/*
 *
 * MariaDB Client for Java
 *
 * Copyright (c) 2012-2014 Monty Program Ab.
 * Copyright (c) 2015-2020 MariaDB Corporation Ab.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along
 * with this library; if not, write to Monty Program Ab info@montyprogram.com.
 *
 * This particular MariaDB Client for Java file is work
 * derived from a Drizzle-JDBC. Drizzle-JDBC file which is covered by subject to
 * the following copyright and notice provisions:
 *
 * Copyright (c) 2009-2011, Marcus Eriksson
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this list
 * of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice, this
 * list of conditions and the following disclaimer in the documentation and/or
 * other materials provided with the distribution.
 *
 * Neither the name of the driver nor the names of its contributors may not be
 * used to endorse or promote products derived from this software without specific
 * prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS  AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE.
 *
 */

package org.mariadb.jdbc.failover;

import static org.junit.Assert.*;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Set;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import org.junit.Assume;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.mariadb.jdbc.BaseTest;
import org.mariadb.jdbc.HostAddress;
import org.mariadb.jdbc.MariaDbConnection;
import org.mariadb.jdbc.UrlParser;
import org.mariadb.jdbc.internal.protocol.Protocol;
import org.mariadb.jdbc.internal.util.constant.HaMode;
import org.mariadb.jdbc.internal.util.scheduler.MariaDbThreadFactory;

/**
 * Test for sequential connection exemple mvn test
 * -DdefaultGaleraUrl=jdbc:mariadb:sequential//localhost:3306,localhost:3307/test?user=root.
 */
public class SequentialFailoverTest extends BaseMultiHostTest {

  /** Initialisation. */
  @BeforeClass()
  public static void beforeClass2() {
    proxyUrl = proxySequentialUrl;
  }

  /** Initialisation. */
  @Before
  public void init() {
    defaultUrl = initialSequentialUrl;
    currentType = HaMode.SEQUENTIAL;
  }

  @Test
  public void connectionSequenceAndBack() throws Throwable {
    Assume.assumeTrue(!BaseTest.isMaxscale());
    TcpProxy proxy1 = new TcpProxy(hostname, port);
    TcpProxy proxy2 = new TcpProxy(hostname, port);
    String connString =
        String.format(
            "jdbc:mariadb:sequential://localhost:%s,localhost:%s/%s?user=%s&password=%s&restrictedAuth=none&%s&retriesAllDown=2&connectTimeout=500",
            proxy1.getLocalPort(),
            proxy2.getLocalPort(),
            database,
            username,
            password,
            defaultOther);
    try (MariaDbConnection con = (MariaDbConnection) DriverManager.getConnection(connString)) {
      Statement stmt = con.createStatement();
      stmt.executeQuery("SELECT 1");
      assertEquals(proxy1.getLocalPort(), con.__test_host().port);
      proxy1.stop();
      stmt.executeQuery("SELECT 1");
      assertEquals(proxy2.getLocalPort(), con.__test_host().port);
      proxy1.restart();
      proxy2.stop();
      stmt.executeQuery("SELECT 1");
      assertEquals(proxy1.getLocalPort(), con.__test_host().port);
    } finally {
      proxy1.stop();
      proxy2.stop();
    }

    proxy2.restart();
    try (MariaDbConnection con = (MariaDbConnection) DriverManager.getConnection(connString)) {
      Statement stmt = con.createStatement();

      stmt.executeQuery("SELECT 1");
      assertEquals(proxy2.getLocalPort(), con.__test_host().port);

      proxy1.restart();
      stmt.executeQuery("SELECT 1");
      assertEquals(proxy2.getLocalPort(), con.__test_host().port);

      proxy2.stop();
      stmt.executeQuery("SELECT 1");
      assertEquals(proxy1.getLocalPort(), con.__test_host().port);

      proxy1.stop();
      try {
        stmt.executeQuery("SELECT 1");
        fail("must have thrown error");
      } catch (Exception e) {
        // expected error
      }

    } finally {
      proxy1.stop();
      proxy2.stop();
    }
  }

  @Test
  public void connectionOrder() throws Throwable {
    Assume.assumeTrue(initialSequentialUrl != null);

    Assume.assumeTrue(!initialGaleraUrl.contains("failover"));
    UrlParser urlParser = UrlParser.parse(initialGaleraUrl);
    for (int i = 0; i < urlParser.getHostAddresses().size(); i++) {
      int serverNb;
      try (Connection connection = getNewConnection(true)) {
        serverNb = getServerId(connection);
        assertTrue(serverNb == i + 1);
      }
      stopProxy(serverNb);
    }
  }

  @Test
  public void checkStaticBlacklist() throws Throwable {
    Assume.assumeTrue(initialSequentialUrl != null);
    assureProxy();
    try (Connection connection = getNewConnection("&loadBalanceBlacklistTimeout=500", true)) {
      Statement st = connection.createStatement();

      int firstServerId = getServerId(connection);
      int blackListSize =
          getProtocolFromConnection(connection).getProxy().getListener().getBlacklistKeys().size();
      System.out.println("blackListSize:" + blackListSize);
      stopProxy(firstServerId);

      try {
        st.execute("show variables like 'slow_query_log'");
        fail();
      } catch (SQLException e) {
        // normal exception that permit to blacklist the failing connection.
      }

      // check blacklist size
      try {
        Protocol protocol = getProtocolFromConnection(connection);
        assertEquals(
            blackListSize + 1, protocol.getProxy().getListener().getBlacklistKeys().size());

        // replace proxified HostAddress by normal one
        UrlParser urlParser = UrlParser.parse(defaultUrl);
        protocol
            .getProxy()
            .getListener()
            .addToBlacklist(urlParser.getHostAddresses().get(firstServerId - 1));
      } catch (Throwable e) {
        e.printStackTrace();
        fail();
      }

      // add first Host to blacklist
      Protocol protocol = getProtocolFromConnection(connection);
      ScheduledThreadPoolExecutor scheduler =
          new ScheduledThreadPoolExecutor(
              1, new MariaDbThreadFactory("MariaDB-testable-scheduler"));

      // check blacklist shared
      scheduler.execute(
          new CheckBlacklist(firstServerId, protocol.getProxy().getListener().getBlacklistKeys()));
      scheduler.execute(
          new CheckBlacklist(firstServerId, protocol.getProxy().getListener().getBlacklistKeys()));

      // deterministically execute CheckBlacklists
      scheduler.shutdown();
      scheduler.awaitTermination(10, TimeUnit.SECONDS);
    }
  }

  @Test
  public void testMultiHostWriteOnMaster() {
    Assume.assumeTrue(initialSequentialUrl != null);
    Assume.assumeTrue(initialGaleraUrl != null);
    try (Connection connection = getNewConnection()) {
      Statement stmt = connection.createStatement();
      stmt.execute("drop table  if exists multinode");
      stmt.execute(
          "create table multinode (id int not null primary key auto_increment, test VARCHAR(10))");
    } catch (SQLException sqle) {
      fail("must have worked");
    }
  }

  @Test
  public void pingReconnectAfterRestart() throws Throwable {
    Assume.assumeTrue(initialSequentialUrl != null);
    try (Connection connection = getNewConnection("&retriesAllDown=6", true)) {
      Statement st = connection.createStatement();
      int masterServerId = getServerId(connection);
      stopProxy(masterServerId);

      try {
        st.execute("SELECT 1");
      } catch (SQLException e) {
        // eat exception
      }
      restartProxy(masterServerId);
      long restartTime = System.nanoTime();
      boolean loop = true;
      while (loop) {
        if (!connection.isClosed()) {
          loop = false;
        }
        long duration = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - restartTime);
        if (duration > 15 * 1000) {
          fail();
        }
        Thread.sleep(250);
      }
    }
  }

  protected class CheckBlacklist implements Runnable {

    private final int firstServerId;
    private final Set<HostAddress> blacklistKeys;

    public CheckBlacklist(int firstServerId, Set<HostAddress> blacklistKeys) {
      this.firstServerId = firstServerId;
      this.blacklistKeys = blacklistKeys;
    }

    public void run() {
      try (Connection connection2 = getNewConnection()) {
        int otherServerId = getServerId(connection2);
        assertTrue(otherServerId != firstServerId);
        Protocol protocol = getProtocolFromConnection(connection2);
        assertTrue(
            blacklistKeys.toArray()[0].equals(
                protocol.getProxy().getListener().getBlacklistKeys().toArray()[0]));

      } catch (Throwable e) {
        e.printStackTrace();
        fail();
      }
    }
  }

  class MutableInt {

    private int value = 1; // note that we start at 1 since we're counting

    public void increment() {
      ++value;
    }

    public int get() {
      return value;
    }
  }
}
