#!/bin/sh
# Fritz Sieker
#set -x

#----------------------------------------------------------------------------
# get the testCases file, preferring one with the suffix
getTestCases() {
  if [  -f testCases.${assignName} ]
  then
    name=$topDir/testCases.${assignName}
  elif [ -f testCases ]
  then
    name=$topDir/testCases
  else
    name=
  fi

  if [ -z "$name" ]
  then
    echo "Error: can not find testCases file" >&2
  fi

  echo $name
}

#----------------------------------------------------------------------------
# extract field delimited by %, trim leading/trailing whitespace
getPfield() {
  echo $2 | cut -d'%' -f$1 | sed -e 's/^[ \t]*//; s/[ \t]*$//'
}

#----------------------------------------------------------------------------
# determine number of point is assignment
computeTotalPoints() {
  rm -f junk
  touch junk

  FS= 

  sed -e "$sedCmd" $testCases | while read testCaseLine
  do
    points=`getPfield 2 "$testCaseLine"`
    echo $points >> junk
  done

  total=`sumCol.pl 1 junk`
  rm -f junk
  echo $total
}

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

if [ $#  -lt 1 ]
then
  echo "Usage: genGrades <assignName> [gradeDir]"
  echo
  echo "Ex: genGrades PA1"
  echo "Ex: genGrades PA1 ~/Checkin/PA1"
  exit 1
fi

header="Assignment Grade:"

assignName=$1

if [ $# -eq 2 ]
then
  gradeDir=$2
else
  gradeDir=grades.${assignName}
fi

summaryFile=$gradeDir/SUMMARY
# Recreate $summaryFile or just append?
rm -f $summaryFile
touch $summaryFile

topDir=`pwd`

testCases=`getTestCases`
if [ -z "$testCases" ]
then
  exit 1
fi

# del everything after #; del leading/trailng whitespace; del blank lines
sedCmd='s/#.*// ; s/^[ \t]*// ; s/[ \t]*$// ; /^$/d'

maxValue=`computeTotalPoints`

if [ -f gradeThese ]
then
  list=gradeThese
else
  list=~/Checkin/allLogins
fi

FS= 

for login in `sed -e "$sedCmd" $list`
do
  if [ -n "$login" ]
  then
    echo "gen grade for: $login"
    gradeFile=$gradeDir/${login}.grade
    total=0

    if [ -f $gradeFile ]
    then
      total=`genGrade $assignName $maxValue $gradeDir $login`
    fi

    echo "${login}, $total" >> $summaryFile
  fi
done