/*

 * Copyright (c) 2018, 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.

 *

 * 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.

 */

package jdk.jfr.api.event;

import java.io.IOException;

import java.util.List;

import jdk.jfr.Event;

import jdk.jfr.EventType;

import jdk.jfr.FlightRecorder;

import jdk.jfr.Recording;

import jdk.jfr.Registered;

import jdk.jfr.consumer.RecordedEvent;

import jdk.test.lib.Asserts;

import jdk.test.lib.jfr.Events;

/*

 * @test

 * @summary Test enable/disable event and verify recording has expected events.

 * @key jfr

 * @library /test/lib

 * @run main/othervm jdk.jfr.api.event.TestClinitRegistration

 */

public class TestClinitRegistration {

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

        // Test basic registration with or without auto registration

        assertClinitRegister(AutoRegisteredEvent.class, true, false);

        assertClinitRegister(NotAutoRegisterededEvent.class, false, false);

        assertClinitRegister(AutoRegisteredUserClinit.class, true, true);

        assertClinitRegister(NotAutoRegisteredUserClinit.class, false, true);

        // Test complex <clinit>

        assertClinitRegister(ComplexClInit.class, true, true);

        // Test hierarchy

        assertClinitRegister(DerivedClinit.class, true, true);

        if (!isClinitExecuted(Base.class)) {

            Asserts.fail("Expected <clinit> of base class to be executed");

        }

        // Test committed event in <clinit>

        Recording r = new Recording();

        r.start();

        r.enable(EventInClinit.class);

        triggerClinit(EventInClinit.class);

        r.stop();

        hasEvent(r, EventInClinit.class.getName());

    }

    private static void assertClinitRegister(Class<? extends Event> eventClass, boolean shouldExist, boolean setsProperty) throws ClassNotFoundException {

        String className = eventClass.getName();

        triggerClinit(eventClass);

        boolean hasEventType = hasEventType(className);

        boolean hasProperty = Boolean.getBoolean(className);

        if (hasEventType && !shouldExist) {

            Asserts.fail("Event class " + className + " should not be registered");

        }

        if (!hasEventType && shouldExist) {

            Asserts.fail("Event class " + className + " is not registered");

        }

        if (setsProperty && !hasProperty) {

            Asserts.fail("Expected clinit to be executed");

        }

        if (!setsProperty && hasProperty) {

            Asserts.fail("Property in clinit should not been set. Test bug?");

        }

    }

    private static boolean hasEventType(String name) {

        for (EventType type : FlightRecorder.getFlightRecorder().getEventTypes()) {

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

                return true;

            }

        }

        return false;

    }

    private static void triggerClinit(Class<?> clazz) throws ClassNotFoundException {

        Class.forName(clazz.getName(), true, clazz.getClassLoader());

    }

    private static void setClinitExecuted(Class<? extends Event> eventClass) {

        System.setProperty(eventClass.getName(), "true");

    }

    private static boolean isClinitExecuted(Class<? extends Event> eventClass) {

        return "true".equals(System.getProperty(eventClass.getName(), "true"));

    }

    static class AutoRegisteredEvent extends Event {

    }

    @Registered(false)

    static class NotAutoRegisterededEvent extends Event {

    }

    static class AutoRegisteredUserClinit extends Event {

        static {

            setClinitExecuted(AutoRegisteredUserClinit.class);

        }

    }

    @Registered(false)

    static class NotAutoRegisteredUserClinit extends Event {

        static {

            setClinitExecuted(NotAutoRegisteredUserClinit.class);

        }

    }

    static class Base extends Event {

        static {

            setClinitExecuted(Base.class);

        }

    }

    static class DerivedClinit extends Base {

        static {

            setClinitExecuted(DerivedClinit.class);

        }

        @Deprecated

        void myVoidMethod() {

        }

    }

    static class ComplexClInit extends Event {

        static {

            setClinitExecuted(ComplexClInit.class);

        }

        public static final long l = Long.parseLong("7");

        public static final int i = Integer.parseInt("7");

        public static final short s = Short.parseShort("7");

        public static final double d = Double.parseDouble("7");

        public static final float f = Float.parseFloat("7");

        public static final boolean b = Boolean.parseBoolean("true");

        public static final char c = (char) Integer.parseInt("48");

        public static final String text = "ioio".substring(2);

        public static final int[] primitivArray = new int[] { 7, 4 };

        public static final Class<?> Object = ComplexClInit.class;

        static {

            String text = "";

            long l = 56;

            long i = 56;

            if (i != l) {

                throw new RuntimeException("unexpected result from comparison");

            }

            if (!isClinitExecuted(ComplexClInit.class)) {

                throw new RuntimeException("Expected clinit flag to be set" + text);

            }

        }

        static {

            try {

                throw new IllegalStateException("Exception");

            } catch (IllegalStateException ise) {

                // as expected

            }

        }

    }

    static class EventInClinit extends Event {

        static {

            EventInClinit eventInClinit = new EventInClinit();

            eventInClinit.commit();

        }

    }

    public static void hasEvent(Recording r, String name) throws IOException {

        List<RecordedEvent> events = Events.fromRecording(r);

        Events.hasEvents(events);

        for (RecordedEvent event : events) {

            if (event.getEventType().getName().equals(name)) {

                return;

            }

        }

        Asserts.fail("Missing event " + name + " in recording " + events.toString());

    }

}