/**
 * 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 org.apache.aurora.scheduler.discovery;

import java.net.InetSocketAddress;

import com.google.common.base.Optional;
import com.google.common.collect.ImmutableList;
import com.google.inject.AbstractModule;
import com.google.inject.Binder;
import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.Module;

import org.apache.aurora.common.quantity.Amount;
import org.apache.aurora.common.quantity.Time;
import org.apache.aurora.common.stats.StatsProvider;
import org.apache.aurora.common.testing.TearDownTestCase;
import org.apache.aurora.common.zookeeper.Credentials;
import org.apache.aurora.common.zookeeper.SingletonService;
import org.apache.aurora.common.zookeeper.ZooKeeperUtils;
import org.apache.aurora.scheduler.app.ServiceGroupMonitor;
import org.apache.aurora.scheduler.testing.FakeStatsProvider;
import org.junit.Test;

import static org.junit.Assert.assertNotNull;

abstract class AbstractDiscoveryModuleTest extends TearDownTestCase {

  @Test
  public void testBindingContract() {
    ZooKeeperConfig zooKeeperConfig =
        new ZooKeeperConfig(
            isCurator(),
            ImmutableList.of(InetSocketAddress.createUnresolved("localhost", 42)),
            Optional.of("/chroot"),
            false, // inProcess
            Amount.of(1, Time.DAYS),
            Optional.of(Credentials.digestCredentials("test", "user")));

    Injector injector =
        Guice.createInjector(
            new AbstractModule() {
              @Override
              protected void configure() {
                bind(ServiceDiscoveryBindings.ZOO_KEEPER_CLUSTER_KEY)
                    .toInstance(
                        ImmutableList.of(InetSocketAddress.createUnresolved("localhost", 42)));
                bind(ServiceDiscoveryBindings.ZOO_KEEPER_ACL_KEY)
                    .toInstance(ZooKeeperUtils.OPEN_ACL_UNSAFE);

                bind(StatsProvider.class).toInstance(new FakeStatsProvider());

                bindExtraRequirements(binder());
              }
            },
            createModule("/discovery/path", zooKeeperConfig));

    assertNotNull(injector.getBinding(SingletonService.class).getProvider().get());
    assertNotNull(injector.getBinding(ServiceGroupMonitor.class).getProvider().get());
  }

  void bindExtraRequirements(Binder binder) {
    // Noop.
  }

  abstract Module createModule(String discoveryPath, ZooKeeperConfig zooKeeperConfig);

  abstract boolean isCurator();
}