#!/bin/bash

@CMAKE_SMPI_COMMAND@

DEFAULT_LOOPBACK_BANDWIDTH="498000000"
DEFAULT_LOOPBACK_LATENCY="0.000004"
DEFAULT_NETWORK_BANDWIDTH="$((26 * 1024 * 1024))"
DEFAULT_NETWORK_LATENCY="0.000005"
DEFAULT_NUMPROCS="4"
DEFAULT_POWER="100"

LOOPBACK_BANDWIDTH="${DEFAULT_LOOPBACK_BANDWIDTH}"
LOOPBACK_LATENCY="${DEFAULT_LOOPBACK_LATENCY}"
NETWORK_BANDWIDTH="${DEFAULT_NETWORK_BANDWIDTH}"
NETWORK_LATENCY="${DEFAULT_NETWORK_LATENCY}"
NUMPROCS="${DEFAULT_NUMPROCS}"
POWER="${DEFAULT_POWER}"

SIMOPTS="--cfg=maxmin/precision:1e-9 --cfg=network/model:SMPI --cfg=network/TCP_gamma:4194304"

#usage to print the way this script should be called
function usage () {
    echo "usage:"
    echo "$0 [-quiet] [-keep-temps]"
    echo "      [-np <numprocs>] -platform <xmldesc> -hostfile <hostfile> [-map] program [program-options]"
    echo "      [-trace]                  # activate tracing"
    echo "      [-trace-grouped]          # group MPI processes by location"
    echo "      [-trace-resource]         # trace resource utilization"
    echo "      [-trace-triva]            # generate configuration for Triva's GraphView"
    echo "      [-trace-file <tracefile>] # name of the tracefile (simgrid_smpi.trace)"
    echo "or (deprecated usage):"
    echo "$0 [-quiet] [-keep-temps] [-np <numprocs>] [-bandwidth <bytes/sec>] [-latency <secs>] program [program-options]"
    echo
}

#check if we have at least one parameter
if [ $# -eq 0 ]
then
    usage
    exit
fi

while true; do
  case "$1" in
   "-np" | "-n")
      NUMPROCS="$2"
      shift 2
    ;;
   "-bandwidth")
      NETWORK_BANDWIDTH="$2"
      shift 2
    ;;
   "-latency")
      NETWORK_LATENCY="$2"
      shift 2
    ;;
   "-platform")
	PLATFORM="$2"
      if [ ! -f ${PLATFORM} ]; then
		echo "[$0] ** error: the file '${PLATFORM}' does not exist. Aborting."
		exit 1
      fi
	shift 2
    ;;
   "-hostfile")
	HOSTFILE="$2"
      if [ ! -f ${HOSTFILE} ]; then
		echo "[$0] ** error: the file '${HOSTFILE}' does not exist. Aborting."
		exit 1
      fi
	shift 2
    ;;

   "-map")
	MAPOPT="true"
      shift 1
   ;;

   "-trace")
   	TRACE_ACTIVE="true"
   	  shift 1
   ;;

   "-trace-file")
      TRACE_FILENAME="$2"
      shift 2
   ;;

   "-trace-grouped")
      TRACE_GROUPED="true"
      shift 1
   ;;

   "-trace-resource")
      TRACE_RESOURCE="true"
      shift 1
   ;;

   "-trace-triva")
   	TRACE_TRIVA="true"
   	  shift 1
   ;;

   "-keep-temps")
	KEEP="true"
      shift 1
   ;;

   "-help" | "--help" | "-h")
      usage
      exit
   ;;

   "--cfg="*|"--log="*)
     for OPT in ${1#*=}
     do
       SIMOPTS="$SIMOPTS ${1%%=*}=$OPT"
     done
     shift 1
   ;;
    *)
      break
    ;;
  esac
done

EXEC="$1"
shift

##-----------------------------------

# test if we have something to execute, otherwise show usage and exit
if [ -z ${EXEC} ]
then
    echo "Program is missing"
    usage
    exit 1
fi



##-------------------------------- DEFAULT or SPECIFIED PLATFORM --------------------------------------
if [ -z "${PLATFORM}" ]; then
	PLATFORMTMP="$(mktemp tmpXXXXXX)"

	cat > ${PLATFORMTMP} <<PLATFORMHEAD
<?xml version='1.0'?>
<!DOCTYPE platform SYSTEM "http://simgrid.gforge.inria.fr/simgrid.dtd">
<platform version="3">
<AS id="AS0" routing="Full">
PLATFORMHEAD

for (( i=${NUMPROCS}; $i ; i=$i-1 )) do
  echo "  <host id=\"host$i\" power=\"${POWER}\"/>" >> ${PLATFORMTMP}
  echo "  <link id=\"loop$i\" bandwidth=\"${LOOPBACK_BANDWIDTH}\" latency=\"${LOOPBACK_LATENCY}\"/>" >> ${PLATFORMTMP}
  echo "  <link id=\"link$i\" bandwidth=\"${NETWORK_BANDWIDTH}\" latency=\"${NETWORK_LATENCY}\"/>" >> ${PLATFORMTMP}
done

for (( i=${NUMPROCS}; $i ; i=$i-1 )) do
  for (( j=${NUMPROCS}; $j ; j=$j-1 )) do
    if [ $i -eq $j ]; then
      echo "  <route src=\"host$i\" dst=\"host$j\"><link_ctn id=\"loop$i\"/></route>" >> ${PLATFORMTMP}
    else
      echo "  <route src=\"host$i\" dst=\"host$j\"><link_ctn id=\"link$i\"/><link_ctn id=\"link$j\"/></route>" >> ${PLATFORMTMP}
    fi
  done
done

cat >> ${PLATFORMTMP} <<PLATFORMFOOT
</AS>
</platform>
PLATFORMFOOT

else
	PLATFORMTMP=${PLATFORM}
fi
##-------------------------------- end DEFAULT or SPECIFIED PLATFORM --------------------------------------

##-------------------------------- DEFAULT APPLICATION --------------------------------------
APPLICATIONTMP="$(mktemp tmpXXXXXX)"
#APPLICATIONTMP="app.xml"


cat > ${APPLICATIONTMP} <<APPLICATIONHEAD
<?xml version='1.0'?>
<!DOCTYPE platform SYSTEM "http://simgrid.gforge.inria.fr/simgrid.dtd">
<platform version="3">
APPLICATIONHEAD

##---- cache hostnames of hostfile---------------
if [ -n "${HOSTFILE}" ] && [ -f ${HOSTFILE} ]; then
	hostnames=(`cat ${HOSTFILE} | tr \\\n " "`)
      NUMHOSTS=`cat ${HOSTFILE} | wc -l`
fi

##----------------------------------------------------------
##  generate application.xml with hostnames from hostfile:
##  the name of host_i (1<=i<=p, where -np p) is the line i
##  in hostfile (where -hostfile hostfile), or "host$i" if
##  hostfile has less than i lines.
##----------------------------------------------------------

HAVE_SEQ="`which seq 2>/dev/null`"

if [ -n "${HAVE_SEQ}" ]; then
	SEQ=`${HAVE_SEQ} 0 $((${NUMPROCS}-1))`
else
      cnt=0
	while (( $cnt < ${NUMPROCS} )) ; do
	    SEQ="$SEQ $cnt"
	    cnt=$((cnt + 1));
	done
fi

##---- generate <process> tags------------------------------

for i in ${SEQ}
do
  if [ -n "${HOSTFILE}" ]; then
	j=$(( $i % ${NUMHOSTS} ))
  fi
  ##---- optional display of ranks to process mapping
  if [ -n "${MAPOPT}" ]; then
	echo "[rank $i] -> ${hostnames[$j]}"
  fi

  if [ -z "${hostnames[$j]}" ]; then
	host="host"$(($j+1))
  else
	host="${hostnames[$j]}"
  fi
  echo "  <process host=\"${host}\" function=\"rank$i\"> <!-- function name used only for logging -->" >> ${APPLICATIONTMP}
  echo "    <argument value=\"$i\"/> <!-- rank -->" >> ${APPLICATIONTMP}
  for ARG in $*; do
    echo "    <argument value=\"${ARG}\"/>" >> ${APPLICATIONTMP}
  done
  echo "  </process>" >> ${APPLICATIONTMP}
done

cat >> ${APPLICATIONTMP} <<APPLICATIONFOOT
</platform>
APPLICATIONFOOT
##-------------------------------- end DEFAULT APPLICATION --------------------------------------

##---------------------- SMPI TRACING OPTIONS ---------------------------------
if [ -n "${TRACE_ACTIVE}" ]; then
  #define trace filename
  if [ -z "${TRACE_FILENAME}" ]; then
    TRACE_FILENAME="smpi_simgrid.trace"
  fi
  TRACEOPTIONS="--cfg=tracing:1 --cfg=tracing/filename:${TRACE_FILENAME} --cfg=tracing/smpi:1"

  if [ -n "${TRACE_GROUPED}" ]; then
    TRACEOPTIONS="${TRACEOPTIONS} --cfg=tracing/smpi/group:1"
  fi

  if [ -n "${TRACE_RESOURCE}" ]; then
    TRACEOPTIONS="${TRACEOPTIONS} --cfg=tracing/categorized:1 --cfg=tracing/uncategorized:1"
  fi

  if [ -n "${TRACE_TRIVA}" ]; then
    TRACEOPTIONS="${TRACEOPTIONS} --cfg=triva/categorized:smpi_cat.plist --cfg=triva/uncategorized:smpi_uncat.plist"
  fi
fi
##---------------------- end SMPI TRACING OPTIONS ---------------------------------

export SMPI_GLOBAL_SIZE=${NUMPROCS}
if [ -n "${KEEP}" ] ; then
  echo ${EXEC} ${SIMOPTS} ${TRACEOPTIONS} ${PLATFORMTMP} ${APPLICATIONTMP}
fi
${EXEC} ${SIMOPTS} ${TRACEOPTIONS} ${PLATFORMTMP} ${APPLICATIONTMP}

if [ -z "${KEEP}" ] ; then
   if [ -z "${PLATFORM}" ]; then
	rm ${PLATFORMTMP}
   fi
   rm ${APPLICATIONTMP}
fi