using System.ComponentModel;
using System.Runtime.CompilerServices;
using System.Windows.Input;

namespace CVRManager.ViewModels;

public abstract class ObservableObject : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler? PropertyChanged;

    protected bool Set<T>(ref T field, T value, [CallerMemberName] string? name = null)
    {
        if (EqualityComparer<T>.Default.Equals(field, value)) return false;
        field = value;
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
        return true;
    }

    protected void Raise([CallerMemberName] string? name = null) =>
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
}

public class RelayCommand : ICommand
{
    readonly Func<Task> run;

    public RelayCommand(Func<Task> run) => this.run = run;
    public RelayCommand(Action run) => this.run = () => { run(); return Task.CompletedTask; };

    public event EventHandler? CanExecuteChanged { add { } remove { } }
    public bool CanExecute(object? parameter) => true;
    public async void Execute(object? parameter) => await run();
}