package org.vafer.jdeb;

import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
import org.junit.Assert;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;
import org.junit.runners.Parameterized.Parameter;
import org.vafer.jdeb.debian.BinaryPackageControlFile;
import org.vafer.jdeb.mapping.Mapper;
import org.vafer.jdeb.mapping.PermMapper;
import org.vafer.jdeb.producers.DataProducerLink;
import org.vafer.jdeb.producers.DataProducerPathTemplate;

import java.io.File;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@RunWith(Parameterized.class)
public class DebMakerLongNameTestCase extends Assert {

    @Rule
    public TemporaryFolder folder = new TemporaryFolder();

    @Parameters
    public static Collection<Object[]> data() {
        return Arrays.asList(new Object[][] {
                { "gnu", 1, 1 },
                { "posix", 1, 1 },
                { "gnu", 5, 30 },
                { "posix", 5, 30 },
                { "gnu", 100, 1 },
                { "posix", 100, 1 },
                { "gnu", 100, 100 },
                { "posix", 100, 100 },
        });
    }

    @Parameter
    public String tarLongFileMode;

    @Parameter(1)
    public int numDirectories;

    @Parameter(2)
    public int nameLength;

    private final String FOLDER_SEPARATOR = "/";

    @Test
    public void testLongLinkName() throws Exception {
        String longPathDirName = createLongPath(numDirectories, nameLength);
        String shortPathDirName = "/var/log/short";
        Mapper mapper = new PermMapper(-1, -1, "root", "root", -1, -1, 0, null);
        String[] directories = { longPathDirName };
        Mapper[] mappers = { mapper };
        DataProducerPathTemplate dataProducer =  new DataProducerPathTemplate(directories, null, null, mappers);

        DataProducer linkProducer = new DataProducerLink(shortPathDirName, longPathDirName, true, null, null, null);

        File deb = folder.newFile("file.deb");

        List<DataProducer> producers = Arrays.asList(linkProducer, dataProducer);

        DebMaker maker = new DebMaker(new NullConsole(), producers, null);
        maker.setControl(new File(getClass().getResource("deb/control").toURI()));
        maker.setTarLongFileMode(tarLongFileMode);
        maker.setDeb(deb);
        maker.setCompression(Compression.GZIP.toString());

        BinaryPackageControlFile packageControlFile = maker.createDeb(Compression.GZIP);

        assertTrue(packageControlFile.isValid());

        final Map<String, TarArchiveEntry> filesInDeb = new HashMap<String, TarArchiveEntry>();

        ArchiveWalker.walkData(deb, new ArchiveVisitor<TarArchiveEntry>() {
            public void visit(TarArchiveEntry entry, byte[] content) throws IOException {
                filesInDeb.put(entry.getName(), entry);
            }
        }, Compression.GZIP);

        assertTrue("longname file wasn't found in the package", filesInDeb.containsKey("." + FOLDER_SEPARATOR + longPathDirName + FOLDER_SEPARATOR));
        assertTrue("short wasn't found in the package", filesInDeb.containsKey("." + shortPathDirName));
        assertTrue("Cannot delete the file " + deb, deb.delete());
    }

    private String createLongPath(int numDirectories, int nameLength) {
        StringBuilder builder = new StringBuilder();
        builder.append(FOLDER_SEPARATOR);
        for(int i = 0; i < numDirectories; ++i) {
            builder.append(i);
            builder.append(FOLDER_SEPARATOR);
        }
        for(int i = 0; i < nameLength; ++i) {
            builder.append(i);
        }
        return builder.toString();
    }
}
