using System.Collections.Generic;
using System.Linq;
using Godot;

namespace BITKit;
/// <summary>
/// 为Godot.Node提供数学工具
/// </summary>
public static partial class MathNode
{
    /// <summary>
    /// 获取Node下所有的子Node节点
    /// </summary>
    /// <param name="self">Root Node</param>
    /// <returns></returns>
    public static IEnumerable<Node> GetAllNode(Node self)
    {
        List<Node> nodes = new() { self };
        For(self);
        void For(Node node)
        {
            foreach (var x in node.GetChildren())
            {
                For(x);
                nodes.Add(x);
            }
        }
        return nodes.Distinct();
    }

    public static void ClearChild(Node self)
    {
        foreach (var x in self.GetChildren())
        {
            x.QueueFree();
        }
    }

    public static T Create<T>(this Node self) where T : Node,new()
    {
        var t = new T();
        self.AddChild(t);
        return t;
    }
}