/*
 * JBoss, Home of Professional Open Source
 * Copyright 2009, Red Hat Middleware LLC, and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jboss.shrinkwrap.api.formatter;

import org.jboss.shrinkwrap.api.Archive;
import org.jboss.shrinkwrap.api.Node;

/**
 * {@link Formatter} implementation to provide an "ls -l"-esque output for an {@link Archive}, listing all internal
 * contents in sorted order
 *
 * @author <a href="mailto:andrew.rubinger@jboss.org">ALR</a>
 * @version $Revision: $
 */
enum VerboseFormatter implements Formatter {
    INSTANCE;

    // -------------------------------------------------------------------------------------||
    // Class Members ----------------------------------------------------------------------||
    // -------------------------------------------------------------------------------------||

    /**
     * Root character "/"
     */
    private static final String ROOT = "/";

    // -------------------------------------------------------------------------------------||
    // Required Implementations -----------------------------------------------------------||
    // -------------------------------------------------------------------------------------||

    @Override
    public String format(final Archive<?> archive) throws IllegalArgumentException {
        // Precondition checks
        if (archive == null) {
            throw new IllegalArgumentException("archive must be specified");
        }

        // Start the output with the name of the archive
        StringBuilder sb = new StringBuilder(archive.getName()).append(FormattingConstants.COLON).append(
            FormattingConstants.NEWLINE);

        // format recursively, except the parent
        Node rootNode = archive.get(ROOT);
        for (Node child : rootNode.getChildren()) {
            format(sb, child);
        }

        // remove the last NEWLINE
        sb.deleteCharAt(sb.length() - 1);

        return sb.toString();
    }

    private void format(StringBuilder sb, Node node) {
        sb.append(node.getPath().get());
        if (node.getAsset() == null) {
            sb.append(FormattingConstants.SLASH);
        }

        sb.append(FormattingConstants.NEWLINE);

        for (Node child : node.getChildren()) {
            format(sb, child);
        }
    }

}