using HMI.Core.Setting;
using HMI.Core.Util;
using HMI.UI.Util;
using log4net;
using Microsoft.Win32;
using Panuon.WPF.UI;
using System;
using System.Diagnostics;
using System.IO;
using System.Management;
using System.Reflection;
using System.Threading;
using System.Windows;
using WPFProject.Utils;

namespace WPFProject
{
    /// <summary>
    /// App.xaml 的交互逻辑
    /// </summary>
    public partial class App : Application
    {
        private ILog log;
        private LogCleanner logCleanner;
        public App()
        {
            log = LogManager.GetLogger("APP");
            AppDomain.CurrentDomain.UnhandledException += CurrentDomain_UnhandledException;
        }

        private void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
        {
            var ex = e.ExceptionObject as Exception;
            log.Error("UnhandledException.", ex);
            MsgBoxHelper.ErrorMessage(Current.MainWindow, this.lang("App.AppUnhandledException", ex.Message),
                    this.lang("App.Error"), MessageBoxButton.OK,
                    MessageBoxIcon.Error, DefaultButton.YesOK, 5);
        }

        public static Process GetProcess()
        {
            Process cur = Process.GetCurrentProcess();
            string exePath = Assembly.GetExecutingAssembly().Location;
            string query = $"SELECT ProcessId FROM Win32_Process WHERE ExecutablePath = '{exePath.Replace("\\", "\\\\")}'";
            using (var searcher = new ManagementObjectSearcher(query))
            {
                foreach (var obj in searcher.Get())
                {
                    int processId = Convert.ToInt32(obj["ProcessId"]);
                    if (processId != cur.Id)
                    {
                        return Process.GetProcessById(processId);
                    }
                }
            }
            return null;
        }

        /// <summary>
        /// 启动后往注册表写点东西
        /// </summary>
        private void WriteRegister()
        {
            string Company = "JingCe", Program = "HMI";
            try
            {
                string registryPath = @$"SOFTWARE\{Company}\{Program}";

                using RegistryKey key = Registry.CurrentUser.CreateSubKey(registryPath, true)
                    ?? throw new Exception("无法创建或打开注册表键");
                string path = AppDomain.CurrentDomain.BaseDirectory;
                key.SetValue("Location", path, RegistryValueKind.String);
            }
            catch (Exception ex)
            {
                log.Error("Write Register Failed.", ex);
            }
        }

        private void DoUpdateAction()
        {
            using (SqliteHelper helper = new SqliteHelper(PathHelper.DatabasePath))
            {
                if (!helper.HasData("SELECT 1 FROM pragma_table_info('user') WHERE name = 'code';"))
                {
                    helper.ExecuteSql("ALTER TABLE user ADD code TEXT;");
                }
            }
        }

        private static Mutex mutex;
        private void Application_Startup(object sender, StartupEventArgs e)
        {
            var process = GetProcess();

            mutex = new Mutex(true, "TestPlatform_OnlyRun_CRNS");
            if (mutex.WaitOne(0, false))//&& process == null
            {
                WriteRegister();
                try
                {
                    DoUpdateAction();
                }
                catch (Exception ex) {
                    log.Error("Update Failed.", ex);
                }

                logCleanner = new LogCleanner();
                AppDomain.CurrentDomain.AssemblyResolve += CurrentDomain_AssemblyResolve;
                LoggerHelper.Register(new CommonLogger());
                LangUtil.Load();
                SystemSetting.SystemSettingChanged += SystemSetting_SystemSettingChanged;
                ToastHelper.Register(new MainToastHandler());
                //LoadingWindow window = new LoadingWindow();
                Login window = new Login();
                window.Show();
            }
            else
            {
                MessageBox.Show("程序已经在运行！", "提示");
                this.Shutdown();
            }
        }

        private Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args)
        {
            // 获取请求加载的程序集名称
            string assemblyName = new AssemblyName(args.Name).Name;

            string[] dirs = new string[] { "3rds", "Libs" };

            foreach (string dir in dirs)
            {
                string dllPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, dir, $"{assemblyName}.dll");
                if (File.Exists(dllPath))
                {
                    // 如果依赖 DLL 存在，则加载并返回它
                    return Assembly.LoadFrom(dllPath);
                }
            }
            // 否则返回 null
            return null;
        }

        private void SystemSetting_SystemSettingChanged(object sender, SystemSetting e)
        {
            LangUtil.LoadLang();
        }
    }
}