/*
file name:      DispatcherTests.java
Authors:        Ike Lage
last modified:  03/12/2025

How to run:     java -ea DispatcherTests
*/

public class DispatcherTests {

    public static double dispatcherTests() {   
        double testScore = 0.;

        /**
         * Single Server Test
         */
        {
            //Note, since there's one server, it doesn't matter which specific dispatcher we use
            JobDispatcher jd = new RandomDispatcher(1, false);
            Job[] jobs = new Job[5];

            for (int i = 0; i < jobs.length; i++)
                jd.handleJob(jobs[i] = new Job(i, 2 * i + 1));
            jd.finishUp();

            System.out.println( jd.getAverageWaitingTime() + " == 9" );
            assert jd.getAverageWaitingTime()== 9.0 ;
            if (jd.getAverageWaitingTime() == 9)
                testScore += 4;
        }
        
        /**
         * Multiple Server Tests
         */
        {
            //Round robin Dispatcher
            JobDispatcher jd = new RoundRobinDispatcher(2, false);

            //Some jobs that produce different behaviors for the 3 deterministic servers
            jd.handleJob( new Job(0 , 10.0) );
            jd.handleJob( new Job(1. , 2.0) );
            jd.handleJob( new Job(2. , 2.0) );
            jd.handleJob( new Job(4. , 1.0) );
            jd.handleJob( new Job(5. , 7.0) );

            jd.finishUp();

            System.out.println( jd.getAverageWaitingTime() + " == 7.4" );
            assert jd.getAverageWaitingTime() == 7.4 ;
            if (jd.getAverageWaitingTime() == 7.4 )
                testScore++;
        }
        {
            //ShortestQueue Dispatcher
            JobDispatcher jd = new ShortestQueueDispatcher(2, false);

            //Some jobs that produce different behaviors for the 3 deterministic servers
            jd.handleJob( new Job(0 , 10.0) );
            jd.handleJob( new Job(1. , 2.0) );
            jd.handleJob( new Job(2. , 2.0) );
            jd.handleJob( new Job(4. , 1.0) );
            jd.handleJob( new Job(5. , 7.0) );

            jd.finishUp();

            System.out.println( jd.getAverageWaitingTime() + " == 6.0" );
            assert jd.getAverageWaitingTime() == 6.0;
            if (jd.getAverageWaitingTime() == 6.0 )
                testScore++;
        }
        {
            //LeastWork Dispatcher
            JobDispatcher jd = new LeastWorkDispatcher(2, false);

            //Some jobs that produce different behaviors for the 3 deterministic servers
            jd.handleJob( new Job(0 , 10.0) );
            jd.handleJob( new Job(1. , 2.0) );
            jd.handleJob( new Job(2. , 2.0) );
            jd.handleJob( new Job(4. , 1.0) );
            jd.handleJob( new Job(5. , 7.0) );

            jd.finishUp();

            System.out.println( jd.getAverageWaitingTime() + " == 5.0" );
            assert jd.getAverageWaitingTime() == 5.0 ;
            if (jd.getAverageWaitingTime() == 5.0 )
                testScore++;
        }

    return testScore ;
    }

    public static void main(String[] args) {
        System.out.println( dispatcherTests() );
    }

}