using Gma.System.MouseKeyHook;
using NLog;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace POSV.Utils
{
    public class KeyboardUtils
    {
        private Logger logger = NLog.LogManager.GetCurrentClassLogger();

        private IKeyboardMouseEvents _events;

        private static object _lock = new object();

        private static KeyboardUtils _instance = null;

        private KeyboardUtils()
        {
            this._events = Hook.AppEvents();
        }

        public static KeyboardUtils Instance
        {
            get
            {
                if (_instance == null)
                {
                    lock (_lock)
                    {
                        _instance = new KeyboardUtils();
                    }
                }

                return _instance;
            }
        }
        
        public void RegisterHook(KeyEventHandler appHookKeyDown)
        {
            this.RegisterHook(appHookKeyDown,"注册键盘事件");
        }

        public void RegisterHook(KeyEventHandler appHookKeyDown,string message)
        {
            this._events.KeyDown += appHookKeyDown;

            logger.Debug(message);
        }


        public void UnRegisterHook(KeyEventHandler appHookKeyDown)
        {
            this.UnRegisterHook(appHookKeyDown , "卸载键盘事件");
        }

        public void UnRegisterHook(KeyEventHandler appHookKeyDown , string message)
        {
            this._events.KeyDown -= appHookKeyDown;

            logger.Debug(message);
        }

        
    }
}