#include "xios_spl.hpp"
#include "cxios.hpp"
#include "client.hpp"
#include "server.hpp"
#include "xml_parser.hpp"
#include <boost/functional/hash.hpp>
#include "mpi.hpp"
#include "memory.hpp"
#include <new>
#include "memtrack.hpp"
#include "registry.hpp"

namespace xios
{
  string CXios::rootFile="./iodef.xml" ;
  string CXios::xiosCodeId="xios.x" ;
  string CXios::clientFile="./xios_client";
  string CXios::serverFile="./xios_server";

  bool CXios::isClient ;
  bool CXios::isServer ;
  MPI_Comm CXios::globalComm ;
  bool CXios::usingOasis ;
  bool CXios::usingServer = false;
  double CXios::bufferSizeFactor = 1.0;
  const double CXios::defaultBufferSizeFactor = 1.0;
  StdSize CXios::minBufferSize = 1024 * sizeof(double);
  bool CXios::printLogs2Files;
  bool CXios::isOptPerformance = true;
  CRegistry* CXios::globalRegistry = 0;

  //! Parse configuration file and create some objects from it
  void CXios::initialize()
  {    
    set_new_handler(noMemory);
    #pragma omp critical
    {
      parseFile(rootFile);  
    }
    parseXiosConfig();
  }

  /*!
  \brief Parse xios part of configuration file (.iodef.xml)
   Both client and server need information returned from this function
  */
  void CXios::parseXiosConfig()
  {

    usingOasis=getin<bool>("using_oasis",false) ;
    usingServer=getin<bool>("using_server",false) ;
    info.setLevel(getin<int>("info_level",0)) ;
    report.setLevel(getin<int>("info_level",50));
    printLogs2Files=getin<bool>("print_file",false);

    StdString bufMemory("memory");
    StdString bufPerformance("performance");
    StdString bufOpt = getin<StdString>("optimal_buffer_size", bufPerformance);
    std::transform(bufOpt.begin(), bufOpt.end(), bufOpt.begin(), ::tolower);
    if (0 == bufOpt.compare(bufMemory)) isOptPerformance = false;
    else if (0 != bufOpt.compare(bufPerformance))
    {
      ERROR("CXios::parseXiosConfig()", << "optimal_buffer_size must be memory or performance "<< endl );
    }

    bufferSizeFactor = getin<double>("buffer_size_factor", defaultBufferSizeFactor);
    minBufferSize = getin<int>("min_buffer_size", 1024 * sizeof(double));
 
    int num_ep;
    if(isClient)  
    { 
      num_ep = omp_get_num_threads();
      printf("Client %d: num_ep = %d\n", omp_get_thread_num(), num_ep);
    }
    
    if(isServer) 
    { 
      num_ep = omp_get_num_threads();
      printf("Server %d: num_ep = %d\n", omp_get_thread_num(), num_ep); 
    }
    
    MPI_Info info;
    #pragma omp master
    {
      MPI_Comm *ep_comm;
      MPI_Comm_create_endpoints(MPI_COMM_WORLD, num_ep, info, ep_comm);  // servers should reach here too.
      passage = ep_comm;  
    }
    
    #pragma omp barrier
      
    globalComm = passage[omp_get_thread_num()];

    int tmp_rank;
    MPI_Comm_rank(globalComm, &tmp_rank);
    if(isClient) printf("client thread %d/%d\n", omp_get_thread_num(), tmp_rank);
    if(isServer) printf("server thread %d/%d\n", omp_get_thread_num(), tmp_rank);
    
  }

  /*!
  Initialize client
  \param [in] codeId identity of context
  \param [in] localComm local communicator
  \param [in/out] returnComm communicator corresponding to group of client with same codeId
  */
  void CXios::initClientSide(const string& codeId, MPI_Comm& localComm, MPI_Comm& returnComm)
  {
    isClient = true;
    
    initialize() ;



    CClient::initialize(codeId,localComm,returnComm) ;


    if (CClient::getRank()==0) globalRegistry = new CRegistry(returnComm) ;

    // If there are no server processes then we are in attached mode
    // and the clients are also servers
    isServer = !usingServer;
    
    printf("CXios::initClientSide OK, printLogs2Files = %d\n", printLogs2Files);
    
    if (printLogs2Files)
    {
      CClient::openInfoStream(clientFile);
      CClient::openErrorStream(clientFile);
    }
    else
    {
      CClient::openInfoStream();
      CClient::openErrorStream();
    }
    
   
  }

  void CXios::clientFinalize(void)
  {
     CClient::finalize() ;
     if (CClient::getRank()==0)
     {
       info(80)<<"Write data base Registry"<<endl<<globalRegistry->toString()<<endl ;
       globalRegistry->toFile("xios_registry.bin") ;
       delete globalRegistry ;
     }
     CClient::closeInfoStream();
  

#ifdef XIOS_MEMTRACK
     MemTrack::TrackListMemoryUsage() ;
     MemTrack::TrackDumpBlocks();
#endif
  }

  //! Init server by parsing only xios part of config file
  void CXios::initServer()
  {
    int initialized;
    MPI_Initialized(&initialized);
    if (initialized) CServer::is_MPI_Initialized=true ;
    else CServer::is_MPI_Initialized=false ;
      
 
    if(!CServer::is_MPI_Initialized)
    {
      MPI_Init(NULL, NULL);
    }
      
    set_new_handler(noMemory);
    std::set<StdString> parseList;
    parseList.insert("xios");
    xml::CXMLParser::ParseFile(rootFile, parseList);
    parseXiosConfig();
  }

  //! Initialize server then put it into listening state
  void CXios::initServerSide(void)
  {
    
    isClient = false;
    isServer = true;
    
    initServer();
    
    
    // Initialize all aspects MPI
    CServer::initialize();
    
    if (CServer::getRank()==0) globalRegistry = new CRegistry(CServer::intraComm) ;
    
      
    if (printLogs2Files)
    {
      CServer::openInfoStream(serverFile);
      CServer::openErrorStream(serverFile);
    }
    else
    {
      CServer::openInfoStream();
      CServer::openErrorStream();
    }
    
    // Enter the loop to listen message from Client
    CServer::eventLoop();
    
    // Finalize
     if (CServer::getRank()==0)
     {
       info(80)<<"Write data base Registry"<<endl<<globalRegistry->toString()<<endl ;
       globalRegistry->toFile("xios_registry.bin") ;
       delete globalRegistry ;
     }
     
     
    CServer::finalize();
        
    CServer::closeInfoStream();
  }

  //! Parse configuration file
  void CXios::parseFile(const string& filename)
  {
    xml::CXMLParser::ParseFile(filename);
  }

  //! Set using server
  void CXios::setUsingServer()
  {
    usingServer = true;
  }

  //! Unset using server
  void CXios::setNotUsingServer()
  {
    usingServer = false;
  }
}