package jp.ac.u_ryukyu.ie.cr.jungle.transaction.editor.treeEditor;

import jp.ac.u_ryukyu.ie.cr.jungle.store.logger.LoggingNode;
import jp.ac.u_ryukyu.ie.cr.jungle.store.nodepath.NodePath;
import jp.ac.u_ryukyu.ie.cr.jungle.store.trasnformer.NodeEditor;
import jp.ac.u_ryukyu.ie.cr.jungle.transaction.node.TreeNode;
import jp.ac.u_ryukyu.ie.cr.jungle.traverser.DefaultEvaluator;
import jp.ac.u_ryukyu.ie.cr.jungle.traverser.Evaluator;
import jp.ac.u_ryukyu.ie.cr.jungle.traverser.Traversal;
import jp.ac.u_ryukyu.ie.cr.jungle.traverser.Traverser;
import jp.ac.u_ryukyu.ie.cr.jungle.util.DefaultEither;
import jp.ac.u_ryukyu.ie.cr.jungle.util.Either;
import jp.ac.u_ryukyu.ie.cr.jungle.util.jungleError.Error;

public class DifferenceTreeEditor implements TreeEditor {
    private Traverser traverser;

    public DifferenceTreeEditor(Traverser traverser) {
        this.traverser = traverser;
    }

    @Override
    public Either<Error, LoggingNode> edit(TreeNode subTreeRoot,  NodePath path, NodeEditor editor) {
        Evaluator evalutor = new DefaultEvaluator(path);
        Either<Error,Traversal> traverseEither =  traverser.traverse(subTreeRoot, evalutor);
        if (traverseEither.isA()) {
            return DefaultEither.newA(traverseEither.a());
        }
        Traversal traversal = traverseEither.b();
        TreeNode target = traversal.destination();
         return editor.edit(target);
    }
}