package org.jboss.resteasy.test.rx.resource;

import java.util.Collection;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicInteger;

public class RxScheduledExecutorService implements ScheduledExecutorService {

    public static class DaemonThreadFactory implements ThreadFactory {
        private static final AtomicInteger poolNumber = new AtomicInteger(1);
        private final ThreadGroup group;
        private final AtomicInteger threadNumber = new AtomicInteger(1);
        private final String namePrefix;

        DaemonThreadFactory() {
            group = Thread.currentThread().getThreadGroup();
            namePrefix = "resteasy-sse-eventsource" + poolNumber.getAndIncrement() + "-thread-";
        }

        public Thread newThread(Runnable r) {
            Thread t = new Thread(group, r, namePrefix + threadNumber.getAndIncrement(), 0);
            t.setDaemon(true);
            return t;
        }
    }

    private ScheduledExecutorService executor = Executors.newSingleThreadScheduledExecutor(new DaemonThreadFactory());
    public static boolean used;

    @Override
    public void shutdown() {
        used = true;
        executor.shutdown();
    }

    @Override
    public List<Runnable> shutdownNow() {
        used = true;
        return executor.shutdownNow();
    }

    @Override
    public boolean isShutdown() {
        used = true;
        return executor.isShutdown();
    }

    @Override
    public boolean isTerminated() {
        used = true;
        return executor.isTerminated();
    }

    @Override
    public boolean awaitTermination(long timeout, TimeUnit unit) throws InterruptedException {
        used = true;
        return executor.awaitTermination(timeout, unit);
    }

    @Override
    public <T> Future<T> submit(Callable<T> task) {
        used = true;
        return executor.submit(task);
    }

    @Override
    public <T> Future<T> submit(Runnable task, T result) {
        used = true;
        return executor.submit(task, result);
    }

    @Override
    public Future<?> submit(Runnable task) {
        used = true;
        return executor.submit(task);
    }

    @Override
    public <T> List<Future<T>> invokeAll(Collection<? extends Callable<T>> tasks) throws InterruptedException {
        used = true;
        return executor.invokeAll(tasks);
    }

    @Override
    public <T> List<Future<T>> invokeAll(Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit)
            throws InterruptedException {
        used = true;
        return executor.invokeAll(tasks, timeout, unit);
    }

    @Override
    public <T> T invokeAny(Collection<? extends Callable<T>> tasks)
            throws InterruptedException, ExecutionException {
        used = true;
        return executor.invokeAny(tasks);
    }

    @Override
    public <T> T invokeAny(Collection<? extends Callable<T>> tasks, long timeout, TimeUnit unit)
            throws InterruptedException, ExecutionException, TimeoutException {
        used = true;
        return executor.invokeAny(tasks, timeout, unit);
    }

    @Override
    public void execute(Runnable command) {
        used = true;
        executor.execute(command);
    }

    @Override
    public ScheduledFuture<?> schedule(Runnable command, long delay, TimeUnit unit) {
        used = true;
        return executor.schedule(command, delay, unit);
    }

    @Override
    public <V> ScheduledFuture<V> schedule(Callable<V> callable, long delay, TimeUnit unit) {
        used = true;
        return executor.schedule(callable, delay, unit);
    }

    @Override
    public ScheduledFuture<?> scheduleAtFixedRate(Runnable command, long initialDelay, long period, TimeUnit unit) {
        used = true;
        return executor.scheduleAtFixedRate(command, initialDelay, period, unit);
    }

    @Override
    public ScheduledFuture<?> scheduleWithFixedDelay(Runnable command, long initialDelay, long delay, TimeUnit unit) {
        used = true;
        return executor.scheduleWithFixedDelay(command, initialDelay, delay, unit);
    }
}
