/*
 * 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.beam.sdk.nexmark.queries.sql;

import com.google.common.collect.ImmutableList;
import java.util.List;
import org.apache.beam.sdk.nexmark.model.AuctionPrice;
import org.apache.beam.sdk.nexmark.model.Bid;
import org.apache.beam.sdk.nexmark.model.Event;
import org.apache.beam.sdk.testing.PAssert;
import org.apache.beam.sdk.testing.TestPipeline;
import org.apache.beam.sdk.transforms.Create;
import org.apache.beam.sdk.values.PCollection;
import org.joda.time.Instant;
import org.junit.Rule;
import org.junit.Test;

/** Unit tests for {@link SqlQuery2}. */
public class SqlQuery2Test {

  private static final List<Bid> BIDS =
      ImmutableList.of(
          newBid(1L),
          newBid(2L),
          newBid(3L),
          newBid(4L),
          newBid(5L),
          newBid(6L),
          newBid(7L),
          newBid(8L));

  private static final List<Event> BIDS_EVENTS =
      ImmutableList.of(
          new Event(BIDS.get(0)),
          new Event(BIDS.get(1)),
          new Event(BIDS.get(2)),
          new Event(BIDS.get(3)),
          new Event(BIDS.get(4)),
          new Event(BIDS.get(5)),
          new Event(BIDS.get(6)),
          new Event(BIDS.get(7)));

  private static final List<AuctionPrice> BIDS_EVEN =
      ImmutableList.of(
          newAuctionPrice(BIDS.get(1)),
          newAuctionPrice(BIDS.get(3)),
          newAuctionPrice(BIDS.get(5)),
          newAuctionPrice(BIDS.get(7)));

  private static final List<AuctionPrice> BIDS_EVERY_THIRD =
      ImmutableList.of(newAuctionPrice(BIDS.get(2)), newAuctionPrice(BIDS.get(5)));

  @Rule public TestPipeline testPipeline = TestPipeline.create();

  @Test
  public void testSkipsEverySecondElement() throws Exception {
    PCollection<Event> bids = testPipeline.apply(Create.of(BIDS_EVENTS));

    PAssert.that(bids.apply(new SqlQuery2(2))).containsInAnyOrder(BIDS_EVEN);

    testPipeline.run();
  }

  @Test
  public void testSkipsEveryThirdElement() throws Exception {
    PCollection<Event> bids = testPipeline.apply(Create.of(BIDS_EVENTS));

    PAssert.that(bids.apply(new SqlQuery2(3))).containsInAnyOrder(BIDS_EVERY_THIRD);

    testPipeline.run();
  }

  private static Bid newBid(long id) {
    return new Bid(id, 3L, 100L, new Instant(432342L + id), "extra_" + id);
  }

  private static AuctionPrice newAuctionPrice(Bid bid) {
    return new AuctionPrice(bid.auction, bid.price);
  }
}
