#!/usr/bin/env bash
#--------------------------------------------------------------------------------#
# This file is part of the PALM model system.
#
# PALM is free software: you can redistribute it and/or modify it under the terms
# of the GNU General Public License as published by the Free Software Foundation,
# either version 3 of the License, or (at your option) any later version.
#
# PALM is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with
# PALM. If not, see <http://www.gnu.org/licenses/>.
#
# Copyright 1997-2018  Leibniz Universitaet Hannover
#--------------------------------------------------------------------------------#
#
# Current revisions:
# -----------------
# 
# 
# Former revisions:
# -----------------
# $Id: palm_simple_run 2850 2018-03-05 14:24:40Z kanani $
# Refactoring of the palm_simple_ build and run scripts
# 
# 2718 2018-01-02 08:49:38Z maronga
# Corrected "Former revisions" section
#
# 2696 2017-12-14 17:12:51Z kanani
# Change in file header (GPL part)
#
# 2225 2017-05-16 11:36:20Z raasch
# shell changed to bash
#
# 1310 2014-03-14 08:01:56Z raasch
# update GPL copyright
#
# 1221 2013-09-10 08:59:13Z raasch
# setting of PGI_ACC_SYNCHRONOUS=1 for running with pgi-openacc
#
# 1172 2013-05-30 11:46:00Z raasch
# for performance reasons set PGI_ACC_SYNCHRONOUS=1 for pgi/openacc execution
#
# 1171 2013-05-30 11:27:45Z raasch
# new option -e which defines the execution command to be used to run PALM
#
# 1046 2012-11-09 14:38:45Z maronga
# code put under GPL (PALM 3.9)
#
# 29/08/11 - BjornW - Adapted for lcflow (ForWind cluster in Oldenburg)
# 18/03/10 - Siggi  - Some comments changed
# 25/01/10 - Siggi  - Generating the first version


#--------------------------------------------------------------------------------#
# palm_simple_run - a simple method for running the palm code without
#                   using the mrun script
#
# This script runs the palm code in a unique subdirectory (OUTPUT...,
# current time/date and number of processors are part of the subdirectory
# name).
# It requires that palm has been installed with command
# palm_simple_install and that the executable palm has been created
# with make in directory  ...../MAKE_DEPOSITORY_simple
#--------------------------------------------------------------------------------#
SOURCE="${BASH_SOURCE[0]}"
while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
  DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
  SOURCE="$(readlink "$SOURCE")"
  # if $SOURCE was a relative symlink, we need to resolve it
  # relative to the path where the symlink file was located
  [[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE"
done
SCRIPT_LOCATION="$( cd -P "$( dirname "$SOURCE" )" && pwd )"

working_dir=$(readlink -f "${SCRIPT_LOCATION}/../../")
trunk_dir=$(readlink -f "${SCRIPT_LOCATION}/../")

# Variable declarations + default values
build_config=unknown
run_config=unknown
test_case=unknown
mpi_ranks=1
mpi_ranks_per_node=1
openmp_threads=1
localhost_realname=$(hostname)
cpumax=999999

print_help() {
   echo "Usage: palm_simple_run -b <build-config> -c <run-config> -s <test-case>"
   echo "                       [-n <mpi-ranks-per-node>] [-p <mpi-ranks>]"
   echo "                       [-t <openmp-threads>]"
   echo ""
   echo "List of allowed option:"
   echo ""
   echo "   -b <build-config>        Suffix of any MAKE.inc.<build-config> file in the trunk/INSTALL dir."
   echo "   -c <run-config>          Suffix of any RUN.cmd.<run-config> file in the trunk/INSTALL dir."
   echo "   -n <mpi-ranks-per-node>  Number of MPI ranks per compute node."
   echo "   -p <mpi-ranks>           Number of MPI ranks in total."
   echo "   -s <test-case>           Prefix of any <test-case>_p3d file in the trunk/INSTALL dir."
   echo "   -t <openmp-threads>      Number of OpenMP threads"
   echo ""
   echo ""
}


   # Read shellscript options
while  getopts  :b:c:n:p:s:t:h  option
do
  case  $option  in
      (b)   build_config=$OPTARG;;
      (c)   run_config=$OPTARG;;
      (n)   mpi_ranks_per_node=$OPTARG;;
      (p)   mpi_ranks=$OPTARG;;
      (s)   test_case=$OPTARG;;
      (t)   openmp_threads=$OPTARG;;
      (h)   print_help
            exit 0;;
      (\?)  echo "Unknown option -$OPTARG"
            print_help
            exit 1;;
  esac
done

if [[ ${build_config} == "unknown" ]]
then
   echo "Missing option -b <build-config>"
   print_help
   exit 1
fi

if [[ ${run_config} == "unknown" ]]
then
   echo "Missing option -c <run-config>"
   print_help
   exit 1
fi

if [[ ${test_case} == "unknown" ]]
then
   echo "Missing option -s <test-case>"
   print_help
   exit 1
fi

build_dir=${working_dir}/BUILD_${build_config}

if [[ ! -d ${build_dir} ]]
then
   echo "+++ ERROR: No build for configuration ${build_config} exists! "
   echo "           Please run \"palm_simple_install -b ${build_config}\""
   echo "           or specify a different build that this run should be based on"
   exit 1
fi

   # Check, if include file exists
run_config_file=${trunk_dir}/INSTALL/RUN.cmd.${run_config}
if [[ ! -f ${run_config_file} ]]
then
   echo "+++ ERROR: no such run command file:"
   echo "    \"${run_config_file}\""
   exit 1
fi

   # Find out the global svn revision number
global_revision=$(svnversion ${trunk_dir}  2>/dev/null)
global_revision="Rev: $global_revision"


   # Generate unique directory/files for this run
#timedate="$(date +%F_%H:%M:%S)"
suffix=${build_config}_${run_config}_${test_case}_${mpi_ranks}_${mpi_ranks_per_node}_${openmp_threads}
execution_dir=${working_dir}/RUN_${suffix}

if [[ ! -d ${execution_dir} ]]
then
   mkdir -p ${execution_dir}
   echo "*** PALM running in directory ${execution_dir}"
else
   echo "+++ ERROR: ${execution_dir} exists\!   Must be unique.  Exiting."
   exit 1
fi


# Check if palm has been installed and copy executable into the run
# directory
if [[ ! -f ${build_dir}/palm ]]
then
   echo "+++ ERROR: palm executable does not exist."
   echo "           Please run \"palm_simple_install\"."
   exit 1
else
   cp  ${build_dir}/palm  ${execution_dir}/palm
fi


# Check, if parameter file exists and copy into the run directory
if [[ ! -f ${trunk_dir}/INSTALL/${test_case}_p3d ]]
then
   echo "+++ ERROR: parameter file"
   echo "           \"${trunk_dir}/INSTALL/${test_case}_p3d\""
   echo "           does not exist."
   exit 1
else
   cp  ${trunk_dir}/INSTALL/${test_case}_p3d  ${execution_dir}/PARIN
fi




# Create NAMELIST file containing environment values needed by palm
cat  >  ${execution_dir}/ENVPAR  <<  EOF
&envpar  run_identifier = '${test_case}',
         host = 'localhost',
         revision = '${global_revision}',
         tasks_per_node = ${mpi_ranks_per_node},
         maximum_parallel_io_streams = ${mpi_ranks_per_node},
         batch_job = .TRUE.,
         write_binary = .FALSE.,
         maximum_cpu_time_allowed = ${cpumax}.,
         local_dvrserver_running = .FALSE.,
/
EOF


# Coupled runs cannot be carried out with this simple run script
echo "no_coupling"  >  ${execution_dir}/runfile_atmos


# Generate hostfile (if neccessary)
(( ii = 1 ))
while (( ii <= $mpi_ranks ))
do
   echo  $localhost_realname  >>  ${execution_dir}/hostfile
   (( ii = ii + 1 ))
done


# Switch to run directory
cd  ${execution_dir}

# Start palm run
echo "*** PALM will be executed with configuration: ${run_config}"
echo "       MPI ranks in total: $mpi_ranks"
echo "       MPI ranks per node: $mpi_ranks_per_node"
echo "       OpenMP threads:     $openmp_threads"

# execute according to the run command file
source ${run_config_file}

echo "*** PALM execution finished. Results can be found in:"
echo "    \"${execution_dir}\""
exit 0