package cyclops.reactive.collections.persistent;

import static java.util.Arrays.asList;
import static org.hamcrest.Matchers.equalTo;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;

import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;
import java.util.function.Function;
import java.util.function.Supplier;
import java.util.function.UnaryOperator;
import java.util.stream.Stream;

import com.oath.cyclops.ReactiveConvertableSequence;
import com.oath.cyclops.types.foldable.Evaluation;
import cyclops.data.tuple.Tuple;
import cyclops.reactive.collections.AbstractCollectionXTest;
import cyclops.reactive.collections.immutable.PersistentQueueX;
import cyclops.control.Option;
import cyclops.reactive.Spouts;
import cyclops.data.tuple.Tuple2;
import org.junit.Before;
import org.junit.Test;

import com.oath.cyclops.data.collections.extensions.FluentCollectionX;

public class PQueueXTest extends AbstractCollectionXTest {

	AtomicLong counter = new AtomicLong(0);
	@Before
	public void setup(){

		counter = new AtomicLong(0);
		super.setup();
	}
    @Test
    public void span(){

        assertThat(of(1,2,3,4,1,2,3,4).span(i->i<3),equalTo(Tuple.tuple(of(1,2),of(3,4,1,2,3,4))));
        assertThat(of(1,2,3).span(i->i<9),equalTo(Tuple.tuple(of(1,2,3),of())));
        assertThat(of(1,2,3).span(i->i<0),equalTo(Tuple.tuple(of(),of(1,2,3))));
    }

    @Test
    public void splitBy(){

        assertThat(of(1,2,3,4,1,2,3,4).splitBy(i->i>3),equalTo(Tuple.tuple(of(1,2,3),of(4,1,2,3,4))));
        assertThat(of(1,2,3).splitBy(i->i<9),equalTo(Tuple.tuple(of(),of(1,2,3))));
        assertThat(of(1,2,3).splitBy(i->i<0),equalTo(Tuple.tuple(of(1,2,3),of())));
    }

    @Test
    public void splitAtTest(){
        assertThat(of(1,2,3).splitAt(4) ,equalTo(Tuple.tuple(of(1,2,3),of())));
        assertThat(of(1,2,3).splitAt(3) ,equalTo(Tuple.tuple(of(1,2,3),of())));
        assertThat(of(1,2,3).splitAt(2) ,equalTo(Tuple.tuple(of(1,2),of(3))));
        assertThat(of(1,2,3).splitAt(1) ,equalTo(Tuple.tuple(of(1),of(2,3))));
        assertThat(of(1,2,3).splitAt(0) ,equalTo(Tuple.tuple(of(),of(1,2,3))));
        assertThat(of(1,2,3).splitAt(-1) ,equalTo(Tuple.tuple(of(),of(1,2,3))));
    }

    @Test
    public void testPartition() {


        assertEquals(asList(1, 3, 5), of(1, 2, 3, 4, 5, 6).partition(i -> i % 2 != 0)._1().toList());
        assertEquals(asList(2, 4, 6), of(1, 2, 3, 4, 5, 6).partition(i -> i % 2 != 0)._2().toList());

        assertEquals(asList(2, 4, 6), of(1, 2, 3, 4, 5, 6).partition(i -> i % 2 == 0)._1().toList());
        assertEquals(asList(1, 3, 5), of(1, 2, 3, 4, 5, 6).partition(i -> i % 2 == 0)._2().toList());

        assertEquals(asList(1, 2, 3), of(1, 2, 3, 4, 5, 6).partition(i -> i <= 3)._1().toList());
        assertEquals(asList(4, 5, 6), of(1, 2, 3, 4, 5, 6).partition(i -> i <= 3)._2().toList());

        assertEquals(asList(1, 2, 3, 4, 5, 6), of(1, 2, 3, 4, 5, 6).partition(i -> true)._1().toList());
        assertEquals(asList(), of(1, 2, 3, 4, 5, 6).partition(i -> true)._2().toList());

        assertEquals(asList(), of(1, 2, 3, 4, 5, 6).partition(i -> false)._1().toList());
        assertEquals(asList(1, 2, 3, 4, 5, 6), of(1, 2, 3, 4, 5, 6).splitBy(i -> false)._1().toList());
    }
	@Test
	public void asyncTest() throws InterruptedException {
		Spouts.async(Stream.generate(()->"next"), Executors.newFixedThreadPool(1))
				.onePer(1, TimeUnit.MILLISECONDS)
				.take(1000)
				.to(ReactiveConvertableSequence::converter)
				.persistentQueueX(Evaluation.LAZY)
				.peek(i->counter.incrementAndGet())
				.materialize();

		long current = counter.get();
		Thread.sleep(400);
		assertTrue(current<counter.get());
	}
	@Override
	public <T> PersistentQueueX<T> of(T... values) {
		return PersistentQueueX.of(values);
	}
	@Test
    public void onEmptySwitch(){
            assertThat(PersistentQueueX.empty().onEmptySwitch(()-> PersistentQueueX.of(1,2,3)).toList(), equalTo(PersistentQueueX.of(1,2,3).toList()));
    }

	@Test
    public void coflatMap(){
       assertThat(PersistentQueueX.of(1,2,3)
                   .coflatMap(s->s.sumInt(i->i))
                   .singleOrElse(null),equalTo(6));

    }
	/* (non-Javadoc)
	 * @see com.oath.cyclops.function.collections.extensions.AbstractCollectionXTest#zero()
	 */
	@Override
	public <T> FluentCollectionX<T> empty() {
		return PersistentQueueX.empty();
	}
	 @Override
	    public FluentCollectionX<Integer> range(int start, int end) {
	        return PersistentQueueX.range(start, end);
	    }
	    @Override
	    public FluentCollectionX<Long> rangeLong(long start, long end) {
	        return PersistentQueueX.rangeLong(start, end);
	    }
	    @Override
	    public <T> FluentCollectionX<T> iterate(int times, T seed, UnaryOperator<T> fn) {
	       return PersistentQueueX.iterate(times, seed, fn);
	    }
	    @Override
	    public <T> FluentCollectionX<T> generate(int times,  Supplier<T> fn) {
	       return PersistentQueueX.generate(times, fn);
	    }
	    @Override
	    public <U, T> FluentCollectionX<T> unfold(U seed, Function<? super U, Option<Tuple2<T, U>>> unfolder) {
	       return PersistentQueueX.unfold(seed, unfolder);
	    }
}
