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/*
 * Copyright (c) 2012-2019 Snowflake Computing Inc. All rights reserved.
 */
package net.snowflake.client.core.arrow;

import net.snowflake.client.core.DataConversionContext;
import net.snowflake.client.core.IncidentUtil;
import net.snowflake.client.core.ResultUtil;
import net.snowflake.client.core.SFException;
import net.snowflake.client.jdbc.ErrorCode;
import net.snowflake.client.jdbc.SnowflakeType;
import net.snowflake.client.jdbc.SnowflakeUtil;
import net.snowflake.common.core.SFTime;
import org.apache.arrow.vector.BigIntVector;
import org.apache.arrow.vector.ValueVector;

import java.nio.ByteBuffer;
import java.sql.Time;
import java.sql.Timestamp;
import java.util.TimeZone;

public class BigIntToTimeConverter extends AbstractArrowVectorConverter
{
  private BigIntVector bigIntVector;
  protected ByteBuffer byteBuf = ByteBuffer.allocate(BigIntVector.TYPE_WIDTH);

  public BigIntToTimeConverter(ValueVector fieldVector, int columnIndex, DataConversionContext context)
  {
    super(SnowflakeType.TIME.name(), fieldVector, columnIndex, context);
    this.bigIntVector = (BigIntVector) fieldVector;
  }

  /**
   * parse long into SFTime
   *
   * @param index
   * @return
   */
  private SFTime toSFTime(int index)
  {
    long val = bigIntVector.getDataBuffer().getLong(index * BigIntVector.TYPE_WIDTH);
    return SFTime.fromFractionalSeconds(val, context.getScale(columnIndex));
  }

  @Override
  public Time toTime(int index) throws SFException
  {
    if (isNull(index))
    {
      return null;
    }
    else
    {
      SFTime sfTime = toSFTime(index);
      if (sfTime == null)
      {
        return null;
      }
      return new Time(sfTime.getFractionalSeconds(ResultUtil.DEFAULT_SCALE_OF_SFTIME_FRACTION_SECONDS));
    }
  }

  @Override
  public String toString(int index) throws SFException
  {
    if (context.getTimeFormatter() == null)
    {
      throw (SFException) IncidentUtil.generateIncidentV2WithException(
          context.getSession(),
          new SFException(ErrorCode.INTERNAL_ERROR,
                          "missing time formatter"),
          null,
          null);
    }
    return isNull(index) ? null :
           ResultUtil.getSFTimeAsString(toSFTime(index), context.getScale(columnIndex), context.getTimeFormatter());
  }

  @Override
  public Object toObject(int index) throws SFException
  {
    return isNull(index) ? null : toTime(index);
  }

  @Override
  public Timestamp toTimestamp(int index, TimeZone tz) throws SFException
  {
    return isNull(index) ? null : new Timestamp(toTime(index).getTime());
  }

  @Override
  public boolean toBoolean(int index) throws SFException
  {
    if (isNull(index))
    {
      return false;
    }
    Time val = toTime(index);
    throw new SFException(ErrorCode.INVALID_VALUE_CONVERT, logicalTypeStr,
                          SnowflakeUtil.BOOLEAN_STR, val);
  }
}