using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class EventCenter : Singleton<EventCenter>
{
	public delegate void EventHandler(params object [] param);

	private Dictionary<EventMsgType, List<EventHandler>> m_EventHandlers = new Dictionary<EventMsgType, List<EventHandler>>();

	public void Register(EventMsgType evt, EventHandler handler)
	{
		List<EventHandler> handlers;
		if (!m_EventHandlers.TryGetValue(evt, out handlers))
		{
			handlers = new List<EventHandler>();
			m_EventHandlers.Add(evt, handlers);
		}
		if (!handlers.Contains(handler))
		{
			handlers.Add(handler);
		}
		else
		{
			Debug.LogError("Event has already registed, eventType=" + evt);
		}
	}

	public void UnRegister(EventMsgType evt, EventHandler handler)
	{
		List<EventHandler> handlers;
		if (m_EventHandlers.TryGetValue(evt, out handlers))
		{
			if(handlers.Contains(handler))
				handlers.Remove(handler);
		}
	}

	public void Publish(EventMsgType evt, params object[] objs)
	{
		List<EventHandler> handlers;
		if (m_EventHandlers.TryGetValue(evt, out handlers))
		{
			handlers.ForEach(h => h(objs));
		}
	}

	public void Publish(EventMsgType evt)
	{
		List<EventHandler> handlers;
		if (m_EventHandlers.TryGetValue(evt, out handlers))
		{
			handlers.ForEach(h => h(null));
		}
	}

}