/*
 *   This file is a part of the SteamWar software.
 *
 *   Copyright (C) 2026 SteamWar.de-Serverteam
 *
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU Affero General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *   GNU Affero General Public License for more details.
 *
 *   You should have received a copy of the GNU Affero General Public License
 *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

package de.steamwar;

import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import java.util.logging.Logger;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

public class Utils {

    private static final Logger LOG = Logger.getLogger("AccessWidenerAgent");

    private Utils() {
        throw new IllegalStateException("Utility class");
    }

    public static List<AccessWidenerEntry> findAndParseAccessWideners(Path jarPath) throws IOException {
        List<AccessWidenerEntry> results = new ArrayList<>();

        try (ZipFile zip = new ZipFile(jarPath.toFile())) {
            Enumeration<? extends ZipEntry> entries = zip.entries();
            while (entries.hasMoreElements()) {
                ZipEntry entry = entries.nextElement();
                if (entry.isDirectory() || !entry.getName().endsWith(".accesswidener")) continue;

                try (InputStream in = zip.getInputStream(entry)) {
                    results.addAll(AccessWidenerParser.parse(in));
                } catch (IOException e) {
                    LOG.warning("[AccessWidener] Failed to parse " + entry.getName()
                            + " in " + jarPath.getFileName() + ": " + e.getMessage());
                }
            }
        }

        return results;
    }
}