/*
   Copyright (c) 2004, 2013, 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 <NDBT.hpp>
#include <NDBT_Test.hpp>
#include <HugoTransactions.hpp>
#include <UtilTransactions.hpp>
#include <random.h>
#include <getarg.h>

struct Parameter {
  const char * name;
  unsigned value;
  unsigned min;
  unsigned max; 
};

#define P_BATCH   0
#define P_PARRA   1
#define P_LOCK    2
#define P_FILT    3
#define P_BOUND   4
#define P_ACCESS  5
#define P_FETCH   6
#define P_ROWS    7
#define P_LOOPS   8
#define P_CREATE  9
#define P_MULTI  11

#define P_MAX 12

/* Note that this tool can only be run against Hugo tables with an integer
 * primary key
 */

static 
Parameter 
g_paramters[] = {
  { "batch",       0, 0, 1 }, // 0, 15
  { "parallelism", 0, 0, 1 }, // 0,  1
  { "lock",        0, 0, 2 }, // read, exclusive, dirty
  { "filter",      0, 0, 3 }, // Use ScanFilter to return : all, none, 1, 100
  { "range",       0, 0, 3 }, // Use IndexBounds to return : all, none, 1, 100
  // For range==3, Multiple index scans are used with a number of ranges specified
  // per scan (Number is defined by multi read range.
  { "access",      0, 0, 2 }, // Table, Index or Ordered Index scan
  { "fetch",       0, 0, 1 }, // nextResult fetchAllowed.  No, yes
  { "size",  1000000, 1, UINT_MAX }, // Num rows to operate on
  { "iterations",  3, 1, UINT_MAX }, // Num times to repeat tests
  { "create_drop", 1, 0, 2 }, // Whether to recreate the table
  { "data",        1, 0, 1 }, // Ignored currently
  { "multi read range", 1000, 1, UINT_MAX } // Number of ranges to use in MRR access (range=3)
};

static Ndb* g_ndb = 0;
static const NdbDictionary::Table * g_table;
static const NdbDictionary::Index * g_index;
static char g_tablename[256];
static char g_indexname[256];
static const NdbRecord * g_table_record;
static const NdbRecord * g_index_record;

int create_table();
int run_scan();

int
main(int argc, const char** argv){
  ndb_init();
  int verbose = 1;
  int optind = 0;

  struct getargs args[1+P_MAX] = {
    { "verbose", 'v', arg_flag, &verbose, "Print verbose status", "verbose" }
  };
  const int num_args = 1 + P_MAX;
  int i;
  for(i = 0; i<P_MAX; i++){
    args[i+1].long_name = g_paramters[i].name;
    args[i+1].short_name = * g_paramters[i].name;
    args[i+1].type = arg_integer;
    args[i+1].value = &g_paramters[i].value;
    BaseString tmp;
    tmp.assfmt("min: %d max: %d", g_paramters[i].min, g_paramters[i].max);
    args[i+1].help = strdup(tmp.c_str());
    args[i+1].arg_help = 0;
  }
  
  if(getarg(args, num_args, argc, argv, &optind)) {
    arg_printusage(args, num_args, argv[0], "tabname1 tabname2 ...");
    return NDBT_WRONGARGS;
  }

  myRandom48Init((long)NdbTick_CurrentMillisecond());

  Ndb_cluster_connection con;
  if(con.connect(12, 5, 1))
  {
    return NDBT_ProgramExit(NDBT_FAILED);
  }

  g_ndb = new Ndb(&con, "TEST_DB");
  if(g_ndb->init() != 0){
    g_err << "init() failed" << endl;
    goto error;
  }
  if(g_ndb->waitUntilReady() != 0){
    g_err << "Wait until ready failed" << endl;
    goto error;
  }
  for(i = optind; i<argc; i++){
    const char * T = argv[i];
    g_info << "Testing " << T << endl;
    BaseString::snprintf(g_tablename, sizeof(g_tablename), "%s", T);
    BaseString::snprintf(g_indexname, sizeof(g_indexname), "IDX_%s", T);
    if(create_table())
      goto error;
    if(g_paramters[P_CREATE].value != 2 && run_scan())
      goto error;
  }

  if(g_ndb) delete g_ndb;
  return NDBT_OK;
 error:
  if(g_ndb) delete g_ndb;
  return NDBT_FAILED;
}

int
create_table(){
  NdbDictionary::Dictionary* dict = g_ndb->getDictionary();
  require(dict);
  if(g_paramters[P_CREATE].value){
    g_ndb->getDictionary()->dropTable(g_tablename);
    const NdbDictionary::Table * pTab = NDBT_Tables::getTable(g_tablename);
    require(pTab);
    NdbDictionary::Table copy = * pTab;
    copy.setLogging(false);
    if(dict->createTable(copy) != 0){
      g_err << "Failed to create table: " << g_tablename << endl;
      return -1;
    }

    NdbDictionary::Index x(g_indexname);
    x.setTable(g_tablename);
    x.setType(NdbDictionary::Index::OrderedIndex);
    x.setLogging(false);
    for (unsigned k = 0; k < (unsigned) copy.getNoOfColumns(); k++){
      if(copy.getColumn(k)->getPrimaryKey()){
	x.addColumnName(copy.getColumn(k)->getName());
      }
    }

    if(dict->createIndex(x) != 0){
      g_err << "Failed to create index: " << endl;
      return -1;
    }
  }
  g_table = dict->getTable(g_tablename);
  g_index = dict->getIndex(g_indexname, g_tablename);
  require(g_table);
  require(g_index);

  /* Obtain NdbRecord instances for the table and index */
  {
    NdbDictionary::RecordSpecification spec[ NDB_MAX_ATTRIBUTES_IN_TABLE ];
    
    Uint32 offset=0;
    Uint32 cols= g_table->getNoOfColumns();
    for (Uint32 colNum=0; colNum<cols; colNum++)
    {
      const NdbDictionary::Column* col= g_table->getColumn(colNum);
      Uint32 colLength= col->getLength();
      
      spec[colNum].column= col;
      spec[colNum].offset= offset;

      offset+= colLength;

      spec[colNum].nullbit_byte_offset= offset++;
      spec[colNum].nullbit_bit_in_byte= 0;
    }
  
    g_table_record= dict->createRecord(g_table,
                                       &spec[0],
                                       cols,
                                       sizeof(NdbDictionary::RecordSpecification));

    require(g_table_record);
  }
  {
    NdbDictionary::RecordSpecification spec[ NDB_MAX_ATTRIBUTES_IN_TABLE ];
    
    Uint32 offset=0;
    Uint32 cols= g_index->getNoOfColumns();
    for (Uint32 colNum=0; colNum<cols; colNum++)
    {
      /* Get column from the underlying table */
      // TODO : Add this mechanism to dict->createRecord
      // TODO : Add NdbRecord queryability methods so that an NdbRecord can
      // be easily built and later used to read out data.
      const NdbDictionary::Column* col= 
        g_table->getColumn(g_index->getColumn(colNum)->getName());
      Uint32 colLength= col->getLength();
      
      spec[colNum].column= col;
      spec[colNum].offset= offset;

      offset+= colLength;

      spec[colNum].nullbit_byte_offset= offset++;
      spec[colNum].nullbit_bit_in_byte= 0;
    }
  
    g_index_record= dict->createRecord(g_index,
                                       &spec[0],
                                       cols,
                                       sizeof(NdbDictionary::RecordSpecification));

    require(g_index_record);
  }


  if(g_paramters[P_CREATE].value)
  {
    int rows = g_paramters[P_ROWS].value;
    HugoTransactions hugoTrans(* g_table);
    if (hugoTrans.loadTable(g_ndb, rows)){
      g_err.println("Failed to load %s with %d rows", 
		    g_table->getName(), rows);
      return -1;
    }
  }
  
  return 0;
}

inline 
void err(NdbError e){
  ndbout << e << endl;
}

int
setEqBound(NdbIndexScanOperation *isop,
           const NdbRecord *key_record,
           Uint32 value,
           Uint32 rangeNum)
{
  Uint32 space[2];
  space[0]= value;
  space[1]= 0; // Null bit set to zero.

  NdbIndexScanOperation::IndexBound ib;
  ib.low_key= ib.high_key= (char*) &space;
  ib.low_key_count= ib.high_key_count= 1;
  ib.low_inclusive= ib.high_inclusive= true;
  ib.range_no= rangeNum;

  return isop->setBound(key_record, ib);
}

int
run_scan(){
  int iter = g_paramters[P_LOOPS].value;
  Uint64 start1, stop;
  int sum_time= 0;

  Uint32 sample_rows = 0;
  int tot_rows = 0;
  Uint64 sample_start = NdbTick_CurrentMillisecond();

  Uint32 tot = g_paramters[P_ROWS].value;

  if(g_paramters[P_BOUND].value >= 2 || g_paramters[P_FILT].value == 2)
    iter *= g_paramters[P_ROWS].value;

  NdbScanOperation * pOp = 0;
  NdbIndexScanOperation * pIOp = 0;
  NdbConnection * pTrans = 0;
  int check = 0;

  for(int i = 0; i<iter; i++){
    start1 = NdbTick_CurrentMillisecond();
    pTrans = pTrans ? pTrans : g_ndb->startTransaction();
    if(!pTrans){
      g_err << "Failed to start transaction" << endl;
      err(g_ndb->getNdbError());
      return -1;
    }
    
    int par = g_paramters[P_PARRA].value;
    int bat = g_paramters[P_BATCH].value;
    NdbScanOperation::LockMode lm;
    switch(g_paramters[P_LOCK].value){
    case 0:
      lm = NdbScanOperation::LM_CommittedRead;
      break;
    case 1:
      lm = NdbScanOperation::LM_Read;
      break;
    case 2:
      lm = NdbScanOperation::LM_Exclusive;
      break;
    default:
      abort();
    }

    NdbScanOperation::ScanOptions options;
    bzero(&options, sizeof(options));

    options.optionsPresent= 
      NdbScanOperation::ScanOptions::SO_SCANFLAGS |
      NdbScanOperation::ScanOptions::SO_PARALLEL |
      NdbScanOperation::ScanOptions::SO_BATCH;

    bool ord= g_paramters[P_ACCESS].value == 2;
    bool mrr= (g_paramters[P_ACCESS].value != 0) &&
      (g_paramters[P_BOUND].value == 3);

    options.scan_flags|= 
      ( ord ? NdbScanOperation::SF_OrderBy:0 ) |
      ( mrr ? NdbScanOperation::SF_MultiRange:0 );
    options.parallel= par;
    options.batch= bat;

    switch(g_paramters[P_FILT].value){
    case 0: // All
      break;
    case 1: // None
      break;
    case 2:  // 1 row
    default: {
      require(g_table->getNoOfPrimaryKeys() == 1); // only impl. so far
      abort();
#if 0
      int tot = g_paramters[P_ROWS].value;
      int row = rand() % tot;
      NdbInterpretedCode* ic= new NdbInterpretedCode(g_table);
      NdbScanFilter filter(ic);   
      filter.begin(NdbScanFilter::AND);
      filter.eq(0, row);
      filter.end();

      options.scan_flags|= NdbScanOperation::SF_Interpreted;
      options.interpretedCode= &ic;
      break;
#endif
    }
    }
    
    if(g_paramters[P_ACCESS].value == 0){
      pOp = pTrans->scanTable(g_table_record,
                              lm,
                              NULL, // Mask
                              &options,
                              sizeof(NdbScanOperation::ScanOptions));
      require(pOp);
    } else {
      pOp= pIOp= pTrans->scanIndex(g_index_record,
                                   g_table_record,
                                   lm,
                                   NULL, // Mask
                                   NULL, // First IndexBound
                                   &options,
                                   sizeof(NdbScanOperation::ScanOptions));
      if (pIOp == NULL)
      {
        err(pTrans->getNdbError());
        abort();
      }
        
      require(pIOp);

      switch(g_paramters[P_BOUND].value){
      case 0: // All
	break;
      case 1: // None
        check= setEqBound(pIOp, g_index_record, 0, 0);
        require(check == 0);
	break;
      case 2: { // 1 row
      default:  
	require(g_table->getNoOfPrimaryKeys() == 1); // only impl. so far
	int tot = g_paramters[P_ROWS].value;
	int row = rand() % tot;

        check= setEqBound(pIOp, g_index_record, row, 0);
        require(check == 0);
	break;
      }
      case 3: { // read multi
	int multi = g_paramters[P_MULTI].value;
	int tot = g_paramters[P_ROWS].value;
        int rangeStart= i;
        for(; multi > 0 && i < iter; --multi, i++)
	{
	  int row = rand() % tot;
          /* Set range num relative to this set of bounds */
          check= setEqBound(pIOp, g_index_record, row, i- rangeStart);
          if (check != 0)
          {
            err(pIOp->getNdbError());
            abort();
          }
          require(check == 0);
	}
	break;
      }
      }
    }
    require(pOp);
    
    require(check == 0);

    int rows = 0;
    check = pTrans->execute(NoCommit);
    require(check == 0);
    int fetch = g_paramters[P_FETCH].value;

    const char * result_row_ptr;

    while((check = pOp->nextResult(&result_row_ptr, true, false)) == 0){
      do {
	rows++;
      } while(!fetch && ((check = pOp->nextResult(&result_row_ptr, false, false)) == 0));
      if(check == -1){
        err(pTrans->getNdbError());
        return -1;
      }
      require(check == 2);
    }

    if(check == -1){
      err(pTrans->getNdbError());
      return -1;
    }
    require(check == 1);

    pTrans->close();
    pTrans = 0;

    stop = NdbTick_CurrentMillisecond();
    
    int time_passed= (int)(stop - start1);
    sample_rows += rows;
    sum_time+= time_passed;
    tot_rows+= rows;
    
    if(sample_rows >= tot)
    {
      int sample_time = (int)(stop - sample_start);
      g_info << "Found " << sample_rows << " rows" << endl;
      g_err.println("Time: %d ms = %u rows/sec", sample_time,
		    (1000*sample_rows)/sample_time);
      sample_rows = 0;
      sample_start = stop;
    }
  }
  
  g_err.println("Avg time: %d ms = %u rows/sec", sum_time/tot_rows,
                (1000*tot_rows)/sum_time);
  return 0;
}