/*!
   \file ep_send.hpp
   \since 2 may 2016

   \brief Definitions of MPI send functions: MPI_Send, MPI_Ssend, MPI_Isend, MPI_Issend
 */

#include "ep_lib.hpp"
#include <mpi.h>
#include "ep_declaration.hpp"
#include "ep_mpi.hpp"


namespace ep_lib 
{
  
  int MPI_Send(void *buf, int count, MPI_Datatype datatype, int dest, int tag, MPI_Comm comm)
  {
    if(!comm->is_ep)       return MPI_Send_mpi(buf, count, datatype, dest, tag, comm);
    if(comm->is_intercomm) return MPI_Send_intercomm(buf, count, datatype, dest, tag, comm);
    
    Debug("\nMPI_Send with EP\n");
    
    int ep_src_loc  = comm->ep_comm_ptr->size_rank_info[1].first;
    int ep_dest_loc = comm->ep_comm_ptr->comm_list[0]->ep_rank_map->at(dest).first;
    int mpi_tag     = tag_combine(tag, ep_src_loc, ep_dest_loc);
    int mpi_dest    = comm->ep_comm_ptr->comm_list[0]->ep_rank_map->at(dest).second;

#ifdef _check_sum    
    check_sum_send(buf, count, datatype, dest, tag, comm);
#endif

    return ::MPI_Send(buf, count, to_mpi_type(datatype), mpi_dest, mpi_tag, to_mpi_comm(comm->mpi_comm));
  }


  int MPI_Ssend(void *buf, int count, MPI_Datatype datatype, int dest, int tag, MPI_Comm comm)
  {
    if(!comm->is_ep)       return MPI_Ssend_mpi(buf, count, datatype, dest, tag, comm);
    if(comm->is_intercomm) return MPI_Ssend_intercomm(buf, count, datatype, dest, tag, comm);
    
    Debug("\nMPI_Ssend with EP\n");

    int ep_src_loc  = comm->ep_comm_ptr->size_rank_info[1].first;
    int ep_dest_loc = comm->ep_comm_ptr->comm_list[0]->ep_rank_map->at(dest).first;
    int mpi_tag     = tag_combine(tag, ep_src_loc, ep_dest_loc);
    int mpi_dest    = comm->ep_comm_ptr->comm_list[0]->ep_rank_map->at(dest).second;
    
#ifdef _check_sum    
    check_sum_send(buf, count, datatype, dest, tag, comm);
#endif
    
    return ::MPI_Ssend(buf, count, to_mpi_type(datatype), mpi_dest, mpi_tag, to_mpi_comm(comm->mpi_comm));
  }
  




  int MPI_Isend(const void *buf, int count, MPI_Datatype datatype, int dest, int tag, MPI_Comm comm, MPI_Request *request)
  {
    if(!comm->is_ep)       return MPI_Isend_mpi(buf, count, datatype, dest, tag, comm, request);
    if(comm->is_intercomm) return MPI_Isend_intercomm(buf, count, datatype, dest, tag, comm, request);

    Debug("\nMPI_Isend with EP\n");
   
    int src_rank;
    MPI_Comm_rank(comm, &src_rank);


#ifdef _check_sum    
    check_sum_send(buf, count, datatype, dest, tag, comm);
#endif
    
    *request = new ep_request;
    memcheck("new "<< *request <<" : in ep_lib::MPI_Isend, *request = new ep_request");

    (*request)->mpi_request = new ::MPI_Request;
    memcheck("new "<< (*request)->mpi_request <<" : in ep_lib::MPI_Isend, (*request)->mpi_request = new ::MPI_Request");
    

    int ep_src_loc  = comm->ep_comm_ptr->size_rank_info[1].first;
    int ep_dest_loc = comm->ep_comm_ptr->comm_list[0]->ep_rank_map->at(dest).first;
    int mpi_tag     = tag_combine(tag, ep_src_loc, ep_dest_loc);
    int mpi_dest    = comm->ep_comm_ptr->comm_list[0]->ep_rank_map->at(dest).second;

    (*request)->ep_src  = src_rank;
    (*request)->ep_tag  = tag;
    (*request)->ep_datatype = datatype;

    (*request)->type = 1;    // used in wait
    (*request)->comm = comm;
    (*request)->buf = const_cast<void*>(buf);


    return ::MPI_Isend(buf, count, to_mpi_type(datatype), mpi_dest, mpi_tag, to_mpi_comm(comm->mpi_comm), to_mpi_request_ptr(*request));
  }




  int MPI_Issend(const void *buf, int count, MPI_Datatype datatype, int dest, int tag, MPI_Comm comm, MPI_Request *request)
  {
 
    if(!comm->is_ep) return MPI_Issend_mpi(buf, count, datatype, dest, tag, comm, request);
    if(comm->is_intercomm) return MPI_Issend_intercomm(buf, count, datatype, dest, tag, comm, request);

    Debug("\nMPI_Issend with EP\n");
   
    int src_rank;
    MPI_Comm_rank(comm, &src_rank);


#ifdef _check_sum    
    check_sum_send(buf, count, datatype, dest, tag, comm);
#endif
    
    *request = new ep_request;
    memcheck("new "<< *request <<" : in ep_lib::MPI_Issend, *request = new ep_request");

    (*request)->mpi_request = new ::MPI_Request;
    memcheck("new "<< (*request)->mpi_request <<" : in ep_lib::MPI_Issend, (*request)->mpi_request = new ::MPI_Request");
    

    int ep_src_loc  = comm->ep_comm_ptr->size_rank_info[1].first;
    int ep_dest_loc = comm->ep_comm_ptr->comm_list[0]->ep_rank_map->at(dest).first;
    int mpi_tag     = tag_combine(tag, ep_src_loc, ep_dest_loc);
    int mpi_dest    = comm->ep_comm_ptr->comm_list[0]->ep_rank_map->at(dest).second;

    (*request)->ep_src  = src_rank;
    (*request)->ep_tag  = tag;
    (*request)->ep_datatype = datatype;

    (*request)->type = 1;    // used in wait
    (*request)->comm = comm;
    (*request)->buf = const_cast<void*>(buf);
    
    return ::MPI_Issend(buf, count, to_mpi_type(datatype), mpi_dest, mpi_tag, to_mpi_comm(comm->mpi_comm), to_mpi_request_ptr(*request));    
  }
  
  int MPI_Send_mpi(void *buf, int count, MPI_Datatype datatype, int dest, int tag, MPI_Comm comm)
  {
    Debug("\nMPI_Send with MPI\n");
    return ::MPI_Send(buf, count, to_mpi_type(datatype), dest, tag, to_mpi_comm(comm->mpi_comm));
  }
  
  int MPI_Send_intercomm(void *buf, int count, MPI_Datatype datatype, int dest, int tag, MPI_Comm comm)
  {
    Debug("\nMPI_Send_intercomm with EP\n");
    MPI_Request request;
    MPI_Status status;
    MPI_Isend(buf, count, datatype, dest, tag, comm, &request);
    MPI_Wait(&request, &status);
    return MPI_SUCCESS;
  }
  
  
  int MPI_Ssend_mpi(void *buf, int count, MPI_Datatype datatype, int dest, int tag, MPI_Comm comm)
  {
    Debug("\nMPI_Ssend with MPI\n");
    return ::MPI_Ssend(buf, count, to_mpi_type(datatype), dest, tag, to_mpi_comm(comm->mpi_comm));
  }
  

  int MPI_Ssend_intercomm(void *buf, int count, MPI_Datatype datatype, int dest, int tag, MPI_Comm comm)
  {
    Debug("\nMPI_Ssend_intercomm with EP\n");
    MPI_Request request;
    MPI_Status status;
    MPI_Issend(buf, count, datatype, dest, tag, comm, &request);
    MPI_Wait(&request, &status);
    return MPI_SUCCESS;
  }
  
  int MPI_Isend_mpi(const void *buf, int count, MPI_Datatype datatype, int dest, int tag, MPI_Comm comm, MPI_Request *request)
  {
    Debug("\nMPI_Isend with MPI\n");
    
    int src_rank;
    MPI_Comm_rank(comm, &src_rank);
    
    *request = new ep_request;
    memcheck("new "<< *request <<" : in ep_lib::MPI_Isend_mpi, *request = new ep_request");

    (*request)->mpi_request = new ::MPI_Request;
    memcheck("new "<< (*request)->mpi_request <<" : in ep_lib::MPI_Isend_mpi, (*request)->mpi_request = new ::MPI_Request");
      
    (*request)->ep_src = src_rank;
    (*request)->ep_tag = tag;
    (*request)->ep_datatype = datatype;
    (*request)->type = 1;
    (*request)->comm = comm;
    
    return ::MPI_Isend(buf, count, to_mpi_type(datatype), dest, tag, to_mpi_comm(comm->mpi_comm), to_mpi_request_ptr(*request));
  }
  
  int MPI_Isend_intercomm(const void *buf, int count, MPI_Datatype datatype, int dest, int tag, MPI_Comm comm, MPI_Request *request)
  {
    Debug("\nMPI_Isend_intercomm with EP\n");

#ifdef _check_sum    
    check_sum_send(buf, count, datatype, dest, tag, comm);
#endif

    int src_comm_label  = comm->ep_comm_ptr->comm_label;
    int dest_comm_label = comm->ep_comm_ptr->intercomm->intercomm_rank_map->at(dest).second.second;
    
    int src_rank;
    MPI_Comm_rank(comm, &src_rank);

    
    *request = new ep_request;
    memcheck("new "<< *request <<" : in ep_lib::MPI_Isend_intercomm, *request = new ep_request");

    (*request)->mpi_request = new ::MPI_Request;
    memcheck("new "<< (*request)->mpi_request <<" : in ep_lib::MPI_Isend_intercomm, (*request)->mpi_request = new ::MPI_Request");
    

    int ep_src_loc  = comm->ep_rank_map->at(src_rank).first;
    int ep_dest_loc = comm->ep_comm_ptr->intercomm->intercomm_rank_map->at(dest).first;
    int mpi_tag     = tag_combine(tag, ep_src_loc, ep_dest_loc);
    int mpi_dest    = comm->ep_comm_ptr->intercomm->intercomm_rank_map->at(dest).second.first;

#ifdef _showinfo
    printf("Send : ep_src_loc = %d, ep_dest_loc = %d, mpi_src = %d, mpi_dest = %d, mpi_tag = %d\n", ep_src_loc, ep_dest_loc, comm->ep_comm_ptr->size_rank_info[2].first, mpi_dest, mpi_tag);
#endif
    

    (*request)->ep_src  = src_rank;
    (*request)->ep_tag  = tag;
    (*request)->ep_datatype = datatype;

    (*request)->type = 1;    // used in wait
    (*request)->comm = comm;
    (*request)->buf = const_cast<void*>(buf);


    if(src_comm_label == dest_comm_label)
    {
      Debug("\nMPI_Isend_intercomm with EP_intracomm\n");
      return ::MPI_Isend(buf, count, to_mpi_type(datatype), mpi_dest, mpi_tag, to_mpi_comm(comm->mpi_comm), to_mpi_request_ptr(*request));
    }

    else
    {
      Debug("\nMPI_Isend_intercomm with EP_intercomm\n");
      return ::MPI_Isend(buf, count, to_mpi_type(datatype), mpi_dest, mpi_tag, to_mpi_comm(comm->ep_comm_ptr->intercomm->mpi_inter_comm), to_mpi_request_ptr(*request));
    }
  }




  int MPI_Issend_mpi(const void *buf, int count, MPI_Datatype datatype, int dest, int tag, MPI_Comm comm, MPI_Request *request)
  {
    Debug("\nMPI_Issend with MPI\n");
    
    int src_rank;
    MPI_Comm_rank(comm, &src_rank);
    
    *request = new ep_request;
    memcheck("new "<< *request <<" : in ep_lib::MPI_Issend_mpi, *request = new ep_request");

    (*request)->mpi_request = new ::MPI_Request;
    memcheck("new "<< (*request)->mpi_request <<" : in ep_lib::MPI_Issend_mpi, (*request)->mpi_request = new ::MPI_Request");
      
    (*request)->ep_src = src_rank;
    (*request)->ep_tag = tag;
    (*request)->ep_datatype = datatype;
    (*request)->type = 1;
    (*request)->comm = comm;
    
    return ::MPI_Issend(buf, count, to_mpi_type(datatype), dest, tag, to_mpi_comm(comm->mpi_comm), to_mpi_request_ptr(*request));
  }


  int MPI_Issend_intercomm(const void *buf, int count, MPI_Datatype datatype, int dest, int tag, MPI_Comm comm, MPI_Request *request)
  {
    Debug("\nMPI_Issend_intercomm with EP\n");

#ifdef _check_sum    
    check_sum_send(buf, count, datatype, dest, tag, comm);
#endif

    int src_comm_label  = comm->ep_comm_ptr->comm_label;
    int dest_comm_label = comm->ep_comm_ptr->intercomm->intercomm_rank_map->at(dest).second.second;
    
    int src_rank;
    MPI_Comm_rank(comm, &src_rank);

    
    *request = new ep_request;
    memcheck("new "<< *request <<" : in ep_lib::MPI_Issend_intercomm, *request = new ep_request");

    (*request)->mpi_request = new ::MPI_Request;
    memcheck("new "<< (*request)->mpi_request <<" : in ep_lib::MPI_Issend_intercomm, (*request)->mpi_request = new ::MPI_Request");
    

    int ep_src_loc  = comm->ep_rank_map->at(src_rank).first;
    int ep_dest_loc = comm->ep_comm_ptr->intercomm->intercomm_rank_map->at(dest).first;
    int mpi_tag     = tag_combine(tag, ep_src_loc, ep_dest_loc);
    int mpi_dest    = comm->ep_comm_ptr->intercomm->intercomm_rank_map->at(dest).second.first;

#ifdef _showinfo
    printf("ep_src_loc = %d, ep_dest_loc = %d, mpi_src = %d, mpi_dest = %d, mpi_tag = %d\n", ep_src_loc, ep_dest_loc, comm->ep_comm_ptr->size_rank_info[2].first, mpi_dest, mpi_tag);
#endif
    
    (*request)->ep_src  = src_rank;
    (*request)->ep_tag  = tag;
    (*request)->ep_datatype = datatype;

    (*request)->type = 1;    // used in wait
    (*request)->comm = comm;
    (*request)->buf = const_cast<void*>(buf);


    if(src_comm_label == dest_comm_label)
    {
      Debug("\nMPI_Issend_intercomm with EP_intracomm\n");
      return ::MPI_Issend(buf, count, to_mpi_type(datatype), mpi_dest, mpi_tag, to_mpi_comm(comm->mpi_comm), to_mpi_request_ptr(*request));
    }

    else
    {
      Debug("\nMPI_Issend_intercomm with EP_intercomm\n");
      return ::MPI_Issend(buf, count, to_mpi_type(datatype), mpi_dest, mpi_tag, to_mpi_comm(comm->ep_comm_ptr->intercomm->mpi_inter_comm), to_mpi_request_ptr(*request));
    }
  }
  
}