/**
 * 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.sqoop.manager.oracle;

import com.cloudera.sqoop.SqoopOptions;
import com.cloudera.sqoop.manager.OracleUtils;
import com.cloudera.sqoop.testutil.CommonArgs;
import com.cloudera.sqoop.testutil.ImportJobTestCase;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.io.FileUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IOUtils;
import org.junit.Test;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Writer;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import static org.junit.Assert.assertEquals;

/**
 * Test various custom splitters for Oracle.
 */
public class OracleSplitterTest extends ImportJobTestCase {

  public static final Log LOG = LogFactory.getLog(
      OracleSplitterTest.class.getName());

  @Override
  protected boolean useHsqldbTestServer() {
    return false;
  }

  @Override
  protected String getConnectString() {
    return OracleUtils.CONNECT_STRING;
  }

  @Override
  protected SqoopOptions getSqoopOptions(Configuration conf) {
    SqoopOptions opts = new SqoopOptions(conf);
    OracleUtils.setOracleAuth(opts);
    return opts;
  }

  @Override
  protected void dropTableIfExists(String table) throws SQLException {
    OracleUtils.dropTable(table, getManager());
  }

  /** the names of the tables we're creating. */
  private List<String> tableNames;

  @Override
  public void tearDown() {
    // Clean up the database on our way out.
    for (String tableName : tableNames) {
      try {
        dropTableIfExists(tableName);
      } catch (SQLException e) {
        LOG.warn("Error trying to drop table '" + tableName
                 + "' on tearDown: " + e);
      }
    }
    super.tearDown();
  }

  protected String [] getArgv(String tableName, String connPropsFileName, String splitByColumn) {
    ArrayList<String> args = new ArrayList<String>();

    CommonArgs.addHadoopFlags(args);

    args.add("--connect");
    args.add(getConnectString());
    args.add("--target-dir");
    args.add(getWarehouseDir());
    args.add("--num-mappers");
    args.add("2");
    args.add("--split-by");
    args.add(splitByColumn);
    args.add("--table");
    args.add(tableName);
    args.add("--connection-param-file");
    args.add(connPropsFileName);

    return args.toArray(new String[0]);
  }

  @Test
  public void testTimestampSplitter() throws IOException {
    tableNames = new ArrayList<String>();
    String [] types = { "INT", "VARCHAR(10)", "TIMESTAMP", };
    String [] vals = {
      "1", "'old_data'", "TO_TIMESTAMP('1999-01-01 11:11:11', 'YYYY-MM-DD HH24:MI:SS')",
      "2", "'new_data'", "TO_TIMESTAMP('2000-11-11 23:23:23', 'YYYY-MM-DD HH24:MI:SS')",
    };
    String tableName = getTableName();
    tableNames.add(tableName);
    createTableWithColTypes(types, vals);
    // Some version of Oracle's jdbc drivers automatically convert date to
    // timestamp. Since we don't want this to happen for this test,
    // we must explicitly use a property file to control this behavior.
    String connPropsFileName = "connection.properties";
    FileUtils.writeStringToFile(new File(connPropsFileName), "oracle.jdbc.mapDateToTimestamp=false");
    String[] args = getArgv(tableName, connPropsFileName, getColName(2));
    runImport(args);

    File file;
    List<String> lines;

    // First row should be in the first file
    file = new File(this.getWarehouseDir(), "part-m-00000");
    lines = FileUtils.readLines(file, "UTF-8");
    assertEquals(1, lines.size());
    assertEquals("1,old_data,1999-01-01 11:11:11.0", lines.get(0));

    // With second line in the second file
    file = new File(this.getWarehouseDir(), "part-m-00001");
    lines = FileUtils.readLines(file, "UTF-8");
    assertEquals(1, lines.size());
    assertEquals("2,new_data,2000-11-11 23:23:23.0", lines.get(0));
  }
}