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

namespace JungleDB {
	public class DefaultTreeNodeAttribute : TreeNodeAttributes {
		public List<TreeNode> children;
		public TreeMap<string, byte[]> attrs;

		public DefaultTreeNodeAttribute(List<TreeNode> _children, TreeMap<string, byte[]> _attrs){
			children = _children;
			attrs = _attrs;
		}

		public TreeMap<string, byte[]> getAttributesAsRawMap(){
			return attrs;
		}

		public Either<Error, TreeNode> delete(string _key) {
			if (_key == null) {
				return DefaultEither<Error,TreeNode>.newA (NodeEditorError.NULL_VALUE_NOT_ALLOWED);
			}

			if (null == attrs.getRoot()) {
				return DefaultEither<Error,TreeNode>.newA(NodeEditorError.DELETE_KEY_NOT_FOUND);
			}

			TreeMap<string, byte[]> newMap = attrs.delete(_key);
			TreeNode newNode = new DefaultTreeNode(children, newMap);
			return DefaultEither<Error,TreeNode>.newB(newNode);
		}

		public Either<Error, TreeNode> put(string _key, byte[] _value){
			if (_key == null || _value == null) {
				return DefaultEither<Error, TreeNode>.newA (NodeEditorError.NULL_VALUE_NOT_ALLOWED);
			}

			TreeMap<string, byte[]> newMap = attrs.put (_key, _value);

			TreeNode newNode = new DefaultTreeNode (children, newMap);

			return DefaultEither<Error, TreeNode>.newB (newNode);
		}

		public byte[] get(string _key) {
			if (_key == null)
				return new byte[1]{0};
			
			byte[] op = attrs.get(_key);
			if (op != null)
				return op;
			return new byte[1]{0};
		}

		public string getString(string key) {
			return Encoding.UTF8.GetString (attrs.get (key));
		}

		public IEnumerator<string> getKeys(){
			return attrs.keys ();
		}

	}
}