#!/bin/bash

BUILD_TYPE="debug"
COMPONENTS="all"

function join_array {
  DELIM="$1"
  shift
  local IFS="$DELIM"
  echo "$*"
}

SUPPORTED_COMPONENTS=("all" "testing" "core")
COMPONENTS_STRING="$(join_array "|" ${SUPPORTED_COMPONENTS[@]})"

while [[ $# > 0 ]];do
  case $1 in
    --release)
      BUILD_TYPE="release"
      shift
      ;;
    --components)
      COMPONENTS="$2"
      shift
      shift
      ;;
    *|-*|--*)
      echo "Unknown option $1"
      echo "Usage: $0 [--release] [--components $COMPONENTS_STRING (Default: all)]"
      exit 1
      ;;
  esac
done

CC=clang
CFLAGS="-Wall -Wextra -Werror -pedantic"
LIBFLAGS="-fPIC -shared"
KERNEL="$(uname -s)"
MACHINE="$(uname -m)"
PLATFORM="${KERNEL}_${MACHINE}"

if [[ $CC == "gcc" ]]; then
  # Used to disable the "ASan runtime does not come first in initial library list" error when compiling with gcc
  export ASAN_OPTIONS=verify_asan_link_order=0
fi

case $COMPONENTS in
  all)
    SRC="src/wapp.c"
    ;;
  testing)
    SRC="src/testing/wapp_testing.c"
    ;;
  core)
    SRC="src/core/wapp_core.c"
    ;;
  *)
    echo "Unrecognised option for components: $COMPONENTS"
    echo "Accepted options: $COMPONENTS_STRING"
    exit 2
    ;;
esac

# Run code generation
(set -x ; python3 -m codegen)

TEST_INCLUDE="-Isrc $(find tests -type d | xargs -I{} echo -n "-I{} ")"
TEST_SRC="$(find tests -type f -name "*.c" | xargs -I{} echo -n "{} ")"

BUILD_DIR="libwapp-build/$PLATFORM-$BUILD_TYPE"
if [[ -d $BUILD_DIR ]]; then
  rm -rf $BUILD_DIR
fi
mkdir -p $BUILD_DIR

if [[ $BUILD_TYPE == "release" ]]; then
  CFLAGS+=" -O3"
else
  CFLAGS+=" -g -fsanitize=address,undefined"
fi

OUT="$BUILD_DIR/libwapp.so"
TEST_OUT="$BUILD_DIR/wapptest"

# Compile tests
if [[ $(echo $TEST_SRC | xargs) != "" ]]; then
  (set -x ; $CC $CFLAGS $TEST_INCLUDE $SRC $TEST_SRC -o $TEST_OUT)
fi

# Run tests and exit on failure
if [[ -f $TEST_OUT ]]; then
  $TEST_OUT
  STATUS="$?"

  rm $TEST_OUT

  if [[ $STATUS != "0" ]]; then
    exit 1
  fi
fi

# Compile library
(set -x ; $CC $CFLAGS $LIBFLAGS $SRC -o $OUT)