using Framework;
using System;
using System.Collections.Generic;
using static Framework.EventManager;

public abstract class RedPointNode
{
    private bool _isDisposed;

    protected List<RedPointNode> _children = new();
    //该红点节点需要注册的事件，当事件发生时通知UI刷新数据
    protected abstract EventName[] eventsToRegister { get; }
    //消息数目要重载，去算各自系统对应的消息数
    public abstract int MessageCount { get; }
    public int ID { get; private set; }
    public RedPointNode parent { get; set; }
    public bool Valid => !_isDisposed;

    protected RedPointNode(int id)
    {
        ID = id;
    }

    public void AddChild(RedPointNode child)
    {
        _children.Add(child);
    }

    public void RemoveChild(RedPointNode child)
    {
        _children.Remove(child);
    }

    public void Init()
    {
        RegisterEvents();
    }

    public void Dispose()
    {
        UnRegisterEvents();
        _children = null;
        parent = null;
        _isDisposed = true;
    }

    //如果节点有特殊信号处理的，重写该函数
    protected virtual void RegisterEvents()
    {
        if (eventsToRegister != null)
        {
            foreach (var eveName in eventsToRegister)
            {
                EventManager.Instance.Register(eveName, SendChange);
            }
        }
    }

    //如果节点有特殊信号处理的，重写该函数
    protected virtual void UnRegisterEvents()
    {
        if (eventsToRegister != null)
        {
            foreach (var eveName in eventsToRegister)
            {
                EventManager.Instance.Unregister(eveName, SendChange);
            }
        }
    }

    public void ForeachChild(Action<RedPointNode> func)
    {
        for (int i = _children.Count - 1; i >= 0; i--)
        {
            func(_children[i]);
        }
    }

    public void SendChange()
    {
        EventManager.Instance.Send(EventName.RedPointDataChange, this);
        if (parent != null)
        {
            parent.SendChange();
        }
    }
}