using System;
using System.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using System.Windows.Input;

namespace Notes.ViewModels;

public partial class AboutViewModel:ViewModelBase
{
    private readonly IServices _services;
    public string Title => AppInfo.Name;
    public string Version => AppInfo.VersionString;
    public string Message => "This app is written in XAML and C# with Avalonia UI";
    
    [RelayCommand]
    public void ShowAllNotes()
    {
        _services.GetSafeAs<MainViewModel>().Navitation<AllNotesViewModel>();
    }

    [Obsolete("Used by designer",true)]
#pragma warning disable CS8618 
    public AboutViewModel()
#pragma warning restore CS8618
    {
        
    }
    public AboutViewModel(IServices services)
    {
        this._services = services;
    }
}

internal class AppInfo
{
    public static string Name = "Cal Note";
    public static string VersionString = "1.0.0";
}
public class ViewModel1 : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler? PropertyChanged;

    private void OnPropertyChanged(string propName)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propName));
    }


#region SavedValue Property
    private string? _savedValue;
    public string? SavedValue
    {
        get
        {
            return this._savedValue;
        }
        private set
        {
            if (this._savedValue == value)
            {
                return;
            }

            this._savedValue = value;
            this.OnPropertyChanged(nameof(SavedValue));
            this.OnPropertyChanged(nameof(CanSave));
        }
    }
#endregion SavedValue Property


#region NewValue Property
    private string? _newValue;
    public string? NewValue
    {
        get
        {
            return this._newValue;
        }
        set
        {
            if (this._newValue == value)
            {
                return;
            }

            this._newValue = value;
            this.OnPropertyChanged(nameof(NewValue));
            this.OnPropertyChanged(nameof(CanSave));
        }
    }
#endregion NewValue Property

    // CanSave is set to true when SavedValue is not the same as NewView
    // false otherwise
    public bool CanSave => NewValue != SavedValue;

    public void Save()
    {
        SavedValue = NewValue;
    }

    public void Cancel()
    {
        NewValue = SavedValue;
    }
}