Imports System.Text
Imports System.Security.Cryptography

Module modMainServer
    Public WithEvents Socket As New WinsockServer
    Public WithEvents StatusSocket As New WinsockServer
    Dim MonsterThread As New System.Threading.Thread(AddressOf MonsterProcess)
    Dim LastPacket As String = ""

#Region "Start Server"

    Public Sub StartServer()
        If Config.EnableLogging = True Then
            LogStream = New IO.FileStream(Config.LogDir & LogFile & ".txt", IO.FileMode.Append)
        End If
        Log(":Game Server started", "", 1)

        AddLog("SQL", "Connecting to SQL...")
        ConnectSQL()

        LoadItemID()

        AddLog("Server", "Loading Exp Data...")
        LoadExp()
        AddLog("Server", "Exp Data Loaded.")

        AddLog("Server", "Loading Maps...")
        FillMapList()
        GetDoors()
        AddLog("Server", "Maps Loaded.")

        AddLog("Server", "Loading Npcs...")
        LoadNpcs()
        AddLog("Server", "Npcs Loaded.")

        AddLog("Server", "Loading Items...")
        LoadItemStatList()
        AddLog("Server", "Items Loaded.")

        AddLog("Server", "Loading Monsters...")
        LoadMonsterStats()
        LoadSpawnTable()
        AddLog("Server", "Monsters Loaded.")

        AddLog("Server", "Loading Magics...")
        LoadMagics()
        AddLog("Server", "Magics Loaded.")

        AddLog("Server", "Loading Players Items...")
        LoadPlayerItems()
        AddLog("Server", "Players Items Loaded.")

        AddLog("Server", "Loading GameMaster List...")
        LoadGameMasterList()
        AddLog("Server", "GameMaster List Loaded.")

        AddLog("Server", "Loading Notice...")
        LoadNotice()
        AddLog("Server", "Notice Loaded.")

        AddLog("Game Server", "Loading Guild List...")
        LoadGuilds()
        AddLog("Game Server", "Guild List Loaded.")

        AddLog("Server", "Starting Monsters AI...")
        MonsterThread.IsBackground = True
        MonsterThread.Start()
        AddLog("Server", "Monster AI Started.")

        Socket.Listen(Config.GamePort)
        StatusSocket.Listen(25000)
        AddLog("Socket", "Listening on Port: " & Config.GamePort)

        AddLog("::::Game Server started::::", "")
    End Sub

#End Region

#Region "Socket Handles"

    Private Sub Socket_onDataArrival(ByVal sData() As Byte, ByVal State As modSocket.State) Handles Socket.onDataArrival
        Dim Packet As String
        Dim Pieces() As String
        Dim iTotalBytes As Integer = GetByteCount(sData)

        ReDim Preserve sData(iTotalBytes)
        Packet = System.Text.Encoding.ASCII.GetString(sData)

        'MsgBox(Len(Packet2))

        If Not LastPacket = "" Then
            Packet = LastPacket & Packet
            LastPacket = ""
        End If

        If Not Right(Packet, 1) = Chr(30) Then
            LastPacket = Packet
            Exit Sub
        End If

        'add the old packet to new

        Packet = LastPacket & Packet

        Pieces = Split(Packet, Chr(30))

        Dim R As Integer

        For R = LBound(Pieces) To UBound(Pieces)
            Packet = Pieces(R)
            If Not Packet = "" Then ProcessPacket(Packet, State)
        Next R
    End Sub

    Private Sub ProcessPacket(ByVal Packet As String, ByVal State As State)
        Dim Body As String
        Dim Header As Header

        'Packet = System.Text.Encoding.ASCII.GetString(Data)
        'If Packet.Contains(":/") Then
        '    Dim Packet2 As String
        '    Dim n As Integer
        '    For n = 0 To 9
        '        Packet2 = GetTok(Packet, n, ":/")
        '        If Packet2 = "failure" Then Exit Sub
        '        Packet2 &= ":"
        '        Socket.SplitDataSend(Packet2, State)
        '    Next n
        '    Exit Sub
        'End If
        Header = DecodePacketHeader(Packet)
        Body = DecodePacketBody(Packet)

        If Socket.Lst.GetLogin(State.Index) = "" Then
            NewConnection(Body, State)
            Exit Sub
        End If

        Select Case Header.wIdent
            Case GameMsg.CM_GOGAME
                ProcessGoGame(State)
            Case GameMsg.CM_MOVE
                ProcessMove(Header, State)
            Case GameMsg.CM_TURN
                ProcessTurn(Header, State)
            Case GameMsg.CM_CHAT
                ProcessChat(Body, State)
            Case GameMsg.CM_CLICKNPC
                ProcessClickNpc(Header, State)
            Case GameMsg.CM_CLICKNPC_MENU
                ProcessClickNpcMenu(Header, Body, State)
            Case GameMsg.CM_NORMAL_HIT
                ProcessHit(Header, State)
            Case GameMsg.CM_TWOHANDED_HIT
            Case GameMsg.CM_PICKAXE_HIT
            Case GameMsg.CM_USEMAGIC
                ProcessMagicAttack(Header, State)
            Case GameMsg.CM_WEAR_ITEM
                ProcessWearItem(Header, State)
            Case GameMsg.CM_TAKEOFF_ITEM
                ProcessTakeOffItem(Header, State)
            Case GameMsg.CM_DROP_ITEM
                ProcessDropItem(Header, State)
            Case GameMsg.CM_PICKUP_ITEM
                ProcessPickupItem(Header, State)
            Case GameMsg.CM_USE_ITEM
                ProcessUseItem(Header, State)
            Case GameMsg.CM_REQUEST_GUILDINFO
                ProcessRequestGuildInfo(State)
        End Select

    End Sub

    Private Sub Socket_onAccept(ByVal State As State) Handles Socket.onAccept
        AddLog("Socket", Socket.Lst.GetIP(State.Index) & " Connected.")
        Log("User Connected", "IP: " & Socket.Lst.GetIP(State.Index))
        UserCount += 1
        FrmMain.UpdateUserCount()
    End Sub

    Private Sub Socket_onDisconnect(ByVal State As modSocket.State) Handles Socket.onDisconnect
        Dim Player As clsPlayer

        Player = ObjectList(State.Index)

        If Not Player Is Nothing Then

            'Tell everyone we quit
            ProcessPlayerDisappear(State.Index)

            SavePlayerData(Player)
            SavePlayerItems(Player)
            Dim PlayerMap As Map = Maps(Player.Map)
            Dim i As Integer
            For i = 0 To 9
                If PlayerMap.ObjectList.Contains(Player.X & "/" & Player.Y & "/" & i) Then
                    If PlayerMap.ObjectList(Player.X & "/" & Player.Y & "/" & i) = Player.StateId Then
                        PlayerMap.ObjectList.Remove(Player.X & "/" & Player.Y & "/" & i)
                    End If
                End If
            Next

            AddLog("User Disconnected", Player.Name & " has left the server.")
            AddLog("Socket", Socket.Lst.GetIP(State.Index) & " Disconnected.")
            Log("User Disconnected", "Character: " & Player.Name & " IP: " & Socket.Lst.GetIP(State.Index))
            UserCount -= 1
            FrmMain.UpdateUserCount()

            PlayerList.Remove(Player.Name)
            FrmMain.lstPlayers.Items.Remove(Player.Name)
            ObjectList.Remove(State.Index)
            Socket.Lst.Remove(State.Index)
        Else
            AddLog("Socket", Socket.Lst.GetIP(State.Index) & " Disconnected.")
            Log("User Disconnected", "IP: " & Socket.Lst.GetIP(State.Index))
            UserCount -= 1
            FrmMain.UpdateUserCount()

            Socket.Lst.Remove(State.Index)
        End If
    End Sub

    Private Sub Socket_onError(ByVal err As String, ByVal State As State) Handles Socket.onError
        If State Is Nothing Then
            Exit Sub
        End If
        'AddLog("Socket Error", Socket.Lst.GetIP(State.Index) & ": " & err)
    End Sub

#Region "Status Socket"

    Private Sub StatusSocket_onAccept(ByVal State As modSocket.State) Handles StatusSocket.onAccept
        AddLog("Status Socket", StatusSocket.Lst.GetIP(State.Index) & " recieved the user count.")
        StatusSocket.SendData(UserCount, State.Index)
        StatusSocket.DisconnectUser(State.Index)
    End Sub

#End Region

#End Region

#Region "Processing"

#Region "NewConnection"

    Public Sub NewConnection(ByVal Body As String, ByVal State As State)
        Dim Username As String = GetTok(Body, 0, "/")
        Dim Character As String = GetTok(Body, 1, "/")
        Dim Certification As String = GetTok(Body, 2, "/")
        Dim Version As String = GetTok(Body, 3, "/")
        Dim Password As String = GetTok(Body, 4, "/")
        Password = GenerateHash(Password)

        If CheckLogin(Username, Password) Then
            If Trim(Version) = Config.ClientVersion Then
                If CheckCert(Username, Certification) Then
                    If CharExistOnAcc(Username, Character) Then

                        Packets.SendNotice(Notice, State.Index)
                        Socket.Lst.SetLogin(State.Index, Username)
                        Socket.Lst.SetCharacter(State.Index, Character)
                        AddLog("User Connected", Character & " has connected to the server.")
                        FrmMain.lstPlayers.Items.Add(Character)
                    Else
                        AddLog("Error", Username & " tried to login onto " & Character & " from a different account.")
                        Packets.SendNoticeFail(State.Index)
                    End If
                Else
                    AddLog("Error", Username & " tried to login with wrong certification.")
                    Packets.SendNoticeFail(State.Index)
                End If
            Else
                AddLog("Incorrect Client", Username & " tried to login with wrong client.")
                Packets.SendNoticeFail(State.Index)
            End If
        Else
            AddLog("Error", Username & " tried to join the server with wrong Username or Password")
            Packets.SendNoticeFail(State.Index)
        End If

    End Sub

#End Region
#Region "ProcessGoGame"

    Public Sub ProcessGoGame(ByVal State As State)
        Dim PlayerName As String = Socket.Lst.GetCharacter(State.Index)
        If Not PlayerList(PlayerName) Is Nothing Then Exit Sub
        If PlayerList.Contains(PlayerName) Then Exit Sub 'Player already online

        Dim i As Integer
        Dim Player As New clsPlayer
        Player.LoadPlayer(PlayerName)
        Player.StateId = State.Index


        'Adds Player to Objectlist and Playerlist
        If ObjectList.Contains(State.Index) = False Then
            ObjectList.Add(State.Index, Player)
            PlayerList.Add(PlayerName, State.Index)
        End If

        Dim CheckMap As Map = Maps.Item(Player.Map)
        Dim Added As Boolean = False
        While i < 10 And Added = False
            If CheckMap.ObjectList.Contains(Player.X & "/" & Player.Y & "/" & i) = False Then
                CheckMap.ObjectList.Add(Player.X & "/" & Player.Y & "/" & i, PlayerList(PlayerName))
                Added = True
            End If
            i += 1
        End While

        Packets.SendNewMap(Player.StateId, Player.X, Player.Y, CheckMap.LightMode, CheckMap.MapFilename, CheckMap.MapName)
        Packets.SendCharStatus(Player.StateId, Player.Light, Player.Reved, Player.Name, Player.NameColour, Player.IsDead, Player.Gender, Player.GuildName, Player.GuildTitle, Player.GuildRank)
        Packets.SendBagItems(Player)
        Packets.SendEquipment(Player)
        Packets.SendMagics(Player)

        Packets.SendPlayerStats(Player.StateId, Player.Gold, Player.Job, GetPlayerStats(Player))

        Packets.SendChatMessage(Player.StateId, ChatColours.Green, Player.GetAttackMode, Player.StateId)
        Packets.SendChatMessage(Player.StateId, ChatColours.Green, "To change do: CTRL-H", Player.StateId)
        Packets.SendChatMessage(Player.StateId, ChatColours.Green, WelcomeMessage, Player.StateId)

        Packets.SendGoGame(Player.StateId, ToByte(Player.AllowGroup), ToByte(Player.AllowGroupRecall), Player.AttackMode, Player.Dir)
        ProcessMyAppears(State)
    End Sub

#End Region

#Region "ProcessMyAppears"

    Public Sub ProcessMyAppears(ByVal State As State)
        Dim Player As clsPlayer = ObjectList(State.Index)
        Dim tPlayer As New clsPlayer
        Dim Added As New Hashtable
        Dim Locals As Hashtable = GetLocalObjects(Player.X, Player.Y, Player.Map, 15, 15, Player.StateId)

        If Locals.Count = 0 Then Exit Sub