/*
 * 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.arrow.adapter.jdbc.h2;

import static org.apache.arrow.adapter.jdbc.JdbcToArrowTestHelper.assertBigIntVectorValues;
import static org.apache.arrow.adapter.jdbc.JdbcToArrowTestHelper.assertBitVectorValues;
import static org.apache.arrow.adapter.jdbc.JdbcToArrowTestHelper.assertBooleanVectorValues;
import static org.apache.arrow.adapter.jdbc.JdbcToArrowTestHelper.assertDateVectorValues;
import static org.apache.arrow.adapter.jdbc.JdbcToArrowTestHelper.assertDecimalVectorValues;
import static org.apache.arrow.adapter.jdbc.JdbcToArrowTestHelper.assertFloat4VectorValues;
import static org.apache.arrow.adapter.jdbc.JdbcToArrowTestHelper.assertFloat8VectorValues;
import static org.apache.arrow.adapter.jdbc.JdbcToArrowTestHelper.assertIntVectorValues;
import static org.apache.arrow.adapter.jdbc.JdbcToArrowTestHelper.assertNullVectorValues;
import static org.apache.arrow.adapter.jdbc.JdbcToArrowTestHelper.assertSmallIntVectorValues;
import static org.apache.arrow.adapter.jdbc.JdbcToArrowTestHelper.assertTimeStampVectorValues;
import static org.apache.arrow.adapter.jdbc.JdbcToArrowTestHelper.assertTimeVectorValues;
import static org.apache.arrow.adapter.jdbc.JdbcToArrowTestHelper.assertTinyIntVectorValues;
import static org.apache.arrow.adapter.jdbc.JdbcToArrowTestHelper.assertVarBinaryVectorValues;
import static org.apache.arrow.adapter.jdbc.JdbcToArrowTestHelper.assertVarcharVectorValues;

import java.io.IOException;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Collection;

import org.apache.arrow.adapter.jdbc.AbstractJdbcToArrowTest;
import org.apache.arrow.adapter.jdbc.JdbcToArrow;
import org.apache.arrow.adapter.jdbc.JdbcToArrowConfig;
import org.apache.arrow.adapter.jdbc.JdbcToArrowConfigBuilder;
import org.apache.arrow.adapter.jdbc.JdbcToArrowTestHelper;
import org.apache.arrow.adapter.jdbc.JdbcToArrowUtils;
import org.apache.arrow.adapter.jdbc.Table;
import org.apache.arrow.memory.RootAllocator;
import org.apache.arrow.vector.BigIntVector;
import org.apache.arrow.vector.BitVector;
import org.apache.arrow.vector.DateDayVector;
import org.apache.arrow.vector.DecimalVector;
import org.apache.arrow.vector.Float4Vector;
import org.apache.arrow.vector.Float8Vector;
import org.apache.arrow.vector.IntVector;
import org.apache.arrow.vector.NullVector;
import org.apache.arrow.vector.SmallIntVector;
import org.apache.arrow.vector.TimeMilliVector;
import org.apache.arrow.vector.TimeStampVector;
import org.apache.arrow.vector.TinyIntVector;
import org.apache.arrow.vector.VarBinaryVector;
import org.apache.arrow.vector.VarCharVector;
import org.apache.arrow.vector.VectorSchemaRoot;
import org.apache.arrow.vector.types.pojo.Schema;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

/**
 * JUnit Test Class which contains methods to test JDBC to Arrow data conversion functionality with various data types
 * for H2 database using multiple test data files.
 */
@RunWith(Parameterized.class)
public class JdbcToArrowDataTypesTest extends AbstractJdbcToArrowTest {

  private static final String BIGINT = "big_int";
  private static final String BINARY = "binary";
  private static final String BIT = "bit";
  private static final String BLOB = "blob";
  private static final String BOOL = "bool";
  private static final String CHAR = "char";
  private static final String CLOB = "clob";
  private static final String DATE = "date";
  private static final String DECIMAL = "decimal";
  private static final String DOUBLE = "double";
  private static final String INT = "int";
  private static final String REAL = "real";
  private static final String SMALLINT = "small_int";
  private static final String TIME = "time";
  private static final String TIMESTAMP = "timestamp";
  private static final String TINYINT = "tiny_int";
  private static final String VARCHAR = "varchar";
  private static final String NULL = "null";

  private static final String[] testFiles = {
    "h2/test1_bigint_h2.yml",
    "h2/test1_binary_h2.yml",
    "h2/test1_bit_h2.yml",
    "h2/test1_blob_h2.yml",
    "h2/test1_bool_h2.yml",
    "h2/test1_char_h2.yml",
    "h2/test1_clob_h2.yml",
    "h2/test1_date_h2.yml",
    "h2/test1_decimal_h2.yml",
    "h2/test1_double_h2.yml",
    "h2/test1_int_h2.yml",
    "h2/test1_real_h2.yml",
    "h2/test1_smallint_h2.yml",
    "h2/test1_time_h2.yml",
    "h2/test1_timestamp_h2.yml",
    "h2/test1_tinyint_h2.yml",
    "h2/test1_varchar_h2.yml",
    "h2/test1_null_h2.yml"
  };

  /**
   * Constructor which populate table object for each test iteration.
   *
   * @param table Table object
   */
  public JdbcToArrowDataTypesTest(Table table) {
    this.table = table;
  }

  /**
   * Get the test data as a collection of Table objects for each test iteration.
   *
   * @return Collection of Table objects
   * @throws SQLException on error
   * @throws ClassNotFoundException on error
   * @throws IOException on error
   */
  @Parameters
  public static Collection<Object[]> getTestData() throws SQLException, ClassNotFoundException, IOException {
    return Arrays.asList(prepareTestData(testFiles, JdbcToArrowDataTypesTest.class));
  }

  /**
   * Test Method to test JdbcToArrow Functionality for various H2 DB based datatypes.
   */
  @Test
  public void testJdbcToArrowValues() throws SQLException, IOException {
    testDataSets(JdbcToArrow.sqlToArrow(conn, table.getQuery(), new RootAllocator(Integer.MAX_VALUE),
        Calendar.getInstance()));
    testDataSets(JdbcToArrow.sqlToArrow(conn, table.getQuery(), new RootAllocator(Integer.MAX_VALUE)));
    testDataSets(JdbcToArrow.sqlToArrow(conn.createStatement().executeQuery(table.getQuery()),
        new RootAllocator(Integer.MAX_VALUE), Calendar.getInstance()));
    testDataSets(JdbcToArrow.sqlToArrow(conn.createStatement().executeQuery(table.getQuery())));
    testDataSets(JdbcToArrow.sqlToArrow(conn.createStatement().executeQuery(table.getQuery()),
        new RootAllocator(Integer.MAX_VALUE)));
    testDataSets(JdbcToArrow.sqlToArrow(conn.createStatement().executeQuery(table.getQuery()), Calendar.getInstance()));
    testDataSets(JdbcToArrow.sqlToArrow(
        conn.createStatement().executeQuery(table.getQuery()),
        new JdbcToArrowConfigBuilder(new RootAllocator(Integer.MAX_VALUE), Calendar.getInstance()).build()));
    testDataSets(JdbcToArrow.sqlToArrow(
        conn,
        table.getQuery(),
        new JdbcToArrowConfigBuilder(new RootAllocator(Integer.MAX_VALUE), Calendar.getInstance()).build()));
  }

  @Test
  public void testJdbcSchemaMetadata() throws SQLException {
    JdbcToArrowConfig config = new JdbcToArrowConfigBuilder(new RootAllocator(0), Calendar.getInstance(), true).build();
    ResultSetMetaData rsmd = conn.createStatement().executeQuery(table.getQuery()).getMetaData();
    Schema schema = JdbcToArrowUtils.jdbcToArrowSchema(rsmd, config);
    JdbcToArrowTestHelper.assertFieldMetadataMatchesResultSetMetadata(rsmd, schema);
  }

  /**
   * This method calls the assert methods for various DataSets.
   *
   * @param root VectorSchemaRoot for test
   */
  public void testDataSets(VectorSchemaRoot root) {
    JdbcToArrowTestHelper.assertFieldMetadataIsEmpty(root);

    switch (table.getType()) {
      case BIGINT:
        assertBigIntVectorValues((BigIntVector) root.getVector(table.getVector()), table.getValues().length,
            table.getLongValues());
        break;
      case BINARY:
      case BLOB:
        assertVarBinaryVectorValues((VarBinaryVector) root.getVector(table.getVector()), table.getValues().length,
            table.getBinaryValues());
        break;
      case BIT:
        assertBitVectorValues((BitVector) root.getVector(table.getVector()), table.getValues().length,
            table.getIntValues());
        break;
      case BOOL:
        assertBooleanVectorValues((BitVector) root.getVector(table.getVector()), table.getValues().length,
            table.getBoolValues());
        break;
      case CHAR:
      case VARCHAR:
      case CLOB:
        assertVarcharVectorValues((VarCharVector) root.getVector(table.getVector()), table.getValues().length,
            table.getCharValues());
        break;
      case DATE:
        assertDateVectorValues((DateDayVector) root.getVector(table.getVector()), table.getValues().length,
            table.getIntValues());
        break;
      case TIME:
        assertTimeVectorValues((TimeMilliVector) root.getVector(table.getVector()), table.getValues().length,
            table.getLongValues());
        break;
      case TIMESTAMP:
        assertTimeStampVectorValues((TimeStampVector) root.getVector(table.getVector()), table.getValues().length,
            table.getLongValues());
        break;
      case DECIMAL:
        assertDecimalVectorValues((DecimalVector) root.getVector(table.getVector()), table.getValues().length,
            table.getBigDecimalValues());
        break;
      case DOUBLE:
        assertFloat8VectorValues((Float8Vector) root.getVector(table.getVector()), table.getValues().length,
            table.getDoubleValues());
        break;
      case INT:
        assertIntVectorValues((IntVector) root.getVector(table.getVector()), table.getValues().length,
            table.getIntValues());
        break;
      case SMALLINT:
        assertSmallIntVectorValues((SmallIntVector) root.getVector(table.getVector()), table.getValues().length,
            table.getIntValues());
        break;
      case TINYINT:
        assertTinyIntVectorValues((TinyIntVector) root.getVector(table.getVector()), table.getValues().length,
            table.getIntValues());
        break;
      case REAL:
        assertFloat4VectorValues((Float4Vector) root.getVector(table.getVector()), table.getValues().length,
            table.getFloatValues());
        break;
      case NULL:
        assertNullVectorValues((NullVector) root.getVector(table.getVector()), table.getRowCount());
        break;
      default:
        // do nothing
        break;
    }
  }
}

