#!/bin/bash
########################################################################
# Script to perform several chained LMD Mars GCM simulations
# SET HERE the maximum total number of simulations

nummax=1

# Also, ensure that the gcm executable name is correct below:
gcm=gcm.e
#
########################################################################
set -x

echo "---------------------------------------------------------"
echo "Starting run0..."

dir=`pwd`
machine=`hostname`
address=`whoami`

# Check if GCM executable exists and is executable
if [ ! -x $gcm ]; then
  echo "Error: file \"$gcm\" not found or not executable in $dir!"
  exit 1
fi

# Look for file "num_run" which should contain
# the value of the previously computed season
# (defaults to 0 if file "num_run" does not exist)
if [[ -r num_run ]] ; then
  echo "Found file \"num_run\""
  numold=`cat num_run`
else
  numold=0
fi
echo "numold is set to" $numold

# Set value of current season
numnew=$((numold + 1 ))
echo "numnew is set to" $numnew

# Look for initialization data files (exit if none found)
if [[ ( -r start${numold}.nc  &&  -r startfi${numold}.nc ) ]] ; then
   \cp -f start${numold}.nc start.nc
   \cp -f startfi${numold}.nc startfi.nc
else
   if (( numold == 99999 )) ; then
     echo "Error: no run because previous run crashed! (99999 in \"num_run\")"
     exit 1
   else
     echo "Error: missing input files \"start${numold}.nc\" or \"startfi${numold}.nc\" in $dir!"
     exit 1
   fi
fi


# Run GCM
./$gcm > lrun${numnew} 


# Check if run ended normaly and copy datafiles
if [[ ( -r restartfi.nc  &&  -r restart.nc ) ]] ; then
  echo "Run seems to have ended normally."
  \mv -f restartfi.nc startfi${numnew}.nc
  \mv -f restart.nc start${numnew}.nc
else
  echo "Error: Run crashed or incomplete output!"
  if [[ -r num_run ]] ; then
    \mv -f num_run num_run.crash
  else
    echo "No file num_run to build \"num_run.crash\" from!"
    # Impose a default value of 0 for num_run
    echo 0 > num_run.crash
  fi
  echo 99999 > num_run
############## To receive an Email message if the run crashes ########
mail -s "Crash in GCM run" $address <<ENDMAIL
The GCM run on $machine in $dir has just crashed.
Check the output logs for more information.
ENDMAIL
#############################################
  exit 1
fi

# Copy other datafiles that may have been generated
if [[ -r diagfi.nc ]] ; then
  \mv -f diagfi.nc diagfi${numnew}.nc
fi
if [[ -r diagsoil.nc ]] ; then
  \mv -f diagsoil.nc diagsoil${numnew}.nc
fi
if [[ -r stats.nc ]] ; then
  \mv -f stats.nc stats${numnew}.nc
fi
if [[ -f profiles.dat ]] ; then
  \mv -f profiles.dat profiles${numnew}.dat
  \mv -f profiles.hdr profiles${numnew}.hdr
fi

# Prepare things for upcoming runs by writing
# value of computed season in file num_run
echo $numnew > num_run

# If we are over nummax : stop
if (( $numnew + 1 > $nummax )) ; then
  exit 0
else
  \cp -f run0 exe_mars
  ./exe_mars
fi