#!/bin/sh

# the object is to make a launcher script that works with a command file to determine when to launch the application that it is responsible for

#DOMAIN=$(pwd |sed "s%/home/nevrax/%%" | sed "s%/.*%%")
DOMAIN=shard
#NAME_BASE=$(pwd | sed 's/\/home\/nevrax\///' | sed 's/^.*\///')

NAME_BASE="$1/$1"
mkdir $1
shift

#if [ _$DOMAIN == _pre_live ]
#	then
	CTRL_FILE=${NAME_BASE}.launch_ctrl
	NEXT_CTRL_FILE=${NAME_BASE}.deferred_launch_ctrl
#elif [ _$DOMAIN == _pre_pre_live ]
#	then
#	CTRL_FILE=${NAME_BASE}.launch_ctrl
#	NEXT_CTRL_FILE=${NAME_BASE}.deferred_launch_ctrl
#else
#	CTRL_FILE=${NAME_BASE}_immediate.launch_ctrl
#	NEXT_CTRL_FILE=${NAME_BASE}_waiting.launch_ctrl
#fi
STATE_FILE=${NAME_BASE}.state
START_COUNTER_FILE=${NAME_BASE}.start_count
CTRL_CMDLINE=$*

echo
echo ---------------------------------------------------------------------------------
echo Starting service launcher
echo ---------------------------------------------------------------------------------
printf "%-16s = " CMDLINE         ; echo $CTRL_CMDLINE
printf "%-16s = " CTRL_FILE       ; echo $CTRL_FILE
printf "%-16s = " NEXT_CTRL_FILE  ; echo $NEXT_CTRL_FILE
printf "%-16s = " STATE_FILE      ; echo $STATE_FILE
echo ---------------------------------------------------------------------------------
echo

# reinit the start counter
echo 0 > $START_COUNTER_FILE
START_COUNTER=0

echo Press ENTER to launch program
while true
do

  # see if the conditions are right to launch the app
  if [ -e $CTRL_FILE ]
      then

      # a control file exists so read it's contents
      CTRL_COMMAND=_$(cat $CTRL_FILE)_

      # do we have a 'launch' command?
      if [ $CTRL_COMMAND == _LAUNCH_ ]
          then

		  # update the start counter
		  START_COUNTER=$(( $START_COUNTER + 1 ))
		  echo $START_COUNTER > $START_COUNTER_FILE

		  # big nasty hack to deal with the special cases of ryzom_naming_service and ryzom_admin_service who have badly names cfg files
		  for f in ryzom_*cfg
		    do
		    cp $f $(echo $f | sed "s/ryzom_//")
		  done

		  # we have a launch command so prepare, launch, wait for exit and do the housekeeping
		  echo -----------------------------------------------------------------------
		  echo Launching ...
		  echo
		  printf RUNNING > $STATE_FILE

          $CTRL_CMDLINE

		  echo -----------------------------------------------------------------------
		  printf STOPPED > $STATE_FILE

		  # consume (remove) the control file to allow start once
		  rm $CTRL_FILE

		  echo Press ENTER to relaunch
       fi
  fi

  # either we haven't launched the app yet or we have launched and it has exitted
  if [ -e $NEXT_CTRL_FILE ]
  then
      # we have some kind of relaunch directive lined up so deal with it
      mv $NEXT_CTRL_FILE $CTRL_FILE
  else
      # give the terminal user a chance to press enter to provoke a re-launch
      HOLD=HOLD
      read -t2 HOLD
      if [ _${HOLD}_ != _HOLD_ ]
	  then
	  printf LAUNCH > $CTRL_FILE
      fi
  fi

done

