PROGRAM test_remap_omp

  USE xios
  USE mod_wait
  USE omp_lib
  USE netcdf

  IMPLICIT NONE
  INCLUDE "mpif.h"
  INTEGER :: rank
  INTEGER :: size
  INTEGER :: ierr

  CHARACTER(len=*),PARAMETER :: id="client"
  INTEGER :: comm
  TYPE(xios_duration) :: dtime
  TYPE(xios_context) :: ctx_hdl

  DOUBLE PRECISION,ALLOCATABLE :: src_lon(:), dst_lon(:), src_lon_tmp(:)
  DOUBLE PRECISION,ALLOCATABLE :: src_lat(:), dst_lat(:), src_lat_tmp(:)
  DOUBLE PRECISION,ALLOCATABLE :: src_boundslon(:,:), dst_boundslon(:,:)
  DOUBLE PRECISION,ALLOCATABLE :: src_boundslat(:,:), dst_boundslat(:,:)
  DOUBLE PRECISION,ALLOCATABLE :: src_field_2D(:), src_field_2D_clone(:)
  DOUBLE PRECISION,ALLOCATABLE :: tmp_field_0(:), tmp_field_1(:), tmp_field_2(:)
  DOUBLE PRECISION,ALLOCATABLE :: src_field_3D(:,:), src_field_4D(:,:,:), lval(:), lval1(:), lval2(:), src_field_pression(:,:)
  LOGICAL,ALLOCATABLE :: src_mask_2D(:)
  INTEGER :: src_ni_glo, dst_ni_glo;
  INTEGER :: src_nvertex, dst_nvertex;
  INTEGER :: src_ibegin, dst_ibegin;
  INTEGER :: src_ni, dst_ni;
  INTEGER :: src_tmp_ni, src_tmp_nj, src_tmp_n;
  CHARACTER(LEN=*),PARAMETER :: src_file="h14.nc"
  CHARACTER(LEN=*),PARAMETER :: dst_file="r180x90.nc"
  INTEGER :: ncid
  INTEGER :: dimids(2)
  INTEGER :: div,remain
  INTEGER :: varid
  INTEGER :: ts
  INTEGER :: i,j
  INTEGER,PARAMETER :: llm=5, interpolatedLlm = 4, llm2 = 6
  DOUBLE PRECISION, PARAMETER :: missing_value = 100000
  INTEGER :: provided

  CALL MPI_INIT_THREAD(3, provided, ierr)
    if(provided .NE. 3) then
      print*, "provided thread level = ", provided
      call MPI_Abort()
    endif
  CALL init_wait

  CALL MPI_COMM_RANK(MPI_COMM_WORLD,rank,ierr)
  CALL MPI_COMM_SIZE(MPI_COMM_WORLD,size,ierr)
  if(rank < size-2) then
 
  !$omp parallel default(firstprivate) 

!!! XIOS Initialization (get the local communicator)

  CALL xios_initialize(id,return_comm=comm)
  CALL MPI_COMM_RANK(comm,rank,ierr)
  CALL MPI_COMM_SIZE(comm,size,ierr)
  
  rank = rank*omp_get_num_threads() + omp_get_thread_num()
  size = size*omp_get_num_threads()

  print*, "rank = ", rank, " size = ", size

  !$omp critical (open_file)
  ierr=NF90_OPEN(src_file, NF90_NOWRITE, ncid)
  ierr=NF90_INQ_VARID(ncid,"bounds_lon",varid)
  ierr=NF90_INQUIRE_VARIABLE(ncid, varid,dimids=dimids)
  ierr=NF90_INQUIRE_DIMENSION(ncid, dimids(1), len=src_nvertex)
  ierr=NF90_INQUIRE_DIMENSION(ncid, dimids(2), len=src_ni_glo)

  div    = src_ni_glo/size
  remain = MOD( src_ni_glo, size )
  IF (rank < remain) THEN
    src_ni=div+1 ;
    src_ibegin=rank*(div+1) ;
  ELSE
    src_ni=div ;
    src_ibegin= remain * (div+1) + (rank-remain) * div ;
  ENDIF

  ALLOCATE(src_lon(src_ni), src_lon_tmp(src_ni))
  ALLOCATE(src_lat(src_ni), src_lat_tmp(src_ni))
  ALLOCATE(src_boundslon(src_nvertex,src_ni))
  ALLOCATE(src_boundslat(src_nvertex,src_ni))
  ALLOCATE(src_field_2D(src_ni), src_field_2D_clone(src_ni))
  ALLOCATE(src_field_3D(src_ni,llm))
  ALLOCATE(src_field_4D(src_ni,llm,llm2))
  ALLOCATE(src_mask_2D(src_ni))
  ALLOCATE(src_field_pression(src_ni,llm))
  ALLOCATE(lval(llm))
  ALLOCATE(lval1(interpolatedLlm))
  ALLOCATE(lval2(llm2))
  lval2 = 0
  lval=0
  lval1=0

  ierr=NF90_INQ_VARID(ncid,"lon",varid)
  ierr=NF90_GET_VAR(ncid,varid, src_lon, start=(/src_ibegin+1/),count=(/src_ni/))
  ierr=NF90_INQ_VARID(ncid,"lat",varid)
  ierr=NF90_GET_VAR(ncid,varid, src_lat, start=(/src_ibegin+1/),count=(/src_ni/))
  ierr=NF90_INQ_VARID(ncid,"bounds_lon",varid)
  ierr=NF90_GET_VAR(ncid,varid,src_boundslon, start=(/1,src_ibegin+1/),count=(/src_nvertex,src_ni/))
  ierr=NF90_INQ_VARID(ncid,"bounds_lat",varid)
  ierr=NF90_GET_VAR(ncid,varid, src_boundslat, start=(/1,src_ibegin+1/),count=(/src_nvertex,src_ni/))
  ierr=NF90_INQ_VARID(ncid,"val",varid)
  ierr=NF90_GET_VAR(ncid,varid, src_field_2D, start=(/src_ibegin+1/),count=(/src_ni/))
  DO i=1,src_ni
    src_field_3D(i,:) = src_field_2D(i)
    IF ((0 < src_lat(i)) .AND. (src_lat(i) < 25.5) .AND. (30 < src_lon(i)) .AND. (src_lon(i) < 60)) THEN
      src_mask_2D(i)=.FALSE.
      ! src_field_2D(i) = missing_value
    ELSE
      src_mask_2D(i)=.TRUE.      
    ENDIF
    src_lon_tmp(i) = src_lon(i) + 1000
    src_lat_tmp(i) = src_lat(i) + 10000
  ENDDO
  src_field_2D_clone = src_field_2D

  DO i=1,llm
    lval(i) = i*100
    src_field_pression(:,i) = i * 100
    IF (MOD(i,3)==0) THEN
      ! src_field_pression(:,i) = missing_value
      src_field_3D(:,i) = missing_value
    ELSE
      ! src_field_pression(:,i) = i * 100
      src_field_3D(:,i) = src_field_3D(:,i) + i * 10 
    ENDIF
    ! src_field_3D(:,i) = src_field_3D(:,i) + i * 10    
  ENDDO

  DO i=1,llm2
    src_field_4D(:,:,i) = src_field_3D(:,:) + i * 100
  ENDDO

  DO i=1,interpolatedLlm
    lval2(i) = i*10
    lval1(i) = i*10 + 2
  ENDDO

  print*, "ID = ", rank, "src_ni = ", "src_nvertex = ", src_nvertex, "src_ni_glo = ", src_ni_glo

  ierr=NF90_OPEN(dst_file, NF90_NOWRITE, ncid)
  ierr=NF90_INQ_VARID(ncid,"bounds_lon",varid)
  ierr=NF90_INQUIRE_VARIABLE(ncid, varid,dimids=dimids)
  ierr=NF90_INQUIRE_DIMENSION(ncid, dimids(1), len=dst_nvertex)
  ierr=NF90_INQUIRE_DIMENSION(ncid, dimids(2), len=dst_ni_glo)

  div    = dst_ni_glo/size
  remain = MOD( dst_ni_glo, size )
  IF (rank < remain) THEN
    dst_ni=div+1 ;
    dst_ibegin=rank*(div+1) ;
  ELSE
    dst_ni=div ;
    dst_ibegin= remain * (div+1) + (rank-remain) * div ;
  ENDIF

  ALLOCATE(dst_lon(dst_ni))
  ALLOCATE(dst_lat(dst_ni))
  ALLOCATE(dst_boundslon(dst_nvertex,dst_ni))
  ALLOCATE(dst_boundslat(dst_nvertex,dst_ni))

  ierr=NF90_INQ_VARID(ncid,"lon",varid)
  ierr=NF90_GET_VAR(ncid,varid, dst_lon, start=(/dst_ibegin+1/),count=(/dst_ni/))
  ierr=NF90_INQ_VARID(ncid,"lat",varid)
  ierr=NF90_GET_VAR(ncid,varid, dst_lat, start=(/dst_ibegin+1/),count=(/dst_ni/))
  ierr=NF90_INQ_VARID(ncid,"bounds_lon",varid)
  ierr=NF90_GET_VAR(ncid,varid,dst_boundslon, start=(/1,dst_ibegin+1/),count=(/dst_nvertex,dst_ni/))
  ierr=NF90_INQ_VARID(ncid,"bounds_lat",varid)
  ierr=NF90_GET_VAR(ncid,varid, dst_boundslat, start=(/1,dst_ibegin+1/),count=(/dst_nvertex,dst_ni/))
  
  !$omp end critical (open_file)
  
  !$omp barrier

  !$omp master 
  CALL MPI_barrier(comm, ierr)
  !$omp end master

  !$omp barrier

  CALL xios_context_initialize("test",comm)
  CALL xios_get_handle("test",ctx_hdl)
  CALL xios_set_current_context(ctx_hdl)

  CALL xios_set_domain_attr("src_domain", ni_glo=src_ni_glo, ibegin=src_ibegin, ni=src_ni, type="unstructured")
  CALL xios_set_domain_attr("src_domain", lonvalue_1D=src_lon, latvalue_1D=src_lat, &
                            bounds_lon_1D=src_boundslon, bounds_lat_1D=src_boundslat, nvertex=src_nvertex)

  CALL xios_set_domain_attr("src_domain_clone", ni_glo=src_ni_glo, ibegin=src_ibegin, ni=src_ni, type="unstructured")
  CALL xios_set_domain_attr("src_domain_clone", lonvalue_1D=src_lon, latvalue_1D=src_lat, &
                            bounds_lon_1D=src_boundslon, bounds_lat_1D=src_boundslat, nvertex=src_nvertex, &
                            mask_1d=src_mask_2D)

  CALL xios_set_axis_attr("src_axis", n_glo=llm, value=lval)
  CALL xios_set_axis_attr("nq", n_glo=llm2, value=lval2)

  CALL xios_set_domain_attr("dst_domain", ni_glo=dst_ni_glo, ibegin=dst_ibegin, ni=dst_ni, type="unstructured")
  CALL xios_set_domain_attr("dst_domain", lonvalue_1D=dst_lon, latvalue_1D=dst_lat, &
                            bounds_lon_1D=dst_boundslon, bounds_lat_1D=dst_boundslat, nvertex=dst_nvertex)

  !CALL xios_set_domain_attr("src_domain_unstructured_read", ni_glo=src_ni_glo, ibegin=src_ibegin, ni=src_ni, type="unstructured")
  !CALL xios_set_domain_attr("src_domain_unstructured_read", lonvalue_1D=src_lon_tmp, latvalue_1D=src_lat_tmp, &
  !                          bounds_lon_1D=src_boundslon, bounds_lat_1D=src_boundslat, nvertex=src_nvertex)


  dtime%second = 3600
  CALL xios_set_timestep(dtime)

  CALL xios_close_context_definition()
  print *, "xios_close_context_definition OK "
  
  CALL xios_get_domain_attr("src_domain_regular_read", ni=src_tmp_ni, nj=src_tmp_nj)
  ALLOCATE(tmp_field_0(src_tmp_ni*src_tmp_nj))

  !CALL xios_get_axis_attr("src_axis_curvilinear_read", n=src_tmp_n)
  !CALL xios_get_domain_attr("src_domain_curvilinear_read", ni=src_tmp_ni, nj=src_tmp_nj)
  !ALLOCATE(tmp_field_1(src_tmp_ni*src_tmp_nj*src_tmp_n))

  !CALL xios_get_domain_attr("src_domain_unstructured_read", ni=src_tmp_ni, nj=src_tmp_nj)
  !ALLOCATE(tmp_field_2(src_tmp_ni*src_tmp_nj))
  
  DO ts=1,1
    CALL xios_recv_field("src_field_regular", tmp_field_0)
    !CALL xios_recv_field("src_field_curvilinear", tmp_field_1)
    !CALL xios_recv_field("src_field_unstructured", tmp_field_2)
    CALL xios_recv_field("src_field_regular", tmp_field_0)
    !CALL xios_recv_field("src_field_curvilinear", tmp_field_1)
    !CALL xios_recv_field("src_field_unstructured", tmp_field_2)
    CALL xios_update_calendar(ts)
    
    !DO i=1,src_ni
    !  src_field_2D_clone(i) = src_field_2D(i)
    !  IF ((23.5 * ts < src_lat(i)) .AND. (src_lat(i) < 65.5 *ts) .AND. (0 < src_lon(i)) .AND. (src_lon(i) < 30*ts)) THEN      
    !    src_field_2D_clone(i) = missing_value    
    !  ENDIF
    !ENDDO

    CALL xios_send_field("src_field_2D",src_field_2D)
    CALL xios_send_field("src_field_2D_clone",src_field_2D)
    CALL xios_send_field("src_field_3D",src_field_3D)
    !CALL xios_send_field("src_field_4D",src_field_4D)
    !CALL xios_send_field("src_field_3D_pression",src_field_pression)
    CALL xios_send_field("tmp_field_0",tmp_field_0)
    !CALL xios_send_field("tmp_field_1",tmp_field_1)
    !CALL xios_send_field("tmp_field_2",tmp_field_2)
    CALL wait_us(5000) ;
   ENDDO

  CALL xios_context_finalize()

  DEALLOCATE(src_lon, src_lat, src_boundslon,src_boundslat, src_field_2D)
  DEALLOCATE(dst_lon, dst_lat, dst_boundslon,dst_boundslat)
  DEALLOCATE(tmp_field_0)
  !DEALLOCATE(tmp_field_1)
  !DEALLOCATE(tmp_field_2)
  
  CALL xios_finalize()
  
  print *, "Client : xios_finalize ", rank

  !$omp barrier

  !$omp master 
  CALL MPI_COMM_FREE(comm, ierr)
  !$omp end master

  !$omp barrier

  !$omp end parallel
  else

    CALL xios_init_server
    print *, "Server : xios_finalize ", rank
  
  endif

  

  CALL MPI_FINALIZE(ierr)

END PROGRAM test_remap_omp