#! /bin/sh 
# ============================================================================
# Changes:
# ============================================================================
# SYNOPSYS:
#		medley [[emulator] sysout]
#
#	If no arguments are passed to the utility, it will try to find
#	an emulator and sysout based on DEFAULTDIR. When arguments are 
#	given, it will try to be "smart" when finding files.
#
#	It also will try to find a file containing the Medley software key.
#	If it doesn't find one, it will prompt for a valid key.
#	
# ============================================================================

#----------          Change if necessary           ----------
DEFAULTEMULATOR=lde 
DEFAULTSYSOUT=LISP.SYSOUT
DEFAULTDIR=REPLACEME	# Normally updated by installation script

#************************************************************
#********* Changes below this point should normally *********
#*********            not be required               *********
#************************************************************

APPLICATION="Medley 2.0"
SCRIPTNAME=`/bin/basename $0`
HOSTNAME=`/usr/ucb/hostname`

KEYFILENAME=".medleyKey.$HOSTNAME"

exitScript(){
	echo "$1"
	exit
}

smartPath() {
	FILE=`/bin/basename $1`
	if [ -f "$1" ]
	then FILEPATH=$1
	elif [ "$FILE" = "$1" ]
	then 	if [ -f "$2/$1" ]
		then FILEPATH="$2/$1"
		elif [ -f "$HOME/$1" ]
		then FILEPATH="$HOME/$1"
		elif [ -f "$HOME/medley/$1" ]
		then FILEPATH="$HOME/medley/$1"
		else exitScript "$3 file not found: $1"
		fi
	else exitScript "$3 file not found: $1"
	fi
}

parseCommand() {
	case $# in 
	[012])	getOSVersion
		# Now set the machine type 
		EMULATORDIR=install.sunos${OSVERSION} 
		PATH=$PATH:$DEFAULTDIR/$EMULATORDIR:.
		cd $DEFAULTDIR/$EMULATORDIR
		export PATH
		case $# in 
		0)	EMULATOR=$DEFAULTEMULATOR ;;
		1)	EMULATOR=$DEFAULTEMULATOR
			smartPath $1 $DEFAULTDIR/lispsysouts Sysout
			SYSOUT=$FILEPATH ;;
		2)	EMULATOR=$1
			smartPath $2 $DEFAULTDIR/lispsysouts Sysout
			SYSOUT=$FILEPATH ;;
		esac ;;
	*)	echo "Usage: $SCRIPTNAME [[emulator] sysout]"
		exit ;;
	esac
}

setOSVersion(){
	unset validOSVersionP
	case "$1" in
	3|3.[X245]) OSVERSION=3 ;;
	4.0|4.0.*) OSVERSION=4 ;;
	4.1|4.1.*) OSVERSION=4.1 ;;
	5.*) OSVERSION=5 ;;
	*) 	MESSAGE="Invalid reply: $answer"
		validOSVersionP=notTrue ;;
	esac
	[ ${validOSVersionP:-true} = true ]
}

askOSVersion(){
	MESSAGE="$1"
	while [ ${menuloop:-notdone} = notdone ]
	do	/usr/ucb/clear

		echo "
<---------------> OS Options Menu <--------------->
    3.X - SunOS 3.2 3.4 3.5
    4.0 - SunOS 4.0 4.0.X
    4.1 - SunOS 4.1 4.1.X
    5.0 - SunOS 5.0 and up.
${MESSAGE:+
$MESSAGE}"
		unset MESSAGE
		echo -n "Select : "
		answer=`/usr/bin/line`
		if setOSVersion $answer
		then menuloop=done
		fi
	done
}

getOSVersion() {
	if [ -f /etc/motd ]
	then	if setOSVersion `/usr/ucb/sed -e '1s/.*SunOS \(...\).*/\1/' -e '1q' < /etc/motd`
		then echo -n ""
		else echo "$MESSAGE"
		fi
	else	askOSVersion "Please specify the SunOS version you are running."
	fi
}

validKeyP() {
	unset keyTooLongP
	VALID=`echo $* | /bin/awk '/[^0-9a-fA-F ]/'`
	for group in $*
	do	LENGTH=`echo $group | /bin/awk '{print length}'`
		if [ "$LENGTH" -gt 8 ]
		then keyTooLongP=true
		fi
	done
	[ $# = 3 -a "$VALID" = "" -a ${keyTooLongP:-notTrue} = notTrue ]
}

saveKey() {
	echo "Saving key '$KEY' into file '$KEYFILENAME' ..."
	echo -n "Trying $DEFAULTDIR/$KEYFILENAME ..."
	if [ -w "$DEFAULTDIR" ]
	then	echo "$KEY" > "$DEFAULTDIR/$KEYFILENAME"
	else	echo " Write protected ! "
		echo -n "Trying $HOME/$KEYFILENAME instead ..."
		echo "$KEY" > "$HOME/$KEYFILENAME"
	fi
	if [ $? = 0 ]
	then echo " Done"
	else echo " Some error occured \! "
	fi
}

keyDefinedP() {
	if [ -f "$DEFAULTDIR/$KEYFILENAME" ]
	then	if [ -r "$DEFAULTDIR/$KEYFILENAME" ]
		then KEYFILE="$DEFAULTDIR/$KEYFILENAME"
		else echo "ERROR! Cannot read file: $DEFAULTDIR/$KEYFILE"
		fi
	elif [ -f "$HOME/$KEYFILENAME" ]
	then	KEYFILE="$HOME/$KEYFILENAME"
	else	echo "
	To start $APPLICATION, a host access key is required.
	Call Venue at (1-800-228-5325) for one,

	and be prepared to give them your workstations host ID#
"
	fi
	[ ${KEYFILE:-notSpecified} != notSpecified ]
}

promptForKey () {
	while [ ${VALIDKEYP:-notValid} = notValid ]
	do	echo "Your workstations host ID# is: `hostid`"
		echo -n "Type in the key or [^C] to abort: "
		KEY=`/usr/bin/line`

		if validKeyP $KEY
		then VALIDKEYP=x
		else echo "Sorry, invalid key: $KEY"
		fi
	done
}


#************************************************************
#**********           Main piece of code           **********
#************************************************************

trap 'echo "
$SCRIPTNAME: Aborted ..."; exit' 2

parseCommand $*

if keyDefinedP
then	KEY=`/usr/bin/cat $KEYFILE`
else	promptForKey 
	saveKey
fi


# Well, I think we might be ready to give it a try
echo "Starting up $APPLICATION ..."
/bin/sleep 2
$EMULATOR $SYSOUT -k "$KEY"