using System;

namespace ZeroLevel.Services.Semantic.Model
{
    internal class CharTrieNode(char key)
    {
        public char Key { get; } = key;

        public virtual bool IsTerminal => false;

        public CharTrieNode[] Children { get; set; } = [];

        public void AddChild(CharTrieNode node)
        {
            var children = new CharTrieNode[Children.Length + 1];
            Array.Copy(Children, children, Children.Length);
            children[^1] = node;
            Children = children;
        }

        public void RemoveChildAt(int index)
        {
            var children = new CharTrieNode[Children.Length - 1];
            Children[index] = Children[^1];
            Array.Copy(Children, children, children.Length);
            Children = children;
        }

        public void CopyChildren(CharTrieNode[] toCopy)
        {
            Children = new CharTrieNode[toCopy.Length];
            Array.Copy(toCopy, Children, Children.Length);
        }

        public override string ToString() => $"Key: {Key}";
    }
}