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

namespace ToolKit
{
    public class BaseViewModel : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler PropertyChanged;

        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = "") =>
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));

        protected virtual void SetProperty<T>(
            ref T backingStore,
            T value,
            [CallerMemberName] string propertyName = "",
            Action onChanged = null
        )
        {
            if (EqualityComparer<T>.Default.Equals(backingStore, value))
                return;

            backingStore = value;
            onChanged?.Invoke();
            OnPropertyChanged(propertyName);
        }
    }
}