// Copyright 2016 The Nomulus Authors. All Rights Reserved.
//
// Licensed 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 google.registry.model;

import static com.google.common.truth.Truth.assertThat;
import static google.registry.model.ofy.ObjectifyService.ofy;
import static org.joda.time.DateTimeZone.UTC;

import com.googlecode.objectify.ObjectifyService;
import com.googlecode.objectify.VoidWork;
import com.googlecode.objectify.Work;
import com.googlecode.objectify.annotation.Entity;
import google.registry.model.common.CrossTldSingleton;
import google.registry.testing.AppEngineRule;
import org.joda.time.DateTime;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/** Unit tests for {@link CreateAutoTimestamp}. */
@RunWith(JUnit4.class)
public class CreateAutoTimestampTest {

  @Rule
  public final AppEngineRule appEngine = AppEngineRule.builder()
      .withDatastore()
      .build();

  /** Timestamped class. */
  @Entity
  public static class TestObject extends CrossTldSingleton {
    CreateAutoTimestamp createTime = CreateAutoTimestamp.create(null);
  }

  @Before
  public void before() throws Exception {
    ObjectifyService.register(TestObject.class);
  }

  private TestObject reload() {
    return ofy().load().entity(new TestObject()).now();
  }

  @Test
  public void testSaveSetsTime() throws Exception {
    DateTime transactionTime = ofy().transact(new Work<DateTime>() {
      @Override
      public DateTime run() {
        TestObject object = new TestObject();
        assertThat(object.createTime.getTimestamp()).isNull();
        ofy().save().entity(object);
        return ofy().getTransactionTime();
      }});
    ofy().clearSessionCache();
    assertThat(reload().createTime.timestamp).isEqualTo(transactionTime);
  }

  @Test
  public void testResavingRespectsOriginalTime() throws Exception {
    final DateTime oldCreateTime = DateTime.now(UTC).minusDays(1);
    ofy().transact(new VoidWork() {
      @Override
      public void vrun() {
        TestObject object = new TestObject();
        object.createTime = CreateAutoTimestamp.create(oldCreateTime);
        ofy().save().entity(object);
      }});
    ofy().clearSessionCache();
    assertThat(reload().createTime.timestamp).isEqualTo(oldCreateTime);
  }
}