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

namespace ProjectBase.Event
{
    public delegate void EventHandler(BaseEventData eventData);

    public class EventCenter : BaseManager<EventCenter>
    {
        public const int Infinity = 999999;

        private Dictionary<string, EventHandlerItem> eventsDic = new Dictionary<string, EventHandlerItem>();

        /// <summary>
        /// 添加事件
        /// </summary>
        /// <param name="key"></param>
        /// <param name="handler"></param>
        /// <param name="time"></param>
        /// <param name="dic"></param>
        public void RegisterEvent(string key, EventHandler handler, int time = Infinity, Dictionary<string, EventHandlerItem> dic = null)
        {
            Dictionary<string, EventHandlerItem> refDic = dic == null ? eventsDic : dic;

            EventHandlerItem eventHandlerItem = null;
            if (eventsDic.TryGetValue(key, out eventHandlerItem))
            {
                eventHandlerItem.AddEventHandler(handler, time);
            }
            else
            {
                eventsDic.Add(key, new EventHandlerItem(key, handler, time));
            }
        }

        /// <summary>
        /// 移除事件
        /// </summary>
        /// <param name="key"></param>
        /// <param name="handler"></param>
        /// <param name="dic"></param>
        public void UnregisterEvent(string key, EventHandler handler,
            Dictionary<string, EventHandlerItem> dic = null)
        {
            Dictionary<string, EventHandlerItem> refDic = dic == null ? eventsDic : dic;

            EventHandlerItem eventHandlerItem = null;
            if (eventsDic.TryGetValue(key, out eventHandlerItem))
            {
                eventHandlerItem.RemoveEventHandler(handler);
            }
        }

        /// <summary>
        /// 触发事件
        /// </summary>
        /// <param name="key"></param>
        /// <param name="dic"></param>
        public void RunEvent(string key, BaseEventData eventData, 
            Dictionary<string, EventHandlerItem> dic = null)
        {
            Dictionary<string, EventHandlerItem> refDic = dic == null ? eventsDic : dic;

            EventHandlerItem eventHandlerItem = null;
            if (eventsDic.TryGetValue(key, out eventHandlerItem))
            {
                eventHandlerItem.EventHandlerTrigger(eventData);
            }
        }

        /// <summary>
        /// 删除
        /// </summary>
        /// <param name="key"></param>
        /// <param name="dic"></param>
        public void DeleteEventByKey(string key,
            Dictionary<string, EventHandlerItem> dic = null)
        {
            Dictionary<string, EventHandlerItem> refDic = dic == null ? eventsDic : dic;

            refDic.Remove(key);
        }

        /// <summary>
        /// 重置
        /// </summary>
        /// <param name="dic"></param>
        public void Reset(Dictionary<string, EventHandlerItem> dic = null)
        {
            Dictionary<string, EventHandlerItem> refDic = dic == null ? eventsDic : dic;

            refDic.Clear();
        }
    }
}