/*
   Copyright (C) 2003-2006 MySQL AB
    All rights reserved. Use is subject to license terms.

   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 <NdbHost.h>
#include <NdbSleep.h>
#include <NdbThread.h>
#include <NdbMain.h>
#include <NdbOut.hpp>
#include <NdbEnv.h>
#include <NdbTest.hpp>

#include "userInterface.h"
#include "dbGenerator.h"

static int   numProcesses;
static int   numSeconds;
static int   numWarmSeconds;
static int   parallellism;
static int   millisSendPoll;
static int   minEventSendPoll;
static int   forceSendPoll;

static ThreadData *data;

static void usage(const char *prog)
{
  const char  *progname;

   /*--------------------------------------------*/
   /* Get the name of the program (without path) */
   /*--------------------------------------------*/
   progname = strrchr(prog, '/');

   if (progname == 0)
     progname = prog;
   else
     ++progname;

   ndbout_c(
           "Usage: %s [-proc <num>] [-warm <num>] [-time <num>] [ -p <num>] " 
	   "[-t <num> ] [ -e <num> ] [ -f <num>] \n"
           "  -proc <num>    Specifies that <num> is the number of\n"
           "                 threads. The default is 1.\n"
           "  -time <num>    Specifies that the test will run for <num> sec.\n"
           "                 The default is 10 sec\n"
           "  -warm <num>    Specifies the warm-up/cooldown period of <num> "
	   "sec.\n"
           "                 The default is 10 sec\n"
	   "  -p <num>       The no of parallell transactions started by "
	   "one thread\n"
	   "  -e <num>       Minimum no of events before wake up in call to "
	   "sendPoll\n"
	   "                 Default is 1\n"
	   "  -f <num>       force parameter to sendPoll\n"
	   "                 Default is 0\n",
           progname);
}

static
int
parse_args(int argc, const char **argv)
{
   int i;

   numProcesses     = 1;
   numSeconds       = 10;
   numWarmSeconds   = 10;
   parallellism     = 1;
   millisSendPoll   = 10000;
   minEventSendPoll = 1;
   forceSendPoll    = 0;
   

   i = 1;
   while (i < argc){
     if (strcmp("-proc",argv[i]) == 0) {
       if (i + 1 >= argc) {
	 return 1;
       }
       if (sscanf(argv[i+1], "%d", &numProcesses) == -1 ||
	   numProcesses <= 0 || numProcesses > 127) {
	 ndbout_c("-proc flag requires a positive integer argument [1..127]");
	 return 1;
       }
       i += 2;
     } else if (strcmp("-p", argv[i]) == 0){
       if(i + 1 >= argc){
	 usage(argv[0]);
	 return 1;
       }
       if (sscanf(argv[i+1], "%d", &parallellism) == -1 ||
	   parallellism <= 0){
	 ndbout_c("-p flag requires a positive integer argument");
	 return 1;
       }
       i += 2;
     }
     else if (strcmp("-time",argv[i]) == 0) {
       if (i + 1 >= argc) {
	 return 1;
       }
       if (sscanf(argv[i+1], "%d", &numSeconds) == -1 ||
	   numSeconds < 0) {
	 ndbout_c("-time flag requires a positive integer argument");
	 return 1;
       }
       i += 2;
     }
     else if (strcmp("-warm",argv[i]) == 0) {
       if (i + 1 >= argc) {
	 return 1;
       }
       if (sscanf(argv[i+1], "%d", &numWarmSeconds) == -1 ||
	   numWarmSeconds < 0) {
	 ndbout_c("-warm flag requires a positive integer argument");
	 return 1;
       }
       i += 2;
     }
     else if (strcmp("-e",argv[i]) == 0) {
       if (i + 1 >= argc) {
	 return 1;
       }
       if (sscanf(argv[i+1], "%d", &minEventSendPoll) == -1 ||
	   minEventSendPoll < 0) {
	 ndbout_c("-e flag requires a positive integer argument");
	 return 1;
       }
       i += 2;
     }
     else if (strcmp("-f",argv[i]) == 0) {
       if (i + 1 >= argc) {
	 usage(argv[0]);
	 return 1;
       }
       if (sscanf(argv[i+1], "%d", &forceSendPoll) == -1 ||
	   forceSendPoll < 0) {
	 ndbout_c("-f flag requires a positive integer argument");
	 return 1;
       }
       i += 2;
     }
     else {
       return 1;
     }
   }

   if(minEventSendPoll > parallellism){
     ndbout_c("minEventSendPoll(%d) > parallellism(%d)",
	     minEventSendPoll, parallellism);
     ndbout_c("not very good...");
     ndbout_c("very bad...");
     ndbout_c("exiting...");
     return 1;
   }
   return 0;
}

static 
void 
print_transaction(const char            *header,
		  unsigned long          totalCount,
		  TransactionDefinition *trans,
		  unsigned int           printBranch,
		  unsigned int           printRollback)
{
  double f;
  
  ndbout_c("  %s: %d (%.2f%%) "
	   "Latency(ms) avg: %d min: %d max: %d std: %d n: %d",
	   header,
	   trans->count,
	   (double)trans->count / (double)totalCount * 100.0,
	   (int)trans->latency.getMean(),
	   (int)trans->latency.getMin(),
	   (int)trans->latency.getMax(),
	   (int)trans->latency.getStddev(),
	   (int)trans->latency.getCount()
	   );
  
  if( printBranch ){
    if( trans->count == 0 )
      f = 0.0;
    else
      f = (double)trans->branchExecuted / (double)trans->count * 100.0;
    ndbout_c("      Branches Executed: %d (%.2f%%)", trans->branchExecuted, f);
  }
  
  if( printRollback ){
    if( trans->count == 0 )
      f = 0.0;
    else
      f = (double)trans->rollbackExecuted / (double)trans->count * 100.0;
    ndbout_c("      Rollback Executed: %d (%.2f%%)",trans->rollbackExecuted,f);
  }
}

void 
print_stats(const char       *title,
	    unsigned int      length,
	    unsigned int      transactionFlag,
	    GeneratorStatistics *gen,
	    int numProc, int parallellism)
{
  int    i;
  char buf[10];
  char name[MAXHOSTNAMELEN];
  
  name[0] = 0;
  NdbHost_GetHostName(name);
  
  ndbout_c("\n------ %s ------",title);
  ndbout_c("Length        : %d %s",
	 length,
	 transactionFlag ? "Transactions" : "sec");
  ndbout_c("Processor     : %s", name);
  ndbout_c("Number of Proc: %d",numProc);
  ndbout_c("Parallellism  : %d", parallellism);
  ndbout_c("\n");

  if( gen->totalTransactions == 0 ) {
    ndbout_c("   No Transactions for this test");
  }
  else {
    for(i = 0; i < 5; i++) {
      sprintf(buf, "T%d",i+1);
      print_transaction(buf,
			gen->totalTransactions,
			&gen->transactions[i],
			i >= 2,
			i >= 3 );
    }
    
    ndbout_c("\n");
    ndbout_c("  Overall Statistics:");
    ndbout_c("     Transactions: %d", gen->totalTransactions);
    ndbout_c("     Outer       : %.0f TPS",gen->outerTps);
    ndbout_c("\n");
  }
}

static 
void *
threadRoutine(void *arg)
{
  int i;
  ThreadData *data = (ThreadData *)arg;
  Ndb * pNDB;

  pNDB = asyncDbConnect(parallellism);		      
  /* NdbSleep_MilliSleep(rand() % 10); */

  for(i = 0; i<parallellism; i++){
    data[i].pNDB = pNDB;
  }
  millisSendPoll = 30000;
  asyncGenerator(data, parallellism,
		 millisSendPoll, minEventSendPoll, forceSendPoll);

  asyncDbDisconnect(pNDB);

  return NULL;
}

NDB_COMMAND(DbAsyncGenerator, "DbAsyncGenerator",
	    "DbAsyncGenerator", "DbAsyncGenerator", 65535)
{
  ndb_init();
  int i;
  int j;
  int k;
  struct NdbThread* pThread = NULL;
  GeneratorStatistics  stats;
  GeneratorStatistics *p;
  char threadName[32];
  int rc = NDBT_OK;
  void* tmp = NULL;
  if(parse_args(argc,argv) != 0){
    usage(argv[0]);
    return NDBT_ProgramExit(NDBT_WRONGARGS);
  }
    

  ndbout_c("\nStarting Test with %d process(es) for %d %s parallellism %d",
	   numProcesses,
	   numSeconds,
	   "sec",
	   parallellism);

  ndbout_c("   WarmUp/coolDown = %d sec", numWarmSeconds);
  
  data = (ThreadData*)malloc((numProcesses*parallellism)*sizeof(ThreadData));
 
  for(i = 0; i < numProcesses; i++) {
    for(j = 0; j<parallellism; j++){
      data[i*parallellism+j].warmUpSeconds   = numWarmSeconds;
      data[i*parallellism+j].testSeconds     = numSeconds;
      data[i*parallellism+j].coolDownSeconds = numWarmSeconds;
      data[i*parallellism+j].randomSeed      = 
	NdbTick_CurrentMillisecond()+i+j;
      data[i*parallellism+j].changedTime     = 0;
      data[i*parallellism+j].runState        = Runnable;
    }
    sprintf(threadName, "AsyncThread[%d]", i);
    pThread = NdbThread_Create(threadRoutine, 
			      (void**)&data[i*parallellism], 
			      65535, 
			      threadName,
                              NDB_THREAD_PRIO_LOW);
    if(pThread != 0 && pThread != NULL){
      (&data[i*parallellism])->pThread = pThread;
    } else {      
      perror("Failed to create thread");
      rc = NDBT_FAILED;
    }
  }

  showTime();

  /*--------------------------------*/
  /* Wait for all processes to exit */
  /*--------------------------------*/
  for(i = 0; i < numProcesses; i++) {
    NdbThread_WaitFor(data[i*parallellism].pThread, &tmp);
    NdbThread_Destroy(&data[i*parallellism].pThread);
  }
   
  ndbout_c("All threads have finished");
  
  /*-------------------------------------------*/
  /* Clear all structures for total statistics */
  /*-------------------------------------------*/
  stats.totalTransactions = 0;
  stats.outerTps          = 0.0;
  
  for(i = 0; i < NUM_TRANSACTION_TYPES; i++ ) {
    stats.transactions[i].count            = 0;
    stats.transactions[i].branchExecuted   = 0;
    stats.transactions[i].rollbackExecuted = 0;
    stats.transactions[i].latency.reset();
  }
  
  /*--------------------------------*/
  /* Add the values for all Threads */
  /*--------------------------------*/
  for(i = 0; i < numProcesses; i++) {
    for(k = 0; k<parallellism; k++){
      p = &data[i*parallellism+k].generator;
      
      stats.totalTransactions += p->totalTransactions;
      stats.outerTps          += p->outerTps;
      
      for(j = 0; j < NUM_TRANSACTION_TYPES; j++ ) {
	stats.transactions[j].count += 
	  p->transactions[j].count;
	stats.transactions[j].branchExecuted += 
	  p->transactions[j].branchExecuted;
	stats.transactions[j].rollbackExecuted += 
	  p->transactions[j].rollbackExecuted;
	stats.transactions[j].latency += 
	  p->transactions[j].latency;
      }
    }
  }

  print_stats("Test Results", 
	      numSeconds,
	      0,
	      &stats,
	      numProcesses,
	      parallellism);

  free(data);
  
  NDBT_ProgramExit(rc);
}
