! $Id: phys_cal_mod.F90 5116 2024-07-24 12:54:37Z fairhead $
MODULE phys_cal_mod
  ! This module contains information on the calendar at the current time step

  INTEGER, SAVE :: year_cur      ! current year
  !$OMP THREADPRIVATE(year_cur)
  INTEGER, SAVE :: mth_cur       ! current month
  !$OMP THREADPRIVATE(mth_cur)
  INTEGER, SAVE :: day_cur       ! current day
  !$OMP THREADPRIVATE(day_cur)
  INTEGER, SAVE :: days_elapsed  ! number of whole days since start of the current year
  !$OMP THREADPRIVATE(days_elapsed)
  INTEGER, SAVE :: mth_len       ! number of days in the current month
  !$OMP THREADPRIVATE(mth_len)
  INTEGER, SAVE :: year_len      ! number of days in the current year
  !$OMP THREADPRIVATE(year_len)
  REAL, SAVE :: hour         ! seconds elapsed (in the current day) since midnight
  !$OMP THREADPRIVATE(hour)
  REAL, SAVE :: jD_1jan
  !$OMP THREADPRIVATE(jD_1jan)
  REAL, SAVE :: jH_1jan
  !$OMP THREADPRIVATE(jH_1jan)
  REAL, SAVE :: xjour
  !$OMP THREADPRIVATE(xjour)
  REAL, SAVE :: jD_cur  ! jour courant a l'appel de la physique (jour julien)
  !$OMP THREADPRIVATE(jD_cur)
  REAL, SAVE :: jH_cur  ! heure courante a l'appel de la physique (jour julien)
  !$OMP THREADPRIVATE(jH_cur)
  REAL, SAVE :: jD_ref  ! jour du demarage de la simulation (jour julien)
  !$OMP THREADPRIVATE(jD_ref)
  CHARACTER (len = 10) :: calend ! type of calendar to use
  ! (can be earth_360d, earth_365d or earth_366d)
  !$OMP THREADPRIVATE(calend)

CONTAINS

  SUBROUTINE phys_cal_init(annee_ref, day_ref)

    USE IOIPSL, ONLY: ymds2ju, ioconf_calendar
    USE lmdz_phys_para, ONLY: is_master, is_omp_master
    USE lmdz_ioipsl_getin_p, ONLY: getin_p
    USE lmdz_abort_physic, ONLY: abort_physic

    IMPLICIT NONE
    INTEGER, INTENT(IN) :: annee_ref
    INTEGER, INTENT(IN) :: day_ref

    ! Find out which type of calendar we are using
    calend = 'earth_360d' ! default
    CALL getin_p("calend", calend)

    IF (is_omp_master) THEN
      IF (calend == 'earth_360d') THEN
        CALL ioconf_calendar('360_day')
      ELSE IF (calend == 'earth_365d') THEN
        CALL ioconf_calendar('noleap')
      ELSE IF (calend == 'earth_366d' .OR. calend == 'gregorian') THEN
        CALL ioconf_calendar('gregorian')
      ELSE
        CALL abort_physic('phys_cal_init', 'Mauvais choix de calendrier', 1)
      ENDIF
    ENDIF
    !$OMP BARRIER

    CALL ymds2ju(annee_ref, 1, day_ref, 0., jD_ref)
    jD_ref = INT(jD_ref)

  END SUBROUTINE  phys_cal_init

  SUBROUTINE phys_cal_update(julian_date)
    ! This SUBROUTINE updates the module saved variables.

    USE IOIPSL, ONLY: ju2ymds, ymds2ju, ioget_mon_len, ioget_year_len
    IMPLICIT NONE
    REAL, INTENT(IN) :: julian_date

    jD_cur = INT(julian_date)
    jH_cur = julian_date - jD_cur

    CALL ju2ymds(jD_cur + jH_cur, year_cur, mth_cur, day_cur, hour)
    CALL ymds2ju(year_cur, 1, 1, 0., jD_1jan)

    jH_1jan = jD_1jan - int (jD_1jan)
    jD_1jan = int (jD_1jan)
    xjour = jD_cur - jD_1jan
    days_elapsed = jD_cur - jD_1jan

    ! Get lenght of current month
    mth_len = ioget_mon_len(year_cur, mth_cur)

    ! Get length of current year
    year_len = ioget_year_len(year_cur)

  END SUBROUTINE phys_cal_update

END MODULE phys_cal_mod