using LFlow.InternalEventBus.Interface;
using System.Collections.Concurrent;

namespace LFlow.InternalEventBus
{
    public class InternalEventBus
    {
        private static readonly ConcurrentDictionary<string, List<IInternalEventSubscriber>> _eventSubscriberDict = new();
        /// <summary>
        /// 注册事件
        /// </summary>
        /// <param name="eventName"></param>
        /// <param name="subscriber"></param>
        public static void Register(string eventName, IInternalEventSubscriber subscriber)
        {
            if (!_eventSubscriberDict.ContainsKey(eventName))
            {
                _eventSubscriberDict.TryAdd(eventName, []);
            }
            _eventSubscriberDict[eventName].Add(subscriber);
        }
        /// <summary>
        /// 取消注册事件
        /// </summary>
        /// <param name="eventName"></param>
        /// <param name="subscriber"></param>
        public static void UnRegister(string eventName, IInternalEventSubscriber subscriber)
        {
            if (_eventSubscriberDict.ContainsKey(eventName))
            {
                _eventSubscriberDict[eventName].Remove(subscriber);
            }
        }
        /// <summary>
        /// 发布事件
        /// </summary>
        /// <param name="eventName"></param>
        /// <param name="data"></param>
        /// <returns></returns>
        public static async void Publish(string eventName, object data)
        {
            if (_eventSubscriberDict.ContainsKey(eventName))
            {
                foreach (var subscriber in _eventSubscriberDict[eventName].OrderBy(i => i.Priority))
                {
                    var isContinue = await subscriber.Handle(data);
                    if (!isContinue)
                    {
                        return;
                    }
                }
            }
        }
        /// <summary>
        /// 发布事件
        /// </summary>
        /// <param name="eventName"></param>
        /// <param name="data"></param>
        /// <returns></returns>
        public static async Task PublishAsync(string eventName, object data)
        {
            Task.Factory.StartNew(() => Publish(eventName, data));
        }



    }
}