/*
 * Copyright (c) 2008-2019 Emmanuel Dupuy.
 * This project is distributed under the GPLv3 license.
 * This is a Copyleft license that gives the user the right to use, 
 * copy and modify the code freely for non-commercial purposes.
 */

package org.jd.gui.service.fileloader;

import org.jd.gui.api.API;
import org.jd.gui.util.exception.ExceptionUtil;

import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.file.FileSystem;
import java.nio.file.FileSystemNotFoundException;
import java.nio.file.FileSystems;
import java.nio.file.Path;
import java.util.Collections;
import java.util.Iterator;

public class ZipFileLoaderProvider extends AbstractFileLoaderProvider {
    protected static final String[] EXTENSIONS = { "zip" };

    @Override public String[] getExtensions() { return EXTENSIONS; }
    @Override public String getDescription() { return "Zip files (*.zip)"; }

    @Override
    public boolean accept(API api, File file) {
        return file.exists() && file.isFile() && file.canRead() && file.getName().toLowerCase().endsWith(".zip");
    }

    @Override
    public boolean load(API api, File file) {
        try {
            URI fileUri = file.toURI();
            URI uri = new URI("jar:" + fileUri.getScheme(), fileUri.getHost(), fileUri.getPath() + "!/", null);
            FileSystem fileSystem;

            try {
                fileSystem = FileSystems.getFileSystem(uri);
            } catch (FileSystemNotFoundException e) {
                fileSystem = FileSystems.newFileSystem(uri, Collections.emptyMap());
            }

            if (fileSystem != null) {
                Iterator<Path> rootDirectories = fileSystem.getRootDirectories().iterator();

                if (rootDirectories.hasNext()) {
                    return load(api, file, rootDirectories.next()) != null;
                }
            }
        } catch (URISyntaxException|IOException e) {
            assert ExceptionUtil.printStackTrace(e);
        }

        return false;
    }
}