#include "w3macros.h"
!/ ------------------------------------------------------------------- /
      PROGRAM W3MLTI
!/
!/                  +-----------------------------------+
!/                  | WAVEWATCH III           NOAA/NCEP |
!/                  |           H. L. Tolman            |
!/                  |                        FORTRAN 90 |
!/                  | Last update :         29-May-2009 |
!/                  +-----------------------------------+
!/
!/    04-May-2005 : Origination.                        ( version 3.07 )
!/    29-May-2009 : Preparing distribution version.     ( version 3.14 )
!/    17-Feb-2016 : New version from namelist use       ( version 5.11 )
!/
!/    Copyright 2009 National Weather Service (NWS),
!/       National Oceanic and Atmospheric Administration.  All rights
!/       reserved.  WAVEWATCH III is a trademark of the NWS. 
!/       No unauthorized use without permission.
!/
!  1. Purpose :
!
!     Program shell or driver to run the multi-grid wave model
!     (uncoupled).
!
!  2. Method :
!
!  3. Parameters :
!
!     Local parameters.
!     ----------------------------------------------------------------
!     ----------------------------------------------------------------
!
!  4. Subroutines used :
!
!      Name      Type  Module   Description
!     ----------------------------------------------------------------
!      WMINIT    Subr. WMINITMD Multi-grid model initialization.
!      WMFINL    Subr. WMFINLMD Multi-grid model finalization.
!
!      MPI_INIT, MPI_COMM_SIZE, MPI_COMM_RANK, MPI_BARRIER,
!         MPI_FINALIZE
!                Subr.          Standard MPI routines.
!     ----------------------------------------------------------------
!
!  5. Called by :
!
!     None, stand-alone program.
!
!  6. Error messages :
!
!  7. Remarks :
!
!     - This is he third version, version 1 and 2 were use for proof
!       of concept only, and were not retained.
!
!  8. Structure :
!
!     ----------------------------------------------------------------
!      0.  Initialization necessary for driver
!        a General I/O: (implicit in wmmdatmd)
!        b MPI environment
!        c Identifying output to "screen" unit
!      1.  Initialization of all wave models / grids       ( WMINIT )
!      2.  Run the multi-grid models                       ( WMWAVE )
!      3.  Finalization of wave model                      ( WMFINL )
!      4.  Finalization of driver
!     ----------------------------------------------------------------
!
!  9. Switches :
!
!       !/MPI   Including MPI routines / environment.
!
! 10. Source code :
!
!/ ------------------------------------------------------------------- /
      USE WMINITMD, ONLY: WMINIT, WMINITNML
      USE WMWAVEMD, ONLY: WMWAVE
      USE WMFINLMD, ONLY: WMFINL
!/
      USE WMMDATMD, ONLY: MDSI, MDSO, MDSS, MDST, MDSE, &
                          NMPROC, IMPROC, NMPSCR, NRGRD, ETIME
!/
      IMPLICIT NONE
!
!/MPI      INCLUDE "mpif.h"
!/
!/ ------------------------------------------------------------------- /
!/ Local parameters
!/
      INTEGER              :: I, MPI_COMM = -99
      INTEGER, ALLOCATABLE :: TEND(:,:)
      LOGICAL              :: FLGNML
!/MPI      INTEGER              :: IERR_MPI
!/
!/ ------------------------------------------------------------------- /
! 0.  Initialization necessary for driver
! 0.a General I/O: all can start with initialization in wmmdatmd
!
! 0.b MPI environment: Here, we use MPI_COMM_WORLD
!
!/MPI      CALL MPI_INIT      ( IERR_MPI )
!/MPI      MPI_COMM = MPI_COMM_WORLD
!/MPI      CALL MPI_COMM_SIZE ( MPI_COMM, NMPROC, IERR_MPI )
!/MPI      CALL MPI_COMM_RANK ( MPI_COMM, IMPROC, IERR_MPI )
!/MPI      IMPROC = IMPROC + 1
!
! 0.c Identifying output to "screen" unit
!
      IF ( IMPROC .EQ. NMPSCR ) WRITE (*,900)
!
!/ ------------------------------------------------------------------- /
! 1.  Initialization of all wave models / grids
!     Use only one of the calls ....
!
! ... Log and screen output, no separate test output file
!
!     CALL WMINIT ( MDSI, MDSO, MDSS, MDST, MDSE, 'ww3_multi.inp', MPI_COMM )
!
! ... Screen output disabled
!
!     CALL WMINIT ( MDSI, MDSO, MDSO, MDST, MDSE, 'ww3_multi.inp', MPI_COMM )
!
! ... Separate test output file and file preamble defined
!
!     CALL WMINIT ( MDSI, MDSO, MDSS, 10, MDSE, 'ww3_multi.inp', MPI_COMM,        &
!                   './data/' )
!
! ... Separate test output file
!
      INQUIRE(FILE="ww3_multi.nml", EXIST=FLGNML) 
      IF (FLGNML) THEN
        CALL WMINITNML ( MDSI, MDSO, MDSS, 10, MDSE, 'ww3_multi.nml', MPI_COMM )
      ELSE
        CALL WMINIT ( MDSI, MDSO, MDSS, 10, MDSE, 'ww3_multi.inp', MPI_COMM )
      END IF
!

!
!/ ------------------------------------------------------------------- /
! 2.  Run the wave model
!
      ALLOCATE ( TEND(2,NRGRD) )
!
      DO I=1, NRGRD
        TEND(:,I) = ETIME(:)
        END DO
!
      CALL WMWAVE ( TEND )
!
      DEALLOCATE ( TEND )
!
!/ ------------------------------------------------------------------- /
! 3.  Finalize the wave model
!
      CALL WMFINL
!
!/ ------------------------------------------------------------------- /
! 4   Finalize the driver
!
      IF ( IMPROC .EQ. NMPSCR ) WRITE (*,999)
!
!/MPI      CALL MPI_BARRIER ( MPI_COMM, IERR_MPI )
!/MPI      CALL MPI_FINALIZE  ( IERR_MPI )
!
! Formats
!
  900 FORMAT (/15X,'     *** WAVEWATCH III Multi-grid shell ***    '/ &
               15X,'================================================='/)
!
  999 FORMAT(//'  End of program '/                                   &
               ' ========================================'/           &
               '          WAVEWATCH III Multi-grid shell '/)
!/
!/ End of W3MLTI ----------------------------------------------------- /
!/
      END PROGRAM W3MLTI