/*
 * Copyright 2012-2017 Red Hat, Inc.
 *
 * This file is part of Thermostat.
 *
 * Thermostat is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation; either version 2, or (at your
 * option) any later version.
 *
 * Thermostat 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Thermostat; see the file COPYING.  If not see
 * <http://www.gnu.org/licenses/>.
 *
 * Linking this code with other modules is making a combined work
 * based on this code.  Thus, the terms and conditions of the GNU
 * General Public License cover the whole combination.
 *
 * As a special exception, the copyright holders of this code give
 * you permission to link this code with independent modules to
 * produce an executable, regardless of the license terms of these
 * independent modules, and to copy and distribute the resulting
 * executable under terms of your choice, provided that you also
 * meet, for each linked independent module, the terms and conditions
 * of the license of that module.  An independent module is a module
 * which is not derived from or based on this code.  If you modify
 * this code, you may extend this exception to your version of the
 * library, but you are not obligated to do so.  If you do not wish
 * to do so, delete this exception statement from your version.
 */

package com.redhat.thermostat.tools.dependency.internal.utils;

import com.redhat.thermostat.tools.dependency.internal.BundleProperties;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.jar.Attributes;
import java.util.jar.JarOutputStream;
import java.util.jar.Manifest;

/**
 */
public class TestHelper {

    public static File createTestDirectory() {
        File underneathTheBridge = null;
        try {
            underneathTheBridge = Files.createTempDirectory("underneathTheBridge").toFile();

        } catch (IOException e) {
            e.printStackTrace();
        }
        underneathTheBridge.deleteOnExit();
        return underneathTheBridge;
    }

    public static Path createJar(String exportsDirective, String importDirective, Path base) throws Exception {
        Path path = Paths.get(base.toFile().getAbsoluteFile() + "/" + exportsDirective + ".jar");
        FileOutputStream stream = new FileOutputStream(path.toFile());
        JarOutputStream target = new JarOutputStream(stream, createManifest(exportsDirective, importDirective));
        target.close();
        return path;
    }

    public static Path createJarWithExports(String jarName, String exportDirective, String importDirective, Path base) throws Exception {
        Manifest manifest = createManifest(exportDirective, importDirective);
        Path path = Paths.get(base.toFile().getAbsoluteFile() + "/" + jarName + ".jar");
        FileOutputStream stream = new FileOutputStream(path.toFile());
        JarOutputStream target = new JarOutputStream(stream, manifest);
        target.close();
        return path;
    }

    private static Manifest createManifest(String exports, String imports) {
        Manifest manifest = new Manifest();
        manifest.getMainAttributes().put(Attributes.Name.MANIFEST_VERSION, "1.0");
        manifest.getMainAttributes().put(new Attributes.Name(BundleProperties.EXPORT.id()), exports + ";");
        if (imports != null) {
            manifest.getMainAttributes().put(new Attributes.Name(BundleProperties.IMPORT.id()), imports + ";");
        }
        return manifest;
    }

}