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 * 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,
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 *
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package jdk.jfr.jcmd;

import java.io.File;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.List;

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 {

    private static File destination;

    private static final String RECORD_NAME = "RecordingDumpTest";

    private static final File RECORD_DESTINATION = new File("test.jfr");

    public static void main(String[] args) throws Exception {
        testJfrDump(null, null);
        testJfrDump(RECORD_NAME, null);
        testJfrDump(RECORD_NAME, new File("dump.jfr"));
    }

    private static File checkDefaultBehavior() throws Exception {
      try (var files = Files.find(Path.of("."), 1, (p, a) -> p.toString().matches("^.*hotspot-pid-.*\\.jfr$") && (a.size() > 0L))) {
          var result = files.findAny();
          Asserts.assertTrue(result.isPresent(), "Flight record does not exist");
          return result.get().toFile();
      }
    }

    private static void testJfrDump(String name, File file) throws Exception {
        File dumpFile = (file == null) ? RECORD_DESTINATION : file;

        try (Recording r = new Recording()) {
            r.setName(RECORD_NAME);
            r.setDestination(RECORD_DESTINATION.toPath());
            r.start();

            String[] params = buildParameters(name, file);
            JcmdHelper.jcmd(params);

            if ((name == null) && (file == null)) {
                dumpFile = checkDefaultBehavior();
            } else {
                Asserts.assertTrue(dumpFile.exists(), dumpFile.toString() + " does not exist");
                Asserts.assertGT(dumpFile.length(), 0L, "Flight record should be dumped to " + dumpFile.toString());
            }
        }

        dumpFile.delete();
        if (!RECORD_DESTINATION.equals(dumpFile)) {
            RECORD_DESTINATION.delete();
        }
    }

    private static String[] buildParameters(String name, File file) {
        List<String> params = new ArrayList<>();
        params.add("JFR.dump");
        if (name != null) {
            params.add("name=" + name);
        }
        if (file != null) {
            params.add("filename=" + file.toString());
        }
        return params.toArray(new String[0]);
    }
}