! File: psb_descprt.f90
!
! Subroutine: psb_descprt
!    Prints the descriptor to an output file
! 
! Parameters: 
!    iout          - integer.                The output unit to print to.
!    desc_p        - type(<psb_desc_type>).  The communication descriptor to be printed.
!    glob          - logical(otpional).      Wheter to print out global or local data.
!    short         - logical(optional).      Used to choose a verbose output.
subroutine psb_descprt(iout,desc_p,glob,short)
  use psb_const_mod
  use psb_descriptor_type
  implicit none 
  type(psb_desc_type), intent(in)    :: desc_p
  integer, intent(in)                :: iout
  logical, intent(in), optional      :: glob,short
  logical :: lshort, lglob

  integer :: m, n_row, n_col,counter,idx,n_elem_recv,n_elem_send,&
       & proc,i

  if (present(glob)) then 
    lglob = glob
  else
    lglob = .false.
  endif
  if (present(short)) then 
    lshort = short
  else
    lshort = .true.
  endif

  if (.not.lglob) then
    write(iout,*) 'Precond. descriptor:',desc_p%matrix_data(1:10)
    m=desc_p%matrix_data(psb_m_)
    n_row=desc_p%matrix_data(psb_n_row_)
    n_col=desc_p%matrix_data(psb_n_col_)
    if (.not.lshort) &
         & write(iout,*) 'Loc_to_glob ',desc_p%loc_to_glob(1:n_row), ': ',&
         & desc_p%loc_to_glob(n_row+1:n_col)

    if (.not.lshort) write(iout,*) 'glob_to_loc ',desc_p%glob_to_loc(1:m)
    write(iout,*) 'Halo_index'
    counter      = 1
    Do
      proc=desc_p%halo_index(counter+psb_proc_id_)
      if (proc == -1) exit
      n_elem_recv=desc_p%halo_index(counter+psb_n_elem_recv_)
      n_elem_send=desc_p%halo_index(counter+n_elem_recv+psb_n_elem_send_)
      write(iout,*) 'Halo_index Receive',proc,n_elem_recv
      if (.not.lshort) write(iout,*) &
           & desc_p%halo_index(counter+psb_n_elem_recv_+1:counter+psb_n_elem_recv_+n_elem_recv)
      write(iout,*) 'Halo_index Send',proc,n_elem_send
      if (.not.lshort) write(iout,*) &
           & desc_p%halo_index(counter+n_elem_recv+psb_n_elem_send_+1: &
           &                   counter+n_elem_recv+psb_n_elem_send_+n_elem_send)

      counter   = counter+n_elem_recv+n_elem_send+3
    enddo


    write(iout,*) 'Ovrlap_index'
    counter      = 1
    Do
      proc=desc_p%ovrlap_index(counter+psb_proc_id_)
      if (proc == -1) exit
      n_elem_recv=desc_p%ovrlap_index(counter+psb_n_elem_recv_)
      n_elem_send=desc_p%ovrlap_index(counter+n_elem_recv+psb_n_elem_send_)
      write(iout,*) 'Ovrlap_index Receive',proc,n_elem_recv
      if (.not.lshort) write(iout,*) &
           & desc_p%ovrlap_index(counter+psb_n_elem_recv_+1:&
           &    counter+psb_n_elem_recv_+n_elem_recv)
      write(iout,*) 'Ovrlap_index Send',proc,n_elem_send
      if (.not.lshort) write(iout,*) &
           & desc_p%ovrlap_index(counter+n_elem_recv+psb_n_elem_send_+1: &
           &                   counter+n_elem_recv+psb_n_elem_send_+n_elem_send)

      counter   = counter+n_elem_recv+n_elem_send+3
    enddo

    write(iout,*) 'Ovrlap_elem'
    counter      = 1
    Do
      idx=desc_p%ovrlap_elem(counter)
      if (idx == -1) exit
      n_elem_recv=desc_p%ovrlap_elem(counter+1)
      if (.not.lshort) write(iout,*) idx,n_elem_Recv
      counter   = counter+2
    enddo

  else if (lglob) then 

    write(iout,*) 'Precond. descriptor:',desc_p%matrix_data(1:10)
    m=desc_p%matrix_data(psb_m_)
    n_row=desc_p%matrix_data(psb_n_row_)
    n_col=desc_p%matrix_data(psb_n_col_)
    if (.not.lshort) then 
      write(iout,*) 'Loc_to_glob '
      do i=1, n_row
        write(iout,*) i, desc_p%loc_to_glob(i)
      enddo
      write(iout,*) '........'
      do i=n_row+1,n_col
        write(iout,*) i, desc_p%loc_to_glob(i)
      enddo

      write(iout,*) 'glob_to_loc '
      do i=1,m
        write(iout,*) i,desc_p%glob_to_loc(i)
      enddo
    endif
    write(iout,*) 'Halo_index'
    counter      = 1
    Do
      proc=desc_p%halo_index(counter+psb_proc_id_)
      if (proc == -1) exit
      n_elem_recv=desc_p%halo_index(counter+psb_n_elem_recv_)
      n_elem_send=desc_p%halo_index(counter+n_elem_recv+psb_n_elem_send_)
      write(iout,*) 'Halo_index Receive',proc,n_elem_recv
      if (.not.lshort) then 
        do i=counter+psb_n_elem_recv_+1,counter+psb_n_elem_recv_+n_elem_recv
          write(iout,*) &
               & desc_p%loc_to_glob(desc_p%halo_index(i)),desc_p%halo_index(i)
        enddo
      endif
      write(iout,*) 'Halo_index Send',proc,n_elem_send
      if (.not.lshort) then 
        do i=counter+n_elem_recv+psb_n_elem_send_+1, &
             & counter+n_elem_recv+psb_n_elem_send_+n_elem_send
          write(iout,*) &
               & desc_p%loc_to_glob(desc_p%halo_index(i)),  desc_p%halo_index(i)
        enddo
      endif
      counter   = counter+n_elem_recv+n_elem_send+3
    enddo


    write(iout,*) 'Ovrlap_index'
    counter      = 1
    Do
      proc=desc_p%ovrlap_index(counter+psb_proc_id_)
      if (proc == -1) exit
      n_elem_recv=desc_p%ovrlap_index(counter+psb_n_elem_recv_)
      n_elem_send=desc_p%ovrlap_index(counter+n_elem_recv+psb_n_elem_send_)
      write(iout,*) 'Ovrlap_index Receive',proc,n_elem_recv
      if (.not.lshort) then 
        do i=counter+psb_n_elem_recv_+1,counter+psb_n_elem_recv_+n_elem_recv
          write(iout,*) desc_p%loc_to_glob(desc_p%ovrlap_index(i)),&
               & desc_p%ovrlap_index(i)
        enddo
      endif
      write(iout,*) 'Ovrlap_index Send',proc,n_elem_send
      if (.not.lshort) then 
        do i=counter+n_elem_recv+psb_n_elem_send_+1, &
             &                   counter+n_elem_recv+psb_n_elem_send_+n_elem_send
          write(iout,*) desc_p%loc_to_glob(desc_p%ovrlap_index(i)),&
               &   desc_p%ovrlap_index(i)
        enddo
      endif
      counter   = counter+n_elem_recv+n_elem_send+3
    enddo

    write(iout,*) 'Ovrlap_elem'
    counter      = 1
    if (.not.lshort) then 
      Do
        idx=desc_p%ovrlap_elem(counter)
        if (idx == -1) exit
        n_elem_recv=desc_p%ovrlap_elem(counter+1)
        write(iout,*) desc_p%loc_to_glob(idx),idx,n_elem_Recv
        counter   = counter+2
      enddo
    endif
  end if
end subroutine psb_descprt