#!/bin/sh

# Script to validate QuickCheck certificates.
# This script should be invoked from cert.
# It expects "$PROGRAMATICA", "$SERVERDIR" and "$certsDir" to be set.
# It also expects the name of a certificate on the command line.

type=QuickCheck

[ -n "$PROGRAMATICA" ] || { echo >&2 'Bug: $PROGRAMATICA is not set'; exit 1;}
. "$PROGRAMATICA/validation.sh"

tmpdir=slice

### Auxiliary functions ########################################################

sourcedirs() {
  subgraphfiles $module | grep -v ^hi/libs/ | while read path ; do
    dirname $path
  done | sort -u
}

getAttrWithDefault() {
  v="`getattr $1 $attr`"
  echo "${v:-$2}"
}

validate() {
  tmpmod="$tmpdir/$module.hs"
  pfe qcslice "$module.$conc"
  hugspath=:$SERVERDIR/lib # :$PROGRAMATICA/libs/Monads
  #srcdirs=`sourcedirs`
  #hugspath=$hugspath:`echo $srcdirs | sed 's/ /:/g'` # needed for 1st & 2nd ver
  #echo "hugspath=$hugspath"
  maxTest="`getAttrWithDefault maxTest 100`"
  maxFail="`getAttrWithDefault maxFail 1000`"
  qcverbose="`getAttrWithDefault verbose False`"
  # generators...?
  echo 'Test did not run' >"$output"
  echo "QC.testToStdout $maxTest $maxFail $qcverbose assert_$conc"
  echo "QC.testToStdout $maxTest $maxFail $qcverbose assert_$conc" | 
    ${HUGS-hugs} -w +q -98 -P$hugspath $tmpmod > "$output" # no interactive feedback
    #ghci -fglasgow-exts -package util -i$hugspath $tmpmod  > "$output"
  #rm -f $tmpmod
  if tail "$output" | grep -q "OK, passed " ; then  # not very reliable!!
    markvalid
  else 
    markinvalid
  fi
}

validatenew() {
  validate
}

revalidate() {
  if [ -s "$tmpdiff" ] ; then
    #echo "The following changes might affect the validity of"
    echo "There has been changes that might affect the validity of"
    echo "the $type certificate $cert."
    #echo ""
    #cat "$tmpdiff"
    echo ""
    validate
  elif [ "$attr" -nt "$certpath/valid" ] ; then
    echo "Certificate attributes have changed."
    validate
  else
    echo "There has been no changes affecting the validity of"
    echo "the $type certificate $cert. Marking it as still valid."
    datestamp valid $certpath $module
  fi
}

### Here we go... ##############################################################

tmpdiff="$certsDir/diff$$"

if [ -r "$deps" ] && pfe tadiff "$deps" "$assertion" >"$tmpdiff" ; then
  revalidate
else
  validatenew
fi
status=$?
rm -f "$tmpdiff"
exit $status