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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.config;

import edu.umd.cs.findbugs.annotations.NonNull;

import java.io.File;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

/**
 * Represents a 'path' in a {@link ConfigInstance}, usually a filename.
 *
 * @author gjoranv
 * @since 5.1.30
 */
public class PathNode extends LeafNode {

    private final FileReference fileReference;

    public PathNode() {
        fileReference = null;
    }

    public PathNode(FileReference fileReference) {
        super(true);
        this.value = new File(fileReference.value()).toPath();
        this.fileReference = fileReference;
    }

    public Path value() {
        return value;
    }

    @Override
    public String getValue() {
        return value.toString();
    }

    @Override
    public String toString() {
        return (value == null) ? "(null)" : '"' + getValue() + '"';
    }

    @Override
    protected boolean doSetValue(@NonNull String stringVal) {
        throw new UnsupportedOperationException("doSetValue should not be necessary since the library anymore!");
    }

    public FileReference getFileReference() {
        return fileReference;
    }

    public static List toFileReferences(List pathNodes) {
        List fileReferences = new ArrayList<>();
        for (PathNode pathNode : pathNodes)
            fileReferences.add(pathNode.getFileReference());
        return fileReferences;
    }

    public static Map toFileReferenceMap(Map map) {
        Map ret = new LinkedHashMap<>();
        for (Map.Entry e : map.entrySet()) {
            ret.put(e.getKey(), e.getValue().getFileReference());
        }
        return ret;
    }

}