#!/bin/bash
#
# return values of this script are:
#   0  success
# 128  a test failed
#  >0  the number of timed-out tests
# 255  parsing of parameters failed

set -e

if [ -f /proc/cpuinfo ]
then
  MAKE_JOBS=$(( ($(cat /proc/cpuinfo | grep -E '^processor[[:space:]]*:' | tail -n -1 | cut -d':' -f2) + 1) * 2 + 1 ))
else
  MAKE_JOBS=8
fi

ret=0
TEST_CFLAGS=""

_help()
{
  echo "Usage options for $(basename $0) [--with-cc=arg [other options]]"
  echo
  echo "Executing this script without any parameter will only run the default"
  echo "configuration that has automatically been determined for the"
  echo "architecture you're running."
  echo
  echo "    --with-cc=*             The compiler(s) to use for the tests"
  echo "                            This is an option that will be iterated."
  echo
  echo "    --test-vs-mtest=*       Run test vs. mtest for '*' operations."
  echo "                            Only the first of each options will be"
  echo "                            taken into account."
  echo
  echo "To be able to specify options a compiler has to be given with"
  echo "the option --with-cc=compilername"
  echo "All other options will be tested with all MP_xBIT configurations."
  echo
  echo "    --with-{m64,m32,mx32}   The architecture(s) to build and test"
  echo "                            for, e.g. --with-mx32."
  echo "                            This is an option that will be iterated,"
  echo "                            multiple selections are possible."
  echo "                            The mx32 architecture is not supported"
  echo "                            by clang and will not be executed."
  echo
  echo "    --cflags=*              Give an option to the compiler,"
  echo "                            e.g. --cflags=-g"
  echo "                            This is an option that will always be"
  echo "                            passed as parameter to CC."
  echo
  echo "    --make-option=*         Give an option to make,"
  echo "                            e.g. --make-option=\"-f makefile.shared\""
  echo "                            This is an option that will always be"
  echo "                            passed as parameter to make."
  echo
  echo "    --with-low-mp           Also build&run tests with -DMP_{8,16,32}BIT."
  echo
  echo "    --mtest-real-rand       Use real random data when running mtest."
  echo
  echo "    --with-valgrind"
  echo "    --with-valgrind=*       Run in valgrind (slow!)."
  echo
  echo "    --valgrind-options       Additional Valgrind options"
  echo "                             Some of the options like e.g.:"
  echo "                             --track-origins=yes add a lot of extra"
  echo "                             runtime and may trigger the 30 minutes"
  echo "                             timeout."
  echo
  echo "Godmode:"
  echo
  echo "    --all                   Choose all architectures and gcc and clang"
  echo "                            as compilers but does not run valgrind."
  echo
  echo "    --format                Runs the various source-code formatters"
  echo "                            and generators and checks if the sources"
  echo "                            are clean."
  echo
  echo "    -h"
  echo "    --help                  This message"
  echo
  echo "    -v"
  echo "    --version               Prints the version. It is just the number"
  echo "                            of git commits to this file, no deeper"
  echo "                            meaning attached"
  exit 0
}

_die()
{
  echo "error $2 while $1"
  if [ "$2" != "124" ]
  then
    exit 128
  else
    echo "assuming timeout while running test - continue"
    local _tail=""
    which tail >/dev/null && _tail="tail -n 1 test_${suffix}.log" && \
    echo "last line of test_"${suffix}".log was:" && $_tail && echo ""
    ret=$(( $ret + 1 ))
  fi
}

_make()
{
  echo -ne " Compile $1 $2"
  suffix=$(echo ${1}${2}  | tr ' ' '_')
  CC="$1" CFLAGS="$2 $TEST_CFLAGS" make -j$MAKE_JOBS $3 $MAKE_OPTIONS > /dev/null 2>gcc_errors_${suffix}.log
  errcnt=$(wc -l < gcc_errors_${suffix}.log)
  if [[ ${errcnt} -gt 1 ]]; then
    echo " failed"
    cat gcc_errors_${suffix}.log
    exit 128
  fi
}


_runtest()
{
  make clean > /dev/null
  _make "$1" "$2" "test_standalone"
  local _timeout=""
  which timeout >/dev/null && _timeout="timeout --foreground 90"
  echo -e "\rRun test $1 $2"
  $_timeout ./test > test_${suffix}.log || _die "running tests" $?
}

# This is not much more of a C&P of _runtest with a different timeout
# and the additional valgrind call.
# TODO: merge
_runvalgrind()
{
  make clean > /dev/null
  _make "$1" "$2" "test_standalone"
  local _timeout=""
  # 30 minutes? Yes. Had it at 20 minutes and the Valgrind run needed over 25 minutes.
  # A bit too close for comfort.
  which timeout >/dev/null && _timeout="timeout --foreground 1800"
  echo -e "\rRun test $1 $2 inside valgrind"
  $_timeout $VALGRIND_BIN $VALGRIND_OPTS ./test > test_${suffix}.log || _die "running tests" $?
}


_banner()
{
  echo "uname="$(uname -a)
  [[ "$#" != "0" ]] && (echo $1=$($1 -dumpversion)) || true
}

_exit()
{
  if [ "$ret" == "0" ]
  then
    echo "Tests successful"
  else
    echo "$ret tests timed out"
  fi

  exit $ret
}

ARCHFLAGS=""
COMPILERS=""
CFLAGS=""
WITH_LOW_MP=""
TEST_VS_MTEST=""
MTEST_RAND=""
# timed with an AMD A8-6600K
# 25 minutes
#VALGRIND_OPTS=" --track-origins=yes --leak-check=full --show-leak-kinds=all --error-exitcode=1 "
# 9 minutes (14 minutes with --test-vs-mtest=333333 --mtest-real-rand)
VALGRIND_OPTS=" --leak-check=full --show-leak-kinds=all --error-exitcode=1 "
#VALGRIND_OPTS=""
VALGRIND_BIN=""
CHECK_FORMAT=""

alive_pid=0

function kill_alive() {
  disown $alive_pid || true
  kill $alive_pid 2>/dev/null
}

function start_alive_printing() {
  [ "$alive_pid" == "0" ] || return 0;
  for i in `seq 1 10` ; do sleep 300 && echo "Tests still in Progress..."; done &
  alive_pid=$!
  trap kill_alive EXIT
}

while [ $# -gt 0 ];
do
  case $1 in
    "--with-m64" | "--with-m32" | "--with-mx32")
      ARCHFLAGS="$ARCHFLAGS ${1:6}"
    ;;
    --with-cc=*)
      COMPILERS="$COMPILERS ${1#*=}"
    ;;
    --cflags=*)
      CFLAGS="$CFLAGS ${1#*=}"
    ;;
    --valgrind-options=*)
      VALGRIND_OPTS="$VALGRIND_OPTS ${1#*=}"
    ;;
    --with-valgrind*)
      if [[ ${1#*d} != "" ]]
      then
        VALGRIND_BIN="${1#*=}"
      else
        VALGRIND_BIN="valgrind"
      fi
      start_alive_printing
    ;;
    --make-option=*)
      MAKE_OPTIONS="$MAKE_OPTIONS ${1#*=}"
    ;;
    --with-low-mp)
      WITH_LOW_MP="1"
    ;;
    --test-vs-mtest=*)
      TEST_VS_MTEST="${1#*=}"
      if ! [ "$TEST_VS_MTEST" -eq "$TEST_VS_MTEST" ] 2> /dev/null
      then
         echo "--test-vs-mtest Parameter has to be int"
         exit 255
      fi
      start_alive_printing
    ;;
    --mtest-real-rand)
      MTEST_RAND="-DLTM_MTEST_REAL_RAND"
    ;;
    --format)
      CHECK_FORMAT="1"
    ;;
    --all)
      COMPILERS="gcc clang"
      ARCHFLAGS="-m64 -m32 -mx32"
    ;;
    --help | -h)
      _help
    ;;
    --version | -v)
      echo $(git rev-list HEAD --count -- testme.sh) || echo "Unknown. Please run in original libtommath git repository."
      exit 0
    ;;
    *)
      echo "Ignoring option ${1}"
    ;;
  esac
  shift
done

function _check_git() {
  git update-index --refresh >/dev/null || true
  git diff-index --quiet HEAD -- . || ( echo "FAILURE: $*" && exit 1 )
}

if [[ "$CHECK_FORMAT" == "1" ]]
then
  make astyle
  _check_git "make astyle"
  make new_file
  _check_git "make format"
  perl helper.pl -a
  exit $?
fi

[[ "$VALGRIND_BIN" == "" ]] && VALGRIND_OPTS=""

# default to CC environment variable if no compiler is defined but some other options
if [[ "$COMPILERS" == "" ]] && [[ "$ARCHFLAGS$MAKE_OPTIONS$CFLAGS" != "" ]]
then
   COMPILERS="$CC"
# default to CC environment variable and run only default config if no option is given
elif [[ "$COMPILERS" == "" ]]
then
  _banner "$CC"
  if [[ "$VALGRIND_BIN" != "" ]]
  then
    _runvalgrind "$CC" ""
  else
    _runtest "$CC" ""
  fi
  _exit
fi


archflags=( $ARCHFLAGS )
compilers=( $COMPILERS )

# choosing a compiler without specifying an architecture will use the default architecture
if [ "${#archflags[@]}" == "0" ]
then
  archflags[0]=" "
fi

_banner

if [[ "$TEST_VS_MTEST" != "" ]]
then
   make clean > /dev/null
   _make "${compilers[0]} ${archflags[0]}" "$CFLAGS" "test"
   echo
   _make "gcc" "$MTEST_RAND" "mtest"
   echo
   echo "Run test vs. mtest for $TEST_VS_MTEST iterations"
   _timeout=""
   which timeout >/dev/null && _timeout="timeout --foreground 1800"
   $_timeout ./mtest/mtest $TEST_VS_MTEST | $VALGRIND_BIN $VALGRIND_OPTS  ./test > valgrind_test.log 2> test_vs_mtest_err.log
   retval=$?
   head -n 5 valgrind_test.log
   tail -n 2 valgrind_test.log
   exit $retval
fi

for i in "${compilers[@]}"
do
  if [ -z "$(which $i)" ]
  then
    echo "Skipped compiler $i, file not found"
    continue
  fi
  compiler_version=$(echo "$i="$($i -dumpversion))
  if [ "$compiler_version" == "clang=4.2.1" ]
  then
    # one of my versions of clang complains about some stuff in stdio.h and stdarg.h ...
    TEST_CFLAGS="-Wno-typedef-redefinition"
  else
    TEST_CFLAGS=""
  fi
  echo $compiler_version

  for a in "${archflags[@]}"
  do
    if [[ $(expr "$i" : "clang") -ne 0 && "$a" == "-mx32" ]]
    then
      echo "clang -mx32 tests skipped"
      continue
    fi
    if [[ "$VALGRIND_BIN" != "" ]]
    then
      _runvalgrind "$i $a" "$CFLAGS"
      [ "$WITH_LOW_MP" != "1" ] && continue
      _runvalgrind "$i $a" "-DMP_8BIT $CFLAGS"
      _runvalgrind "$i $a" "-DMP_16BIT $CFLAGS"
      _runvalgrind "$i $a" "-DMP_32BIT $CFLAGS"
    else
      _runtest "$i $a" "$CFLAGS"
      [ "$WITH_LOW_MP" != "1" ] && continue
      _runtest "$i $a" "-DMP_8BIT $CFLAGS"
      _runtest "$i $a" "-DMP_16BIT $CFLAGS"
      _runtest "$i $a" "-DMP_32BIT $CFLAGS"
    fi
  done
done

_exit