using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using XRTool.Util;

public class ConfigModel : UnitySingleton<ConfigModel>
{
    /// <summary>
    /// 存储菜单项数据（链表结构）
    /// </summary>
    CircleList<RoomConfig> _itemLinklist = new CircleList<RoomConfig>();


    /// <summary>
    /// 获取头节点（第一个数据）
    /// </summary>
    /// <returns></returns>
    public DoubleLinkNode<RoomConfig> GetFirstMenuItem()
    {
        return _itemLinklist.First;
    }


    /// <summary>
    /// 获取尾节点（最后一个数据）
    /// </summary>
    /// <returns></returns>
    public DoubleLinkNode<RoomConfig> GetLastMenuItem()
    {
        return _itemLinklist.Last;
    }


    /// <summary>
    /// 添加数据
    /// </summary>
    public void AddElement(RoomConfig itemConfig)
    {
        if (itemConfig.Id == "")
        {
            _itemLinklist.AddNode(itemConfig);
        }
        else
        {
            DoubleLinkNode<RoomConfig> _node = _itemLinklist.First;
            while (_node.PreNode != _itemLinklist.First)
            {
                if (_node.Value.Id == "")
                {
                    _node.Value = itemConfig;
                    break;
                }
            }
        }
    }


    /// <summary>
    /// 读取数据
    /// </summary>
    /// <param name="itemConfig"></param>
    public void InitElement(RoomConfig itemConfig)
    {
        _itemLinklist.AddNode(itemConfig);
    }


    /// <summary>
    /// 删除指定的节点
    /// </summary>
    /// <param name="ic"></param>
    public void RemoveElement(DoubleLinkNode<RoomConfig> ic)
    {
        _itemLinklist.RemoveNode(ic);
    }


    /// <summary>
    /// 数据的数量
    /// </summary>
    /// <returns></returns>
    public int Count
    {
        get
        {
            return _itemLinklist.Count;
        }
    }


    /// <summary>
    /// 清除所有数据
    /// </summary>
    public void Clear()
    {
        _itemLinklist.Clear();   
    }
}