using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Input;

namespace SmartAquaViewer.Controls
{
    public class RelayCommand : ICommand
    {
        private readonly Action<object> _execute;
        private readonly Func<object, bool> _canExecute;
        public RelayCommand(Action<object> execute, Func<object, bool> canExecute = null)
        {
            _execute = execute ?? throw new ArgumentNullException(nameof(execute));
            _canExecute = canExecute;
        }

        public bool CanExecute(object parameter) => _canExecute?.Invoke(parameter) ?? true;
        public void Execute(object parameter) => _execute(parameter);

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

    public class RelayCommand<T> : ICommand
    {
        private readonly Action<T> _execute;
        private readonly Func<T, bool>? _canExecute;

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

        public bool CanExecute(object? parameter)
        {
            return _canExecute?.Invoke((T)parameter!) ?? true;
        }

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

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