/**
 * 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 java.io.UnsupportedEncodingException;
import java.sql.SQLException;
import java.util.Formatter;

import org.apache.sqoop.manager.oracle.util.OracleUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.apache.hadoop.conf.Configuration;
import org.apache.sqoop.SqoopOptions;
import org.apache.sqoop.testutil.ManagerCompatTestCase;
import org.junit.Test;

import static org.junit.Assert.fail;

/**
 * Test the basic Oracle connection manager with the various column types.
 */
public class OracleCompatTest extends ManagerCompatTestCase {

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

  @Override
  protected Log getLogger() {
    return LOG;
  }

  @Override
  protected String getDbFriendlyName() {
    return "Oracle";
  }

  @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());
  }

  @Override
  public void tearDown() {
    super.tearDown();

    // If we actually ran the test, we'll need to 'cool off' afterwards.
    if (!skipped) {
      // Oracle XE will block connections if you create new ones too quickly.
      // See http://forums.oracle.com/forums/thread.jspa?messageID=1145120
      LOG.info("Sleeping to wait for Oracle connection cache clear...");
      try {
        Thread.sleep(250);
      } catch (InterruptedException ie) {
        // This delay may run a bit short.. no problem.
      }
    }
  }

  @Override
  protected String getDoubleType() {
    return "DOUBLE PRECISION";
  }

  @Override
  protected String getVarBinaryType() {
    return "RAW(12)";
  }

  // Oracle does not provide a BOOLEAN type.
  @Override
  protected boolean supportsBoolean() {
    return false;
  }

  // Oracle does not provide a BIGINT type.
  @Override
  protected boolean supportsBigInt() {
    return false;
  }

  // Oracle does not provide a TINYINT type.
  @Override
  protected boolean supportsTinyInt() {
    return false;
  }

  // Oracle does not provide a LONGVARCHAR type.
  @Override
  protected boolean supportsLongVarChar() {
    return false;
  }

  // Oracle does not provide a TIME type. We test DATE and TIMESTAMP
  @Override
  protected boolean supportsTime() {
    return false;
  }

  @Override
  protected String getDateInsertStr(String dateStr) {
    return "TO_DATE(" + dateStr + ", 'YYYY-MM-DD')";
  }

  @Override
  protected String getTimestampInsertStr(String tsStr) {
    return "TO_TIMESTAMP(" + tsStr + ", 'YYYY-MM-DD HH24:MI:SS.FF')";
  }

  @Override
  protected String getDateSeqOutput(String asInserted) {
    // DATE is actually a TIMESTAMP in Oracle; add a time component.
    return asInserted + " 00:00:00.0";
  }

  @Override
  protected String getFixedCharSeqOut(int fieldWidth, String asInserted) {
    return padString(fieldWidth, asInserted);
  }

  @Override
  protected String getRealSeqOutput(String realAsInserted) {
    return realAsInserted;
  }

  @Override
  protected String getFloatSeqOutput(String floatAsInserted) {
    return floatAsInserted;
  }

  @Override
  protected String getDoubleSeqOutput(String doubleAsInserted) {
    return doubleAsInserted;
  }

  @Override
  protected String getVarBinarySeqOutput(String asInserted) {
    return toLowerHexString(asInserted);
  }

  @Override
  protected String getBlobInsertStr(String blobData) {
    // Oracle wants blob data encoded as hex (e.g. '01fca3b5').

    StringBuilder sb = new StringBuilder();
    sb.append("'");

    Formatter fmt = new Formatter(sb);
    try {
      for (byte b : blobData.getBytes("UTF-8")) {
        fmt.format("%02X", b);
      }
    } catch (UnsupportedEncodingException uee) {
      // Should not happen; Java always supports UTF-8.
      fail("Could not get utf-8 bytes for blob string");
      return null;
    }
    sb.append("'");
    return sb.toString();
  }

  protected String getBinaryFloatInsertStr(float f) {
    return "TO_BINARY_FLOAT('" + f + "')";
  }

  protected String getBinaryDoubleInsertStr(double d) {
    return "TO_BINARY_DOUBLE('" + d + "')";
  }

  // Disable this test since Oracle isn't ANSI compliant.
  @Override
  @Test
  public void testEmptyStringCol() {
    this.skipped = true;
    LOG.info(
        "Oracle treats empty strings as null (non-ANSI compliant). Skipping.");
  }

  @Override
  @Test
  public void testTimestamp1() {
    verifyType(getTimestampType(),
        getTimestampInsertStr("'2009-04-24 18:24:00'"),
        "2009-04-24 18:24:00.0");
  }

  @Override
  @Test
  public void testTimestamp2() {
    verifyType(getTimestampType(),
        getTimestampInsertStr("'2009-04-24 18:24:00.0002'"),
        "2009-04-24 18:24:00.0002");
  }

  @Override
  @Test
  public void testDate1() {
    verifyType("DATE", getDateInsertStr("'2009-01-12'"),
        getDateSeqOutput("2009-01-12"));
  }

  @Override
  @Test
  public void testDate2() {
    verifyType("DATE", getDateInsertStr("'2009-04-24'"),
        getDateSeqOutput("2009-04-24"));
  }

  @Test
  public void testRawVal() {
    verifyType("RAW(8)", "'12ABCD'", getVarBinarySeqOutput("12ABCD"), true);
  }

  @Test
  public void testBinaryFloat() {
    verifyType("BINARY_FLOAT", getBinaryFloatInsertStr(25f), "25.0");
    verifyType("BINARY_FLOAT", getBinaryFloatInsertStr(+6.34f), "6.34");

    // Max and min are from Oracle DB SQL reference for 10g release 2
    float max = 3.40282E+38F;
    verifyType("BINARY_FLOAT", getBinaryFloatInsertStr(max), "3.40282E38");
    float min = 1.17549E-38F;
    verifyType("BINARY_FLOAT", getBinaryFloatInsertStr(min), "1.17549E-38");
  }

  @Test
  public void testBinaryDouble() {
    verifyType("BINARY_DOUBLE", getBinaryDoubleInsertStr(0.5d), "0.5");
    verifyType("BINARY_DOUBLE", getBinaryDoubleInsertStr(-1d), "-1.0");

    // Max and min are from Oracle DB SQL reference for 10g release 2
    double max = 1.79769313486231E+308;
    verifyType("BINARY_DOUBLE", getBinaryDoubleInsertStr(max),
        "1.79769313486231E308");
    double min = 2.22507485850720E-308;
    verifyType("BINARY_DOUBLE", getBinaryDoubleInsertStr(min),
        "2.2250748585072E-308");
  }
}