/*
   Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.

   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 St, Fifth Floor, Boston, MA 02110-1301  USA
*/

#include <ndb_global.h>
#include "HugoCalculator.hpp"
#include <NDBT.hpp>

static
Uint32
myRand(Uint64 * seed)
{
  const Uint64 mul= 0x5deece66dull;
  const Uint64 add= 0xb;
  Uint64 loc_result = *seed * mul + add;

  * seed= loc_result;
  return (Uint32)(loc_result >> 1);
}

static char base64_table[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
                             "abcdefghijklmnopqrstuvwxyz"
                             "0123456789+/";

/* *************************************************************
 * HugoCalculator
 *
 *  Comon class for the Hugo test suite, provides the functions 
 *  that is used for calculating values to load in to table and 
 *  also knows how to verify a row that's been read from db 
 *
 * ************************************************************/
HugoCalculator::HugoCalculator(const NdbDictionary::Table& tab) : m_tab(tab) {

  // The "id" column of this table is found in the first integer column
  int i;
  for (i=0; i<m_tab.getNoOfColumns(); i++){ 
    const NdbDictionary::Column* attr = m_tab.getColumn(i);
    if (attr->getType() == NdbDictionary::Column::Unsigned){
      m_idCol = i;
      break;
    }
  }
  
  // The "number of updates" column for this table is found in the last column
  for (i=m_tab.getNoOfColumns()-1; i>=0; i--){
    const NdbDictionary::Column* attr = m_tab.getColumn(i);
    if (attr->getType() == NdbDictionary::Column::Unsigned && 
	!attr->getPrimaryKey()){
      m_updatesCol = i;
      break;
    }
  }
#if 0
  ndbout << "idCol = " << m_idCol << endl;
  ndbout << "updatesCol = " << m_updatesCol << endl;
#endif
  // Check that idCol is not conflicting with updatesCol
  assert(m_idCol != m_updatesCol && m_idCol != -1 && m_updatesCol != -1);
}

Int32
HugoCalculator::calcValue(int record, 
			  int attrib, 
			  int updates) const {
  
  Int32 i;
  Uint32 j;
  calcValue(record, attrib, updates, (char*)&i, sizeof(i), &j);

  return i;
}
#if 0
HugoCalculator::U_Int32 calcValue(int record, int attrib, int updates) const;
HugoCalculator::U_Int64 calcValue(int record, int attrib, int updates) const;
HugoCalculator::Int64 calcValue(int record, int attrib, int updates) const;
HugoCalculator::float calcValue(int record, int attrib, int updates) const;
HugoCalculator::double calcValue(int record, int attrib, int updates) const;
#endif

static
Uint32
calc_len(Uint32 rvalue, int maxlen)
{
  Uint32 minlen = 25;
  
  if ((rvalue >> 16) < 4096)
    minlen = 15;
  else if ((rvalue >> 16) < 8192)
    minlen = 25;
  else if ((rvalue >> 16) < 16384)
    minlen = 35;
  else
    minlen = 64;

  if ((Uint32)maxlen <= minlen)
    return maxlen;

  /* Ensure coverage of maxlen */
  if ((rvalue & 64) == 0)
    return maxlen;

  return minlen + (rvalue % (maxlen - minlen));
}

static
Uint32
calc_blobLen(Uint32 rvalue, int maxlen)
{
  int minlen = 1000;

  if ((rvalue >> 16) < 4096)
    minlen = 5000;
  else if ((rvalue >> 16) < 8192)
    minlen = 8000;
  else if ((rvalue >> 16) < 16384)
    minlen = 12000;
  else
    minlen = 16000;

  if (maxlen <= minlen)
    return maxlen;

  return minlen + (rvalue % (maxlen - minlen));
}

const char* 
HugoCalculator::calcValue(int record, 
			  int attrib, 
			  int updates, 
			  char* buf,
			  int len,
			  Uint32 *outlen) const {
  Uint64 seed;
  const NdbDictionary::Column* attr = m_tab.getColumn(attrib);
  Uint32 val;
  * outlen = len;
  do
  {
    if (attrib == m_idCol)
    {
      val= record;
      memcpy(buf, &val, 4);
      return buf;
    }
    
    // If this is the update column
    if (attrib == m_updatesCol)
    {
      val= updates;
      memcpy(buf, &val, 4);
      return buf;
    }
    
    if (attr->getPrimaryKey())
    {
      seed = record + attrib;
    }
    else
    {
      seed = record + attrib + updates;
    }
  } while (0);
  
  val = myRand(&seed);  
  
  if(attr->getNullable() && (((val >> 16) & 255) > 220))
  {
    * outlen = 0;
    return NULL;
  }

  int pos= 0;
  char* dst= buf;
  switch(attr->getType()){
  case NdbDictionary::Column::Tinyint:
  case NdbDictionary::Column::Tinyunsigned:
  case NdbDictionary::Column::Smallint:
  case NdbDictionary::Column::Smallunsigned:
  case NdbDictionary::Column::Mediumint:
  case NdbDictionary::Column::Mediumunsigned:
  case NdbDictionary::Column::Int:
  case NdbDictionary::Column::Unsigned:
  case NdbDictionary::Column::Bigint:
  case NdbDictionary::Column::Bigunsigned:
  case NdbDictionary::Column::Olddecimal:
  case NdbDictionary::Column::Olddecimalunsigned:
  case NdbDictionary::Column::Decimal:
  case NdbDictionary::Column::Decimalunsigned:
  case NdbDictionary::Column::Binary:
  case NdbDictionary::Column::Datetime:
  case NdbDictionary::Column::Time:
  case NdbDictionary::Column::Date:
  case NdbDictionary::Column::Bit:
    while (len > 4)
    {
      memcpy(buf+pos, &val, 4);
      pos += 4;
      len -= 4;
      val= myRand(&seed);
    }
    
    memcpy(buf+pos, &val, len);
    if(attr->getType() == NdbDictionary::Column::Bit)
    {
      Uint32 bits= attr->getLength();
      Uint32 tmp = bits >> 5;
      Uint32 size = bits & 31;
      Uint32 copy;
      memcpy(&copy, ((Uint32*)buf)+tmp, 4);
      copy &= ((1 << size) - 1);
      memcpy(((Uint32*)buf)+tmp, &copy, 4);
    }
    break;
  case NdbDictionary::Column::Float:
    {
      float x = (float)myRand(&seed);
      memcpy(buf+pos, &x, 4);
      pos += 4;
      len -= 4;
    }
    break;
  case NdbDictionary::Column::Double:
    {
      double x = (double)myRand(&seed);
      memcpy(buf+pos, &x, 8);
      pos += 8;
      len -= 8;
    }
    break;
  case NdbDictionary::Column::Varbinary:
  case NdbDictionary::Column::Varchar:
    len = calc_len(myRand(&seed), len - 1);
    assert(len < 256);
    * outlen = len + 1;
    * buf = len;
    dst++;
    goto write_char;
  case NdbDictionary::Column::Longvarchar:
  case NdbDictionary::Column::Longvarbinary:
    len = calc_len(myRand(&seed), len - 2);
    assert(len < 65536);
    * outlen = len + 2;
    int2store(buf, len);
    dst += 2;
write_char:
  case NdbDictionary::Column::Char:
  {
    char* ptr= (char*)&val;
    while(len >= 4)
    {
      len -= 4;
      dst[pos++] = base64_table[ptr[0] & 0x3f];
      dst[pos++] = base64_table[ptr[1] & 0x3f];
      dst[pos++] = base64_table[ptr[2] & 0x3f];
      dst[pos++] = base64_table[ptr[3] & 0x3f];
      val= myRand(&seed);
    }
    
    for(; len; len--, pos++)
      dst[pos] = base64_table[ptr[len] & 0x3f];

    pos--;
    break;
  }
  case NdbDictionary::Column::Blob:
    * outlen = calc_blobLen(myRand(&seed), len);
    // Don't set any actual data...
    break;
  case NdbDictionary::Column::Undefined:
  case NdbDictionary::Column::Text:
  case NdbDictionary::Column::Year:
  case NdbDictionary::Column::Timestamp:
    abort();
    break;
  }
  
  return buf;
} 

int
HugoCalculator::verifyRowValues(NDBT_ResultRow* const  pRow) const{
  int id, updates;

  id = pRow->attributeStore(m_idCol)->u_32_value();
  updates = pRow->attributeStore(m_updatesCol)->u_32_value();
  int result = 0;	  
  
  // Check the values of each column
  for (int i = 0; i<m_tab.getNoOfColumns(); i++){
    if (i != m_updatesCol && id != m_idCol) {
      const NdbDictionary::Column* attr = m_tab.getColumn(i);      
      Uint32 len = attr->getSizeInBytes(), real_len;
      char buf[NDB_MAX_TUPLE_SIZE];
      const char* res = calcValue(id, i, updates, buf, len, &real_len);
      if (res == NULL){
	if (!pRow->attributeStore(i)->isNULL()){
	  g_err << "|- NULL ERROR: expected a NULL but the column was not null" << endl;
	  g_err << "|- The row: \"" << (*pRow) << "\"" << endl;
	  result = -1;
	}
      } else{
	if (real_len != pRow->attributeStore(i)->get_size_in_bytes())
	{
	  g_err << "|- Invalid data found in attribute " << i << ": \""
		<< "Length of expected=" << real_len << endl
		<< "Lenght of read=" 
		<< pRow->attributeStore(i)->get_size_in_bytes() << endl;
	  result= -1;
	}
	else if (memcmp(res, pRow->attributeStore(i)->aRef(), real_len) != 0)
	{
	  g_err << "Column: " << attr->getName() << endl;
	  const char* buf2 = pRow->attributeStore(i)->aRef();
	  for (Uint32 j = 0; j < len; j++)
	  {
	    g_err << j << ":" << hex << (Uint32)(Uint8)buf[j] << "[" << hex << (Uint32)(Uint8)buf2[j] << "]";
	    if (buf[j] != buf2[j])
	    {
	      g_err << "==>Match failed!";
	    }
	    g_err << endl;
	  }
	  g_err << endl;
	  g_err << "|- Invalid data found in attribute " << i << ": \""
		<< pRow->attributeStore(i)->aRef()
		<< "\" != \"" << res << "\"" << endl
		<< "Length of expected=" << (unsigned)strlen(res) << endl
		<< "Lenght of read="
		<< pRow->attributeStore(i)->get_size_in_bytes() << endl;
	  g_err << "|- The row: \"" << (* pRow) << "\"" << endl;
	  result = -1;
	}
      }
    }
  }
  return result;
}


int
HugoCalculator::verifyRecAttr(int record,
                              int updates,
                              const NdbRecAttr* recAttr)
{
  const char* valPtr = NULL;
  int attrib = recAttr->getColumn()->getAttrId();
  Uint32 valLen = recAttr->get_size_in_bytes();
  if (!recAttr->isNULL())
    valPtr= (const char*) recAttr->aRef();
  
  return verifyColValue(record,
                        attrib,
                        updates,
                        valPtr,
                        valLen);
}

int
HugoCalculator::verifyColValue(int record, 
                               int attrib,
                               int updates,
                               const char* valPtr,
                               Uint32 valLen)
{
  int result = 0;	  
  
  if (attrib == m_updatesCol)
  {
    int val= *((const int*) valPtr);
    if (val != updates)
    {
      g_err << "|- Updates column (" << attrib << ")" << endl;
      g_err << "|- Expected " << updates << " but found " << val << endl;
      result = -1;
    }
  }
  else if (attrib == m_idCol)
  {
    int val= *((const int*) valPtr);
    if (val != record)
    {
      g_err << "|- Identity column (" << attrib << ")" << endl;
      g_err << "|- Expected " << record << " but found " << val << endl;
      result = -1;
    }
  }
  else
  {
    /* 'Normal' data column */
    const NdbDictionary::Column* attr = m_tab.getColumn(attrib);      
    Uint32 len = attr->getSizeInBytes(), real_len;
    char buf[NDB_MAX_TUPLE_SIZE];
    const char* res = calcValue(record, attrib, updates, buf, len, &real_len);
    if (res == NULL){
      if (valPtr != NULL){
        g_err << "|- NULL ERROR: expected a NULL but the column was not null" << endl;
        g_err << "|- Column length is " << valLen << " bytes" << endl;
        g_err << "|- Column data follows :" << endl;
        for (Uint32 j = 0; j < valLen; j ++)
        {
          g_err << j << ":" << hex << (Uint32)(Uint8)valPtr[j] << endl;
        }
        result = -1;
      }
    } else{
      if (real_len != valLen)
      {
        g_err << "|- Invalid data found in attribute " << attrib << ": \""
              << "Length of expected=" << real_len << endl
              << "Length of passed=" 
              << valLen << endl;
        result= -1;
      }
      else if (memcmp(res, valPtr, real_len) != 0)
      {
        g_err << "|- Expected data mismatch on column "
              << attr->getName() << " length " << real_len 
              << " bytes " << endl;
        g_err << "|- Bytewise comparison follows :" << endl;
        for (Uint32 j = 0; j < real_len; j++)
        {
          g_err << j << ":" << hex << (Uint32)(Uint8)buf[j] << "[" << hex << (Uint32)(Uint8)valPtr[j] << "]";
          if (buf[j] != valPtr[j])
          {
            g_err << "==>Match failed!";
          }
          g_err << endl;
        }
        g_err << endl;
        result = -1;
      }
    }    
  }

  return result;
}

int
HugoCalculator::getIdValue(NDBT_ResultRow* const pRow) const {
  return pRow->attributeStore(m_idCol)->u_32_value();
}  

int
HugoCalculator::getUpdatesValue(NDBT_ResultRow* const pRow) const {
  return pRow->attributeStore(m_updatesCol)->u_32_value();
}

int
HugoCalculator::equalForRow(Uint8 * pRow,
                            const NdbRecord* pRecord,
                            int rowId)
{
  for(int attrId = 0; attrId < m_tab.getNoOfColumns(); attrId++)
  {
    const NdbDictionary::Column* attr = m_tab.getColumn(attrId);

    if (attr->getPrimaryKey() == true)
    {
      char buf[8000];
      int len = attr->getSizeInBytes();
      memset(buf, 0, sizeof(buf));
      Uint32 real_len;
      const char * value = calcValue(rowId, attrId, 0, buf,
                                     len, &real_len);
      assert(value != 0); // NULLable PK not supported...
      Uint32 off = 0;
      bool ret = NdbDictionary::getOffset(pRecord, attrId, off);
      if (!ret)
        abort();
      memcpy(pRow + off, buf, real_len);
    }
  }
  return NDBT_OK;
}

int
HugoCalculator::setValues(Uint8 * pRow,
                          const NdbRecord* pRecord,
                          int rowId,
                          int updateVal)
{
  int res = equalForRow(pRow, pRecord, rowId);
  if (res != 0)
  {
    return res;
  }

  for(int attrId = 0; attrId < m_tab.getNoOfColumns(); attrId++)
  {
    const NdbDictionary::Column* attr = m_tab.getColumn(attrId);

    if (attr->getPrimaryKey() == false)
    {
      char buf[8000];
      int len = attr->getSizeInBytes();
      memset(buf, 0, sizeof(buf));
      Uint32 real_len;
      const char * value = calcValue(rowId, attrId, updateVal, buf,
                                     len, &real_len);
      if (value != 0)
      {
        Uint32 off = 0;
        bool ret = NdbDictionary::getOffset(pRecord, attrId, off);
        if (!ret)
          abort();
        memcpy(pRow + off, buf, real_len);
        if (attr->getNullable())
          NdbDictionary::setNull(pRecord, (char*)pRow, attrId, false);
      }
      else
      {
        assert(attr->getNullable());
        NdbDictionary::setNull(pRecord, (char*)pRow, attrId, true);
      }
    }
  }

  return NDBT_OK;
}
