/*
 *
 * 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;

import static org.junit.Assert.*;

import java.sql.*;
import java.util.Arrays;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;

public class ReconnectionStateMaxAllowedStatement extends BaseTest {

  @BeforeClass()
  public static void initClass() throws SQLException {
    afterClass();
    try (Statement stmt = sharedConnection.createStatement()) {
      stmt.execute("CREATE TABLE foo (x longblob)");
      stmt.execute("FLUSH TABLES");
    }
  }

  @AfterClass
  public static void afterClass() throws SQLException {
    try (Statement stmt = sharedConnection.createStatement()) {
      stmt.execute("DROP TABLE IF EXISTS foo");
    }
  }

  @Test
  public void isolationLevelResets() throws SQLException {
    try (Connection connection = setConnection()) {
      long max = maxPacket(connection);
      if (max > Integer.MAX_VALUE - 10) {
        fail("max_allowed_packet too high for this test");
      }
      connection.setTransactionIsolation(Connection.TRANSACTION_READ_UNCOMMITTED);

      assertEquals("READ-UNCOMMITTED", level((MariaDbConnection) connection));
      try (PreparedStatement st = connection.prepareStatement("insert into foo (?)")) {
        st.setBytes(1, data((int) (max + 10)));
        st.execute();
        fail();
      } catch (SQLException e) {
        assertTrue(e.getMessage().contains("max_allowed_packet"));
        // we still have a working connection
        assertTrue(connection.isValid(0));
        // our isolation level must have stay the same
        assertEquals("READ-UNCOMMITTED", level((MariaDbConnection) connection));
      }
    }
  }

  private String level(MariaDbConnection connection) throws SQLException {
    String sql = "SELECT @@tx_isolation";
    if (!connection.isServerMariaDb() && connection.versionGreaterOrEqual(8, 0, 3)) {
      sql = "SELECT @@transaction_isolation";
    }
    try (ResultSet rs = connection.prepareStatement(sql).executeQuery()) {
      assertTrue(rs.next());
      return rs.getString(1);
    }
  }

  private long maxPacket(Connection connection) throws SQLException {
    try (ResultSet rs = connection.prepareStatement("select @@max_allowed_packet").executeQuery()) {
      assertTrue(rs.next());
      return rs.getLong(1);
    }
  }

  private byte[] data(int size) {
    byte[] data = new byte[size];
    Arrays.fill(data, (byte) 'a');
    return data;
  }
}