/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.sling.event.it;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;

import java.io.IOException;
import java.util.Date;
import java.util.UUID;
import java.util.concurrent.atomic.AtomicInteger;

import org.apache.sling.event.jobs.Job;
import org.apache.sling.event.jobs.ScheduledJobInfo;
import org.apache.sling.event.jobs.consumer.JobConsumer;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.ops4j.pax.exam.junit.PaxExam;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@RunWith(PaxExam.class)
public class SchedulingTest extends AbstractJobHandlingTest {

    private static final String TOPIC = "job/scheduled/topic";

    private final Logger logger = LoggerFactory.getLogger(getClass());

    @Override
    @Before
    public void setup() throws IOException {
        super.setup();

        this.sleep(1000L);
    }

    @Override
    @After
    public void cleanup() {
        super.cleanup();
    }

    @Test(timeout = DEFAULT_TEST_TIMEOUT)
    public void testScheduling() throws Exception {
        final AtomicInteger counter = new AtomicInteger();

        this.registerJobConsumer(TOPIC, new JobConsumer() {

            @Override
            public JobResult process(final Job job) {
                if ( job.getTopic().equals(TOPIC) ) {
                    counter.incrementAndGet();
                }
                return JobResult.OK;
            }

        });

        // we schedule three jobs
        final ScheduledJobInfo info1 = this.getJobManager().createJob(TOPIC).schedule().hourly(5).add();
        assertNotNull(info1);
        final ScheduledJobInfo info2 = this.getJobManager().createJob(TOPIC).schedule().daily(10, 5).add();
        assertNotNull(info2);
        final ScheduledJobInfo info3 = this.getJobManager().createJob(TOPIC).schedule().weekly(3, 19, 12).add();
        assertNotNull(info3);

        assertEquals(3, this.getJobManager().getScheduledJobs().size()); // scheduled jobs
        info3.unschedule();
        assertEquals(2, this.getJobManager().getScheduledJobs().size()); // scheduled jobs
        info1.unschedule();
        assertEquals(1, this.getJobManager().getScheduledJobs().size()); // scheduled jobs
        info2.unschedule();
        assertEquals(0, this.getJobManager().getScheduledJobs().size()); // scheduled jobs
    }

    @Test
    public void schedulingLoadTest() throws Exception {
        logger.info("schedulingLoadTest: start");
        final AtomicInteger counter = new AtomicInteger();
        final int NUM_ITERATIONS = 1500;
        final String ownTopic = "random/" + UUID.randomUUID().toString();
        this.registerJobConsumer(ownTopic, new JobConsumer() {

            @Override
            public JobResult process(final Job job) {
                if ( job.getTopic().equals(ownTopic) ) {
                    counter.incrementAndGet();
                }
                return JobResult.OK;
            }

        });
        for(int i=0; i<NUM_ITERATIONS; i++) {
            logger.info("schedulingLoadTest: loop-" + i);
            this.getJobManager().createJob(ownTopic).schedule().at(new Date(System.currentTimeMillis() + 2500)).add();
            Thread.sleep(1);
        }
        logger.info("schedulingLoadTest: done, letting jobs be triggered, currently at {} jobs, {} schedules", counter.get(), this.getJobManager().getScheduledJobs().size());
        final long timeout = System.currentTimeMillis() + 60000;
        while(System.currentTimeMillis() < timeout) {
            if ((counter.get() == NUM_ITERATIONS) && (this.getJobManager().getScheduledJobs().size() == 0)) {
                break;
            }
            logger.info("schedulingLoadTest: currently at {} jobs, {} schedules", counter.get(), getJobManager().getScheduledJobs().size());
            Thread.sleep(100);
        }
        assertEquals(NUM_ITERATIONS, counter.get());
        assertEquals(0, this.getJobManager().getScheduledJobs().size());
        logger.info("schedulingLoadTest: end");
    }
}