#!/bin/sh

BUILD_TYPE=
USE_COMPILER=
DESTINATION=
EXTRA_OPTIONS=
EXTRA_LINK_OPTIONS=
SKIP_TESTS=0
REBUILD=0

while [ $# -gt 0 ]; do
  case $1 in
    -H|--help)
      echo "Build script for C projects"
      echo ""
      echo "Usage:  ./build_and_test.sh [OPTIONS]"
      echo ""
      echo "  -H  --help          - Print this info"
      echo "  -t  --type          - Set build type:       debug, release"
      echo "  -c  --compiler      - Set compiler to use:  gcc, clang, msvc, emcc"
      echo "  -d  --destination   - Set destination path"
      echo "  -o  --options       - Set additional options for the compiler"
      echo "  -l  --link          - Set additional options for the linker"
      echo "  -S  --skip-tests    - Skip tests"
      echo "  -R  --rebuild       - Rebuild the whole project"
      echo ""
      exit 0
      ;;
    -t|--type)
      BUILD_TYPE=$2
      shift
      shift
      ;;
    -c|--compiler)
      USE_COMPILER="$2"
      shift
      shift
      ;;
    -d|--destination)
      DESTINATION="$2"
      shift
      shift
      ;;
    -o|--options)
      EXTRA_OPTIONS="$2"
      shift
      shift
      ;;
    -l|--link)
      EXTRA_LINK_OPTIONS="$2"
      shift
      shift
      ;;
    -S|--skip-tests)
      SKIP_TESTS=1
      shift
      ;;
    -R|--rebuild)
      REBUILD=1
      shift
      ;;
    *)
      echo "Unknown option $1"
      shift
      ;;
  esac
done

FOLDER=out_gcc
OS=Linux
COMPILE=gcc
OBJ_POSTFIX=.o
EXE_POSTFIX=
FLAGS=
FLAG_OBJ="-c -o "
FLAG_EXE="-o "
LINK_FLAGS="-lm -lX11 -lXi -lXcursor -lGL"

if    [ "$USE_COMPILER" = "gcc" ]; then
  FOLDER=out_gcc
  COMPILE=gcc
elif  [ "$USE_COMPILER" = "clang" ]; then
  FOLDER=out_clang
  COMPILE=clang
elif  [ "$USE_COMPILER" = "msvc" ]; then
  FOLDER=out_msvc
  COMPILE=cl.exe
  OBJ_POSTFIX=.obj
  FLAG_OBJ="-c -Fo"
  FLAG_EXE="-Fe"
elif  [ "$USE_COMPILER" = "emcc" ]; then
  FOLDER=out_emcc
  COMPILE=emcc
  EXE_POSTFIX=.js
  LINK_FLAGS="-sFULL_ES3=1"
elif  [ "$USE_COMPILER" != "" ]; then
  echo "Unknown C compiler"
  exit 1
fi

if [ "$DESTINATION" != "" ]; then
  FOLDER="$DESTINATION"
fi

if [ "$USE_COMPILER" != "" ]; then
  if command -v $COMPILE >/dev/null 2>&1; then
    echo "C compiler found"
  else
    echo "C compiler not found"
    exit 1
  fi
fi

if [ "$COMPILE" != "emcc" ]; then
  case $(uname | tr '[:upper:]' '[:lower:]') in
    *darwin*)
      OS=macOS
      if [ "$USE_COMPILER" = "" ]; then
        if    command -v clang >/dev/null 2>&1; then
          echo "C compiler found - Clang"
          COMPILE=clang
        elif  command -v gcc >/dev/null 2>&1; then
          echo "C compiler found - GCC"
        else
          echo "C compiler not found"
          exit 1
        fi
      fi
      ;;
    *msys*|*cygwin*|*mingw*|*nt*|*win*)
      OS=Windows
      EXE_POSTFIX=.exe
      if [ "$USE_COMPILER" = "" ]; then
        if    command -v cl.exe >/dev/null 2>&1; then
          echo "C compiler found - MSVC"
          COMPILE=cl.exe
          OBJ_POSTFIX=.obj
          FLAG_OBJ="-c -Fo"
          FLAG_EXE="-Fe"
        elif  command -v gcc >/dev/null 2>&1; then
          echo "C compiler found - GCC"
        elif  command -v clang >/dev/null 2>&1; then
          echo "C compiler found - Clang"
          COMPILE=clang
        else
          echo "C compiler not found"
          exit 1
        fi
      fi
      if [ "$COMPILE" = "cl.exe" ]; then
        LINK_FLAGS="Shlwapi.lib Advapi32.lib"
      else
        LINK_FLAGS="-lShlwapi -lAdvapi32"
      fi
      ;;
    *)
      if [ "$USE_COMPILER" = "" ]; then
        if    command -v gcc >/dev/null 2>&1; then
          echo "C compiler found - GCC"
        elif  command -v clang >/dev/null 2>&1; then
          echo "C compiler found - Clang"
          COMPILE=clang
        else
          echo "C compiler not found"
          exit 1
        fi
      fi
      ;;
  esac
fi

if [ "$COMPILE" = "gcc" ] || [ "$COMPILE" = "emcc" ]; then
  if    [ "$BUILD_TYPE" = "release" ]; then
    FLAGS="-O3 -DNDEBUG"
  elif  [ "$COMPILE" = "gcc" ] && [ "$OS" != "Windows" ]; then
    FLAGS="-O0 -fsanitize=undefined,address,leak"
  elif  [ "$OS" != "Windows" ] && [ "$COMPILE" != "emcc" ]; then
    FLAGS="-O0 -fsanitize=undefined,address"
  else
    FLAGS="-O0"
  fi
elif [ "$COMPILE" = "clang" ]; then
  if    [ "$BUILD_TYPE" = "release" ]; then
    FLAGS="-O3 -DNDEBUG"
  else
    FLAGS="-O0"
  fi
else
  if [ "$BUILD_TYPE" = "release" ]; then
    FLAGS="-O2 -DNDEBUG"
  else
    FLAGS="-Od"
  fi
fi

if [ "$EXTRA_OPTIONS" != "" ]; then
  FLAGS="$EXTRA_OPTIONS $FLAGS"
fi

if [ "$EXTRA_LINK_OPTIONS" != "" ]; then
  LINK_FLAGS="$EXTRA_LINK_OPTIONS $LINK_FLAGS"
fi

if [ ! -d "$FOLDER" ]; then
  mkdir "$FOLDER"
fi

echo ""
echo "Compiler options: $FLAGS"
echo "Link options:     $LINK_FLAGS"
echo ""

if  [ $REBUILD              -ne 0                            ] || \
    [ !                     -f  "$FOLDER/_dep${OBJ_POSTFIX}" ] || \
    [ "source/saw/_dep.c"   -nt "$FOLDER/_dep${OBJ_POSTFIX}" ]; then
  echo "Rebuild dependencies"
  $COMPILE ${FLAGS} \
    ${FLAG_OBJ}"$FOLDER/_dep${OBJ_POSTFIX}" \
    "source/saw/_dep.c"
  if [ $? -ne 0 ]; then
    exit 1
  fi
fi

echo "Build saw"
$COMPILE ${FLAGS} \
  ${FLAG_EXE}"$FOLDER/saw${EXE_POSTFIX}" \
  "$FOLDER/_dep${OBJ_POSTFIX}" \
  "source/saw/_exe.c" \
  ${LINK_FLAGS}
if [ $? -ne 0 ]; then
  exit 1
fi

if [ $SKIP_TESTS -ne 0 ] || [ "$COMPILE" = "emcc" ]; then
  exit 0
fi

echo "Build test suite"
$COMPILE $FLAGS \
  $FLAG_EXE"$FOLDER/test_suite$EXE_POSTFIX" \
  "source/tests/_exe.c" \
  $LINK_FLAGS
if [ $? -ne 0 ]; then
  exit 1
fi

echo "Run tests"
echo ""

STATUS=0

$FOLDER/test_suite
if [ $? -ne 0 ]; then
  STATUS=1
fi

exit $STATUS