/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.commons.compress.archivers;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;

import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.file.Files;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.compress.AbstractTestCase;
import org.apache.commons.compress.archivers.cpio.CpioArchiveEntry;
import org.apache.commons.compress.archivers.cpio.CpioArchiveInputStream;
import org.apache.commons.compress.archivers.cpio.CpioArchiveOutputStream;
import org.apache.commons.compress.archivers.cpio.CpioConstants;
import org.apache.commons.compress.utils.IOUtils;
import org.junit.Test;

public final class CpioTestCase extends AbstractTestCase {

    @Test
    public void testCpioArchiveCreation() throws Exception {
        final File output = new File(dir, "bla.cpio");

        final File file1 = getFile("test1.xml");
        final File file2 = getFile("test2.xml");

        final OutputStream out = Files.newOutputStream(output.toPath());
        final ArchiveOutputStream os = ArchiveStreamFactory.DEFAULT.createArchiveOutputStream("cpio", out);
        os.putArchiveEntry(new CpioArchiveEntry("test1.xml", file1.length()));
        IOUtils.copy(Files.newInputStream(file1.toPath()), os);
        os.closeArchiveEntry();

        os.putArchiveEntry(new CpioArchiveEntry("test2.xml", file2.length()));
        IOUtils.copy(Files.newInputStream(file2.toPath()), os);
        os.closeArchiveEntry();

        os.close();
        out.close();
    }

    @Test
    public void testCpioUnarchive() throws Exception {
        final File output = new File(dir, "bla.cpio");
        final File file1 = getFile("test1.xml");
        final File file2 = getFile("test2.xml");
        final long file1Length = file1.length();
        final long file2Length = file2.length();

        {
            final OutputStream out = Files.newOutputStream(output.toPath());
            final ArchiveOutputStream os = ArchiveStreamFactory.DEFAULT.createArchiveOutputStream("cpio", out);
            CpioArchiveEntry entry = new CpioArchiveEntry("test1.xml", file1Length);
            entry.setMode(CpioConstants.C_ISREG);
            os.putArchiveEntry(entry);
            IOUtils.copy(Files.newInputStream(file1.toPath()), os);
            os.closeArchiveEntry();

            entry = new CpioArchiveEntry("test2.xml", file2Length);
            entry.setMode(CpioConstants.C_ISREG);
            os.putArchiveEntry(entry);
            IOUtils.copy(Files.newInputStream(file2.toPath()), os);
            os.closeArchiveEntry();
            os.finish();
            os.close();
            out.close();
        }

        // Unarchive Operation
        final File input = output;
        final InputStream is = Files.newInputStream(input.toPath());
        final ArchiveInputStream in = ArchiveStreamFactory.DEFAULT.createArchiveInputStream("cpio", is);


        final Map<String, File> result = new HashMap<>();
        ArchiveEntry entry = null;
        while ((entry = in.getNextEntry()) != null) {
            final File cpioget = new File(dir, entry.getName());
            final OutputStream out = Files.newOutputStream(cpioget.toPath());
            IOUtils.copy(in, out);
            out.close();
            result.put(entry.getName(), cpioget);
        }
        in.close();
        is.close();

        File t = result.get("test1.xml");
        assertTrue("Expected " + t.getAbsolutePath() + " to exist", t.exists());
        assertEquals("length of " + t.getAbsolutePath(), file1Length, t.length());

        t = result.get("test2.xml");
        assertTrue("Expected " + t.getAbsolutePath() + " to exist", t.exists());
        assertEquals("length of " + t.getAbsolutePath(), file2Length, t.length());
    }

    @Test
    public void testDirectoryEntryFromFile() throws Exception {
        final File[] tmp = createTempDirAndFile();
        File archive = null;
        CpioArchiveOutputStream tos = null;
        CpioArchiveInputStream tis = null;
        try {
            archive = File.createTempFile("test.", ".cpio", tmp[0]);
            archive.deleteOnExit();
            tos = new CpioArchiveOutputStream(Files.newOutputStream(archive.toPath()));
            final long beforeArchiveWrite = tmp[0].lastModified();
            final CpioArchiveEntry in = new CpioArchiveEntry(tmp[0], "foo");
            tos.putArchiveEntry(in);
            tos.closeArchiveEntry();
            tos.close();
            tos = null;
            tis = new CpioArchiveInputStream(Files.newInputStream(archive.toPath()));
            final CpioArchiveEntry out = tis.getNextCPIOEntry();
            tis.close();
            tis = null;
            assertNotNull(out);
            assertEquals("foo", out.getName());
            assertEquals(0, out.getSize());
            // CPIO stores time with a granularity of 1 second
            assertEquals(beforeArchiveWrite / 1000,
                         out.getLastModifiedDate().getTime() / 1000);
            assertTrue(out.isDirectory());
        } finally {
            if (tis != null) {
                tis.close();
            }
            if (tos != null) {
                tos.close();
            }
            tryHardToDelete(archive);
            tryHardToDelete(tmp[1]);
            rmdir(tmp[0]);
        }
    }

    @Test
    public void testExplicitDirectoryEntry() throws Exception {
        final File[] tmp = createTempDirAndFile();
        File archive = null;
        CpioArchiveOutputStream tos = null;
        CpioArchiveInputStream tis = null;
        try {
            archive = File.createTempFile("test.", ".cpio", tmp[0]);
            archive.deleteOnExit();
            tos = new CpioArchiveOutputStream(Files.newOutputStream(archive.toPath()));
            final long beforeArchiveWrite = tmp[0].lastModified();
            final CpioArchiveEntry in = new CpioArchiveEntry("foo/");
            in.setTime(beforeArchiveWrite / 1000);
            in.setMode(CpioConstants.C_ISDIR);
            tos.putArchiveEntry(in);
            tos.closeArchiveEntry();
            tos.close();
            tos = null;
            tis = new CpioArchiveInputStream(Files.newInputStream(archive.toPath()));
            final CpioArchiveEntry out = tis.getNextCPIOEntry();
            tis.close();
            tis = null;
            assertNotNull(out);
            assertEquals("foo/", out.getName());
            assertEquals(0, out.getSize());
            assertEquals(beforeArchiveWrite / 1000,
                         out.getLastModifiedDate().getTime() / 1000);
            assertTrue(out.isDirectory());
        } finally {
            if (tis != null) {
                tis.close();
            }
            if (tos != null) {
                tos.close();
            }
            tryHardToDelete(archive);
            tryHardToDelete(tmp[1]);
            rmdir(tmp[0]);
        }
    }

    @Test
    public void testFileEntryFromFile() throws Exception {
        final File[] tmp = createTempDirAndFile();
        File archive = null;
        CpioArchiveOutputStream tos = null;
        CpioArchiveInputStream tis = null;
        InputStream fis = null;
        try {
            archive = File.createTempFile("test.", ".cpio", tmp[0]);
            archive.deleteOnExit();
            tos = new CpioArchiveOutputStream(Files.newOutputStream(archive.toPath()));
            final CpioArchiveEntry in = new CpioArchiveEntry(tmp[1], "foo");
            tos.putArchiveEntry(in);
            final byte[] b = new byte[(int) tmp[1].length()];
            fis = Files.newInputStream(tmp[1].toPath());
            while (fis.read(b) > 0) {
                tos.write(b);
            }
            fis.close();
            fis = null;
            tos.closeArchiveEntry();
            tos.close();
            tos = null;
            tis = new CpioArchiveInputStream(Files.newInputStream(archive.toPath()));
            final CpioArchiveEntry out = tis.getNextCPIOEntry();
            tis.close();
            tis = null;
            assertNotNull(out);
            assertEquals("foo", out.getName());
            assertEquals(tmp[1].length(), out.getSize());
            assertEquals(tmp[1].lastModified() / 1000,
                         out.getLastModifiedDate().getTime() / 1000);
            assertFalse(out.isDirectory());
        } finally {
            if (tis != null) {
                tis.close();
            }
            if (tos != null) {
                tos.close();
            }
            tryHardToDelete(archive);
            if (fis != null) {
                fis.close();
            }
            tryHardToDelete(tmp[1]);
            rmdir(tmp[0]);
        }
    }

    @Test
    public void testExplicitFileEntry() throws Exception {
        final File[] tmp = createTempDirAndFile();
        File archive = null;
        CpioArchiveOutputStream tos = null;
        CpioArchiveInputStream tis = null;
        InputStream fis = null;
        try {
            archive = File.createTempFile("test.", ".cpio", tmp[0]);
            archive.deleteOnExit();
            tos = new CpioArchiveOutputStream(Files.newOutputStream(archive.toPath()));
            final CpioArchiveEntry in = new CpioArchiveEntry("foo");
            in.setTime(tmp[1].lastModified() / 1000);
            in.setSize(tmp[1].length());
            in.setMode(CpioConstants.C_ISREG);
            tos.putArchiveEntry(in);
            final byte[] b = new byte[(int) tmp[1].length()];
            fis = Files.newInputStream(tmp[1].toPath());
            while (fis.read(b) > 0) {
                tos.write(b);
            }
            fis.close();
            fis = null;
            tos.closeArchiveEntry();
            tos.close();
            tos = null;
            tis = new CpioArchiveInputStream(Files.newInputStream(archive.toPath()));
            final CpioArchiveEntry out = tis.getNextCPIOEntry();
            tis.close();
            tis = null;
            assertNotNull(out);
            assertEquals("foo", out.getName());
            assertEquals(tmp[1].length(), out.getSize());
            assertEquals(tmp[1].lastModified() / 1000,
                         out.getLastModifiedDate().getTime() / 1000);
            assertFalse(out.isDirectory());
        } finally {
            if (tis != null) {
                tis.close();
            }
            if (tos != null) {
                tos.close();
            }
            tryHardToDelete(archive);
            if (fis != null) {
                fis.close();
            }
            tryHardToDelete(tmp[1]);
            rmdir(tmp[0]);
        }
    }
}