/**
 * Copyright (c) 2016-present, RxJava Contributors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is
 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
 * the License for the specific language governing permissions and limitations under the License.
 */

package io.reactivex.schedulers;

import static org.junit.Assert.*;

import java.util.concurrent.TimeUnit;

import org.junit.*;

import io.reactivex.Scheduler;
import io.reactivex.Scheduler.Worker;
import io.reactivex.disposables.*;
import io.reactivex.internal.schedulers.NewThreadWorker;

public class NewThreadSchedulerTest extends AbstractSchedulerConcurrencyTests {

    @Override
    protected Scheduler getScheduler() {
        return Schedulers.newThread();
    }

    @Test
    @Ignore("Unhandled errors are no longer thrown")
    public final void testUnhandledErrorIsDeliveredToThreadHandler() throws InterruptedException {
        SchedulerTestHelper.testUnhandledErrorIsDeliveredToThreadHandler(getScheduler());
    }

    @Test
    public final void testHandledErrorIsNotDeliveredToThreadHandler() throws InterruptedException {
        SchedulerTestHelper.testHandledErrorIsNotDeliveredToThreadHandler(getScheduler());
    }

    // FIXME no longer testable due to internal changes
//    @Test(timeout = 3000)
//    public void testNoSelfInterrupt() throws InterruptedException {
//        Scheduler.Worker worker = Schedulers.newThread().createWorker();
//        try {
//            final CountDownLatch run = new CountDownLatch(1);
//            final CountDownLatch done = new CountDownLatch(1);
//            final AtomicReference<Throwable> exception = new AtomicReference<T>();
//            final AtomicBoolean interruptFlag = new AtomicBoolean();
//
//            ScheduledRunnable sa = (ScheduledRunnable)worker.schedule(new Runnable() {
//                @Override
//                public void run() {
//                    try {
//                        run.await();
//                    } catch (InterruptedException ex) {
//                        exception.set(ex);
//                    }
//                }
//            });
//
//            sa.add(new Disposable() {
//                @Override
//                public void dispose() {
//                    interruptFlag.set(Thread.currentThread().isInterrupted());
//                    done.countDown();
//                }
//            });
//
//            run.countDown();
//
//            done.await();
//
//            Assert.assertEquals(null, exception.get());
//            Assert.assertFalse("Interrupted?!", interruptFlag.get());
//        } finally {
//            worker.dispose();
//        }
//    }

    @Test
    public void shutdownRejects() {
        final int[] calls = { 0 };

        Runnable r = new Runnable() {
            @Override
            public void run() {
                calls[0]++;
            }
        };

        Scheduler s = getScheduler();
        Worker w = s.createWorker();
        w.dispose();

        assertTrue(w.isDisposed());

        assertEquals(Disposables.disposed(), w.schedule(r));

        assertEquals(Disposables.disposed(), w.schedule(r, 1, TimeUnit.SECONDS));

        assertEquals(Disposables.disposed(), w.schedulePeriodically(r, 1, 1, TimeUnit.SECONDS));

        NewThreadWorker actual = (NewThreadWorker)w;

        CompositeDisposable cd = new CompositeDisposable();

        actual.scheduleActual(r, 1, TimeUnit.SECONDS, cd);

        assertEquals(0, cd.size());

        assertEquals(0, calls[0]);
    }

    /**
     * Regression test to ensure there is no NPE when the worker has been disposed.
     * @throws Exception on error
     */
    @Test
    public void npeRegression() throws Exception {
        Scheduler s = getScheduler();
        NewThreadWorker w = (NewThreadWorker) s.createWorker();
        w.dispose();

        //This method used to throw a NPE when the worker has been disposed and the parent is null
        w.scheduleActual(new Runnable() {
            @Override
            public void run() {
            }
        }, 0, TimeUnit.MILLISECONDS, null);

    }
}