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 * 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.startupargs;

import java.io.IOException;

import java.nio.file.DirectoryStream;

import java.nio.file.Files;

import java.nio.file.Path;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import java.util.stream.Collectors;

import jdk.jfr.FlightRecorder;

import jdk.jfr.Recording;

import jdk.test.lib.Asserts;

import jdk.test.lib.dcmd.CommandExecutor;

import jdk.test.lib.dcmd.PidJcmdExecutor;

import jdk.test.lib.process.OutputAnalyzer;

public class StartupHelper {

    public static Recording getRecording(String name) {

        for (Recording r : FlightRecorder.getFlightRecorder().getRecordings()) {

            System.out.println("Recording=" + r.getName());

            if (name.equals(r.getName())) {

                return r;

            }

        }

        Asserts.fail("No recording with name " + name);

        return null;

    }

    public static List<Path> listFilesInDir(Path root) throws IOException {

        List<Path> paths = new ArrayList<>();

        List<Path> searchPaths = new ArrayList<>();

        searchPaths.add(root);

        while (!searchPaths.isEmpty()) {

            Path currRoot = searchPaths.remove(searchPaths.size() - 1);

            DirectoryStream<Path> contents = Files.newDirectoryStream(currRoot);

            for (Path path : contents) {

                paths.add(path);

                if (Files.isDirectory(path)) {

                    searchPaths.add(path);

                }

            }

        }

        System.out.println("Files in '" + root + "':");

        for (Path path : paths) {

            System.out.println("  path: " + path);

        }

        return paths;

    }

    public static Path findRecordingFileInRepo(Path baseLocation) throws IOException {

        // Check that repo contains a file ending in "jfr" or "part"

        for (Path path : listFilesInDir(baseLocation)) {

            if (Files.isRegularFile(path)) {

                String filename = path.toString();

                if (filename.endsWith("jfr") || filename.endsWith("part")) {

                    return path;

                }

            }

        }

        return null;

    }

    public static OutputAnalyzer jcmd(String... args) {

        String argsString = Arrays.stream(args).collect(Collectors.joining(" "));

        CommandExecutor executor = new PidJcmdExecutor();

        OutputAnalyzer oa = executor.execute(argsString);

        oa.shouldHaveExitValue(0);

        return oa;

    }

    public static OutputAnalyzer jcmdCheck(String recordingName) {

        return jcmd("JFR.check", "name=" + recordingName, "verbose=true");

    }

}