using System;
using Avalonia;
using Avalonia.Controls.ApplicationLifetimes;
using Avalonia.Markup.Xaml;
using Project_Periodensystem.Model;
using Project_Periodensystem.Persistence;

namespace Project_Periodensystem.View
{
    public partial class App : Application
    {
        public override void Initialize()
        {
            AvaloniaXamlLoader.Load(this);
        }

        public override void OnFrameworkInitializationCompleted()
        {
            if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
            {
                // Settings laden und Theme setzen
                var settings = DataManager.LoadSettings();
                
                // Theme aus Settings setzen
                if (settings.LastTheme == "Light")
                {
                    RequestedThemeVariant = Avalonia.Styling.ThemeVariant.Light;
                }
                else
                {
                    RequestedThemeVariant = Avalonia.Styling.ThemeVariant.Dark;
                }

                desktop.MainWindow = new MainWindow();
                Logger.Log($"Application initialized with {settings.LastTheme} theme from settings");
                
                // Settings beim Beenden speichern
                desktop.ShutdownMode = Avalonia.Controls.ShutdownMode.OnMainWindowClose;
                desktop.Exit += OnApplicationExit;
            }

            base.OnFrameworkInitializationCompleted();
        }

        /// <summary>
        /// Speichert Settings beim Beenden der App
        /// </summary>
        private void OnApplicationExit(object? sender, ControlledApplicationLifetimeExitEventArgs e)
        {
            try
            {
                var settings = new AppSettings
                {
                    LastTheme = RequestedThemeVariant?.ToString() ?? "Dark",
                    LastUsed = DateTime.Now,
                    PreferredLanguage = "German"
                };
                
                DataManager.SaveSettings(settings);
                Logger.Log("Settings beim App-Exit gespeichert");
            }
            catch (Exception ex)
            {
                Logger.Log($"EXCEPTION in OnApplicationExit: {ex.Message}");
            }
        }
    }
}