using System.ComponentModel;
using System.Runtime.CompilerServices;
using ReactiveUI;

namespace EinmaleinsTrainer.ViewModels;

public class ViewModelBase : IReactiveObject
{
    public event PropertyChangedEventHandler? PropertyChanged;
    public event PropertyChangingEventHandler? PropertyChanging;

    public void RaisePropertyChanged(PropertyChangedEventArgs args)
    {
        PropertyChanged?.Invoke(this, args);
    }

    public void RaisePropertyChanging(PropertyChangingEventArgs args)
    {
        PropertyChanging?.Invoke(this, args);
    }

    protected void OnPropertyChanged([CallerMemberName] string? propertyName = null)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }

    protected void OnPropertyChanging([CallerMemberName] string? propertyName = null)
    {
        PropertyChanging?.Invoke(this, new PropertyChangingEventArgs(propertyName));
    }

    protected bool SetProperty<T>(ref T field, T value, [CallerMemberName] string? propertyName = null)
    {
        if (Equals(field, value)) return false;
        OnPropertyChanging(propertyName);
        field = value;
        OnPropertyChanged(propertyName);
        return true;
    }
}