New FrmMain
            frm.Account = user
            frm.Pawss = pwd
            frm.AccountAuth = login.Data
            frm.Show()

            '关闭窗体
            Me.Close()
        Catch ex As Exception
            MsgBox(ex.Message, MsgBoxStyle.OkOnly, "登录失败")
            BtnLogin.BackgroundImage = BLV_Studio.My.Resources.Resources._5
        End Try

        _isLogging = False
    End Sub

    Private Function GetAccountAuth(user As String, pwd As String, appid As Integer) As LoginReturn
        Dim jsonString As String = HttpMothod.PostData("http://auth.blv-oa.com/OTApi/Login", $"Uid={user}&Pwd={pwd}&appid={_appid}")
        If String.IsNullOrWhiteSpace(jsonString) Then Throw New Exception($"用户鉴权异常，请联系管理员")

        Dim login As LoginReturn = JsonConvert.DeserializeObject(Of LoginReturn)(jsonString)
        If login Is Nothing Then Throw New Exception($"解析用户权限错误!")

        If login.Status <> 200 Then Throw New Exception($"Status: {login.Status} Msg:{login.Message}")

        Return login
    End Function

    Private Sub BtnCancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnCancel.Click
        Me.Close()
    End Sub


    ''' <summary>记住密码复选框状态修改触发事件</summary>
    Private Sub ChkKeepPwd_CheckedChanged(sender As Object, e As EventArgs) Handles ChkRecordPwd.CheckedChanged
        _isRecordPassWord = ChkRecordPwd.Checked
    End Sub

    ''' <summary>自动登录复选框状态修改触发事件</summary>
    Private Sub Chk_AutoLogin_CheckedChanged(sender As Object, e As EventArgs) Handles ChkAutoLogin.CheckedChanged
        _isAutoLogin = ChkAutoLogin.Checked
    End Sub

    Private Sub TxtPwd_TextChanged(sender As Object, e As EventArgs) Handles TxtUserName.TextChanged, TxtPwd.TextChanged
        CloseAutoLogin()
    End Sub

    Private Sub LoginForm_FormClosing(sender As Object, e As FormClosingEventArgs) Handles Me.FormClosing
        SaveSettings()
    End Sub

    Private Sub TmrAutoLogin_Tick(sender As Object, e As EventArgs) Handles TmrAutoLogin.Tick
        If String.IsNullOrEmpty(TxtUserName.Text) Then Return

        ' BtnLogin.PerformClick()
    End Sub


    Private Sub CheckUserAccount(userAccount As String)
        If String.IsNullOrWhiteSpace(userAccount) Then
            Throw New Exception($"请输入用户账号!")
        End If
    End Sub

    Private Sub CheckUserPassword(userPassword As String)
        If String.IsNullOrWhiteSpace(userPassword) Then
            Throw New Exception($"请输入密码!")
        End If
    End Sub


    ''' <summary>读取Setting中的缓存量</summary>
    Private Sub LoadSettings()
        My.Settings.Reload() '读取Setting中的内容
        _isAutoLogin = False ' My.Settings.IsAutoLogin
        _isRecordPassWord = My.Settings.IsRecordPassWord
    End Sub

    ''' <summary>保存Setting中的缓存量</summary>
    Private Sub SaveSettings()
        My.Settings.IsAutoLogin = _isAutoLogin
        My.Settings.IsRecordPassWord = _isRecordPassWord

        If _isRecordPassWord Then
            My.Settings.UserAccount = Aes128.EncryptStr(TxtUserName.Text, Aes128.ServerAesKey)
            My.Settings.UserPassword = Aes128.EncryptStr(TxtPwd.Text, Aes128.ServerAesKey)
        Else
            My.Settings.UserAccount = String.Empty
            My.Settings.UserPassword = String.Empty
        End If
        My.Settings.Save()
    End Sub



    Private Sub CloseAutoLogin()
        If TmrAutoLogin.Enabled Then
            TmrAutoLogin.Stop()
            Text = $"{My.Application.Info.ProductName} Login [Auto Login Cancelled...]"
        End If
    End Sub



    Private Sub TxtPwd_Enter(sender As Object, e As EventArgs) Handles TxtPwd.Enter
        If (TxtPwd.Text.Trim().Equals("请输入密码")) Then
            TxtPwd.Text = ""
        End If

    End Sub

    Private Sub TxtUserName_Enter(sender As Object, e As EventArgs) Handles TxtUserName.Enter
        If (TxtUserName.Text.Trim().Equals("请输入账号")) Then
            TxtUserName.Text = ""
        End If
    End Sub

    Private Sub TxtUserName_Leave(sender As Object, e As EventArgs) Handles TxtUserName.Leave
        'TxtUserName.ForeColor = Color.Black
        If (String.IsNullOrWhiteSpace(TxtUserName.Text)) Then
            TxtUserName.ForeColor = Color.FromArgb(0, 155, 134)
            TxtUserName.Text = "请输入账号"
        End If



    End Sub

    Private Sub TxtPwd_Leave(sender As Object, e As EventArgs) Handles TxtPwd.Leave
        'TxtPwd.ForeColor = Color.Black
        TxtPwd.PasswordChar = "*"
        If (String.IsNullOrWhiteSpace(TxtPwd.Text)) OrElse TxtUserName.Text.Trim().Equals("请输入账号") Then
            TxtPwd.ForeColor = Color.FromArgb(0, 155, 134)
            TxtPwd.PasswordChar = String.Empty
            TxtPwd.Text = "请输入密码"

        End If
    End Sub
End Class