/*
----
This file is part of SECONDO.

Copyright (C) 2017,
Faculty of Mathematics and Computer Science,
Database Systems for New Applications.

SECONDO 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.

SECONDO 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 SECONDO; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
----

*/
#include "Algebras/Distributed2/Dist2Helper.h"

#include "Algebras/DBService2/DBServiceManager.hpp"
#include "Algebras/DBService2/DebugOutput.hpp"
#include "Algebras/DBService2/OperatorStartDBService.hpp"

#include <loguru.hpp>

using namespace std;

extern boost::recursive_mutex nlparsemtx;

namespace DBService
{

ListExpr OperatorStartDBService::mapType(ListExpr nestedList)
{
    LOG_SCOPE_FUNCTION(INFO);
    print(nestedList, std::cout);

    LOG_F(INFO, "%s", "Acquiring lock for nlparsemtx...");
    boost::lock_guard<boost::recursive_mutex> guard(nlparsemtx);
    LOG_F(INFO, "%s", "Successfully acquired lock for nlparsemtx...");

    if (!nl->HasLength(nestedList, 0))
    {
        ErrorReporter::ReportError(
                "expected signature: (empty signature)");
        return nl->TypeError();
    }

    return listutils::basicSymbol<CcBool>();
}

int OperatorStartDBService::mapValue(Word* args,
                               Word& result,
                               int message,
                               Word& local,
                               Supplier s)
{
    LOG_SCOPE_FUNCTION(INFO);
    result = qp->ResultStorage(s);
    CcBool* res = (CcBool*) result.addr;

    if( DBServiceManager::isActive()){
        res->Set(true,true);
        return 0;
    }

    // If invoked using a TTY, the TTY may create a transaction but we need
    // full control over transactions. So therefore we'll close any given 
    // transaction to ensure that no transaction is running.
    if(!SecondoSystem::CommitTransaction(true))
    {
        LOG_F(INFO, "%s", "There was no transaction running.");        
    }

    bool started = DBServiceManager::getInstance() != 0;

    LOG_F(INFO, "DBServiceManager instance available? %d", started);

    //TODO find out if there's a more elegant way...
    /* The test suite will commit many transactions but Secondo will attempt 
     * to close
     * the transaction for the given operator. Therefore, here a transaction 
     * will be opened
     * to satisfy this requirement for a successful operator execution.
     */

    
    LOG_F(INFO, "%s", "Starting transaction... ");
    

    SecondoSystem::BeginTransaction();
    // qp->switchTransaction(s);

    res->Set(true,started);
    return 0;
}

}