/*
   Copyright (c) 2003, 2018, 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, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   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, version 2.0, 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 <ndb_opts.h>

#include <NdbOut.hpp>

#include <NdbApi.hpp>
#include <NDBT.hpp> 
#include <NdbSleep.h>
#include <UtilTransactions.hpp>

#include "my_alloc.h"
 
static int 
select_count(Ndb* pNdb, const NdbDictionary::Table* pTab,
	     int parallelism,
	     Uint64* count_rows,
	     NdbOperation::LockMode lock);

static const char* _dbname = "TEST_DB";
static int _parallelism = 240;
static int _lock = 0;

static struct my_option my_long_options[] =
{
  NDB_STD_OPTS("ndb_select_count"),
  { "database", 'd', "Name of database table is in",
    (uchar**) &_dbname, (uchar**) &_dbname, 0,
    GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0 },
  { "parallelism", 'p', "parallelism",
    (uchar**) &_parallelism, (uchar**) &_parallelism, 0,
    GET_INT, REQUIRED_ARG, 240, 0, 0, 0, 0, 0 }, 
  { "lock", 'l', "Read(0), Read-hold(1), Exclusive(2)",
    (uchar**) &_lock, (uchar**) &_lock, 0,
    GET_INT, REQUIRED_ARG, 0, 0, 0, 0, 0, 0 }, 
  { 0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}
};

static void short_usage_sub(void)
{
  ndb_short_usage_sub("<table name>[, <table name>[, ...]]");
}

int main(int argc, char** argv){
  NDB_INIT(argv[0]);
  Ndb_opts opts(argc, argv, my_long_options);
  opts.set_usage_funcs(short_usage_sub);
#ifndef DBUG_OFF
  opt_debug= "d:t:O,/tmp/ndb_select_count.trace";
#endif
  if (opts.handle_options())
    return NDBT_ProgramExit(NDBT_WRONGARGS);
  if (argc < 1) {
    opts.usage();
    return NDBT_ProgramExit(NDBT_WRONGARGS);
  }

  Ndb_cluster_connection con(opt_ndb_connectstring, opt_ndb_nodeid);
  con.set_name("ndb_select_count");
  if(con.connect(opt_connect_retries - 1, opt_connect_retry_delay, 1) != 0)
  {
    ndbout << "Unable to connect to management server." << endl;
    return NDBT_ProgramExit(NDBT_FAILED);
  }
  if (con.wait_until_ready(30,0) < 0)
  {
    ndbout << "Cluster nodes not ready in 30 seconds." << endl;
    return NDBT_ProgramExit(NDBT_FAILED);
  }

  Ndb MyNdb(&con, _dbname );
  if(MyNdb.init() != 0){
    NDB_ERR(MyNdb.getNdbError());
    return NDBT_ProgramExit(NDBT_FAILED);
  }

  for(int i = 0; i<argc; i++){
    // Check if table exists in db
    const NdbDictionary::Table * pTab = NDBT_Table::discoverTableFromDb(&MyNdb, argv[i]);
    if(pTab == NULL){
      ndbout << " Table " << argv[i] << " does not exist!" << endl;
      continue;
    }

    Uint64 rows = 0;
    if (select_count(&MyNdb, pTab, _parallelism, &rows, 
		     (NdbOperation::LockMode)_lock) != 0){
      return NDBT_ProgramExit(NDBT_FAILED);
    }
    
    ndbout << rows << " records in table " << argv[i] << endl;
  }
  return NDBT_ProgramExit(NDBT_OK);
}

int 
select_count(Ndb* pNdb, const NdbDictionary::Table* pTab,
	     int parallelism,
	     Uint64* count_rows,
	     NdbOperation::LockMode lock){
  
  int                  retryAttempt = 0;
  const int            retryMax = 100;
  int                  check;
  NdbTransaction       *pTrans;
  NdbScanOperation	       *pOp;
  const Uint32 codeWords= 1;
  Uint32 codeSpace[ codeWords ];
  NdbInterpretedCode code(NULL, // Table is irrelevant
                          &codeSpace[0],
                          codeWords);
  if ((code.interpret_exit_last_row() != 0) ||
      (code.finalise() != 0))
  {
    NDB_ERR(code.getNdbError());
    return NDBT_FAILED;
  }

  while (true){

    if (retryAttempt >= retryMax){
      g_info << "ERROR: has retried this operation " << retryAttempt 
	     << " times, failing!" << endl;
      return NDBT_FAILED;
    }

    pTrans = pNdb->startTransaction();
    if (pTrans == NULL) {
      const NdbError err = pNdb->getNdbError();

      if (err.status == NdbError::TemporaryError){
	NdbSleep_MilliSleep(50);
	retryAttempt++;
	continue;
      }
      NDB_ERR(err);
      return NDBT_FAILED;
    }
    pOp = pTrans->getNdbScanOperation(pTab->getName());	
    if (pOp == NULL) {
      NDB_ERR(pTrans->getNdbError());
      pNdb->closeTransaction(pTrans);
      return NDBT_FAILED;
    }

    if( pOp->readTuples(NdbScanOperation::LM_Dirty) ) {
      NDB_ERR(pTrans->getNdbError());
      pNdb->closeTransaction(pTrans);
      return NDBT_FAILED;
    }


    check = pOp->setInterpretedCode(&code);
    if( check == -1 ) {
      NDB_ERR(pTrans->getNdbError());
      pNdb->closeTransaction(pTrans);
      return NDBT_FAILED;
    }
  
    Uint64 tmp;
    Uint32 row_size;
    pOp->getValue(NdbDictionary::Column::ROW_COUNT, (char*)&tmp);
    pOp->getValue(NdbDictionary::Column::ROW_SIZE, (char*)&row_size);
    check = pTrans->execute(NdbTransaction::NoCommit);
    if( check == -1 ) {
      NDB_ERR(pTrans->getNdbError());
      pNdb->closeTransaction(pTrans);
      return NDBT_FAILED;
    }
    
    Uint64 row_count = 0;
    int eof;
    while((eof = pOp->nextResult(true)) == 0){
      row_count += tmp;
    }
    
    if (eof == -1) {
      const NdbError err = pTrans->getNdbError();
      
      if (err.status == NdbError::TemporaryError){
	pNdb->closeTransaction(pTrans);
	NdbSleep_MilliSleep(50);
	retryAttempt++;
	continue;
      }
      NDB_ERR(err);
      pNdb->closeTransaction(pTrans);
      return NDBT_FAILED;
    }
    
    pNdb->closeTransaction(pTrans);
    
    if (count_rows != NULL){
      *count_rows = row_count;
    }
    
    return NDBT_OK;
  }
  return NDBT_FAILED;
}