#!/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}"
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 () {
cat <<EOF
Usage: $0 [OPTIONS] -platform <xmldesc> -hostfile <hostfile> program [program-options]
Options:
  -keep-temps                # don't remove the generated files after execution
  -wrapper <command>         # use command to run the program (e.g. "valgrind")
  -map                       # display the machine on which each process rank is mapped
  -np <numprocs>             # use that amount of processes from the hostfile.
                             # By default, all processes of the hostfile are used.
  -trace-ti                  # activate time independant tracing (for replay, default in smpi_simgrid.txt)
  -trace                     # activate tracing (Paje, default in smpi_simgrid.trace)
  -trace-comment <comment>   # put a comment on the top of the trace file
  -trace-comment-file <file> # put file contents on the top of the trace file as comment
  -trace-grouped             # group MPI processes by location
  -trace-resource            # trace resource utilization
  -trace-viva               # generate configuration for Viva's GraphView
  -trace-file <tracefile>    # name of the tracefile (simgrid_smpi.trace)
  -ext <value>               # additional parameter (reserved)

or (deprecated usage):
  $0 [-keep-temps] [-np <numprocs>] [-bandwidth <bytes/sec>] [-latency <secs>] program [program-options]

EOF
}

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

EXTOPT=""
WRAPPER=""

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
    ;;

   "-ext")
      EXTOPT="$2"
      shift 2
   ;;

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

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

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

   "-trace-comment")
      TRACE_COMMENT="$2"
      shift 2
   ;;

   "-trace-comment-file")
      TRACE_COMMENT_FILE="$2"
      shift 2
   ;;

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

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

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

   "-trace-viva")
   	TRACE_VIVA="true"
   	  shift 1
   ;;

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

   "-wrapper")
      WRAPPER="$2"
      shift 2
      ;;

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

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

if [ -n "$WRAPPER" ]; then
    EXEC="$WRAPPER $1"
else
    EXEC="$1"
fi
shift

# steel --cfg and --logs options
while [ $# -gt 0 ]; do
  case "$1" in
   "--cfg="*|"--log="*)
     for OPT in ${1#*=}
     do
       SIMOPTS="$SIMOPTS ${1%%=*}=$OPT"
     done
     shift 1
   ;;
    *)
      PROC_ARGS="${PROC_ARGS:+$PROC_ARGS }$1"
      shift      
    ;;
  esac
done


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

# Basic checks on the provided arguments
if [ -z "${EXEC}" ] ; then
    echo "You must provide a program to execute."
    usage
    exit 1
fi

if [ -z "${HOSTFILE}" ] && [ -z "${PLATFORM}" ] ; then
    echo "No hostfile nor platform specified."
    usage
    exit 1
fi

HOSTFILETMP=0
if [ -z "${HOSTFILE}" ] ; then
    HOSTFILETMP=1
    HOSTFILE="$(mktemp tmphostXXXXXX)"
    perl -ne 'print "$1\n" if /.*<host.*?id="(.*?)".*?\/>.*/' ${PLATFORM} > ${HOSTFILE}
fi

# Don't use wc -l to compute it to avoid issues with trailing \n at EOF
hostfile_procs=`grep -c "[a-zA-Z0-9]" $HOSTFILE`

if [ -z "${NUMPROCS}" ] ; then
    # Use the amount of processes in the hostfile as default value for the -np parameter
    NUMPROCS=$hostfile_procs
fi


if [ ${NUMPROCS} -gt ${hostfile_procs} ] ; then
    echo "You requested to use ${NUMPROCS} processes, but there is only ${hostfile_procs} processes in your hostfile..." >&2
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

if [ "${EXTOPT}" = "smpi_replay" ]; then
  APP_TRACES=$PROC_ARGS
  if [ -n "${APP_TRACES}" ] && [ -f "${APP_TRACES}" ]; then
     hosttraces=(`cat ${APP_TRACES} | tr \\\n " "`)
     NUMTRACES=`cat ${APP_TRACES} | wc -l`
  else
     printf "File not found: %s\n", "${APP_TRACES:-\${APP_TRACES\}}" >&2
     exit 1
  fi
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=\"${host}\" function=\"$i\"> <!-- function name used only for logging -->" >> ${APPLICATIONTMP}
  echo "    <argument value=\"$i\"/> <!-- rank -->" >> ${APPLICATIONTMP}
  if [ "${EXTOPT}" = "smpi_replay" ]; then
    if  [ ${NUMTRACES} -gt 1 ]; then
      echo "    <argument value=\"${hosttraces[$j]}\"/>" >> ${APPLICATIONTMP}
    else
      echo "    <argument value=\"${hosttraces[0]}\"/>" >> ${APPLICATIONTMP}
    fi
  else 
    for ARG in $PROC_ARGS; do
       echo "    <argument value=\"${ARG}\"/>" >> ${APPLICATIONTMP}
    done
  fi
  echo "  </process>" >> ${APPLICATIONTMP}
done

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

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

  if [ -n "${TRACE_COMMENT}" ]; then
    TRACEOPTIONS="${TRACEOPTIONS} --cfg=tracing/comment:${TRACE_COMMENT}"
  fi

  if [ -n "${TRACE_COMMENT_FILE}" ]; then
    TRACEOPTIONS="${TRACEOPTIONS} --cfg=tracing/comment_file:${TRACE_COMMENT_FILE}"
  fi

  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 "${TRACE_VIVA}" ]; then
    TRACEOPTIONS="${TRACEOPTIONS} --cfg=viva/categorized:smpi_cat.plist --cfg=viva/uncategorized:smpi_uncat.plist"
  fi
fi
##---------------------- end SMPI TRACING OPTIONS ---------------------------------

export SMPI_GLOBAL_SIZE=${NUMPROCS}
if [ -n "${KEEP}" ] ; then
  echo ${EXEC} ${TRACEOPTIONS} ${SIMOPTS} ${PLATFORMTMP} ${APPLICATIONTMP}
  if [ ${HOSTFILETMP} = 1 ] ; then
    echo "Generated hostfile ${HOSTFILE} keeped."
  fi
fi
${EXEC} ${TRACEOPTIONS} ${SIMOPTS} ${PLATFORMTMP} ${APPLICATIONTMP}
status=$?

if [ -z "${KEEP}" ] ; then
   if [ -z "${PLATFORM}" ]; then
	rm ${PLATFORMTMP}
   fi
   if [ ${HOSTFILETMP} = 1 ] ; then
        rm ${HOSTFILE}
   fi
   rm ${APPLICATIONTMP}
fi

exit $status