using System;
using System.Net.NetworkInformation;
using System.Threading;
using Gtk;
using MelonVPNCore;

public partial class MainWindow : Window
{
    private Label statusLabel;
    private Button startBtn;
    private Button stopBtn;
    private Button refreshBtn;
    private Button viewClientsBtn;
    private Thread startupCheckThread;
    private ThreadWrapper wrapper;

    public MainWindow() : base(WindowType.Toplevel)
    {
        Build();

        Title = "Melon VPN";
        SetSizeRequest(300, 300);
        SetDefaultSize(300, 300);
        SetPosition(WindowPosition.Center);

        Resizable = false;
        TypeHint = Gdk.WindowTypeHint.Normal;
        Present();

        statusLabel = new Label
        {
            Visible = true,
            Text = "Loading..."
        };
        fixed1.Put(statusLabel, 10, 10);

        startBtn = new Button
        {
            Visible = true,
            Label = "Start"
        };
        startBtn.SetSizeRequest(80, 30);
        startBtn.Clicked += OnStartClicked;
        fixed1.Put(startBtn, 10, 40);

        stopBtn = new Button
        {
            Visible = true,
            Label = "Stop"
        };
        stopBtn.SetSizeRequest(80, 30);
        stopBtn.Clicked += OnStopClicked;
        fixed1.Put(stopBtn, 100, 40);

        refreshBtn = new Button
        {
            Visible = true,
            Label = "Refresh"
        };
        refreshBtn.SetSizeRequest(80, 30);
        refreshBtn.Clicked += OnRefreshClicked;
        fixed1.Put(refreshBtn, 190, 40);

        viewClientsBtn = new Button
        {
            Visible = true,
            Label = "View Clients"
        };
        viewClientsBtn.SetSizeRequest(100, 30);
        viewClientsBtn.Clicked += OnViewClientsClicked;
        fixed1.Put(viewClientsBtn, 10, 80);

        GUISocketServer.Receive += delegate (object sender, ClientResponseState s)
        {
            Console.WriteLine(s);
            Application.Invoke(delegate
            {
                UpdateStatus(s);
            });
        };
        GUISocketServer.ClientListUpdate += delegate (object sender, ConnectedClient[] clients)
        {
            Console.WriteLine(clients.Length);
            foreach (ConnectedClient c in clients)
            {
                Console.WriteLine(c.name + "--" + c.ip);
            }
        };
        wrapper = new ThreadWrapper(GUISocketServer.StartServer);

        startupCheckThread = new Thread(StartupCheckMethod)
        {
            IsBackground = true
        };
        startupCheckThread.Start();
    }

    string GetVpnInternalIp()
    {
        if (NetworkInterface.GetIsNetworkAvailable())
        {
            foreach (NetworkInterface f in NetworkInterface.GetAllNetworkInterfaces())
            {
                IPInterfaceProperties p = f.GetIPProperties();
                IPAddressInformationCollection addressesColl = p.AnycastAddresses;
                foreach (IPAddressInformation ip in addressesColl)
                {
                    if (ip.Address.ToString().StartsWith("10.137.248.", StringComparison.CurrentCulture))
                    {
                        return ip.Address.ToString();
                    }
                }
            }
        }
        return "";
    }

    void StartupCheckMethod()
    {
        ClientResponseState s = Client.SendDataMessage(DataMessage.Status);
        Console.WriteLine(s);
        Application.Invoke(delegate
        {
            UpdateStatus(s);
        });
    }

    void Refresh()
    {
        ClientResponseState s = Client.SendDataMessage(DataMessage.Status);
        switch (s)
        {
            case ClientResponseState.Error:
            case ClientResponseState.ServerError:
                UpdateStatus(s);
                MessageDialog md = new MessageDialog(this,
                    DialogFlags.DestroyWithParent, MessageType.Error,
                    ButtonsType.Ok, "Error stopping VPN. Is the daemon running?");
                md.Run();
                md.Destroy();
                break;
            case ClientResponseState.Online:
            case ClientResponseState.Offline:
                UpdateStatus(s);
                break;
        }
    }

    void UpdateStatus(ClientResponseState s)
    {
        switch (s)
        {
            case ClientResponseState.Error:
                statusLabel.Text = "Client Error";
                break;
            case ClientResponseState.ServerError:
                statusLabel.Text = "Server Error";
                break;
            case ClientResponseState.Blank:
                statusLabel.Text = "No reply";
                break;
            case ClientResponseState.Online:
                statusLabel.Text = "Online - " + GetVpnInternalIp();
                break;
            case ClientResponseState.Offline:
                statusLabel.Text = "Offline";
                break;
            default:
                statusLabel.Text = "Unknown";
                break;
        }
    }

    protected void OnDeleteEvent(object sender, DeleteEventArgs a)
    {
        if (wrapper != null)
        {
            wrapper.Kill();
            wrapper.Join();
        }
        Application.Quit();
        a.RetVal = true;
    }

    void OnStartClicked(object sender, EventArgs e)
    {
        ClientResponseState s = Client.SendDataMessage(DataMessage.Start);
        switch (s)
        {
            case ClientResponseState.Error:
            case ClientResponseState.ServerError:
            case ClientResponseState.Offline:
                UpdateStatus(s);
                MessageDialog md = new MessageDialog(this,
                    DialogFlags.DestroyWithParent, MessageType.Error,
                    ButtonsType.Ok, "Error starting VPN. Is the daemon running?");
                md.Run();
                md.Destroy();
                break;
        }
    }

    void OnStopClicked(object sender, EventArgs e)
    {
        ClientResponseState s = Client.SendDataMessage(DataMessage.Stop);
        switch (s)
        {
            case ClientResponseState.Error:
            case ClientResponseState.ServerError:
            case ClientResponseState.Online:
                UpdateStatus(s);
                MessageDialog md = new MessageDialog(this,
                    DialogFlags.DestroyWithParent, MessageType.Error,
                    ButtonsType.Ok, "Error stopping VPN. Is the daemon running?");
                md.Run();
                md.Destroy();
                break;
        }
    }

    void OnRefreshClicked(object sender, EventArgs e)
    {
        Refresh();
    }

    void OnViewClientsClicked(object sender, EventArgs e)
    {
        Refresh();
    }
}