Public Class Game
    Public Event ResetUI()
    Public Event CardDealt(card, cardNumber, hide)
    Public Event SetTotalLabels(playerTotal, dealerTotal)
    Public Event ShowDealerCard(card)
    Public Event EndPlayerTurn()
    Public Event EndGame(winMessage)
    Public Event MessageLabel(message)

    Private player As Player
    Private dealer As Dealer
    Private deck As List(Of Tuple(Of String, String))
    Private WithEvents dealerDelay As Timer

    Public Sub Start()
        Init()
        player.Start()
        dealer.Start()
        DealCard(player)
        DealCard(dealer)
        DealCard(player)
        DealCard(dealer, hide:=True)
        CheckPlayer(player)
        CheckPlayer(dealer, True)
    End Sub

    Sub Init()
        player = New Player()
        dealer = New Dealer()
        deck = CreateDeck()
        RaiseEvent ResetUI()
    End Sub

    Sub DealCard(playerDealt As Object, Optional hide As Boolean = False)
        Dim card As Tuple(Of String, String) = deck(0)
        playerDealt.hand.Add(card)
        deck.RemoveAt(0)
        GetTotal(playerDealt, hide)
        If hide Then
            playerDealt.hidden = card
        End If
        Dim cardNumber As String =
                If(TypeOf playerDealt Is Dealer, (playerDealt.hand.Count + 5).ToString(), playerDealt.hand.Count)

        RaiseEvent CardDealt(card, cardNumber, hide)
        RaiseEvent SetTotalLabels(player.total, dealer.total)
    End Sub

    Sub GetTotal(playerToCheck As Object, Optional hide As Boolean = False)
        Dim cards As List(Of Tuple(Of String, String)) = playerToCheck.hand
        If cards.Count = 0 Then
            playerToCheck.total = 0
            Return
        End If
        Dim total = 0
        Dim aceTotal = 0
        For Each card In cards
            Dim num As String = card.Item2
            If num = "K" Or num = "Q" Or num = "J" Then
                num = 10
            End If
            If num = "A" Then
                num = 11
                aceTotal += 1
            End If
            num = Integer.Parse(num)
            total += num
        Next
        While (aceTotal > 0 And total > 21)
            aceTotal -= 1
            total -= 10
        End While
        If hide Then
            playerToCheck.trueTotal = total
        Else
            playerToCheck.total = total
        End If
    End Sub

    Sub CheckPlayer(playerToCheck As Object, Optional peek As Boolean = False)
        Dim total As Integer = playerToCheck.total
        If peek Then
            total = playerToCheck.trueTotal
        End If
        If total = 21 And playerToCheck.hand.Count = 2 Then
            playerToCheck.winType = WinCondition.Blackjack
            playerToCheck.ingame = False
            If peek Then
                player.ingame = False
            Else
                dealer.ingame = False
            End If
            DealerTurn()
        ElseIf total > 21 Then
            playerToCheck.winType = WinCondition.Bust
            playerToCheck.ingame = False
            DealerTurn()
        ElseIf total < 22 And playerToCheck.hand.Count = 5 Then
            playerToCheck.winType = WinCondition.FiveCard
            playerToCheck.ingame = False
            dealer.ingame = False
            DealerTurn()
        End If
        If total = 21 Then
            playerToCheck.ingame = False
            DealerTurn()
        End If
    End Sub

    Sub DealerTurn()
        GetTotal(dealer)
        RaiseEvent MessageLabel("Dealer's turn...")
        RaiseEvent EndPlayerTurn()
        RaiseEvent SetTotalLabels(player.total, dealer.total)
        RaiseEvent ShowDealerCard(dealer.hidden)
        If player.winType = WinCondition.Bust Then
            CheckGame()
            Exit Sub
        End If
        If dealer.ingame Then
            If dealer.total = 21 And dealer.hand.Count = 2 Then
                dealer.winType = WinCondition.Blackjack
                dealer.ingame = False
            ElseIf dealer.total > 21 Then
                dealer.winType = WinCondition.Bust
                player.ingame = False
            ElseIf dealer.total < dealer.limit And dealer.hand.Count < 5 Then
                dealerDelay = New Timer With {
                    .Interval = 1000
                    }
                dealerDelay.Start()
                Exit Sub
            Else
                dealer.winType = WinCondition.NormalWin
            End If
        End If
        CheckGame()
    End Sub

    Sub OnTickDealerDelay(sender As Object, e As EventArgs) Handles dealerDelay.Tick
        dealerDelay.Stop()
        dealerDelay.Dispose()
        DealCard(dealer)
        DealerTurn()
    End Sub

    Sub Hit()
        If player.hand.Count < 5 And player.ingame Then
            DealCard(player)
            CheckPlayer(player)
        End If
    End Sub

    Sub Stand()
        If player.ingame Then
            player.ingame = False
            DealerTurn()
        End If
    End Sub

    Sub CheckGame()
        Dim winMessage As String = GetResults()
        RaiseEvent EndGame(winMessage)
    End Sub

    Function GetResults()
        Select Case True
            Case dealer.winType = WinCondition.Blackjack
                If player.winType = WinCondition.Blackjack Then
                    Return "Player ties with Blackjack!"
                Else
                    Return "Dealer wins with Blackjack!"
                End If
            Case player.winType = WinCondition.Blackjack
                Return "Player wins with Blackjack!"
            Case player.winType = WinCondition.FiveCard
                Return "Player wins with Five Card Charlie!"
            Case player.winType = WinCondition.Bust
                Return "Player busts!"
            Case dealer.winType = WinCondition.Bust
                Return "Dealer busts!"
            Case player.total > dealer.total
                Return "Player wins with a total of " & player.total.ToString() & "!"
            Case player.total = dealer.total
                Return "Tie!"
            Case Else
                Return "Dealer wins with a total of " & dealer.total.ToString() & "!"
        End Select
    End Function

    Shared Function CreateDeck() As List(Of Tuple(Of String, String))
        Dim response As New List(Of Tuple(Of String, String))
        Dim nums As String() = {"A", "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K"}
        Dim suits As String() = {"Hearts", "Diamonds", "Spades", "Clubs"}
        For Each suit As String In suits
            For Each num As String In nums
                response.Add(Tuple.Create(suit, num))
            Next
        Next
        Return Utilities.Shuffle(response)
    End Function
End Class

Public Enum WinCondition
    Bust
    NormalWin
    FiveCard
    Blackjack
End Enum