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

namespace SPC.Kiosk.Base
{
    /// <summary>
    /// Commad Interfase Implementation 
    /// </summary>
    public class Command : ICommand
    {
        private readonly Action<object> _handler;
        private bool _isEnabled;

        /// <summary>
        /// Set Commad Handler
        /// </summary>
        /// <param name="handler"></param>
        public Command(Action<object> handler)
        {
            _handler = handler;
            IsEnabled = true;
        }
        /// <summary>
        /// CanExecut Is Enabled
        /// </summary>
        public bool IsEnabled
        {
            get { return _isEnabled; }
            set
            {
                if (value != _isEnabled)
                {
                    _isEnabled = value;
                    CanExecuteChanged?.Invoke(this, EventArgs.Empty);
                }
            }
        }
        /// <summary>
        /// CanExecute Status Return
        /// </summary>
        /// <param name="parameter"></param>
        /// <returns></returns>
        public bool CanExecute(object parameter)
        {
            return IsEnabled;
        }
        /// <summary>
        /// CanExecuteChanged EventHandler
        /// </summary>
        public event EventHandler CanExecuteChanged;
        /// <summary>
        /// Execute with parameter
        /// </summary>
        /// <param name="parameter"></param>
        public void Execute(object parameter)
        {
            IsEnabled = false;
            _handler(parameter);
            IsEnabled = true;
        }
        /// <summary>
        /// Execute with out parameter
        /// </summary>
        public void Execute()
        {
            IsEnabled = false;
            _handler(null);
            IsEnabled = true;
        }
    }
}