using System;
using System.Text;
using System.IO;
using System.Runtime.InteropServices;
using Microsoft.Win32.SafeHandles;

namespace Aiwaz.Common
{
    public class Win32Console : IDisposable
    {
        [DllImport("kernel32.dll", EntryPoint = "FreeConsole", SetLastError = true, CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        public static extern int FreeConsole();
        [DllImport("kernel32.dll", EntryPoint = "GetStdHandle", SetLastError = true, CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        private static extern IntPtr GetStdHandle(int nStdHandle);
        [DllImport("kernel32.dll", EntryPoint = "AllocConsole", SetLastError = true, CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        private static extern int AllocConsole();

        private const int STD_OUTPUT_HANDLE = -11;
        private const int MY_CODE_PAGE = 437;

        public Win32Console()
        {
            AllocConsole();
            IntPtr stdHandle = GetStdHandle(STD_OUTPUT_HANDLE);
            SafeFileHandle safeFileHandle = new SafeFileHandle(stdHandle, true);
            FileStream fileStream = new FileStream(safeFileHandle, FileAccess.Write);
            Encoding encoding = System.Text.Encoding.GetEncoding(MY_CODE_PAGE);
            StreamWriter standardOutput = new StreamWriter(fileStream, encoding);
            standardOutput.AutoFlush = true;
            Console.SetOut(standardOutput);
        }
    
        #region IDisposable Members

        public void  Dispose()
        {
            FreeConsole();
        }

        #endregion
    }
}