using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using LehrerApp.Core.Interfaces;
using LehrerApp.Core.Models;
using LehrerApp.Core.Services;
using LehrerApp.Data;
using LehrerApp.Desktop.Services;
using LehrerApp.Desktop.ViewModels.Planning;
using LehrerApp.Sync;
using LehrerApp.Sync.Crypto;
using System.Collections.ObjectModel;
using System.Globalization;
using System.Security.Cryptography;
using System.Text.Json;
using System.Text.Json.Serialization;

namespace LehrerApp.Desktop.ViewModels.Settings;

public partial class SettingsViewModel
{
    // ── Darstellung (12.4) ──────────────────────────────────────────────────────

    [ObservableProperty] private AppTheme _selectedTheme;
    public string[] ThemeOptions { get; } = AppThemeDisplay.Options;
    public string SelectedThemeName
    {
        get => AppThemeDisplay.Label(SelectedTheme);
        set => SelectedTheme = AppThemeDisplay.FromLabel(value);
    }

    /// Vom Code-Behind gesetzt: wendet die Theme-Variante sofort an (Application.Current, siehe
    /// App.ApplyTheme) — ViewModels fassen Avalonia-Framework-Typen nicht direkt an, gleiches
    /// Muster wie die übrigen Code-Behind-Hooks in dieser Klasse.
    public Action<AppTheme>? OnThemeChanged { get; set; }

    partial void OnSelectedThemeChanged(AppTheme value)
    {
        _appearance.Save(value);
        OnThemeChanged?.Invoke(value);
    }
}