/*
 *
 * MariaDB Client for Java
 *
 * Copyright (c) 2012-2014 Monty Program Ab.
 * Copyright (c) 2015-2017 MariaDB 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;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.sql.ClientInfoStatus;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLClientInfoException;
import java.sql.SQLException;
import java.sql.SQLPermission;
import java.sql.Statement;
import java.util.Arrays;
import java.util.Map;
import java.util.Properties;
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.Executor;
import org.junit.Assert;
import org.junit.Assume;
import org.junit.AssumptionViolatedException;
import org.junit.BeforeClass;
import org.junit.Test;
import org.mariadb.jdbc.internal.util.scheduler.SchedulerServiceProviderHolder;

public class ConnectionTest extends BaseTest {

  /**
   * Initialisation.
   *
   * @throws SQLException exception
   */
  @BeforeClass()
  public static void initClass() throws SQLException {
    createTable("dummy", "a BLOB");
  }

  /**
   * Conj-166. Connection error code must be thrown
   *
   * @throws SQLException exception
   */
  @Test
  public void testAccessDeniedErrorCode() throws SQLException {
    try {
      DriverManager.getConnection("jdbc:mariadb://" + ((hostname != null) ? hostname : "localhost")
          + ":" + port + "/" + database + "?user=foo");
      fail();
    } catch (SQLException e) {
      switch (e.getErrorCode()) {
        case (1524):
          //GSSAPI plugin not loaded
          assertTrue("HY000".equals(e.getSQLState()));
          break;

        case (1045):
          assertTrue("28000".equals(e.getSQLState()));
          break;

        case (1044):
          //mysql
          assertTrue("42000".equals(e.getSQLState()));
          break;

        default:
          e.printStackTrace();
          break;
      }
    }
  }

  /**
   * Conj-75 (corrected with CONJ-156) Needs permission java.sql.SQLPermission "abort" or will be
   * skipped.
   *
   * @throws SQLException exception
   */
  @Test
  public void abortTest() throws SQLException {
    try (Connection connection = setConnection()) {

      try (Statement stmt = connection.createStatement()) {

        SQLPermission sqlPermission = new SQLPermission("callAbort");
        SecurityManager securityManager = System.getSecurityManager();
        if (securityManager != null) {
          try {
            securityManager.checkPermission(sqlPermission);
          } catch (SecurityException se) {
            System.out.println("test 'abortTest' skipped  due to missing policy");
            return;
          }
        }

        Executor executor = Runnable::run;

        connection.abort(executor);
        assertTrue(connection.isClosed());
        try {
          stmt.executeQuery("SELECT 1");
          fail();
        } catch (SQLException sqle) {
          //normal exception
        }
      }
    }
  }

  /**
   * Conj-121: implemented Connection.getNetworkTimeout and Connection.setNetworkTimeout.
   *
   * @throws SQLException exception
   */
  @Test
  public void networkTimeoutTest() throws SQLException {
    try (Connection connection = setConnection()) {

      int timeout = 1000;
      SQLPermission sqlPermission = new SQLPermission("setNetworkTimeout");
      SecurityManager securityManager = System.getSecurityManager();
      if (securityManager != null) {
        try {
          securityManager.checkPermission(sqlPermission);
        } catch (SecurityException se) {
          System.out.println("test 'setNetworkTimeout' skipped  due to missing policy");
          return;
        }
      }
      Executor executor = Runnable::run;
      try {
        connection.setNetworkTimeout(executor, timeout);
      } catch (SQLException sqlex) {
        sqlex.printStackTrace();
        fail(sqlex.getMessage());
      }

      connection.isValid(2);
      assertEquals(timeout, connection.getNetworkTimeout());

      try {
        int networkTimeout = connection.getNetworkTimeout();
        assertEquals(timeout, networkTimeout);
      } catch (SQLException sqlex) {
        sqlex.printStackTrace();
        fail(sqlex.getMessage());
      }
      try {
        connection.createStatement().execute("select sleep(2)");
        fail("Network timeout is " + timeout / 1000 + "sec, but slept for 2sec");
      } catch (SQLException sqlex) {
        assertTrue(connection.isClosed());
      }
    }
  }

  /**
   * Conj-120 Fix Connection.isValid method.
   */
  @Test
  public void isValidShouldThrowExceptionWithNegativeTimeout() {
    try {
      sharedConnection.isValid(-1);
      fail("The above row should have thrown an SQLException");
    } catch (SQLException sqlex) {
      assertTrue(sqlex.getMessage().contains("negative"));
    }
  }

  /**
   * Conj-116: Make SQLException prettier when too large stream is sent to the server.
   *
   * @throws Throwable                 exception
   */
  @Test
  public void checkMaxAllowedPacket() throws Throwable {
    Statement statement = sharedConnection.createStatement();
    ResultSet rs = statement.executeQuery("show variables like 'max_allowed_packet'");
    assertTrue(rs.next());
    int maxAllowedPacket = rs.getInt(2);

    //Create a SQL stream bigger than maxAllowedPacket
    StringBuilder sb = new StringBuilder();
    String rowData = "('this is a dummy row values')";
    int rowsToWrite = (maxAllowedPacket / rowData.getBytes("UTF-8").length) + 1;
    try {
      for (int row = 1; row <= rowsToWrite; row++) {
        if (row >= 2) {
          sb.append(", ");
        }
        sb.append(rowData);
      }
      statement.executeUpdate("INSERT INTO dummy VALUES " + sb.toString());
      fail("The previous statement should throw an SQLException");
    } catch (OutOfMemoryError e) {
      System.out.println("skip test 'maxAllowedPackedExceptionIsPrettyTest' - not enough memory");
      Assume.assumeNoException(e);
    } catch (SQLException e) {
      assertTrue(e.getMessage().contains("max_allowed_packet"));
    } catch (Exception e) {
      fail("The previous statement should throw an SQLException not a general Exception");
    }

    statement.execute("select count(*) from dummy"); //check that the connection is still working

    //added in CONJ-151 to check the 2 different type of query implementation
    PreparedStatement preparedStatement = sharedConnection
        .prepareStatement("INSERT INTO dummy VALUES (?)");
    try {
      byte[] arr = new byte[maxAllowedPacket + 1000];
      Arrays.fill(arr, (byte) 'a');
      preparedStatement.setBytes(1, arr);
      preparedStatement.addBatch();
      preparedStatement.executeBatch();
      fail("The previous statement should throw an SQLException");
    } catch (OutOfMemoryError e) {
      System.out
          .println("skip second test 'maxAllowedPackedExceptionIsPrettyTest' - not enough memory");
      Assume.assumeNoException(e);
    } catch (SQLException e) {
      assertTrue(e.getMessage().contains("max_allowed_packet"));
    } catch (Exception e) {
      e.printStackTrace();
      fail("The previous statement should throw an SQLException not a general Exception");
    } finally {
      statement.execute("select count(*) from dummy"); //to check that connection is open
    }
  }


  @Test
  public void isValidTestWorkingConnection() throws SQLException {
    assertTrue(sharedConnection.isValid(0));
  }

  /**
   * CONJ-120 Fix Connection.isValid method
   *
   * @throws SQLException exception
   */
  @Test
  public void isValidClosedConnection() throws SQLException {
    try (Connection connection = setConnection()) {
      connection.close();
      boolean isValid = connection.isValid(0);
      assertFalse(isValid);
    }
  }

  /**
   * CONJ-120 Fix Connection.isValid method
   *
   * @throws SQLException         exception
   * @throws InterruptedException exception
   */
  @Test
  public void isValidConnectionThatTimesOutByServer() throws SQLException, InterruptedException {
    Assume.assumeFalse(sharedIsAurora());
    try (Connection connection = setConnection()) {
      try (Statement statement = connection.createStatement()) {
        statement.execute("set session wait_timeout=1");
        Thread.sleep(3000); // Wait for the server to kill the connection
        boolean isValid = connection.isValid(0);
        assertFalse(isValid);
      }
    }
  }

  /**
   * CONJ-363 : follow JDBC connection client infos rules.
   *
   * @throws Exception if any occur.
   */
  @Test
  public void testConnectionClientInfos() throws Exception {
    assertEquals(null, sharedConnection.getClientInfo("ApplicationName"));
    assertEquals(null, sharedConnection.getClientInfo("ClientUser"));
    assertEquals(null, sharedConnection.getClientInfo("ClientHostname"));

    try {
      sharedConnection.getClientInfo("otherName");
      fail("Must have throw exception since name wasn't correct");
    } catch (SQLException sqlEx) {
      assertTrue(sqlEx.getMessage().contains("name must be"));
    }

    Properties properties = sharedConnection.getClientInfo();
    assertEquals(null, properties.get("ApplicationName"));
    assertEquals(null, properties.get("ClientUser"));
    assertEquals(null, properties.get("ClientHostname"));

    sharedConnection.setClientInfo("ClientHostname", "testHostName");
    assertEquals("testHostName", sharedConnection.getClientInfo("ClientHostname"));

    sharedConnection.setClientInfo("ClientHostname", null);
    assertNull(sharedConnection.getClientInfo("ClientHostname"));

    sharedConnection.setClientInfo("ClientHostname", "");
    assertEquals("", sharedConnection.getClientInfo("ClientHostname"));

    properties = new Properties();
    properties.setProperty("ApplicationName", "testDriver");
    properties.setProperty("ClientUser", "testClientUser");
    properties.setProperty("NotPermitted", "blabla");
    properties.setProperty("NotPermitted2", "blabla");

    try {
      sharedConnection.setClientInfo(properties);
    } catch (SQLClientInfoException sqle) {
      assertEquals(
          "setClientInfo errors : the following properties where not set :{NotPermitted,NotPermitted2}",
          sqle.getMessage());
      Map<String, ClientInfoStatus> failedProperties = sqle.getFailedProperties();
      assertTrue(failedProperties.containsKey("NotPermitted"));
      assertTrue(failedProperties.containsKey("NotPermitted2"));
      assertEquals(2, failedProperties.size());
    }

    assertEquals("testDriver", sharedConnection.getClientInfo("ApplicationName"));
    assertEquals("testClientUser", sharedConnection.getClientInfo("ClientUser"));
    assertEquals(null, sharedConnection.getClientInfo("ClientHostname"));

    sharedConnection.setClientInfo("ClientUser", "otherValue");

    assertEquals("testDriver", sharedConnection.getClientInfo("ApplicationName"));
    assertEquals("otherValue", sharedConnection.getClientInfo("ClientUser"));
    assertEquals(null, sharedConnection.getClientInfo("ClientHostname"));

    try {
      sharedConnection.setClientInfo("NotPermitted", "otherValue");
      fail("Must have send an exception");
    } catch (SQLClientInfoException sqle) {
      assertEquals(
          "setClientInfo() parameters can only be \"ApplicationName\",\"ClientUser\" or \"ClientHostname\", "
              + "but was : NotPermitted", sqle.getMessage());
      Map<String, ClientInfoStatus> failedProperties = sqle.getFailedProperties();
      assertTrue(failedProperties.containsKey("NotPermitted"));
      assertEquals(1, failedProperties.size());
    }
  }

  @Test
  public void retrieveCatalogTest() throws SQLException {
    final String db = sharedConnection.getCatalog();
    Statement stmt = sharedConnection.createStatement();

    stmt.execute("CREATE DATABASE gogogo");
    stmt.execute("USE gogogo");
    String db2 = sharedConnection.getCatalog();
    assertEquals("gogogo", db2);
    assertNotEquals(db, db2);
    stmt.execute("DROP DATABASE gogogo");

    String db3 = sharedConnection.getCatalog();
    assertNull(db3);
    stmt.execute("USE " + db);

  }


  @Test(timeout = 15_000L)
  public void testValidTimeout() throws Throwable {
    Assume.assumeFalse(sharedIsAurora());
    try (Connection connection = createProxyConnection(new Properties())) {

      assertTrue(connection.isValid(1)); //1 second

      //ensuring to reactivate proxy
      Timer timer = new Timer();
      timer.schedule(new TimerTask() {
        @Override
        public void run() {
          removeDelayProxy();
        }
      }, 1000);

      delayProxy(200);
      assertTrue(connection.isValid(1)); //1 second
      Thread.sleep(2000);
    } finally {
      closeProxy();
    }
  }

  @Test(timeout = 15_000L)
  public void testValidFailedTimeout() throws Throwable {
    Properties properties = new Properties();
    properties.setProperty("usePipelineAuth", "false");
    try (Connection connection = createProxyConnection(properties)) {

      assertTrue(connection.isValid(1)); //1 second

      //ensuring to reactivate proxy
      Timer timer = new Timer();
      timer.schedule(new TimerTask() {
        @Override
        public void run() {
          removeDelayProxy();
        }
      }, 2000);

      delayProxy(1500);
      long start = System.currentTimeMillis();
      assertFalse(connection.isValid(1)); //1 second
      assertTrue(System.currentTimeMillis() - start < 1050);
      Thread.sleep(5000);
    } finally {
      closeProxy();
    }
  }

  @Test
  public void standardClose() throws Throwable {
    Connection connection = setConnection();
    Statement stmt = connection.createStatement();
    stmt.setFetchSize(1);
    ResultSet rs = stmt.executeQuery("select * from information_schema.columns as c1");
    assertTrue(rs.next());
    connection.close();
    //must still work
    try {
      assertTrue(rs.next());
      fail();
    } catch (SQLException sqle) {
      assertTrue(sqle.getMessage().contains("Operation not permit on a closed resultSet"));
    }
  }

  @Test(timeout = 5_000L)
  public void abortClose() throws Throwable {
    Connection connection = setConnection();
    Statement stmt = connection.createStatement();
    stmt.setFetchSize(1);
    ResultSet rs = stmt.executeQuery("select * from information_schema.columns as c1, "
        + "information_schema.tables, information_schema.tables as t2");
    assertTrue(rs.next());
    connection.abort(SchedulerServiceProviderHolder.getBulkScheduler());
    //must still work

    Thread.sleep(20);
    try {
      assertTrue(rs.next());
      fail();
    } catch (SQLException sqle) {
      sqle.printStackTrace();
      assertTrue(sqle.getMessage().contains("Operation not permit on a closed resultSet"));
    }
  }

  @Test(timeout = 5_000L)
  public void verificationAbort() throws Throwable {
    Timer timer = new Timer();
    try (Connection connection = setConnection()) {
      timer.schedule(new TimerTask() {
        @Override
        public void run() {
          try {
            connection.abort(SchedulerServiceProviderHolder.getBulkScheduler());
          } catch (SQLException sqle) {
            fail(sqle.getMessage());
          }
        }
      }, 10);

      Statement stmt = connection.createStatement();
      try {
        stmt.executeQuery(
            "select * from information_schema.columns as c1,  information_schema.tables, information_schema.tables as t2");
      } catch (SQLException sqle) {
        assertTrue(sqle.getMessage().contains("Connection has explicitly been closed/aborted"));
      }
    }
  }

  @Test
  public void verificationEd25519AuthPlugin() throws Throwable {
    Assume.assumeTrue(isMariadbServer() && minVersion(10, 2));
    Statement stmt = sharedConnection.createStatement();

    try {
      stmt.execute("INSTALL SONAME 'auth_ed25519'");
    } catch (SQLException sqle) {
      throw new AssumptionViolatedException("server doesn't have ed25519 plugin, cancelling test");
    }
    try {
      stmt.execute("CREATE USER verificationEd25519AuthPlugin@'%' IDENTIFIED "
          + "VIA ed25519 USING 'ZIgUREUg5PVgQ6LskhXmO+eZLS0nC8be6HPjYWR4YJY'");
    } catch (SQLException sqle) {
      //already existing
    }
    stmt.execute("GRANT ALL on " + database + ".* to verificationEd25519AuthPlugin@'%'");

    String url = "jdbc:mariadb://" + hostname + ((port == 0) ? "" : ":" + port) + "/" + database
        + "?user=verificationEd25519AuthPlugin&password=secret&debug=true";

    try (Connection connection = openNewConnection(url)) {
      //must have succeed
    }
    stmt.execute("drop user verificationEd25519AuthPlugin@'%'");
  }


  private void initializeDns(String host) {
    try {
      InetAddress.getByName(host);
      fail();
    } catch (UnknownHostException e) {
      //normal error
    }

  }

  @Test
  public void loopSleepTest() throws Exception {
    //appveyor vm are very slow, cannot compare time
    Assume.assumeTrue(System.getenv("APPVEYOR") == null);

    //initialize DNS to avoid having wrong timeout
    initializeDns("host1");
    initializeDns("host2");
    initializeDns("host1.555-rds.amazonaws.com");

    //failover
    checkConnection(
        "jdbc:mariadb:failover://host1,host2/testj?user=root&retriesAllDown=20&connectTimeout=20",
        2000, 3200);
    //replication
    checkConnection(
        "jdbc:mariadb:replication://host1,host2/testj?user=root&retriesAllDown=20&connectTimeout=20",
        2000, 3200);
    //aurora - no cluster end point
    checkConnection(
        "jdbc:mariadb:aurora://host1,host2/testj?user=root&retriesAllDown=20&connectTimeout=20",
        2000, 3200);
    //aurora - using cluster end point
    checkConnection(
        "jdbc:mariadb:aurora://host1.555-rds.amazonaws.com/testj?user=root&retriesAllDown=20&connectTimeout=20",
        4500, 10000);

  }

  private void checkConnection(String conUrl, int min, int max) {
    long start = System.currentTimeMillis();
    try (Connection connection = DriverManager.getConnection(conUrl)) {
      fail();
    } catch (SQLException e) {
      //excepted exception
      //since retriesAllDown is = 20 , that means 10 entire loop with 250ms sleep
      // first loop has not sleep, last too, so 8 * 250 = 2s
      System.out.println(System.currentTimeMillis() - start);
      assertTrue(System.currentTimeMillis() - start > min);
      assertTrue(System.currentTimeMillis() - start < max);
    }
  }

  @Test
  public void slaveDownConnection() throws SQLException {
    String url = "jdbc:mariadb:replication//" + hostname + ((port == 0) ? "" : ":" + port)
        + "," + hostname + ":8888"
        + "/" + database + "?user=" + username
        + ((password != null) ? "&password=" + password : "")
        + "&retriesAllDown=10&allowMasterDownConnection";
    try (Connection connection = DriverManager.getConnection(url)) {
      Assert.assertFalse(connection.isReadOnly());
      connection.isValid(0);
      try (PreparedStatement preparedStatement = connection.prepareStatement("SELECT 1")) {
        preparedStatement.executeQuery();
      }
      connection.setReadOnly(true);
      try (PreparedStatement preparedStatement = connection.prepareStatement("SELECT 1")) {
        preparedStatement.executeQuery();
      }
    }
  }
}