using System.Windows.Input;

namespace SHH.CameraDashboard;

// ===========================================================================
// 1. 新增：非泛型 RelayCommand (支持 new RelayCommand(Method, Check))
// ===========================================================================
public class RelayCommand : ICommand
{
    private readonly Action<object> _execute;
    private readonly Predicate<object> _canExecute;

    public RelayCommand(Action<object> execute, Predicate<object> canExecute = null)
    {
        _execute = execute ?? throw new ArgumentNullException(nameof(execute));
        _canExecute = canExecute;
    }

    public bool CanExecute(object parameter)
    {
        return _canExecute == null || _canExecute(parameter);
    }

    public void Execute(object parameter)
    {
        _execute(parameter);
    }

    public event EventHandler CanExecuteChanged
    {
        add => CommandManager.RequerySuggested += value;
        remove => CommandManager.RequerySuggested -= value;
    }
}

// ===========================================================================
// 2. 保留：泛型 RelayCommand<T> (支持 new RelayCommand<string>(Method...))
// ===========================================================================
public class RelayCommand<T> : ICommand
{
    private readonly Action<T> _execute;
    private readonly Predicate<T> _canExecute;

    public RelayCommand(Action<T> execute, Predicate<T> canExecute = null)
    {
        _execute = execute ?? throw new ArgumentNullException(nameof(execute));
        _canExecute = canExecute;
    }

    public bool CanExecute(object parameter)
    {
        return _canExecute == null || _canExecute((T)parameter);
    }

    public void Execute(object parameter)
    {
        _execute((T)parameter);
    }

    public event EventHandler CanExecuteChanged
    {
        add => CommandManager.RequerySuggested += value;
        remove => CommandManager.RequerySuggested -= value;
    }
}