using HMI.Core.Entity;
using System;
using System.Collections.Generic;

namespace HMI.Core.Api
{
    public class AlarmShowHelper
    {
        private static List<IAlarmHandler> handlers;

        private static IAlarmShow shower;

        public static void Register(IAlarmShow shower)
        {
            if (AlarmShowHelper.shower == null)
            {
                AlarmShowHelper.shower = shower;
            }
        }

        public static void UnRegister(IAlarmShow shower)
        {
            if (AlarmShowHelper.shower == shower)
            {
                AlarmShowHelper.shower = null;
            }
        }

        public static void AddHandler(IAlarmHandler handler)
        {
            if (handlers == null)
            {
                handlers = new List<IAlarmHandler>();
            }
            if (!handlers.Contains(handler))
            {
                handlers.Add(handler);
            }
        }

        public static bool ShowAlarm(AlarmText alarm)
        {
            if (handlers != null)
            {
                foreach (var handler in handlers)
                {
                    try
                    {
                        handler.HandleAlarm(alarm);
                    }
                    catch (Exception ex)
                    {

                    }
                }
            }

            if (shower != null)
            {
                return shower.ShowAlarm(alarm);
            }
            return false;
        }
    }
}