/*
 * 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.activemq.artemis.tests.integration.cluster.failover;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.activemq.artemis.api.core.TransportConfiguration;
import org.apache.activemq.artemis.api.core.client.ActiveMQClient;
import org.apache.activemq.artemis.api.core.client.ClientSessionFactory;
import org.apache.activemq.artemis.api.core.client.ServerLocator;
import org.apache.activemq.artemis.core.client.impl.Topology;
import org.apache.activemq.artemis.core.client.impl.TopologyMemberImpl;
import org.apache.activemq.artemis.core.config.Configuration;
import org.apache.activemq.artemis.core.config.CoreQueueConfiguration;
import org.apache.activemq.artemis.core.config.ScaleDownConfiguration;
import org.apache.activemq.artemis.core.config.ha.ColocatedPolicyConfiguration;
import org.apache.activemq.artemis.core.config.ha.ReplicaPolicyConfiguration;
import org.apache.activemq.artemis.core.config.ha.ReplicatedPolicyConfiguration;
import org.apache.activemq.artemis.core.config.ha.SharedStoreMasterPolicyConfiguration;
import org.apache.activemq.artemis.core.config.ha.SharedStoreSlavePolicyConfiguration;
import org.apache.activemq.artemis.core.server.ActiveMQServer;
import org.apache.activemq.artemis.core.server.impl.ActiveMQServerImpl;
import org.apache.activemq.artemis.tests.util.ActiveMQTestBase;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;

@RunWith(value = Parameterized.class)
public class AutomaticColocatedQuorumVoteTest extends ActiveMQTestBase {

   private final boolean replicated;

   @Parameterized.Parameters(name = "replicated={0}")
   public static Collection getParameters() {
      return Arrays.asList(new Object[][]{{true}, {false}});
   }

   public AutomaticColocatedQuorumVoteTest(boolean replicated) {
      this.replicated = replicated;
   }

   @Test
   public void testSimpleDistributionBackupStrategyFull() throws Exception {
      ActiveMQServer server0 = createServer(0, 1, false);
      ActiveMQServer server1 = createServer(1, 0, false);
      TransportConfiguration liveConnector0 = getConnectorTransportConfiguration("liveConnector" + 0, 0);
      TransportConfiguration liveConnector1 = getConnectorTransportConfiguration("liveConnector" + 1, 1);

      try
         (
            ServerLocator serverLocator = ActiveMQClient.createServerLocatorWithoutHA(liveConnector0)
         ) {
         server0.start();
         server1.start();
         ClientSessionFactory sessionFactory0 = serverLocator.createSessionFactory(liveConnector0);
         waitForRemoteBackup(sessionFactory0, 10);
         ClientSessionFactory sessionFactory1 = serverLocator.createSessionFactory(liveConnector1);
         waitForRemoteBackup(sessionFactory1, 10);
         Topology topology = serverLocator.getTopology();
         Collection<TopologyMemberImpl> members = topology.getMembers();
         Assert.assertEquals(members.size(), 2);
         Map<String, ActiveMQServer> backupServers0 = server0.getClusterManager().getHAManager().getBackupServers();
         Assert.assertEquals(backupServers0.size(), 1);
         Map<String, ActiveMQServer> backupServers1 = server1.getClusterManager().getHAManager().getBackupServers();
         Assert.assertEquals(backupServers1.size(), 1);
         ActiveMQServer backupServer0 = backupServers0.values().iterator().next();
         ActiveMQServer backupServer1 = backupServers1.values().iterator().next();
         waitForRemoteBackupSynchronization(backupServer0);
         waitForRemoteBackupSynchronization(backupServer1);
         Assert.assertEquals(server0.getNodeID(), backupServer1.getNodeID());
         Assert.assertEquals(server1.getNodeID(), backupServer0.getNodeID());
         Set<TransportConfiguration> backupAcceptors0 = backupServer0.getConfiguration().getAcceptorConfigurations();
         Assert.assertEquals(1, backupAcceptors0.size());
         Assert.assertEquals("61716", backupAcceptors0.iterator().next().getParams().get("port"));
         Set<TransportConfiguration> backupAcceptors1 = backupServer1.getConfiguration().getAcceptorConfigurations();
         Assert.assertEquals(1, backupAcceptors1.size());
         Assert.assertEquals("61717", backupAcceptors1.iterator().next().getParams().get("port"));
         Map<String, TransportConfiguration> connectorConfigurations0 = backupServer0.getConfiguration().getConnectorConfigurations();
         Assert.assertEquals(2, connectorConfigurations0.size());
         Assert.assertEquals("61716", connectorConfigurations0.get("liveConnector0").getParams().get("port"));
         Assert.assertEquals("61617", connectorConfigurations0.get("remoteConnector0").getParams().get("port"));
         Map<String, TransportConfiguration> connectorConfigurations1 = backupServer1.getConfiguration().getConnectorConfigurations();
         Assert.assertEquals(2, connectorConfigurations1.size());
         Assert.assertEquals("61717", connectorConfigurations1.get("liveConnector1").getParams().get("port"));
         Assert.assertEquals("61616", connectorConfigurations1.get("remoteConnector1").getParams().get("port"));
         if (!replicated) {
            Assert.assertEquals(server0.getConfiguration().getJournalDirectory(), backupServer1.getConfiguration().getJournalDirectory());
            Assert.assertEquals(server0.getConfiguration().getBindingsDirectory(), backupServer1.getConfiguration().getBindingsDirectory());
            Assert.assertEquals(server0.getConfiguration().getLargeMessagesDirectory(), backupServer1.getConfiguration().getLargeMessagesDirectory());
            Assert.assertEquals(server0.getConfiguration().getPagingDirectory(), backupServer1.getConfiguration().getPagingDirectory());
            Assert.assertEquals(server1.getConfiguration().getJournalDirectory(), backupServer0.getConfiguration().getJournalDirectory());
            Assert.assertEquals(server1.getConfiguration().getBindingsDirectory(), backupServer0.getConfiguration().getBindingsDirectory());
            Assert.assertEquals(server1.getConfiguration().getLargeMessagesDirectory(), backupServer0.getConfiguration().getLargeMessagesDirectory());
            Assert.assertEquals(server1.getConfiguration().getPagingDirectory(), backupServer0.getConfiguration().getPagingDirectory());
         } else {
            Assert.assertNotEquals(server0.getConfiguration().getJournalDirectory(), backupServer1.getConfiguration().getJournalDirectory());
            Assert.assertNotEquals(server0.getConfiguration().getBindingsDirectory(), backupServer1.getConfiguration().getBindingsDirectory());
            Assert.assertNotEquals(server0.getConfiguration().getLargeMessagesDirectory(), backupServer1.getConfiguration().getLargeMessagesDirectory());
            Assert.assertNotEquals(server0.getConfiguration().getPagingDirectory(), backupServer1.getConfiguration().getPagingDirectory());
            Assert.assertNotEquals(server1.getConfiguration().getJournalDirectory(), backupServer0.getConfiguration().getJournalDirectory());
            Assert.assertNotEquals(server1.getConfiguration().getBindingsDirectory(), backupServer0.getConfiguration().getBindingsDirectory());
            Assert.assertNotEquals(server1.getConfiguration().getLargeMessagesDirectory(), backupServer0.getConfiguration().getLargeMessagesDirectory());
            Assert.assertNotEquals(server1.getConfiguration().getPagingDirectory(), backupServer0.getConfiguration().getPagingDirectory());
         }
      } finally {
         try {
            server0.stop();
         } catch (Throwable e) {
            e.printStackTrace();
         }
         server1.stop();
      }
   }

   @Test
   public void testSimpleDistributionBackupStrategyScaleDown() throws Exception {
      ActiveMQServer server0 = createServer(0, 1, true);
      ActiveMQServer server1 = createServer(1, 0, true);
      TransportConfiguration liveConnector0 = getConnectorTransportConfiguration("liveConnector" + 0, 0);
      TransportConfiguration liveConnector1 = getConnectorTransportConfiguration("liveConnector" + 1, 1);

      try
         (
            ServerLocator serverLocator = ActiveMQClient.createServerLocatorWithoutHA(liveConnector0)
         ) {
         server0.start();
         server1.start();
         ClientSessionFactory sessionFactory0 = serverLocator.createSessionFactory(liveConnector0);
         waitForRemoteBackup(sessionFactory0, 10);
         ClientSessionFactory sessionFactory1 = serverLocator.createSessionFactory(liveConnector1);
         waitForRemoteBackup(sessionFactory1, 10);
         Topology topology = serverLocator.getTopology();
         Collection<TopologyMemberImpl> members = topology.getMembers();
         Assert.assertEquals(members.size(), 2);
         Map<String, ActiveMQServer> backupServers0 = server0.getClusterManager().getHAManager().getBackupServers();
         Assert.assertEquals(backupServers0.size(), 1);
         Map<String, ActiveMQServer> backupServers1 = server1.getClusterManager().getHAManager().getBackupServers();
         Assert.assertEquals(backupServers1.size(), 1);
         ActiveMQServer backupServer0 = backupServers0.values().iterator().next();
         ActiveMQServer backupServer1 = backupServers1.values().iterator().next();
         waitForRemoteBackupSynchronization(backupServer0);
         waitForRemoteBackupSynchronization(backupServer1);
         Assert.assertEquals(server0.getNodeID(), backupServer1.getNodeID());
         Assert.assertEquals(server1.getNodeID(), backupServer0.getNodeID());
         Set<TransportConfiguration> backupAcceptors0 = backupServer0.getConfiguration().getAcceptorConfigurations();
         Assert.assertEquals(0, backupAcceptors0.size());
         Set<TransportConfiguration> backupAcceptors1 = backupServer1.getConfiguration().getAcceptorConfigurations();
         Assert.assertEquals(0, backupAcceptors1.size());
         Map<String, TransportConfiguration> connectorConfigurations0 = backupServer0.getConfiguration().getConnectorConfigurations();
         Assert.assertEquals(2, connectorConfigurations0.size());
         Assert.assertEquals("61616", connectorConfigurations0.get("liveConnector0").getParams().get("port"));
         Assert.assertEquals("61617", connectorConfigurations0.get("remoteConnector0").getParams().get("port"));
         Map<String, TransportConfiguration> connectorConfigurations1 = backupServer1.getConfiguration().getConnectorConfigurations();
         Assert.assertEquals(2, connectorConfigurations1.size());
         Assert.assertEquals("61617", connectorConfigurations1.get("liveConnector1").getParams().get("port"));
         Assert.assertEquals("61616", connectorConfigurations1.get("remoteConnector1").getParams().get("port"));
         if (!replicated) {
            Assert.assertEquals(server0.getConfiguration().getJournalDirectory(), backupServer1.getConfiguration().getJournalDirectory());
            Assert.assertEquals(server0.getConfiguration().getBindingsDirectory(), backupServer1.getConfiguration().getBindingsDirectory());
            Assert.assertEquals(server0.getConfiguration().getLargeMessagesDirectory(), backupServer1.getConfiguration().getLargeMessagesDirectory());
            Assert.assertEquals(server0.getConfiguration().getPagingDirectory(), backupServer1.getConfiguration().getPagingDirectory());
            Assert.assertEquals(server1.getConfiguration().getJournalDirectory(), backupServer0.getConfiguration().getJournalDirectory());
            Assert.assertEquals(server1.getConfiguration().getBindingsDirectory(), backupServer0.getConfiguration().getBindingsDirectory());
            Assert.assertEquals(server1.getConfiguration().getLargeMessagesDirectory(), backupServer0.getConfiguration().getLargeMessagesDirectory());
            Assert.assertEquals(server1.getConfiguration().getPagingDirectory(), backupServer0.getConfiguration().getPagingDirectory());
         } else {
            Assert.assertNotEquals(server0.getConfiguration().getJournalDirectory(), backupServer1.getConfiguration().getJournalDirectory());
            Assert.assertNotEquals(server0.getConfiguration().getBindingsDirectory(), backupServer1.getConfiguration().getBindingsDirectory());
            Assert.assertNotEquals(server0.getConfiguration().getLargeMessagesDirectory(), backupServer1.getConfiguration().getLargeMessagesDirectory());
            Assert.assertNotEquals(server0.getConfiguration().getPagingDirectory(), backupServer1.getConfiguration().getPagingDirectory());
            Assert.assertNotEquals(server1.getConfiguration().getJournalDirectory(), backupServer0.getConfiguration().getJournalDirectory());
            Assert.assertNotEquals(server1.getConfiguration().getBindingsDirectory(), backupServer0.getConfiguration().getBindingsDirectory());
            Assert.assertNotEquals(server1.getConfiguration().getLargeMessagesDirectory(), backupServer0.getConfiguration().getLargeMessagesDirectory());
            Assert.assertNotEquals(server1.getConfiguration().getPagingDirectory(), backupServer0.getConfiguration().getPagingDirectory());
         }
      } finally {
         try {
            server0.stop();
         } catch (Throwable e) {
            e.printStackTrace();
         }
         server1.stop();
      }
   }

   @Test
   public void testSimpleDistributionOfBackupsMaxBackupsExceeded() throws Exception {
      ActiveMQServer server0 = createServer(0, 1, false);
      ActiveMQServer server1 = createServer(1, 0, false);
      ActiveMQServer server2 = createServer(2, 0, false);
      ActiveMQServer server3 = createServer(3, 0, false);
      TransportConfiguration liveConnector0 = getConnectorTransportConfiguration("liveConnector" + 0, 0);
      TransportConfiguration liveConnector1 = getConnectorTransportConfiguration("liveConnector" + 1, 1);
      TransportConfiguration liveConnector2 = getConnectorTransportConfiguration("liveConnector" + 2, 2);
      TransportConfiguration liveConnector3 = getConnectorTransportConfiguration("liveConnector" + 3, 3);

      try
         (
            ServerLocator serverLocator = ActiveMQClient.createServerLocatorWithoutHA(liveConnector0)
         ) {
         server0.start();
         server1.start();
         ClientSessionFactory sessionFactory0 = serverLocator.createSessionFactory(liveConnector0);
         waitForRemoteBackup(sessionFactory0, 10);
         ClientSessionFactory sessionFactory1 = serverLocator.createSessionFactory(liveConnector1);
         waitForRemoteBackup(sessionFactory1, 10);
         Topology topology = serverLocator.getTopology();
         Collection<TopologyMemberImpl> members = topology.getMembers();
         Assert.assertEquals(members.size(), 2);
         Map<String, ActiveMQServer> backupServers0 = server0.getClusterManager().getHAManager().getBackupServers();
         Assert.assertEquals(backupServers0.size(), 1);
         Map<String, ActiveMQServer> backupServers1 = server1.getClusterManager().getHAManager().getBackupServers();
         Assert.assertEquals(backupServers1.size(), 1);
         ActiveMQServer backupServer0 = backupServers0.values().iterator().next();
         ActiveMQServer backupServer1 = backupServers1.values().iterator().next();
         waitForRemoteBackupSynchronization(backupServer0);
         waitForRemoteBackupSynchronization(backupServer1);
         Assert.assertEquals(server0.getNodeID(), backupServer1.getNodeID());
         Assert.assertEquals(server1.getNodeID(), backupServer0.getNodeID());
         server2.start();
         //just give server2 time to try both server 0 and 1
         ClientSessionFactory sessionFactory2 = serverLocator.createSessionFactory(liveConnector2);
         server3.start();
         ClientSessionFactory sessionFactory3 = serverLocator.createSessionFactory(liveConnector3);
         waitForRemoteBackup(sessionFactory2, 10);
         waitForRemoteBackup(sessionFactory3, 10);
         Assert.assertEquals(members.size(), 2);
         Map<String, ActiveMQServer> backupServers2 = server2.getClusterManager().getHAManager().getBackupServers();
         Assert.assertEquals(backupServers2.size(), 1);
         Map<String, ActiveMQServer> backupServers3 = server3.getClusterManager().getHAManager().getBackupServers();
         Assert.assertEquals(backupServers3.size(), 1);
         ActiveMQServer backupServer2 = backupServers2.values().iterator().next();
         ActiveMQServer backupServer3 = backupServers3.values().iterator().next();
         waitForRemoteBackupSynchronization(backupServer2);
         waitForRemoteBackupSynchronization(backupServer3);
         Assert.assertEquals(server0.getNodeID(), backupServer1.getNodeID());
         Assert.assertEquals(server1.getNodeID(), backupServer0.getNodeID());
         Assert.assertEquals(server2.getNodeID(), backupServer3.getNodeID());
         Assert.assertEquals(server3.getNodeID(), backupServer2.getNodeID());
      } finally {
         server0.stop();
         server1.stop();
         server2.stop();
         server3.stop();
      }
   }

   private ActiveMQServer createServer(int node, int remoteNode, boolean scaleDown) throws Exception {
      TransportConfiguration liveConnector = getConnectorTransportConfiguration("liveConnector" + node, node);
      TransportConfiguration remoteConnector = getConnectorTransportConfiguration("remoteConnector" + node, remoteNode);
      TransportConfiguration liveAcceptor = getAcceptorTransportConfiguration(node);
      Configuration liveConfiguration = getConfiguration("server" + node, scaleDown, liveConnector, liveAcceptor, remoteConnector);
      ActiveMQServer server = new ActiveMQServerImpl(liveConfiguration);
      server.setIdentity("server" + node);
      return server;
   }

   private Configuration getConfiguration(String identity,
                                          boolean scaleDown,
                                          TransportConfiguration liveConnector,
                                          TransportConfiguration liveAcceptor,
                                          TransportConfiguration... otherLiveNodes) throws Exception {
      Configuration configuration = createDefaultInVMConfig().clearAcceptorConfigurations().addAcceptorConfiguration(liveAcceptor).addConnectorConfiguration(liveConnector.getName(), liveConnector).setJournalDirectory(getJournalDir() + identity).setBindingsDirectory(getBindingsDir() + identity).setLargeMessagesDirectory(getLargeMessagesDir() + identity).setPagingDirectory(getPageDir() + identity).addQueueConfiguration(new CoreQueueConfiguration().setAddress("testQueue").setName("testQueue"));

      List<String> transportConfigurationList = new ArrayList<>();

      final ColocatedPolicyConfiguration haPolicy = new ColocatedPolicyConfiguration();
      for (TransportConfiguration otherLiveNode : otherLiveNodes) {
         configuration.addConnectorConfiguration(otherLiveNode.getName(), otherLiveNode);
         transportConfigurationList.add(otherLiveNode.getName());
         haPolicy.getExcludedConnectors().add(otherLiveNode.getName());
      }

      String[] input = new String[transportConfigurationList.size()];
      transportConfigurationList.toArray(input);

      configuration.addClusterConfiguration(basicClusterConnectionConfig(liveConnector.getName(), input));
      haPolicy.setBackupPortOffset(100);
      haPolicy.setBackupRequestRetries(-1);
      haPolicy.setBackupRequestRetryInterval(500);
      haPolicy.setMaxBackups(1);
      haPolicy.setRequestBackup(true);
      configuration.setHAPolicyConfiguration(haPolicy);
      if (!replicated) {
         SharedStoreMasterPolicyConfiguration ssmc = new SharedStoreMasterPolicyConfiguration();
         SharedStoreSlavePolicyConfiguration sssc = new SharedStoreSlavePolicyConfiguration();
         haPolicy.setLiveConfig(ssmc);
         haPolicy.setBackupConfig(sssc);
         if (scaleDown) {
            sssc.setScaleDownConfiguration(new ScaleDownConfiguration());
         }
      } else {
         ReplicatedPolicyConfiguration rpc = new ReplicatedPolicyConfiguration();
         ReplicaPolicyConfiguration rpc2 = new ReplicaPolicyConfiguration();
         haPolicy.setLiveConfig(rpc);
         haPolicy.setBackupConfig(rpc2);
         if (scaleDown) {
            rpc2.setScaleDownConfiguration(new ScaleDownConfiguration());
         }
      }

      return configuration;
   }

   private TransportConfiguration getAcceptorTransportConfiguration(int node) {
      HashMap<String, Object> params = new HashMap<>();
      params.put("port", "" + (61616 + node));
      return new TransportConfiguration(NETTY_ACCEPTOR_FACTORY, params);
   }

   private TransportConfiguration getConnectorTransportConfiguration(String name, int node) {
      HashMap<String, Object> params = new HashMap<>();
      params.put("port", "" + (61616 + node));
      return new TransportConfiguration(NETTY_CONNECTOR_FACTORY, params, name);
   }
}
