/*
  Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.

  The MySQL Connector/J is licensed under the terms of the GPLv2
  <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most MySQL Connectors.
  There are special exceptions to the terms and conditions of the GPLv2 as it is applied to
  this software, see the FOSS License Exception
  <http://www.mysql.com/about/legal/licensing/foss-exception.html>.

  This program is free software; you can redistribute it and/or modify it under the terms
  of the GNU General Public License as published by the Free Software Foundation; version 2
  of the License.

  This program 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 General Public License for more details.

  You should have received a copy of the GNU General Public License along with this
  program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth
  Floor, Boston, MA 02110-1301  USA

 */

package testsuite.fabric.jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

import com.mysql.fabric.jdbc.FabricMySQLConnection;
import com.mysql.fabric.jdbc.FabricMySQLDataSource;

import testsuite.fabric.BaseFabricTestCase;

public class TestBasicConnection extends BaseFabricTestCase {

    public TestBasicConnection() throws Exception {
        super();
    }

    /**
     * Test that we can make a connection with a URL, given a server group name
     */
    public void testConnectionUrl() throws Exception {
        if (!this.isSetForFabricTest) {
            return;
        }
        String url = this.baseJdbcUrl + "&fabricServerGroup=fabric_test1_global";
        Connection c = DriverManager.getConnection(url, this.username, this.password);
        ResultSet rs = c.createStatement().executeQuery("select user()");
        rs.next();
        String userFromDb = rs.getString(1).split("@")[0];
        assertEquals(this.username, userFromDb);
        rs.close();
        c.close();
    }

    /**
     * Test that we can connect with the data source, given a server group name
     */
    public void testConnectionDataSource() throws Exception {
        if (!this.isSetForFabricTest) {
            return;
        }
        FabricMySQLDataSource ds = getNewDefaultDataSource();
        ds.setFabricServerGroup("fabric_test1_global");
        Connection c = ds.getConnection(this.username, this.password);
        // same as above
        ResultSet rs = c.createStatement().executeQuery("select user()");
        rs.next();
        String userFromDb = rs.getString(1).split("@")[0];
        assertEquals(this.username, userFromDb);
        rs.close();
        c.close();
    }

    /**
     * Test that the local cache is refreshed after expired TTL. Bug#21296840 / Bug#17910835. This test connects to the master of "ha_config1_group" and
     * requires the master to be changed during the wait period. The Fabric must also be setup to communicate a TTL of less than 10s to the client.
     */
    public void manualTestRefreshFabricStateCache() throws Exception {
        if (!this.isSetForFabricTest) {
            return;
        }

        FabricMySQLConnection conn = (FabricMySQLConnection) getNewDefaultDataSource().getConnection(this.username, this.password);
        conn.setServerGroupName("ha_config1_group");
        conn.setReadOnly(false);
        conn.setAutoCommit(false);

        Statement stmt = conn.createStatement();

        ResultSet rs = stmt.executeQuery("show variables like 'server_uuid'");
        rs.next();
        String firstServerUuid = rs.getString(2);
        rs.close();
        conn.commit();

        // sleep for TTL+1 secs
        int seconds = 10;
        System.err.println("Waiting " + seconds + " seconds for new master to be chosen");
        Thread.sleep((1 + seconds) * 1000);

        // force the LB proxy to pick a new connection
        conn.rollback();

        // verify change is seen by client
        rs = stmt.executeQuery("show variables like 'server_uuid'");
        rs.next();
        String secondServerUuid = rs.getString(2);
        rs.close();

        System.err.println("firstServerUuid=" + firstServerUuid + "\nsecondServerUuid=" + secondServerUuid);
        if (firstServerUuid.equals(secondServerUuid)) {
            fail("Server ID should change to reflect new topology");
        }

        conn.close();
    }
}