/**
 * 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.tool;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import org.apache.commons.cli.ParseException;
import org.apache.sqoop.cli.RelatedOptions;
import org.apache.sqoop.mapreduce.mainframe.MainframeConfiguration;
import org.junit.After;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;

import org.apache.sqoop.SqoopOptions;
import org.apache.sqoop.SqoopOptions.InvalidOptionsException;
import org.apache.sqoop.cli.ToolOptions;
import org.apache.sqoop.testutil.BaseSqoopTestCase;
import org.junit.rules.ExpectedException;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

public class TestMainframeImportTool extends BaseSqoopTestCase {

  private MainframeImportTool mfImportTool;
  private ToolOptions toolOptions;
  private SqoopOptions sqoopOption;

  @Before
  public void setUp() {

    mfImportTool = new MainframeImportTool();
    toolOptions = new ToolOptions();
    sqoopOption = new SqoopOptions();
  }

  @SuppressWarnings("deprecation")
  @Test
  public void testGetImportOptions() throws SecurityException,
      NoSuchMethodException, IllegalArgumentException, IllegalAccessException,
      InvocationTargetException {
    // To access protected method by means of reflection
    Class[] types = {};
    Object[] params = {};
    Method m_getImportOptions = MainframeImportTool.class.getDeclaredMethod(
        "getImportOptions", types);
    m_getImportOptions.setAccessible(true);
    RelatedOptions rOptions = (RelatedOptions) m_getImportOptions.invoke(
        mfImportTool, params);
    assertNotNull("It should return a RelatedOptions", rOptions);
    assertTrue(rOptions.hasOption(MainframeImportTool.DS_ARG));
    assertTrue(rOptions.hasOption(MainframeImportTool.DELETE_ARG));
    assertTrue(rOptions.hasOption(MainframeImportTool.TARGET_DIR_ARG));
    assertTrue(rOptions.hasOption(MainframeImportTool.WAREHOUSE_DIR_ARG));
    assertTrue(rOptions.hasOption(MainframeImportTool.FMT_TEXTFILE_ARG));
    assertTrue(rOptions.hasOption(MainframeImportTool.NUM_MAPPERS_ARG));
    assertTrue(rOptions.hasOption(MainframeImportTool.MAPREDUCE_JOB_NAME));
    assertTrue(rOptions.hasOption(MainframeImportTool.COMPRESS_ARG));
    assertTrue(rOptions.hasOption(MainframeImportTool.COMPRESSION_CODEC_ARG));
    assertTrue(rOptions.hasOption(MainframeImportTool.DS_TYPE_ARG));
  }

  @Test
  public void testApplyOptions()
      throws InvalidOptionsException, ParseException {
    String[] args = { "--" + MainframeImportTool.DS_ARG, "dummy_ds" };
    ToolOptions toolOptions = new ToolOptions();
    SqoopOptions sqoopOption = new SqoopOptions();
    mfImportTool.configureOptions(toolOptions);
    sqoopOption = mfImportTool.parseArguments(args, null, sqoopOption, false);
    assertEquals(sqoopOption.getConnManagerClassName(),
        "org.apache.sqoop.manager.MainframeManager");
    assertEquals(sqoopOption.getTableName(), "dummy_ds");
  }

  @Test
  public void testNotApplyOptions() throws ParseException,
      InvalidOptionsException {
    String[] args = new String[] { "--connection-manager=dummy_ClassName" };
    ToolOptions toolOptions = new ToolOptions();
    SqoopOptions sqoopOption = new SqoopOptions();
    mfImportTool.configureOptions(toolOptions);
    sqoopOption = mfImportTool.parseArguments(args, null, sqoopOption, false);
    assertEquals(sqoopOption.getConnManagerClassName(), "dummy_ClassName");
    assertNull(sqoopOption.getTableName());
  }
  
  @Test
  public void testDataSetTypeOptionIsSet() throws ParseException, InvalidOptionsException {
	  String[] args = new String[] { "--datasettype", MainframeConfiguration.MAINFRAME_INPUT_DATASET_TYPE_GDG };
	  ToolOptions toolOptions = new ToolOptions();
	  SqoopOptions sqoopOption = new SqoopOptions();
	  mfImportTool.configureOptions(toolOptions);
	  sqoopOption = mfImportTool.parseArguments(args, null, sqoopOption, false);
	  assertEquals(sqoopOption.getMainframeInputDatasetType(), MainframeConfiguration.MAINFRAME_INPUT_DATASET_TYPE_GDG);
  }
  
  @Test
  public void testDefaultDataSetTypeOptionIsSet() throws ParseException, InvalidOptionsException {
	  String[] args = new String[] {};
	  ToolOptions toolOptions = new ToolOptions();
	  SqoopOptions sqoopOption = new SqoopOptions();
	  mfImportTool.configureOptions(toolOptions);
	  sqoopOption = mfImportTool.parseArguments(args, null, sqoopOption, false);
	  assertEquals(sqoopOption.getMainframeInputDatasetType(), MainframeConfiguration.MAINFRAME_INPUT_DATASET_TYPE_PARTITIONED);
  }
  
  @Test
  public void testInvalidDataSetTypeOptionThrowsException() {
	  // validateImportOptions gets called from Sqoop.run() function
	  String[] args = new String[] { "--dataset", "mydataset","--datasettype", "fjfdksjjf" };
	  ToolOptions toolOptions = new ToolOptions();
	  SqoopOptions sqoopOption = new SqoopOptions();
	  mfImportTool.configureOptions(toolOptions);
	  try {
		  sqoopOption = mfImportTool.parseArguments(args, null, sqoopOption, false);
		  mfImportTool.validateImportOptions(sqoopOption);
		  String dsType = sqoopOption.getMainframeInputDatasetType();
		  System.out.println("dsType: "+dsType);
	  } catch (InvalidOptionsException e) {
		  String errorMessage = "--datasettype specified is invalid.";
		  e.printStackTrace();
		  assert(e.getMessage().contains(errorMessage));
	  } catch (ParseException e) {
		e.printStackTrace();
		assertFalse(e != null);
	}
  }

  @Test
  public void testTapeOptionIsSet() throws ParseException, InvalidOptionsException {
	  String[] args = new String[] { "--tape", "true" };
	  ToolOptions toolOptions = new ToolOptions();
	  SqoopOptions sqoopOption = new SqoopOptions();
	  mfImportTool.configureOptions(toolOptions);
	  sqoopOption = mfImportTool.parseArguments(args, null, sqoopOption, false);
	  Boolean isTape = sqoopOption.getMainframeInputDatasetTape();
	  assert(isTape != null && isTape.toString().equals("true"));
  }
  @Test
  public void testTapeOptionDefaultIsSet() throws ParseException, InvalidOptionsException {
	  String[] args = new String[] { "--datasettype", MainframeConfiguration.MAINFRAME_INPUT_DATASET_TYPE_GDG };
	  ToolOptions toolOptions = new ToolOptions();
	  SqoopOptions sqoopOption = new SqoopOptions();
	  mfImportTool.configureOptions(toolOptions);
	  sqoopOption = mfImportTool.parseArguments(args, null, sqoopOption, false);
	  Boolean isTape = sqoopOption.getMainframeInputDatasetTape();
	  assert(isTape != null && isTape.toString().equals("false"));
  }
  @Test
  public void testTapeOptionInvalidReturnsFalse() throws ParseException, InvalidOptionsException {
	  String[] args = new String[] { "--dataset", "mydatasetname", "--tape", "invalidvalue" };
	  ToolOptions toolOptions = new ToolOptions();
	  SqoopOptions sqoopOption = new SqoopOptions();
	  mfImportTool.configureOptions(toolOptions);
	  sqoopOption = mfImportTool.parseArguments(args, null, sqoopOption, false);
	  mfImportTool.validateImportOptions(sqoopOption);
	  Boolean isTape = sqoopOption.getMainframeInputDatasetTape();
	  assert(isTape != null && isTape.toString().equals("false"));
  }

  @Test
  public void testFtpTransferModeAscii() throws ParseException, InvalidOptionsException {
    String[] args = new String[] { "--dataset", "mydatasetname", "--as-textfile" };
    configureAndValidateOptions(args);
    assertEquals(SqoopOptions.FileLayout.TextFile,sqoopOption.getFileLayout());
  }
  @Test
  public void testFtpTransferModeDefaultsToAscii() throws ParseException, InvalidOptionsException {
    String[] args = new String[] { "--dataset", "mydatasetname" };
    configureAndValidateOptions(args);
    assertEquals(SqoopOptions.FileLayout.TextFile,sqoopOption.getFileLayout());
  }

  @Test
  public void testAsBinaryFileSetsCorrectFileLayoutAndDefaultBufferSize() throws ParseException, InvalidOptionsException {
    String[] args = new String[] { "--dataset", "mydatasetname", "--as-binaryfile" };
    configureAndValidateOptions(args);
    assertEquals(SqoopOptions.FileLayout.BinaryFile,sqoopOption.getFileLayout());
    assertEquals(MainframeConfiguration.MAINFRAME_FTP_TRANSFER_BINARY_DEFAULT_BUFFER_SIZE, sqoopOption.getBufferSize());
  }

  @Test
  public void testSetBufferSize() throws ParseException, InvalidOptionsException {
    final Integer EXPECTED_BUFFER = 1024;
    String[] args = new String[] { "--dataset", "mydatasetname", "--as-binaryfile", "--buffersize", EXPECTED_BUFFER.toString() };
    configureAndValidateOptions(args);
    assertEquals(SqoopOptions.FileLayout.BinaryFile,sqoopOption.getFileLayout());
    assertEquals(EXPECTED_BUFFER, sqoopOption.getBufferSize());
  }

  @Rule
  public final ExpectedException exception = ExpectedException.none();

  @Test
  public void testBufferSizeWithoutBinaryThrowsException() throws ParseException, InvalidOptionsException {
    final Integer EXPECTED_BUFFER = 1024;
    String[] args = new String[] { "--buffersize", EXPECTED_BUFFER.toString() };
    exception.expect(InvalidOptionsException.class);
    configureAndValidateOptions(args);
  }

  @Test
  public void testInvalidBufferSizeThrowsNumberFormatException() throws ParseException, InvalidOptionsException {
    String[] args = new String[] { "--buffersize", "invalidinteger" };
    exception.expect(NumberFormatException.class);
    configureAndValidateOptions(args);
  }

  @Test
  public void testFtpTransferCommands() throws ParseException, InvalidOptionsException {
    String expectedCmds = "quote SITE RDW,quote SITE RDW READTAPEFORMAT=V";
    String[] args = new String[] { "--dataset", "mydatasetname", "--ftp-commands", expectedCmds};
    ToolOptions toolOptions = new ToolOptions();
    SqoopOptions sqoopOption = new SqoopOptions();
    mfImportTool.configureOptions(toolOptions);
    sqoopOption = mfImportTool.parseArguments(args, null, sqoopOption, false);
    mfImportTool.validateImportOptions(sqoopOption);
    String ftpcmds = sqoopOption.getFtpCommands();
    assertEquals(ftpcmds,expectedCmds);
  }

  private void configureAndValidateOptions(String[] args) throws ParseException, InvalidOptionsException {
    mfImportTool.configureOptions(toolOptions);
    sqoopOption = mfImportTool.parseArguments(args, null, sqoopOption, false);
    mfImportTool.validateImportOptions(sqoopOption);
  }
}