using System;
using System.Configuration;
using System.Diagnostics;
using System.IO;
using System.Security.Principal;
using System.Windows;

namespace ShanghaiEnvironmentalTechnology
{
    public partial class App : Application
    {
        public App()
        {
            // 捕获UI线程异常
            DispatcherUnhandledException += App_DispatcherUnhandledException;
            // 捕获非UI线程异常
            AppDomain.CurrentDomain.UnhandledException += CurrentDomain_UnhandledException;
            // 捕获任务线程异常
            System.Threading.Tasks.TaskScheduler.UnobservedTaskException += TaskScheduler_UnobservedTaskException;
        }
         
        private void App_DispatcherUnhandledException(object sender, System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e)
        {
            LogError(e.Exception, "UI线程异常");
            e.Handled = true; // 标记为已处理，避免崩溃（仅用于调试）
        }

        private void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
        {
            if (e.ExceptionObject is Exception ex)
                LogError(ex, "应用域未处理异常");
        }

        private void TaskScheduler_UnobservedTaskException(object sender, System.Threading.Tasks.UnobservedTaskExceptionEventArgs e)
        {
            LogError(e.Exception, "任务线程异常");
            e.SetObserved();
        }

        private void LogError(Exception ex, string type)
        {
            string logPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "error.log");
            string logContent = $"[{DateTime.Now:yyyy-MM-dd HH:mm:ss}] {type}：\n{ex.ToString()}\n\n";
            File.AppendAllText(logPath, logContent);
            MessageBox.Show($"发生错误，详情已记录到 {logPath}", "错误");
        }

        protected override void OnStartup(StartupEventArgs e)
        {
            base.OnStartup(e);

            if (!IsRunAsAdmin())
            {
                RestartAsAdmin();
                Shutdown();
            }

            // 加载保存的语言
            string savedLanguage = ConfigurationManager.AppSettings["Language"] ?? "zh-CN";
            var resourceDict = new ResourceDictionary
            {
                Source = new Uri($"/Resources/Strings.{savedLanguage}.xaml", UriKind.Relative)
            };

            Current.Resources.MergedDictionaries.Clear();
            Current.Resources.MergedDictionaries.Add(resourceDict);

        }

        private bool IsRunAsAdmin()
        {
            WindowsIdentity identity = WindowsIdentity.GetCurrent();
            WindowsPrincipal principal = new WindowsPrincipal(identity);
            return principal.IsInRole(WindowsBuiltInRole.Administrator);
        }

        private void RestartAsAdmin()
        {
            ProcessStartInfo startInfo = new ProcessStartInfo();
            startInfo.UseShellExecute = true;
            startInfo.WorkingDirectory = Environment.CurrentDirectory;
            startInfo.FileName = Process.GetCurrentProcess().MainModule.FileName;
            startInfo.Verb = "runas"; // Run as administrator

            try
            {
                Process.Start(startInfo);
            }
            catch (Exception ex)
            {
                MessageBox.Show("Error: " + ex.Message);
            }
        }
    }
}