using Client.Config;
using Client.Utils;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Management;
using Microsoft.Win32;
using CefSharp.WinForms;
using CefSharp;

namespace Client2020
{
    static class Program
    {

        static Mutex CmsStepClientMutex = new Mutex(true, "{66fa29db-925a-402b-a4c7-d3d780fb1bc3}");

        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {

            //Crate General Exception Handler
            AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(GeneralExMethod);

            //Read App Configuration
            readConfiguration();

            //Initialize Chromium
            InitializeCefSettings();

            //Check if is already running an instance of this application
            if (!CmsStepClientMutex.WaitOne(TimeSpan.Zero, true))
                ShowAlarmAndClose("Only one istance of " + Application.ProductName + " can be executed!");


            //Check Graphic Card in Energy Saving mode
            checkGraphicCard();

            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);

            //Run the Loading Form
            Application.Run(new OpeningForm());

            //Run the Main-Browser Form
            Application.Run(new MainForm());
        }

        static private void InitializeCefSettings()
        {
            try
            {
                if (Config.ConnectionConfig.DeleteCahceFolderOnStartup && Directory.Exists(Constants.BROWSER_CACHE_FOLDER))
                {
                    Directory.Delete(Constants.BROWSER_CACHE_FOLDER, true);
                }
            }
            catch (Exception E)
            {
                ShowAlarmAndClose(E.Message);
            }

            //Setup the CEF Folder
            var settings = new CefSettings();

            if (Config.ClientConfig.RenderingMethod == Constants.Rendering.CPU)
                settings.CefCommandLineArgs.Add("--disable-gpu");

            settings.CefCommandLineArgs.Add("--enable-transparent-visuals");
            settings.CefCommandLineArgs.Add("--disable-pinch");
            settings.CefCommandLineArgs.Add("--enable-media-stream");
            settings.CefCommandLineArgs.Add("--enable-usermedia-screen-capture");
            settings.CefCommandLineArgs.Add("--no-proxy-server");
            settings.CefCommandLineArgs.Add("--ignore-certificate-errors-spki-list");
            settings.CefCommandLineArgs.Add("--ignore-ssl-errors");
            CefSharpSettings.FocusedNodeChangedEnabled = true;
            CefSharpSettings.LegacyJavascriptBindingEnabled = true;

            settings.LogSeverity = LogSeverity.Fatal;
            settings.CachePath = Constants.BROWSER_CACHE_FOLDER;


            //Initialize Cef
            try
            {
                Cef.Initialize(settings);
            }
            catch (Exception E)
            {
                ShowAlarmAndClose(E.Message);
            }
        }

        #region CONFIG_METHODS

        //Sub-Method used to read the configuration
        static private void readConfiguration()
        {
            //Read the Config
            try
            {
                ConfigController.ReadStartupConfig();
            }
            catch (Exception E)
            {
                ShowAlarmAndClose(E.Message);
            }
        }

        static private void checkGraphicCard()
        {

            ManagementObjectSearcher VideoCardsQuery = new ManagementObjectSearcher("root\\CIMV2", "SELECT * FROM Win32_VideoController");
            ManagementObjectCollection VideoCards = VideoCardsQuery.Get();
            //Check if i have more Cards
            if (VideoCards.Count > 1)
            {
                //Prepare List of Cards
                String Cardlist = "";
                foreach (ManagementObject card in VideoCards)
                {
                    Cardlist = Cardlist + "  - " + card["Name"] + "\n";
                }

                //If is Win 10 check the Registry Key
                if (Environment.OSVersion.Version.Major == 10)
                {
                    string keyName = @"HKEY_CURRENT_USER\Software\Microsoft\DirectX\UserGpuPreferences";
                    string valueName = System.Reflection.Assembly.GetExecutingAssembly().Location;
                    Object value = Registry.GetValue(keyName, valueName, null);
                    if (value == null || !value.Equals("GpuPreference=1;"))
                    {
                        //code if key Not Exist add it and restart
                        Registry.SetValue(keyName, valueName, "GpuPreference=1;");
                        MessageBox.Show("Active has foundthis Graphic Cards:\n\n" + Cardlist + "\nThe graphic configuration has been setted. Press Ok to restart the Application", Application.ProductName);
                        Application.Restart();
                        Environment.Exit(0);
                    }
                }
            }
        }
        #endregion


        private static void GeneralExMethod(object sender, UnhandledExceptionEventArgs args)
        {
            Exception e = (Exception)args.ExceptionObject;

            //Create Directory 
            if (!Directory.Exists(Client.Utils.Constants.CEF_EXCEPTIONLOG_PATH))
                Directory.CreateDirectory(Constants.CEF_EXCEPTIONLOG_PATH);

            //Log the exception on File
            string path = Constants.CEF_EXCEPTIONLOG_PATH + @"\" + DateTime.Now.ToString("yyyy_MM_dd") + @".txt";
            using (StreamWriter sw = File.AppendText(path))
                sw.WriteLine(DateTime.Now.ToString("HH:mm:ss") + " | Class.Name: " + e.TargetSite.ReflectedType.Name + " | Method.Name: " + e.TargetSite.Name + " | Error: " + e.Message);
            
        }


        //Method Used to Show an alarm and close the application
        public static void ShowAlarmAndClose(string Message)
        {
            MessageBox.Show(Message,
                                Application.ProductName,
                                MessageBoxButtons.OK,
                                MessageBoxIcon.Error,
                                MessageBoxDefaultButton.Button1
                            );
            Environment.Exit(-1);
        }
    }
}