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

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

	public DefaultTreeNodeAttribute(List<TreeNode> _children, TreeMap<string, byte[]> _attrs){
		children = _children; // null?
		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); //null
		if (op != null) {
			return op;
		}
		return new byte[1]{0};
	}

	public string getString(string key, Encoding enc) {
		char[] attribute = key.ToCharArray();
		if (attribute != null){
			return new string(attribute);
		}
		return null;
	}

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

}