#!/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=TestCase
has_sequent=no

[ -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
}

runtest() {
  srcdirs=`sourcedirs`
  hugspath=`echo $srcdirs | sed 's/ /:/g'`
  echo "$test" | hugs -w +q -98 -P:$hugspath "$hsfile" >"$lastoutput" 2>&1
}

validate() {
  runtest
  echo "The following differences were detected:" >"$output"
  if diff "$expected" "$lastoutput" >>"$output" ; then
    echo "Output agrees with reference output."
    markvalid
    echo "The output from the last run of the test agrees with the reference output:" >"$output"
    echo "" >>"$output"
    cat "$lastoutput" >>"$output"
  else 
    markinvalid
    echo "See diagnostic output for more info."
  fi
}

validatenew() {
  runtest
  mv "$lastoutput" "$expected"
  echo "This is the first time this test has been run." >"$output"
  echo "Using the following output as reference to test against in future runs." >>"$output"
  echo "" >>$output
  cat "$expected" >>"$output"
  cat "$output"
  markvalid
}

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 $cert. Re-running test."
    #echo ""
    #cat "$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... ##############################################################

test=`getattr test "$attr"`
assertion="$module.$test"
hsfile="`pfe file "$module" | sed "s/$module: //"`"
#echo "hsfile=$hsfile"
expected="$certpath/expected.txt"
lastoutput="$certpath/last.txt"

tmpdiff="$certsDir/diff$$"

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