/* Copyright (C) 2003 MySQL AB

   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; either version 2 of the License, or
   (at your option) any later version.

   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

#include "Bank.hpp"
#include <UtilTransactions.hpp>

/**
 * Default account types
 *
 */
struct AccountTypesStruct {
  int id;
  const char* descr;
};
const AccountTypesStruct accountTypes[] = {
  { 0, "KASSA"},
  { 1, "BANKOMAT"},
  { 2, "POSTGIRO"},
  { 3, "LÖNEKONTO"},
  { 4, "SPARKONTO"}
};

const int
accountTypesSize = sizeof(accountTypes)/sizeof(AccountTypesStruct);


const char*  tableNames[] = {
  "GL",
  "ACCOUNT", 
  "SYSTEM_VALUES",
  "TRANSACTION",
  "ACCOUNT_TYPE"
};

const int
tableNamesSize = sizeof(tableNames)/sizeof(const char*);


int Bank::getNumAccountTypes(){
  return accountTypesSize;
}

int Bank::createAndLoadBank(bool ovrWrt, int num_accounts){

  m_ndb.init();   
  if (m_ndb.waitUntilReady() != 0)
    return NDBT_FAILED;
  
  const NdbDictionary::Table* pSysValTab = 
    m_ndb.getDictionary()->getTable("SYSTEM_VALUES");
  if (pSysValTab != NULL){
    // The table exists
    if (ovrWrt == false){
      ndbout << "Bank already exist and overwrite == false" << endl;
      return NDBT_FAILED;
    }
  }
  
  if (createTables() != NDBT_OK)
    return NDBT_FAILED;
  
  if (clearTables() != NDBT_OK)
    return NDBT_FAILED;
  
  if (loadAccountType() != NDBT_OK)
    return NDBT_FAILED;
  
  if (loadAccount(num_accounts) != NDBT_OK)
    return NDBT_FAILED;
    
  if (loadSystemValues() != NDBT_OK)
    return NDBT_FAILED;

  if (loadGl() != NDBT_OK)
    return NDBT_FAILED;
  
  return NDBT_OK;

}

int Bank::dropBank(){

  m_ndb.init();   
  if (m_ndb.waitUntilReady() != 0)
    return NDBT_FAILED;

  if (dropTables() != NDBT_OK)
    return NDBT_FAILED;
  
  return NDBT_OK;

}

int Bank::createTables(){
  for (int i = 0; i < tableNamesSize; i++){
    if (createTable(tableNames[i]) != NDBT_OK)
      return NDBT_FAILED;
  }
  return NDBT_OK;
}


int Bank::dropTables(){
  for (int i = 0; i < tableNamesSize; i++){
    if (dropTable(tableNames[i]) != NDBT_OK)
      return NDBT_FAILED;
  }
  return NDBT_OK;
}

int Bank::clearTables(){
  for (int i = 0; i < tableNamesSize; i++){
    if (clearTable(tableNames[i]) != NDBT_OK)
      return NDBT_FAILED;
  }
  return NDBT_OK;
}
   
int Bank::clearTable(const char* tabName){ 
  UtilTransactions util(&m_ndb, tabName);
  if(util.clearTable(&m_ndb, 64) != 0)
    return NDBT_FAILED;
  return NDBT_OK;
}

int Bank::createTable(const char* tabName){    
  ndbout << "createTable " << tabName << endl;

  const NdbDictionary::Table* pTab = NDBT_Tables::getTable(tabName);
  if (pTab == NULL)
    return NDBT_FAILED;
  
  const NdbDictionary::Table* org = 
    m_ndb.getDictionary()->getTable(tabName);
  
  if (org != 0 && pTab->equal(* org)){
    return NDBT_OK;
  }
  
  if (org != 0){
    ndbout << "Different table with same name exists" << endl;
    return NDBT_FAILED;
  }
 
  if(m_ndb.getDictionary()->createTable(* pTab) == -1){
    ndbout << "Failed to create table: " <<
      m_ndb.getNdbError() << endl;
    return NDBT_FAILED;
  }

  return NDBT_OK;    
}

int Bank::dropTable(const char* tabName){    
  const NdbDictionary::Table* org = 
    m_ndb.getDictionary()->getTable(tabName);
  
  if (org == NULL)
    return NDBT_OK;
  
  ndbout << "dropTable " <<tabName<<endl;
  if (m_ndb.getDictionary()->dropTable(tabName)  != 0){
    return NDBT_FAILED;
  }
  
  return NDBT_OK;    
}








/**
 * Load SYSTEM_VALUES table
 *  This table keeps track of system wide settings
 *  For example:
 *   - next transaction id
 *
 */
int Bank::loadSystemValues (){
int result;

/**
 * Insert start value for next transaction id
 *
 */
result = writeSystemValue(LastTransactionId, 0);

/**
 * Insert start value for current time
 *
 */
result = writeSystemValue(CurrentTime, 1);

return result;

}


/**
 * Load GL table
 * 
 * Insert GL records for time = 0 with balance 0
 */
int Bank::loadGl(){
  g_info << "loadGl" << endl;
  int check;
    
  NdbConnection* pTrans = m_ndb.startTransaction();
  if (pTrans == NULL){
    ERR(m_ndb.getNdbError());
    return NDBT_FAILED;
  }
    
  for (int i = 0; i < getNumAccountTypes(); i++){
      
    NdbOperation* pOp = pTrans->getNdbOperation("GL");
    if (pOp == NULL) {
      ERR(pTrans->getNdbError());
      m_ndb.closeTransaction(pTrans);
      return NDBT_FAILED;
    }
    
    check = pOp->insertTuple();
    if( check == -1 ) {
      ERR(pTrans->getNdbError());
      m_ndb.closeTransaction(pTrans);
      return NDBT_FAILED;
    }

    Uint64 time = 0;
    check = pOp->equal("TIME", time);
    if( check == -1 ) {
      ERR(pTrans->getNdbError());
      m_ndb.closeTransaction(pTrans);
      return NDBT_FAILED;
    }
      
    check = pOp->equal("ACCOUNT_TYPE", i);
    if( check == -1 ) {
      ERR(pTrans->getNdbError());
      m_ndb.closeTransaction(pTrans);
      return NDBT_FAILED;
    }

    Uint32 balance = 0;
    if (getBalanceForAccountType(i, balance) != NDBT_OK){
      return NDBT_FAILED;
    }

    check = pOp->setValue("BALANCE", balance);
    if( check == -1 ) {
      ERR(pTrans->getNdbError());
      m_ndb.closeTransaction(pTrans);
      return NDBT_FAILED;
    }
      
    Uint32 depositCount = 0;
    check = pOp->setValue("DEPOSIT_COUNT", depositCount);
    if( check == -1 ) {
      ERR(pTrans->getNdbError());
      m_ndb.closeTransaction(pTrans);
      return NDBT_FAILED;
    }
      
    Uint32 depositSum = 0;
    check = pOp->setValue("DEPOSIT_SUM", depositSum);
    if( check == -1 ) {
      ERR(pTrans->getNdbError());
      m_ndb.closeTransaction(pTrans);
      return NDBT_FAILED;
    }
      
    Uint32 withdrawalCount = 0;
    check = pOp->setValue("WITHDRAWAL_COUNT", withdrawalCount);
    if( check == -1 ) {
      ERR(pTrans->getNdbError());
      m_ndb.closeTransaction(pTrans);
      return NDBT_FAILED;
    }
      
    Uint32 withdrawalSum = 0;
    check = pOp->setValue("WITHDRAWAL_SUM", withdrawalSum);
    if( check == -1 ) {
      ERR(pTrans->getNdbError());
      m_ndb.closeTransaction(pTrans);
      return NDBT_FAILED;
    }
      
    Uint32 purged = 1;
    check = pOp->setValue("PURGED", purged);
    if( check == -1 ) {
      ERR(pTrans->getNdbError());
      m_ndb.closeTransaction(pTrans);
      return NDBT_FAILED;
    }
      
  }
  check = pTrans->execute(Commit);
  if( check == -1 ) {
    ERR(pTrans->getNdbError());
    m_ndb.closeTransaction(pTrans);
    return NDBT_FAILED;
  }
    
  m_ndb.closeTransaction(pTrans);      
  return NDBT_OK;
}; 


int Bank::getBalanceForAccountType(const Uint32 accountType,
				   Uint32& balance){
  int check;
  g_info << "getBalanceForAccountType: accountType="<<accountType<<endl;
    
  NdbConnection* pScanTrans = m_ndb.startTransaction();
  if (pScanTrans == NULL) {
    ERR(m_ndb.getNdbError());
    return NDBT_FAILED;
  }
      
  NdbScanOperation* pOp = pScanTrans->getNdbScanOperation("ACCOUNT");	
  if (pOp == NULL) {
    ERR(pScanTrans->getNdbError());
    m_ndb.closeTransaction(pScanTrans);
    return NDBT_FAILED;
  }

  NdbResultSet* rs = pOp->readTuples();
  if( rs == 0 ) {
    ERR(pScanTrans->getNdbError());
    m_ndb.closeTransaction(pScanTrans);
    return NDBT_FAILED;
  }

  check = pOp->interpret_exit_ok();
  if( check == -1 ) {
    ERR(pScanTrans->getNdbError());
    m_ndb.closeTransaction(pScanTrans);
    return NDBT_FAILED;
  }

  NdbRecAttr* accountTypeRec = pOp->getValue("ACCOUNT_TYPE");
  if( accountTypeRec ==NULL ) {
    ERR(pScanTrans->getNdbError());
    m_ndb.closeTransaction(pScanTrans);
    return NDBT_FAILED;
  }

  NdbRecAttr* balanceRec = pOp->getValue("BALANCE");
  if( balanceRec ==NULL ) {
    ERR(pScanTrans->getNdbError());
    m_ndb.closeTransaction(pScanTrans);
    return NDBT_FAILED;
  }

  check = pScanTrans->execute(NoCommit);
  if( check == -1 ) {
    ERR(pScanTrans->getNdbError());
    m_ndb.closeTransaction(pScanTrans);
    return NDBT_FAILED;
  }
    
  int eof;
  int rows = 0;
  eof = rs->nextResult();
    
  while(eof == 0){
    rows++;
    Uint32 a = accountTypeRec->u_32_value();
    Uint32 b = balanceRec->u_32_value();

    if (a == accountType){
      // One record found
      balance += b;
    }
		
    eof = rs->nextResult();
  }
  if (eof == -1) {
    ERR(pScanTrans->getNdbError());
    m_ndb.closeTransaction(pScanTrans);
    return NDBT_FAILED;
  }
    
  m_ndb.closeTransaction(pScanTrans);
  // ndbout << rows << " rows have been read" << endl;

  return NDBT_OK;

}
  
/**
 * Load ACCOUNT_TYPE table
 * 
 *
 */
int Bank::loadAccountType(){
  g_info << "loadAccountType" << endl;
  int check;
    
  NdbConnection* pTrans = m_ndb.startTransaction();
  if (pTrans == NULL){
    ERR(m_ndb.getNdbError());
    return NDBT_FAILED;
  }
    
  for (int i = 0; i < getNumAccountTypes(); i++){
      
    NdbOperation* pOp = pTrans->getNdbOperation("ACCOUNT_TYPE");
    if (pOp == NULL) {
      ERR(pTrans->getNdbError());
      m_ndb.closeTransaction(pTrans);
      return NDBT_FAILED;
    }
    
    check = pOp->insertTuple();
    if( check == -1 ) {
      ERR(pTrans->getNdbError());
      m_ndb.closeTransaction(pTrans);
      return NDBT_FAILED;
    }
      
    check = pOp->equal("ACCOUNT_TYPE_ID", accountTypes[i].id);
    if( check == -1 ) {
      ERR(pTrans->getNdbError());
      m_ndb.closeTransaction(pTrans);
      return NDBT_FAILED;
    }

    check = pOp->setValue("DESCRIPTION", accountTypes[i].descr);
    if( check == -1 ) {
      ERR(pTrans->getNdbError());
      m_ndb.closeTransaction(pTrans);
      return NDBT_FAILED;
    }
  }
  check = pTrans->execute(Commit);
  if( check == -1 ) {
    ERR(pTrans->getNdbError());
    m_ndb.closeTransaction(pTrans);
    return NDBT_FAILED;
  }
    
  m_ndb.closeTransaction(pTrans);      
  return NDBT_OK;
};
  
/**
 * Load ACCOUNT table
 * 
 *  
 *
 */
int Bank::loadAccount (int numAccounts){
  g_info << "loadAccount" << endl;
  int check;
    
  NdbConnection* pTrans = m_ndb.startTransaction();
  if (pTrans == NULL){
    ERR(m_ndb.getNdbError());
    return NDBT_FAILED;
  }
    
  for (int i = 0; i < numAccounts; i++){
      
    NdbOperation* pOp = pTrans->getNdbOperation("ACCOUNT");
    if (pOp == NULL) {
      ERR(pTrans->getNdbError());
      m_ndb.closeTransaction(pTrans);
      return NDBT_FAILED;
    }
    
    check = pOp->insertTuple();
    if( check == -1 ) {
      ERR(pTrans->getNdbError());
      m_ndb.closeTransaction(pTrans);
      return NDBT_FAILED;
    }
      
    check = pOp->equal("ACCOUNT_ID", i);
    if( check == -1 ) {
      ERR(pTrans->getNdbError());
      m_ndb.closeTransaction(pTrans);
      return NDBT_FAILED;
    }

    int owner;
    if (i == 0)
      owner = 0;
    else
      owner = i + 3000;
    check = pOp->setValue("OWNER", owner);
    if( check == -1 ) {
      ERR(pTrans->getNdbError());
      m_ndb.closeTransaction(pTrans);
      return NDBT_FAILED;
    }

    // Load balance so that the bank's account = 0 has 10 millions
    // and all other accounts have 10000
    // This set the total balance for the entire bank to 
    // 10000000 + (10000 * numAccounts-1)
    // Since no money should dissapear from to the bank nor
    // any money should be added this is a rule that can be checked when 
    // validating the db
    int balance;
    if (i == 0){
      balance = 10000000;
    } else {
      balance = 10000;
    }
    check = pOp->setValue("BALANCE", balance);
    if( check == -1 ) {
      ERR(pTrans->getNdbError());
      m_ndb.closeTransaction(pTrans);
      return NDBT_FAILED;
    }

    // TODO - This is how to set a value in a 16, 1 attribute, not so nice?
    // NOTE - its not even possible to set the value 0 in this column
    // since that is equal to NULL when casting to char*
    // check = pOp->setValue("ACCOUNT_TYPE", (const char*)(Uint16)(i/accountTypesSize), 2);
    // NOTE attribute now changed to be a 32 bit

      
    int accountType;
    if (i == 0)
      accountType = 0; // KASSA
    else
      accountType = ((i%accountTypesSize) == 0 ?  1 : (i%getNumAccountTypes()));
    check = pOp->setValue("ACCOUNT_TYPE", accountType);
    if( check == -1 ) {
      ERR(pTrans->getNdbError());
      m_ndb.closeTransaction(pTrans);
      return NDBT_FAILED;
    }
  }
  check = pTrans->execute(Commit);
  if( check == -1 ) {
    ERR(pTrans->getNdbError());
    m_ndb.closeTransaction(pTrans);
    return NDBT_FAILED;
  }
    
  m_ndb.closeTransaction(pTrans);      
  return NDBT_OK;
}


int Bank::getNumAccounts(){
  const NdbDictionary::Table* accountTab = 
    m_ndb.getDictionary()->getTable("ACCOUNT");
  if (accountTab == NULL){
    g_err << "Table ACCOUNT does not exist" << endl;
    return NDBT_FAILED;
  }
  UtilTransactions util(*accountTab);
  if(util.selectCount(&m_ndb, 64, &m_maxAccount) != 0)
    return NDBT_FAILED;    
  return NDBT_OK;
}

int Bank::getMaxAmount(){
  return 10000;
}
