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

namespace XED
{
    public class TreeItem
    {
        public TwinObject twinObject;
        //public UI_HierarchyItem View;
        public event Action onDestroyTreeItem;

        public int depth
        {
            get
            {
                TreeItem curr = parent;
                int result = 0;
                while (curr != null)
                {
                    result++;
                    curr = curr.parent;
                }
                return result;
            }
        }
        public List<TreeItem> children = new List<TreeItem>();
        public TreeItem parent;
        public bool expanded = true;
        public event Action<TreeItem> onExpand;
        public event Action<TreeItem> onFold;

        public TreeItem(TwinObject to)
        {
            twinObject = to;
        }

        internal void Add(TreeItem t)
        {
            children.Add(t);
        }

        internal void RemoveChild(TreeItem c)
        {
            children.Remove(c);
        }

        public void OnExpand(bool value)
        {
            expanded = value;
            if (value)
                onExpand?.Invoke(this);
            else
                onFold?.Invoke(this);
        }

        public void DestroyTreeItem()
        {
            onDestroyTreeItem?.Invoke();
        }
    }
}