/*

 * Copyright (c) 2019, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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.

 *

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package jdk.jfr.jcmd;

import java.io.IOException;

import java.nio.file.Files;

import java.nio.file.Path;

import java.util.stream.Stream;

import jdk.jfr.Recording;

import jdk.test.lib.Asserts;

/**

 * @test

 * @bug 8220657

 * @key jfr

 * @requires vm.hasJFR

 * @library /test/lib /test/jdk

 * @run main/othervm jdk.jfr.jcmd.TestJcmdDumpWithFileName

 */

public class TestJcmdDumpWithFileName {

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

        testDumpAll();

        testDumpNamed();

        testDumpNamedWithFilename();

    }

    private static void testDumpAll() throws Exception {

        Path p = Path.of("testDumpAll.jfr").toAbsolutePath();

        try (Recording r = new Recording()) {

            r.setName("testDumpAll");

            r.setDestination(p);

            r.start();

            JcmdHelper.jcmd("JFR.dump");

            Asserts.assertFalse(namedFile(p), "Unexpected file: " + p.toString());

            Asserts.assertTrue(generatedFile(), "Expected generated file");

        }

        cleanup();

    }

    private static void testDumpNamed() throws Exception {

        Path p = Path.of("testDumpNamed.jfr").toAbsolutePath();

        try (Recording r = new Recording()) {

            r.setName("testDumpNamed");

            r.setDestination(p);

            r.start();

            JcmdHelper.jcmd("JFR.dump", "name=testDumpNamed");

            Asserts.assertTrue(namedFile(p), "Expected file: " + p.toString());

            Asserts.assertFalse(generatedFile(), "Unexpected generated file");

        }

        cleanup();

    }

    private static void testDumpNamedWithFilename() throws Exception {

        Path p = Path.of("testDumpNamedWithFilename.jfr").toAbsolutePath();

        Path override = Path.of("override.jfr").toAbsolutePath();

        try (Recording r = new Recording()) {

            r.setName("testDumpNamedWithFilename");

            r.setDestination(p);

            r.start();

            JcmdHelper.jcmd("JFR.dump", "name=testDumpNamedWithFilename", "filename=" + override.toString());

            Asserts.assertFalse(namedFile(p), "Unexpected file: " + p.toString());

            Asserts.assertTrue(namedFile(override), "Expected file: " + override.toString());

            Asserts.assertFalse(generatedFile(), "Unexpected generated file");

        }

        cleanup();

    }

    private static boolean namedFile(Path dumpFile) throws IOException {

        return Files.exists(dumpFile) && (Files.size(dumpFile) > 0);

    }

    private static boolean generatedFile() throws IOException {

        long pid = ProcessHandle.current().pid();

        Stream<Path> stream = Files.find(Path.of("."), 1, (p, a) -> p.toString()

                                                                     .matches("^.*hotspot-pid-" + pid + "-[0-9_]+\\.jfr$") && (a.size() > 0L));

        try (stream) {

            return stream.findAny()

                         .isPresent();

        }

    }

    private static void cleanup() throws IOException {

        Stream<Path> stream = Files.find(Path.of("."), 1, (p, a) -> p.toString().endsWith(".jfr"));

        try (stream) {

            stream.forEach(p -> p.toFile().delete());

        }

    }

}