package jp.ac.u_ryukyu.ie.cr.shoshi.jungle;

import java.util.Iterator;
import java.util.TreeMap;
import java.util.concurrent.ConcurrentHashMap;

import fj.data.List;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.ChangeList;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.Journal;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.NullJournal;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.ChangeSet;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.TreeEditor;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.DefaultNodePath;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.DefaultTreeEditor;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.TreeNode;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.operations.TreeOperation;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.DefaultChangeSet;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.DefaultTreeContext;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.DefaultTreeNode;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.traverser.DefaultTraverser;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Either;
import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Error;
import jp.ac.u_ryukyu.ie.cr.tatsuki.jungle.store.index.Index;
import jp.ac.u_ryukyu.ie.cr.tatsuki.jungle.store.index.ParentIndex;

public class DefaultJungle implements Jungle
{
	private Journal journal;
	private ConcurrentHashMap<String,JungleTree> trees;
	private String uuid;
	private TreeEditor editor;
	public static void main(String args[])
	{
		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 ConcurrentHashMap<String,JungleTree>();
		this.uuid = uuid;
		this.editor = editor;
	}

	@Override
	public JungleTree getTreeByName(String name)
	{
		return trees.get(name);
	}

	@Override
	public JungleTree createNewTree(final String name)
	{
		ChangeList list = new ChangeList(){
			@Override
			public Iterator<TreeOperation> iterator() {
				List<TreeOperation> nil = List.nil();
				return nil.iterator();
			}
			@Override
			public String uuid() {
				return uuid;
			}
			@Override
			public String getTreeName() {
				return name;
			}
			
		};
		
		DefaultTreeNode root = new DefaultTreeNode();
		 TreeMap<String, TreeMap<String, List<TreeNode>>> indexList = new Index().getIndex();
		 TreeMap<TreeNode, TreeNode> parentIndex = new ParentIndex().getParentIndex();
		ChangeSet set = new DefaultChangeSet(root,null,list,uuid,name,0,indexList,parentIndex);
		DefaultTreeContext tc = new DefaultTreeContext(root,set);
		JungleTree newTree = new DefaultJungleTree(tc,uuid,journal.getWriter(),editor);
		if(trees.putIfAbsent(name,newTree) != null){
			return null;
		}
		return newTree;
	}
}