/**
 * 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 com.cloudera.sqoop.orm;

import java.io.IOException;
import java.util.ArrayList;

import com.cloudera.sqoop.testutil.*;
import org.apache.commons.cli.ParseException;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.NullWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapred.FileInputFormat;
import org.apache.hadoop.mapred.FileOutputFormat;
import org.apache.hadoop.mapred.JobClient;
import org.apache.hadoop.mapred.JobConf;
import org.apache.sqoop.tool.BaseSqoopTool;

import com.cloudera.sqoop.SqoopOptions;
import com.cloudera.sqoop.SqoopOptions.InvalidOptionsException;
import com.cloudera.sqoop.config.ConfigurationHelper;

import com.cloudera.sqoop.testutil.ExplicitSetMapper;
import com.cloudera.sqoop.tool.ImportTool;
import com.cloudera.sqoop.util.ClassLoaderStack;
import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;

/**
 * Test that the parse() methods generated in user SqoopRecord implementations
 * work.
 */
public class TestParseMethods extends ImportJobTestCase {

  /**
   * Create the argv to pass to Sqoop.
   * @return the argv as an array of strings.
   */
  private String [] getArgv(boolean includeHadoopFlags, String fieldTerminator,
      String lineTerminator, String encloser, String escape,
      boolean encloserRequired) {

    ArrayList<String> args = new ArrayList<String>();

    if (includeHadoopFlags) {
      CommonArgs.addHadoopFlags(args);
    }

    args.add("--table");
    args.add(getTableName());
    args.add("--warehouse-dir");
    args.add(getWarehouseDir());
    args.add("--connect");
    args.add(HsqldbTestServer.getUrl());
    args.add("--as-textfile");
    args.add("--split-by");
    args.add("DATA_COL0"); // always split by first column.
    args.add("--fields-terminated-by");
    args.add(fieldTerminator);
    args.add("--lines-terminated-by");
    args.add(lineTerminator);
    args.add("--escaped-by");
    args.add(escape);
    if (encloserRequired) {
      args.add("--enclosed-by");
    } else {
      args.add("--optionally-enclosed-by");
    }
    args.add(encloser);
    args.add("--num-mappers");
    args.add("1");

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

  @Test
  public void testTemporaryRootDirParse() throws Exception {
    String customRoot = "customroot";
    String[] args = new String[] {"--"+BaseSqoopTool.TEMP_ROOTDIR_ARG, customRoot};

    SqoopOptions opts = new ImportTool().parseArguments(args, null, null, true);

    assertEquals(customRoot, opts.getTempRootDir());
  }

  public void runParseTest(String fieldTerminator, String lineTerminator,
      String encloser, String escape, boolean encloseRequired)
      throws IOException {

    ClassLoader prevClassLoader = null;

    String [] argv = getArgv(true, fieldTerminator, lineTerminator,
        encloser, escape, encloseRequired);
    runImport(argv);
    try {
      String tableClassName = getTableName();

      argv = getArgv(false, fieldTerminator, lineTerminator, encloser, escape,
          encloseRequired);
      SqoopOptions opts = new ImportTool().parseArguments(argv, null, null,
          true);

      CompilationManager compileMgr = new CompilationManager(opts);
      String jarFileName = compileMgr.getJarFilename();

      // Make sure the user's class is loaded into our address space.
      prevClassLoader = ClassLoaderStack.addJarFile(jarFileName,
          tableClassName);

      JobConf job = new JobConf();
      job.setJar(jarFileName);

      // Tell the job what class we're testing.
      job.set(ReparseMapper.USER_TYPE_NAME_KEY, tableClassName);

      // use local mode in the same JVM.
      ConfigurationHelper.setJobtrackerAddr(job, "local");
      if (!BaseSqoopTestCase.isOnPhysicalCluster()) {
        job.set(CommonArgs.FS_DEFAULT_NAME, CommonArgs.LOCAL_FS);
      }
      String warehouseDir = getWarehouseDir();
      Path warehousePath = new Path(warehouseDir);
      Path inputPath = new Path(warehousePath, getTableName());
      Path outputPath = new Path(warehousePath, getTableName() + "-out");

      job.setMapperClass(ReparseMapper.class);
      job.setNumReduceTasks(0);
      FileInputFormat.addInputPath(job, inputPath);
      FileOutputFormat.setOutputPath(job, outputPath);

      job.setOutputKeyClass(Text.class);
      job.setOutputValueClass(NullWritable.class);

      JobClient.runJob(job);
    } catch (InvalidOptionsException ioe) {
      fail(ioe.toString());
    } catch (ParseException pe) {
      fail(pe.toString());
    } finally {
      if (null != prevClassLoader) {
        ClassLoaderStack.setCurrentClassLoader(prevClassLoader);
      }
    }
  }

  @Test
  public void testDefaults() throws IOException {
    String [] types = { "INTEGER", "VARCHAR(32)", "INTEGER" };
    String [] vals = { "64", "'foo'", "128" };

    createTableWithColTypes(types, vals);
    runParseTest(",", "\\n", "\\\"", "\\", false);
  }

  @Test
  public void testRequiredEnclose() throws IOException {
    String [] types = { "INTEGER", "VARCHAR(32)", "INTEGER" };
    String [] vals = { "64", "'foo'", "128" };

    createTableWithColTypes(types, vals);
    runParseTest(",", "\\n", "\\\"", "\\", true);
  }

  @Test
  public void testStringEscapes() throws IOException {
    String [] types = {
      "VARCHAR(32)",
      "VARCHAR(32)",
      "VARCHAR(32)",
      "VARCHAR(32)",
      "VARCHAR(32)",
    };
    String [] vals = {
      "'foo'",
      "'foo,bar'",
      "'foo''bar'",
      "'foo\\bar'",
      "'foo,bar''baz'",
    };

    createTableWithColTypes(types, vals);
    runParseTest(",", "\\n", "\\\'", "\\", false);
  }

  @Test
  public void testNumericTypes() throws IOException {
    String [] types = {
      "INTEGER",
      "REAL",
      "FLOAT",
      "DATE",
      "TIME",
      "TIMESTAMP",
      "NUMERIC",
      "BOOLEAN",
    };
    String [] vals = {
      "42",
      "36.0",
      "127.1",
      "'2009-07-02'",
      "'11:24:00'",
      "'2009-08-13 20:32:00.1234567'",
      "92104916282869291837672829102857271948687.287475322",
      "true",
    };

    createTableWithColTypes(types, vals);
    runParseTest(",", "\\n", "\\\'", "\\", false);
  }

  @Test
  public void testFieldSetter() throws IOException {
    ClassLoader prevClassLoader = null;

    String [] types = { "VARCHAR(32)", "VARCHAR(32)" };
    String [] vals = { "'meep'", "'foo'" };
    createTableWithColTypes(types, vals);

    String [] argv = getArgv(true, ",", "\\n", "\\\'", "\\", false);
    runImport(argv);
    try {
      String tableClassName = getTableName();

      argv = getArgv(false, ",", "\\n", "\\\'", "\\", false);
      SqoopOptions opts = new ImportTool().parseArguments(argv, null, null,
          true);

      CompilationManager compileMgr = new CompilationManager(opts);
      String jarFileName = compileMgr.getJarFilename();

      // Make sure the user's class is loaded into our address space.
      prevClassLoader = ClassLoaderStack.addJarFile(jarFileName,
          tableClassName);

      JobConf job = new JobConf();
      job.setJar(jarFileName);

      // Tell the job what class we're testing.
      job.set(ExplicitSetMapper.USER_TYPE_NAME_KEY, tableClassName);
      job.set(ExplicitSetMapper.SET_COL_KEY, BASE_COL_NAME + "0");
      job.set(ExplicitSetMapper.SET_VAL_KEY, "this-is-a-test");

      // use local mode in the same JVM.
      ConfigurationHelper.setJobtrackerAddr(job, "local");
      if (!BaseSqoopTestCase.isOnPhysicalCluster()) {
        job.set(CommonArgs.FS_DEFAULT_NAME, CommonArgs.LOCAL_FS);
      }
      String warehouseDir = getWarehouseDir();
      Path warehousePath = new Path(warehouseDir);
      Path inputPath = new Path(warehousePath, getTableName());
      Path outputPath = new Path(warehousePath, getTableName() + "-out");

      job.setMapperClass(ExplicitSetMapper.class);
      job.setNumReduceTasks(0);
      FileInputFormat.addInputPath(job, inputPath);
      FileOutputFormat.setOutputPath(job, outputPath);

      job.setOutputKeyClass(Text.class);
      job.setOutputValueClass(NullWritable.class);

      JobClient.runJob(job);
    } catch (InvalidOptionsException ioe) {
      fail(ioe.toString());
    } catch (ParseException pe) {
      fail(pe.toString());
    } finally {
      if (null != prevClassLoader) {
        ClassLoaderStack.setCurrentClassLoader(prevClassLoader);
      }
    }
  }
}