# Platform dependent configuration functions for MareNostrum
#(mnX.bsc.es)

function configure()
{
    # This function should configure all settings/modules needed to
    # later prepare the EC-Earth run directory and set variables used
    # in the run script

    # Set some MPI related variables, as recommend by BSC
    export I_MPI_DEVICE="rdssm:ofa-v2-mlx4_0-1u"

    # SCRATCH is not defined in MN3, define it here
    # and also make sure it is defined when compiling
    export SCRATCH=/gpfs/scratch/`id -gn`/${USER}

    # Configure paths for building/running EC-Earth
    ecearth_src_dir=[[[PLT:ACTIVE:ECEARTH_SRC_DIR]]]
    run_dir=[[[PLT:ACTIVE:RUN_DIR]]]
    ini_data_dir=[[[PLT:ACTIVE:INI_DATA_DIR]]]

    # File for standard output.
    # NOTE: This will be modified for restart jobs!
    stdout_file=${start_dir}/out/$(basename ${SLURM_JOB_NAME}).out

    # Resubmit this job for automatic restarts? [true/false]
    # Also, add options for the resubmit command here.
    resubmit_job=[[[PLT:ACTIVE:RESUBMIT_JOB]]]
    resubmit_opt="[[[PLT:ACTIVE:RESUBMIT_OPT]]]"

    # Configure grib api paths
    export GRIB_DEFINITION_PATH=[[[PLT:ACTIVE:GRIBAPI_BASE_DIR]]]/[[[PLT:ACTIVE:GRIBAPI_DEFINITION_SUBDIR]]]
    export GRIB_SAMPLES_PATH=[[[PLT:ACTIVE:GRIBAPI_BASE_DIR]]]/[[[PLT:ACTIVE:GRIBAPI_SAMPLES_SUBDIR]]]
    export GRIB_BIN_PATH=[[[PLT:ACTIVE:GRIBAPI_BASE_DIR]]]/[[[PLT:ACTIVE:GRIBAPI_BIN_SUBDIR]]]


    # Configure number of processors per node
    proc_per_node=[[[PLT:ACTIVE:PROC_PER_NODE]]]

    # Configure and load modules
    pre_load_modules_cmd="[[[PLT:ACTIVE:PRE_LOAD_MODULES_CMD]]]"
    module_list="[[[PLT:ACTIVE:MODULE_LIST]]]"

    if [ -n "${module_list}" ]
    then
        set +eu
        if [ -n "${pre_load_modules_cmd}" ]
        then
            ${pre_load_modules_cmd}
        fi
        for m in "${module_list}"
        do
            module add $m
        done
        set -eu
    fi

    # Add directories to the shared library search path
    if [ -n "[[[PLT:ACTIVE:ADD_TO_LD_LIBRARY_PATH]]]" ]
    then
        export LD_LIBRARY_PATH=${LD_LIBRARY_PATH:+${LD_LIBRARY_PATH}:}"[[[PLT:ACTIVE:ADD_TO_LD_LIBRARY_PATH]]]"
    fi

    export PATH=/gpfs/apps/MN3/CDO/1.8.2/bin:${PATH}

    ulimit -s unlimited
}

function launch()
{
    cmd="mpirun"

    while (( "$#" ))
    do
        # Get number of MPI ranks and executable name
        nranks=$1
        executable=./$(basename $2)
        shift
        shift

        cmd+=" -np $nranks $executable"

        # Add any arguments to executable
        while (( "$#" )) && [ "$1" != "--" ]
        do
            cmd+=" $1"
            shift
        done
        shift || true

        # Add colon of more executables follow
        (( "$#" )) && cmd+=" :"
    done

    export OMP_NUM_THREADS=1

    $cmd
}

function finalise()
{
    # This function should execute of any post run functionality, e.g.
    # platform dependent cleaning or a resubmit

    if ${resubmit_job} && [ $(date -d "${leg_end_date}" +%s) -lt $(date -d "${run_end_date}" +%s) ]
    then
        info "Resubmitting job for leg $((leg_number+1))"
        # Need to go to start_dir to find the run script
        cd ${start_dir}
        # Submit command
        # Note: This does not work if you explicitely specify a job name!
    fi
}