using SC.XR.Unity;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class EventManager : SingletonMono<EventManager>
{
    private Dictionary<EventID, List<EventObserver>> m_ObserList = new Dictionary<EventID, List<EventObserver>>();
    private Queue m_Quene = new Queue();


    private void Update()
    {
        while (m_Quene.Count > 0)
        {
            EventData data = (EventData)m_Quene.Dequeue();
            if (!m_ObserList.ContainsKey(data.ID))
            {
                continue;
            }

            List<EventObserver> observers = m_ObserList[data.ID];
            for (int i = 0; i < observers.Count; i++)
            {
                if (observers[i] == null)
                {
                    continue;
                }
                observers[i].HandleEvent(data);
            }
        }
    }

    //发送事件
    public void SendEvent(EventData eve)
    {
        m_Quene.Enqueue(eve);
    }

    /// <summary>
    /// 添加监听者 
    /// </summary>
    /// <param name="newobj">监听者</param>
    /// <param name="eid">监听的事件</param>
    private void RegisterObj(EventObserver newobj, EventID eid)
    {
        if (!m_ObserList.ContainsKey(eid))
        {
            List<EventObserver> list = new List<EventObserver>();
            list.Add(newobj);
            m_ObserList.Add(eid, list);
        }
        else
        {
            List<EventObserver> list = m_ObserList[eid];
            foreach (EventObserver obj in list)
            {
                if (obj == newobj)
                {
                    return;
                }
            }
            list.Add(newobj);
        }
    }


    /// <summary>
    /// 移除监听者
    /// </summary>
    /// <param name="removeobj">监听者</param>
    private void RemoveObj(EventObserver removeobj)
    {
        foreach (KeyValuePair<EventID, List<EventObserver>> kv in m_ObserList)
        {
            List<EventObserver> list = kv.Value;
            foreach (EventObserver obj in list)
            {
                if (obj == removeobj)
                {
                    list.Remove(obj);
                    break;
                }
            }
        }
    }

    /// <summary>    
    /// 移除一个监听者  
    /// </summary> 
    ///  <param name="removeobj">监听者</param>	
    public void Remove(EventObserver removeobj)
    {
        if (EventManager.Instance == null) return;
        EventManager.Instance.RemoveObj(removeobj);
    }

    /// <summary>    
    ///  监听者在这里注册  
    ///  </summary>   
    /// <param name="newobj">监听者</param>  
    /// <param name="eids">需要监听的事件列表.</param>
    public void Register(EventObserver newobj, params EventID[] eids)
    {
        if (EventManager.Instance == null) return;
        foreach (EventID eid in eids)
        {
            EventManager.Instance.RegisterObj(newobj, eid);
        }
    }

    private void on()
    {
        //m_Quene.Clear();
    }

    private void OnApplicationQuit()
    {
        m_ObserList.Clear();
    }
}

public enum EventID
{
    /// <summary>
    /// 选中素材时触发事件
    /// </summary>
    EVENT_1 = 10001,

    EVENT_2 = 10002,
    /// <summary>
    ///  选中锚点
    /// </summary>
    EVENT_3 = 10003,
}


public interface EventObserver
{
    void HandleEvent(EventData resp);
}