Imports System.IO

'PseudoCode
' Solve 3 way quandary, List of Words

'Get a Selection of Unused elements -(CountToBeUsed)
'Selection of Element are not all Used, Return Only Used (Class WordGroup)
'Use all Elements, Reset All Used - Manual & Auto (GetWordAutoReset() As String)   'Add a form Msg "All Words Reset" 

'Ex1 - Ex2 - Return Some Ellapsed Time



Public Class Form1



    Private m_wordGroups2 As List(Of WordGroup) = New List(Of WordGroup)()
    Dim allNumbers As New List(Of Integer)
    Dim selectedNumbers As New List(Of Integer)

    Dim CountToBeUsed As Integer

    Dim rand As New Random

    Public UseStreamreader As Boolean = False


    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load

        If UseStreamreader = True Then
            Dim path2 As String = Application.StartupPath & "\Def2.txt"
            m_wordGroups2.Add(New WordGroup(path2))

        Else
            Dim path1 As String = "one two three four five six seven eight nine"
            m_wordGroups2.Add(New WordGroup(path1))
        End If

    End Sub


    Private Sub rndword()

        CountToBeUsed = 5

        'Generic list for holding the lines  

        allNumbers.Clear()
        selectedNumbers.Clear()

        For i As Integer = 0 To m_wordGroups2(0).Count - 1
            If Not m_wordGroups2(0).m_wordList(i).Used Then
                allNumbers.Add(i)
            End If

        Next

        If allNumbers.Count > CountToBeUsed Then

            For i As Integer = 0 To CountToBeUsed

                Dim index As Integer = rand.Next(0, allNumbers.Count)
                Dim selectedNumber As Integer = allNumbers(index)

                selectedNumbers.Add(selectedNumber)

                allNumbers.RemoveAt(index)

            Next

            For i As Integer = 0 To selectedNumbers.Count - 1

                ListBox1.Items.Add(selectedNumbers(i).ToString)

            Next

            ListBox1.Items.Add(" end")
        Else
            'Get All

            CountToBeUsed = allNumbers.Count - 1

            For i As Integer = 0 To allNumbers.Count - 1
                selectedNumbers.Add(allNumbers(i))

            Next

            For i As Integer = 0 To selectedNumbers.Count - 1

                ListBox1.Items.Add(selectedNumbers(i).ToString)

            Next
            ListBox1.Items.Add(" end fin")
        End If


    End Sub

    ' Load file
    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles BtnAutoHandle.Click

        rndword()
        ' Manual Handle
        If Not m_wordGroups2(0).CountUsedWords() = m_wordGroups2(0).Count Then
            Dim scramble As String = m_wordGroups2(0).GetRandomWord()
            ListBox2.Items.Add(scramble)
        Else
            m_wordGroups2(0).ResetAllWords()
            MsgBox("All Words Used")
            Dim scramble As String = m_wordGroups2(0).GetRandomWord()
            ListBox2.Items.Add(scramble)
        End If

    End Sub

    Private Sub BtnTest_Click(sender As Object, e As EventArgs) Handles BtnTest.Click

        allNumbers.Clear()

        For i As Integer = 0 To m_wordGroups2(0).Count - 1
            If Not m_wordGroups2(0).m_wordList(i).Used Then
                allNumbers.Add(i)
            End If

        Next

        Dim Index As Integer = rand.Next(0, allNumbers.Count)
        Dim GetIndexValue As Integer = allNumbers(Index)
        m_wordGroups2(0).m_wordList(GetIndexValue).Used = True

        TextBox2.AppendText(GetIndexValue.ToString & " ")

    End Sub
End Class


Public Class WordGroup
    Private m_letterCount As Integer = 0

    Public m_wordList As New List(Of WordItem)(1)
    Private m_trackUsedWords As Boolean = True

    Private m_highEnd As Integer = -1

    Private m_currentWord As String = ""

#Region "Read-only properties"
    Public ReadOnly Property Count() As Integer
        Get
            Return m_wordList.Count
        End Get
    End Property
    Public ReadOnly Property CountUsed() As Integer
        Get
            Return CountUsedWords()
        End Get
    End Property

    Public ReadOnly Property CurrentWord() As String
        Get
            Return m_currentWord
        End Get
    End Property
#End Region

#Region "Non-read-only properties"
    Public Property TrackRepeats() As Boolean
        Get
            Return m_trackUsedWords
        End Get
        Set(ByVal value As Boolean)
            m_trackUsedWords = value
        End Set
    End Property
#End Region

#Region "Constructors"

    Public Sub New(ByVal path As String)
        m_wordList.Clear()
        If Form1.UseStreamreader = True Then

            LoadFile(path)
        Else
            LoadFile2(path)

        End If


    End Sub
#End Region

    Public Function CountUsedWords() As Integer
        Dim used As Integer = 0

        For i As Integer = 0 To m_wordList.Count - 1
            If m_wordList(i).Used Then
                used += 1
            End If
        Next i

        Return used
    End Function

    Public Function LoadFile(ByVal fileName As String) As Boolean
        Dim success As Boolean = False
        Try
            Dim stream As New FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read)
            Dim reader As New StreamReader(stream)
            Dim words As String
            Do While Not reader.EndOfStream
                words = reader.ReadLine()
                If words.Length > 0 Then
                    Dim wordsplit() As String = words.Split(vbNewLine)
                    For i As Integer = 0 To wordsplit.Length - 1
                        Dim item As New WordItem(wordsplit(i).ToLower())
                        m_wordList.Add(item)
                    Next i
                End If
            Loop
            success = True
        Catch e As Exception
            If e IsNot Nothing Then
            End If
        End Try

        Return success
    End Function

    Public Function LoadFile2(ByVal words As String) As Boolean
        Dim success As Boolean = False
        Try


            If words.Length > 0 Then
                Dim wordsplit() As String = words.Split(" ")
            For i As Integer = 0 To wordsplit.Length - 1
                Dim item As New WordItem(wordsplit(i).ToLower())
                m_wordList.Add(item)
            Next i
            End If

            success = True
        Catch e As Exception
            If e IsNot Nothing Then
            End If
        End Try

        Return success
    End Function

    Public Sub ResetAllWords()

        For x As Integer = 0 To m_wordList.Count - 1

            If m_wordList(x).Used Then

                m_wordList(x).Used = False
            End If
        Next

    End Sub

    Public Function GetWordAutoReset() As String

        Dim randomWord As String = ""

        If Not CountUsed = m_wordList.Count Then
            randomWord = GetRandomWord()
            Return randomWord

        Else
            ResetAllWords()
            '
            randomWord = GetRandomWord()
            Return randomWord

        End If

    End Function

    Public Function GetRandomWord() As String
        If m_wordList.Count = 0 Then
            Return ""
        End If

        Dim rndm As New Random
        ' get the word we think we want to use
        Dim randomWord As String = ""
        Do While randomWord = ""
            Dim index As Integer = rndm.Next(0, m_wordList.Count)
            If (Not m_wordList(index).Used) Then
                randomWord = m_wordList(index).Text

                m_wordList(index).Used = True

            End If
        Loop

        Return randomWord
    End Function



End Class


Public Class WordItem
    Private m_text As String = ""
    Private m_used As Boolean = False
    Public ReadOnly Property Text() As String
        Get
            Return m_text
        End Get
    End Property
    Public Property Used() As Boolean
        Get
            Return m_used
        End Get
        Set(ByVal value As Boolean)
            m_used = value
        End Set
    End Property

    '--------------------------------------------------------------------------------
    Public Sub New(ByVal text As String)
        m_text = text
        m_used = False
    End Sub

End Class