using System;
using System.Collections.Generic;

namespace Admin.Core.EventBus
{
    /// <summary>
    /// 事件总线订阅管理器
    /// 接口
    /// </summary>
    public interface IEventBusSubscriptionsManager
    {
        bool IsEmpty { get; }
        event EventHandler<string> OnEventRemoved;
        void AddDynamicSubscription<TH>(string eventName)
           where TH : IDynamicIntegrationEventHandler;

        void AddSubscription<T, TH>()
           where T : IntegrationEvent
           where TH : IIntegrationEventHandler<T>;

        void RemoveSubscription<T, TH>()
             where TH : IIntegrationEventHandler<T>
             where T : IntegrationEvent;
        void RemoveDynamicSubscription<TH>(string eventName)
            where TH : IDynamicIntegrationEventHandler;

        bool HasSubscriptionsForEvent<T>() where T : IntegrationEvent;
        bool HasSubscriptionsForEvent(string eventName);
        Type GetEventTypeByName(string eventName);
        void Clear();
        IEnumerable<SubscriptionInfo> GetHandlersForEvent<T>() where T : IntegrationEvent;
        IEnumerable<SubscriptionInfo> GetHandlersForEvent(string eventName);
        string GetEventKey<T>();
    }

}