/*

 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/* @test

 * @bug 8011536

 * @summary Basic test for creationTime attribute on platforms/file systems

 *     that support it.

 * @library ../..

 */

import java.nio.file.Path;

import java.nio.file.Files;

import java.nio.file.attribute.*;

import java.time.Instant;

import java.io.IOException;

public class CreationTime {

    private static final java.io.PrintStream err = System.err;

    /**

     * Reads the creationTime attribute

     */

    private static FileTime creationTime(Path file) throws IOException {

        return Files.readAttributes(file, BasicFileAttributes.class).creationTime();

    }

    /**

     * Sets the creationTime attribute

     */

    private static void setCreationTime(Path file, FileTime time) throws IOException {

        BasicFileAttributeView view =

            Files.getFileAttributeView(file, BasicFileAttributeView.class);

        view.setTimes(null, null, time);

    }

    static void test(Path top) throws IOException {

        Path file = Files.createFile(top.resolve("foo"));

        /**

         * Check that creationTime reported

         */

        FileTime creationTime = creationTime(file);

        Instant now = Instant.now();

        if (Math.abs(creationTime.toMillis()-now.toEpochMilli()) > 10000L) {

            err.println("File creation time reported as: " + creationTime);

            throw new RuntimeException("Expected to be close to: " + now);

        }

        /**

         * Is the creationTime attribute supported here?

         */

        boolean supportsCreationTimeRead = false;

        boolean supportsCreationTimeWrite = false;

        String os = System.getProperty("os.name");

        if (os.contains("OS X") && Files.getFileStore(file).type().equals("hfs")) {

            supportsCreationTimeRead = true;

        } else if (os.startsWith("Windows")) {

            String type = Files.getFileStore(file).type();

            if (type.equals("NTFS") || type.equals("FAT")) {

                supportsCreationTimeRead = true;

                supportsCreationTimeWrite = true;

            }

        }

        /**

         * If the creation-time attribute is supported then change the file's

         * last modified and check that it doesn't change the creation-time.

         */

        if (supportsCreationTimeRead) {

            // change modified time by +1 hour

            Instant plusHour = Instant.now().plusSeconds(60L * 60L);

            Files.setLastModifiedTime(file, FileTime.from(plusHour));

            FileTime current = creationTime(file);

            if (!current.equals(creationTime))

                throw new RuntimeException("Creation time should not have changed");

        }

        /**

         * If the creation-time attribute is supported and can be changed then

         * check that the change is effective.

         */

        if (supportsCreationTimeWrite) {

            // change creation time by -1 hour

            Instant minusHour = Instant.now().minusSeconds(60L * 60L);

            creationTime = FileTime.from(minusHour);

            setCreationTime(file, creationTime);

            FileTime current = creationTime(file);

            if (Math.abs(creationTime.toMillis()-current.toMillis()) > 1000L)

                throw new RuntimeException("Creation time not changed");

        }

    }

    public static void main(String[] args) throws IOException {

        // create temporary directory to run tests

        Path dir = TestUtil.createTemporaryDirectory();

        try {

            test(dir);

        } finally {

            TestUtil.removeAll(dir);

        }

    }

}