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/*
 * This file is part of the Yildiz-Engine project, licenced under the MIT License  (MIT)
 *
 *  Copyright (c) 2020-2022 Grégory Van den Borre
 *
 *  More infos available: https://engine.yildiz-games.be
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 *  documentation files (the "Software"), to deal in the Software without restriction, including without
 *  limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 *  of the Software, and to permit persons to whom the Software is furnished to do so,
 *  subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included in all copies or substantial
 *  portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 *  WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
 *  OR COPYRIGHT  HOLDERS BE LIABLE FOR ANY CLAIM,
 *  DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE  SOFTWARE.
 *
 */

package be.yildizgames.common.compression.zip;

import be.yildizgames.common.compression.FileInfo;
import be.yildizgames.common.compression.FileInfoRetriever;
import be.yildizgames.common.hashing.Algorithm;
import be.yildizgames.common.hashing.HashingFactory;

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

/**
 * @author Grégory Van den Borre
 */
public class ZipFileInfoRetriever implements FileInfoRetriever {

    private final Path path;

    public ZipFileInfoRetriever(Path path) {
        super();
        this.path = path;
    }

    @Override
    public final List getFileInfo(Algorithm... algorithms) {
        if (algorithms == null) {
            algorithms = new Algorithm[0];
        }
        var result = new ArrayList();
        try (ZipFile zip = new ZipFile(path.toFile())) {
            for (Enumeration e = zip.entries(); e.hasMoreElements(); ) {
                ZipEntry entry = e.nextElement();
                result.add(new FileInfo(entry.getName(), Arrays.stream(algorithms).map(
                        a -> {
                            try {
                                return HashingFactory.get(a).compute(zip.getInputStream(entry));
                            } catch (IOException ex) {
                                throw new IllegalStateException(ex);
                            }
                        }
                ).toList()));
            }
        } catch (IOException e) {
            throw new IllegalStateException(e);
        }
        return result;
    }
}