#! /bin/bash

###############################
# use: - launch_gcm           #
#      - echo 22 | launch_gcm #
###############################

# Author : A. Spiga - Spring/Winter 2008 
# added link trick in 2011

        if [[ ! -d startbase ]]
        then
          echo "please create in $PWD a symbolic link: startbase"
          echo "for instance: ln -sf /san/home/spiga/DATAFILE/STARTBASE_64_48_32_t2 $PWD/startbase"
          echo "(and compile the GCM with the correct dimensions)"
          exit
        fi
##################
#startbase='../../STARTS/'
#startbase='/d2/emlmd/run_LMDZ.MARS.BETA.TASI/tau1/'
#startbase='/tmp7/aslmd/flush/'
#startbase='/tmp7/aslmd/flush2/'
#startbase='/d6/vblmd/MERIDIANI_EXOMARS/starts_en_cours/tau05/'
#startbase='/d5/aslmd/LMD_MM_MARS_DATA/STARTBASE_64_48_25_t2dust_JBM/'
##################

startbase=./startbase/

#
# get simulation start day and compute start/startfi required date (simulation day - 1)
#
echo '>>>' choose start sol ? ; read daygcm
  #if [[ "$daygcm" == 0 ]]
  #then
  #daygcm=669 
  #fi
daygcm=$(expr ${daygcm} - 1)

#
# find the correct start/startfi files among 3-day startbase
#
ls ${startbase}/start${daygcm}.nc > /dev/null 2> /dev/null
if [[ "$?" == 0 ]]
then
    echo found ! ${daygcm}
else
    #echo not found ! ${daygcm}	
    daygcm=$(expr ${daygcm} - 1)
    ls ${startbase}/start${daygcm}.nc > /dev/null 2> /dev/null
    if [[ "$?" == 0 ]]     # probably a 'while' loop would be better if more than 3
    then
	echo found ! ${daygcm}
    else
	#echo not found ! ${daygcm}    
	daygcm=$(expr ${daygcm} - 1)
        ls ${startbase}/start${daygcm}.nc > /dev/null 2> /dev/null	
        echo found ! ${daygcm}
    fi	
fi	

#
# link start/startfi files
#
ln -sf ${startbase}/start${daygcm}.nc start.nc
ln -sf ${startbase}/startfi${daygcm}.nc startfi.nc

#
# clean the place
#
rm -rf restart.nc 2> /dev/null 
rm -rf restartfi.nc 2> /dev/null
rm -rf log_gcm 2> /dev/null

#
# run !
#
echo running the GCM - check in ${PWD}/log_gcm 
nohup gcm.e > log_gcm

exit