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

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 * 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).

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package jdk.jfr.jcmd;

import java.io.IOException;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.time.Duration;

import java.time.Instant;

import java.time.LocalDateTime;

import java.time.LocalTime;

import java.time.ZoneOffset;

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

import jdk.jfr.Event;

import jdk.jfr.Recording;

import jdk.test.lib.Asserts;

import jdk.test.lib.process.OutputAnalyzer;

/*

 * @test

 * @summary The test verifies JFR.dump command

 * @key jfr

 * @library /test/lib /test/jdk

 * @run main/othervm -XX:FlightRecorderOptions jdk.jfr.jcmd.TestJcmdDumpLimited

 */

public class TestJcmdDumpLimited {

    static class TestEvent extends Event {

        int id;

        int number;

    }

    static class TestRecording {

        Instant time;

        final Recording r;

        Path path;

        int size;

        int total;

        int id;

        Instant now;

        TestRecording(int id, int events) throws IOException, InterruptedException {

            r = new Recording();

            r.start();

            for (int i = 0; i < events; i++) {

                TestEvent event = new TestEvent();

                event.id = id;

                event.number = i;

                event.commit();

                if (i == events / 2) {

                    time = Instant.now();

                }

            }

            r.stop();

            Thread.sleep(1);

            path = Paths.get("dump-" + id + ".jfr");

            r.dump(path);

            size = (int) Files.size(path);

            this.id = id;

            this.now = Instant.now();

        }

        public void close() {

            r.close();

        }

    }

    private static long totalSize;

    private static long lastFiveSize;

    private static long firstFiveSize;

    private static long middleSize;

    private static long centerSize;

    private static long lastSize;

    private static Instant middle;

    private static Instant centerLeft;

    private static Instant centerRight;

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

        List<TestRecording> recs = new ArrayList<>();

        for (int i = 0; i < 9; i++) {

            recs.add(new TestRecording(i, 100));

        }

        int last = 0;

        List<TestRecording> reversed = new ArrayList<>(recs);

        Collections.reverse(reversed);

        for (TestRecording r : reversed) {

            r.total = r.size + last;

            last += r.size;

        }

        for (TestRecording r : recs) {

            System.out.println("Recording " + r.id + ": size=" + r.size + " (total=" + r.total + ", time=" + r.now + ")");

        }

        centerLeft = recs.get(3).time;

        middle = recs.get(4).time;

        centerRight = recs.get(5).time;

        totalSize = size(recs, 0, 9);

        lastFiveSize = size(recs, 4, 5);

        firstFiveSize = size(recs, 0, 5);

        middleSize = size(recs, 4, 1);

        centerSize = size(recs, 3, 3);

        lastSize =  size(recs, 8, 1);

        testDump();

        testDumpMaxSize();

        testDumpMaxSizeSmall();

        testDumpBegin();

        testDumpEnd();

        testDumpBeginEndInstant();

        testDumpBeginEndLocalDateTime();

        testDumpBeginEndLocalTime();

        testDumpBeginEndSame();

        testDumpMaxAge();

        testDumpBeginEndRelative();

        testDumpTooEarly();

        testDumpTooLate();

        testDumpBeginMaxAge();

        TestDumpEndMaxage();

        testDumpEndBegin();

        testDumpInvalidTime();

    }

    private static int size(List<TestRecording> recs, int skip, int limit) {

        return recs.stream().skip(skip).limit(limit).mapToInt(r -> r.size).sum();

    }

    private static void testDumpEndBegin() throws Exception {

        Path testEndBegin = Paths.get("testEndBegin.jfr");

        OutputAnalyzer output = JcmdHelper.jcmd("JFR.dump", "filename=" + testEndBegin.toFile().getAbsolutePath(), "begin=" + Instant.now(), "end=" + Instant.now().minusSeconds(200));

        output.shouldContain("Dump failed, begin must preceed end.");

        assertMissingFile(testEndBegin);

    }

    private static void TestDumpEndMaxage() throws Exception {

        Path testEndMaxAge = Paths.get("testEndMaxAge.jfr");

        OutputAnalyzer output = JcmdHelper.jcmd("JFR.dump", "filename=" + testEndMaxAge.toFile().getAbsolutePath(), "end=" + Instant.now(), "maxage=2h");

        output.shouldContain("Dump failed, maxage can't be combined with begin or end.");

        assertMissingFile(testEndMaxAge);

    }

    private static Path testDumpBeginMaxAge() throws Exception {

        Path testBeginMaxAge = Paths.get("testBeginMaxAge.jfr");

        OutputAnalyzer output = JcmdHelper.jcmd("JFR.dump", "filename=" + testBeginMaxAge.toFile().getAbsolutePath(), "begin=" + Instant.now().minusSeconds(100), "maxage=2h");

        output.shouldContain("Dump failed, maxage can't be combined with begin or end.");

        assertMissingFile(testBeginMaxAge);

        return testBeginMaxAge;

    }

    private static void testDumpTooLate() throws Exception {

        Path missing = Paths.get("missing2.jfr");

        OutputAnalyzer output = JcmdHelper.jcmd("JFR.dump", "filename=" + missing.toFile().getAbsolutePath(), "begin=" + Instant.now().plus(Duration.ofHours(1)),

                "end=" + Instant.now().plus(Duration.ofHours(2)));

        output.shouldContain("Dump failed. No data found in the specified interval.");

        assertMissingFile(missing);

    }

    private static void testDumpTooEarly() throws Exception {

        Path missing = Paths.get("missing.jfr");

        OutputAnalyzer output = JcmdHelper.jcmd("JFR.dump", "filename=" + missing.toFile().getAbsolutePath(), "end=" + Instant.now().minus(Duration.ofHours(1)));

        output.shouldContain("Dump failed. No data found in the specified interval.");

        assertMissingFile(missing);

    }

    private static void testDumpBeginEndRelative() throws IOException {

        Path testBeginEndRelative = Paths.get("testBeginEndRelative.jfr");

        JcmdHelper.jcmd("JFR.dump", "filename=" + testBeginEndRelative.toFile().getAbsolutePath(), "begin=-3h", "end=-0s");

        Asserts.assertEquals(totalSize, Files.size(testBeginEndRelative), "Expected dump with begin=-3h end=0s to contain data from all recordings");

        Files.delete(testBeginEndRelative);

    }

    private static void testDumpMaxAge() throws IOException {

        Path testMaxAge = Paths.get("testMaxAge.jfr");

        JcmdHelper.jcmd("JFR.dump", "filename=" + testMaxAge.toFile().getAbsolutePath(), "maxage=2h");

        Asserts.assertEquals(totalSize, Files.size(testMaxAge), "Expected dump with maxage=2h  to contain data from all recordings");

        Files.delete(testMaxAge);

    }

    private static void testDumpBeginEndSame() throws IOException {

        Path testBeginEnd = Paths.get("testBeginEndSame.jfr");

        JcmdHelper.jcmd("JFR.dump", "filename=" + testBeginEnd.toFile().getAbsolutePath(), "begin=" + middle, "end=" + middle);

        Asserts.assertEquals(middleSize, Files.size(testBeginEnd), "Expected dump with begin=" + middle + "end=" + middle + " contain data from middle recording");

        Files.delete(testBeginEnd);

    }

    private static void testDumpBeginEndInstant() throws IOException {

        Path testBeginEnd = Paths.get("testBeginEndInstant.jfr");

        JcmdHelper.jcmd("JFR.dump", "filename=" + testBeginEnd.toFile().getAbsolutePath(), "begin=" + centerLeft, "end=" + centerRight);

        Asserts.assertEquals(centerSize, Files.size(testBeginEnd), "Expected dump with begin=" + centerLeft + " end=" + centerRight + " contain data from the 'center'-recordings");

        Files.delete(testBeginEnd);

    }

    private static void testDumpBeginEndLocalDateTime() throws IOException {

        LocalDateTime centerLeftLocal = LocalDateTime.ofInstant(centerLeft, ZoneOffset.systemDefault());

        LocalDateTime centerRightLocal = LocalDateTime.ofInstant(centerRight, ZoneOffset.systemDefault());

        Path testBeginEnd = Paths.get("testBeginEndLocalDateTime.jfr");

        JcmdHelper.jcmd("JFR.dump", "filename=" + testBeginEnd.toFile().getAbsolutePath(), "begin=" + centerLeftLocal, "end=" + centerRightLocal);

        Asserts.assertEquals(centerSize, Files.size(testBeginEnd), "Expected dump with begin=" + centerLeftLocal + " end=" + centerRightLocal + " contain data from the 'center'-recordings");

        Files.delete(testBeginEnd);

    }

    private static void testDumpBeginEndLocalTime() throws IOException {

        LocalTime centerLeftLocal = LocalTime.ofInstant(centerLeft, ZoneOffset.systemDefault());

        LocalTime centerRightLocal = LocalTime.ofInstant(centerRight, ZoneOffset.systemDefault());

        Path testBeginEnd = Paths.get("testBeginEndLocalTime.jfr");

        JcmdHelper.jcmd("JFR.dump", "filename=" + testBeginEnd.toFile().getAbsolutePath(), "begin=" + centerLeftLocal, "end=" + centerRightLocal);

        Asserts.assertEquals(centerSize, Files.size(testBeginEnd), "Expected dump with begin=" + centerLeftLocal + " end=" + centerRightLocal + " contain data from the 'center'-recordings");

        Files.delete(testBeginEnd);

    }

    private static void testDumpEnd() throws IOException {

        Path testEnd = Paths.get("testEnd.jfr");

        JcmdHelper.jcmd("JFR.dump", "filename=" + testEnd.toFile().getAbsolutePath(), "end=" + middle);

        Asserts.assertEquals(firstFiveSize, Files.size(testEnd), "Expected dump with end=" + middle + " to contain data from the five first recordings");

        Files.delete(testEnd);

    }

    private static void testDumpBegin() throws IOException {

        Path testBegin = Paths.get("testBegin.jfr");

        JcmdHelper.jcmd("JFR.dump", "filename=" + testBegin.toFile().getAbsolutePath(), "begin=" + middle);

        Asserts.assertEquals(lastFiveSize, Files.size(testBegin), "Expected dump with begin=" + middle + " to contain data from the last five recordings");

        Files.delete(testBegin);

    }

    private static void testDumpMaxSize() throws IOException {

        Path testMaxSize = Paths.get("testMaxSize.jfr");

        JcmdHelper.jcmd("JFR.dump", "filename=" + testMaxSize.toFile().getAbsolutePath(), "maxsize=" + lastFiveSize);

        Asserts.assertEquals(lastFiveSize, Files.size(testMaxSize), "Expected dump with maxsize=" + lastFiveSize + " to contain data from the last five recordings");

        Files.delete(testMaxSize);

    }

    private static void testDumpMaxSizeSmall() throws IOException {

        Path testMaxSizeSmall = Paths.get("testMaxSizeSmall.jfr");

        JcmdHelper.jcmd("JFR.dump", "filename=" + testMaxSizeSmall.toFile().getAbsolutePath(), "maxsize=1k");

        Asserts.assertEquals(lastSize, Files.size(testMaxSizeSmall), "Expected dump with maxsize=1k to contain data from the last recording");

        Files.delete(testMaxSizeSmall);

    }

    private static void testDump() throws IOException {

        Path all = Paths.get("all.jfr");

        OutputAnalyzer output = JcmdHelper.jcmd("JFR.dump", "filename=" + all.toFile().getAbsolutePath());

        JcmdAsserts.assertRecordingDumpedToFile(output, all.toFile());

        Asserts.assertEquals(totalSize, Files.size(all), "Expected dump to be sum of all recordings");

        Files.delete(all);

    }

    private static void testDumpInvalidTime() throws Exception {

        Path invalidTime = Paths.get("invalidTime.jfr");

        OutputAnalyzer output = JcmdHelper.jcmd("JFR.dump", "filename=" + invalidTime.toFile().getAbsolutePath(), "begin=4711");

        output.shouldContain("Dump failed, not a valid begin time.");

        assertMissingFile(invalidTime);

    }

    private static void assertMissingFile(Path missing) throws Exception {

        if (Files.exists(missing)) {

            throw new Exception("Unexpected dumpfile found");

        }

    }

}