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

public class DefaultJungle : Jungle {
	private Journal journal;
	private Dictionary<string, JungleTree> trees;
	private string uuid;
	private TreeEditor editor;

	public void Start(){
		DefaultJungle j = new DefaultJungle(null, "hoge", new DefaultTreeEditor(new DefaultTraverser()));
		JungleTree t = j.createNewTree ("fuga");

		JungleTreeEditor e1 = t.getTreeEditor ();

		DefaultNodePath root = new DefaultNodePath ();
		Either<Error, JungleTreeEditor> either = e1.addNewChildAt (root, 0);
		e1 = either.b();
		either = e1.addNewChildAt (root.add (0), 0);
		e1 = either.b ();
		e1.success ();
	}

	public DefaultJungle(Journal journal, string uuid, TreeEditor editor){
		this.journal = new NullJournal();
		this.trees = new Dictionary <string, JungleTree>();
		this.uuid = uuid;
		this.editor = editor;
	}


	public JungleTree getTreeByName(string name) {
		
		JungleTree j = trees[name];
		if (j != null) {
			return trees [name];
		} else {
			return null;
		}
	}

	public JungleTree createNewTree(string name) {
		ChangeList list = new InnerChangeList(uuid,name);
		// Debug.Log( list.getTreeName ());

		DefaultTreeNode root = new DefaultTreeNode ();
		InterfaceTraverser traverser = new InterfaceTraverser (root, true);
		TreeContext tc = new DefaultTreeContext (root, null, list, uuid, name, 0, traverser);
		JungleTree newTree = new DefaultJungleTree (tc, uuid, journal.getWriter (), editor);
		trees.Add (name, newTree);
		// Trees.getValue => nullの時　ここはどう書けば？
//		if (trees.TryGetValue (name, newTree) != null) {
//			return null;
//		}
		return newTree;
	}

	public class InnerChangeList : ChangeList {

		string uuid;
		string name;


		IEnumerator IEnumerable.GetEnumerator()
		{
			return this.GetEnumerator();
		}
			
		public IEnumerator<TreeOperation> GetEnumerator()
		{
			return iterator ();
		}

		// construct
		public InnerChangeList(string _uuid, string _name) {
			this.uuid = _uuid;
			this.name = _name;
		}

		public IEnumerator<TreeOperation> iterator() {
			List<TreeOperation> nil = new List<TreeOperation>();
			return nil.iterator();
		}

		public string uuids() {
			return uuid;
		}

		public string getTreeName() {
			return name;
		}

		public TreeOperationLog getLog() {
			return new DefaultTreeOperationLog();
		}
	}


}