using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Threading.Tasks;
using System.Windows;
using System.Net;
using System.Net.Sockets;
using System.Threading;
using System.Text;
using System.Windows.Interop;

namespace AndAnotherBackend
{
    /// <summary>
    /// Interaction logic for App.xaml
    /// </summary>
    public partial class App : Application
    {
        TcpListener server = null;
        public void SocketServer()
        {
            Int32 Port = 11000;
            IPAddress addr = IPAddress.Parse("0.0.0.0");

            server = new TcpListener(addr, Port);

            server.Start();

            Byte[] bytes = new Byte[256];
            String data = null;

            while (true)
            {
                Console.Write("Waiting for a connection... ");
                TcpClient client = server.AcceptTcpClient();
                Console.WriteLine("Connected!");
                NetworkStream stream = client.GetStream();
                int i;
                while ((i = stream.Read(bytes, 0, bytes.Length)) != 0)
                {
                    data = System.Text.Encoding.ASCII.GetString(bytes, 0, i);
                    Console.WriteLine("Received: {0}", data);
                    MessageBox.Show(data);
                    data = data.ToUpper();
                    byte[] msg = System.Text.Encoding.ASCII.GetBytes(data);
                    stream.Write(msg, 0, msg.Length);
                    Console.WriteLine("Sent: {0}", data);
                }
                client.Close();
            }
        }

        public String AskPy(string cmd) {
            // Here we build a TCP connection with the Python backend
            TcpClient client = new TcpClient();
            client.Connect(IPAddress.Loopback, 11001);
            NetworkStream stream = client.GetStream();
            byte[] msg = System.Text.Encoding.ASCII.GetBytes(cmd);
            stream.Write(msg, 0, msg.Length);
            byte[] bytes = new byte[256];
            String data = null;
            int i = stream.Read(bytes, 0, bytes.Length);
            data = System.Text.Encoding.ASCII.GetString(bytes, 0, i);
            client.Close();
            return data;
        }

        public App()
        {
            MainWindow holder = new MainWindow();
            holder.Loaded += (sender, e) =>
            {
                holder.Hide();
                holder.WindowState = WindowState.Minimized;
                holder.ShowInTaskbar = false;

                Thread t = new Thread(new ThreadStart(SocketServer));
                t.Start();

                int ScreenAmount = int.Parse(AskPy("monitor_amount"));
                int NextMove = 0;
                for(int i = 0; i < ScreenAmount; i++) {
                    string Sizes = AskPy("monitor_size " + i.ToString());
                    string[] SizesArray = Sizes.Split('x');
                    int width = int.Parse(SizesArray[0]);
                    int height = int.Parse(SizesArray[1]);
                    MainWindow CurrentWindow = new MainWindow();
                    CurrentWindow.Title = "ScreenHelper" + i.ToString();
                    CurrentWindow.Show();
                    IntPtr Handle = new WindowInteropHelper(CurrentWindow).Handle;
                    MoveWindow(Handle, NextMove, 0, width, height, true);
                    NextMove += width;
                }
                holder.webView = null;
                holder.Content = null;
            };
            this.Run(holder);
        }

        [System.Runtime.InteropServices.DllImport("user32.dll")]
        public static extern bool MoveWindow(IntPtr hWnd, int X, int Y, int nWidth, int nHeight, bool bRepaint);
        [System.Runtime.InteropServices.DllImport("user32.dll")]
        public static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);
    }
}