/* Copyright (C) 2014 InfiniDB, Inc.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; version 2 of
   the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   MA 02110-1301, USA. */

/****************************************************************************
 * $Id: func_to_days.cpp 3923 2013-06-19 21:43:06Z bwilkinson $
 *
 *
 ****************************************************************************/

#include <cstdlib>
#include <string>
#include <sstream>
using namespace std;

#include "functor_int.h"
#include "funchelpers.h"
#include "functioncolumn.h"
#include "rowgroup.h"
using namespace execplan;

#include "dataconvert.h"

#include "errorcodes.h"
#include "idberrorinfo.h"
#include "errorids.h"
using namespace logging;

namespace funcexp
{
CalpontSystemCatalog::ColType Func_to_days::operationType(FunctionParm& fp,
                                                          CalpontSystemCatalog::ColType& resultType)
{
  return resultType;
}

int64_t Func_to_days::getIntVal(rowgroup::Row& row, FunctionParm& parm, bool& isNull,
                                CalpontSystemCatalog::ColType& op_ct)
{
  CalpontSystemCatalog::ColDataType type = parm[0]->data()->resultType().colDataType;

  uint32_t year = 0, month = 0, day = 0;

  dataconvert::DateTime aDateTime;
  dataconvert::Time aTime;

  switch (type)
  {
    case execplan::CalpontSystemCatalog::DATE:
    {
      int32_t val = parm[0]->data()->getDateIntVal(row, isNull);
      year = (uint32_t)((val >> 16) & 0xffff);
      month = (uint32_t)((val >> 12) & 0xf);
      day = (uint32_t)((val >> 6) & 0x3f);
      return helpers::calc_mysql_daynr(year, month, day);
      break;
    }

    case execplan::CalpontSystemCatalog::DATETIME:
    {
      int64_t val = parm[0]->data()->getDatetimeIntVal(row, isNull);
      year = (uint32_t)((val >> 48) & 0xffff);
      month = (uint32_t)((val >> 44) & 0xf);
      day = (uint32_t)((val >> 38) & 0x3f);

      return helpers::calc_mysql_daynr(year, month, day);
      break;
    }

    case execplan::CalpontSystemCatalog::TIMESTAMP:
    {
      dataconvert::TimeStamp timestamp(parm[0]->data()->getTimestampIntVal(row, isNull));
      int64_t seconds = timestamp.second;
      dataconvert::MySQLTime m_time;
      dataconvert::gmtSecToMySQLTime(seconds, m_time, op_ct.getTimeZone());
      year = m_time.year;
      month = m_time.month;
      day = m_time.day;
      return helpers::calc_mysql_daynr(year, month, day);
    }
    // Time adds to now() and then gets value
    case CalpontSystemCatalog::TIME:
    {
      int64_t val;
      aDateTime = static_cast<dataconvert::DateTime>(nowDatetime());
      aTime = parm[0]->data()->getTimeIntVal(row, isNull);
      aDateTime.hour = 0;
      aDateTime.minute = 0;
      aDateTime.second = 0;
      aDateTime.msecond = 0;
      aTime.day = 0;
      val = addTime(aDateTime, aTime);
      year = (uint32_t)((val >> 48) & 0xffff);
      month = (uint32_t)((val >> 44) & 0xf);
      day = (uint32_t)((val >> 38) & 0x3f);
      return helpers::calc_mysql_daynr(year, month, day);
      break;
    }

    case execplan::CalpontSystemCatalog::VARCHAR:  // including CHAR'
    case execplan::CalpontSystemCatalog::CHAR:
    case execplan::CalpontSystemCatalog::TEXT:
    {
      const auto& value = parm[0]->data()->getStrVal(row, isNull);
      int64_t val = 0;

      if (value.length() == 10)
      {
        // date type
        val = dataconvert::DataConvert::dateToInt(value);
        year = (uint32_t)((val >> 16) & 0xffff);
        month = (uint32_t)((val >> 12) & 0xf);
        day = (uint32_t)((val >> 6) & 0x3f);
      }
      else
      {
        // datetime type
        val = dataconvert::DataConvert::datetimeToInt(value);
        year = (uint32_t)((val >> 48) & 0xffff);
        month = (uint32_t)((val >> 44) & 0xf);
        day = (uint32_t)((val >> 38) & 0x3f);
      }

      return helpers::calc_mysql_daynr(year, month, day);
      break;
    }

    default:
    {
      std::ostringstream oss;
      oss << "to_days: datatype of " << execplan::colDataTypeToString(type);
      ;
      throw logging::IDBExcept(oss.str(), ERR_DATATYPE_NOT_SUPPORT);
    }
  }

  return 0;
}

}  // namespace funcexp
