using System;
using System.Collections.Generic;
using ObjectEventAction = System.Action<CommonAI.Zone.ObjectEvent>;

namespace ET
{
    public class EventDispatcher
    {
        private Dictionary<Type, List<ObjectEventAction>> _list = new();
        public EventDispatcher() { }

        public ObjectEventAction AddListener<T>(ObjectEventAction action)
        {
            List<ObjectEventAction> acts;
            if (_list.TryGetValue(typeof(T), out acts))
            {
                acts.Add(action);
            }
            else
            {
                _list.Add(typeof(T), new List<ObjectEventAction> { action });
            }
            return action;
        }

        public void Notfify(CommonAI.Zone.ObjectEvent ev)
        {
            List<ObjectEventAction> acts;
            if (_list.TryGetValue(ev.GetType(), out acts))
            {
                foreach (var act in acts)
                {
                    act.Invoke(ev);
                }
            }
        }
    }
}