set -e

# cd into script's directory
cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null
root=$(pwd)

REGEXS=()

while [[ $# -gt 0 ]]; do
  case $1 in
    -h|--help)
        cat <<EOF
USAGE: [flags] [test regexs...]
FLAGS
    --keep-tmp
    --verbose (-v)
    --help    (-h)
EOF
      exit 1
      ;;
    -v|--verbose)
      VERBOSE=1
      shift
      ;;
    --keep-tmp)
      KEEP_TMP=1
      shift
      ;;
    *)
      REGEXS+=("$1")
      shift
      ;;
  esac
done

TMPDIR="$(mktemp --tmpdir -d isle-tests.XXXXXX)"
if [ -z "$KEEP_TMP" ]; then trap 'rm -rf $TMPDIR' EXIT; fi

export TMPDIR
echo "tmp dir is $TMPDIR"

test_files=$(
    find ./cases -type f -name '*.sh' \
    | sed "s|^\./cases/||" \
    | grep -v entrypoint.sh \
    | sort -n
)

for r in "${REGEXS[@]}"; do
    test_files="$(echo "$test_files" | grep "$r")"
done

echo -e "number of tests: $(echo "$test_files" | wc -l)\n"
for file in $test_files; do
    echo "$file"

    [ -z "$VERBOSE" ] && output="$TMPDIR/$file.log" || output=/dev/stdout

    (
        export TMPDIR="$TMPDIR/$file.tmp"
        export XDG_RUNTIME_DIR="$TMPDIR/.run"
        export XDG_DATA_HOME="$TMPDIR/.data"

        mkdir -p "$TMPDIR" "$XDG_RUNTIME_DIR" "$XDG_DATA_HOME"
        cd "$TMPDIR"

        if ! $SHELL -e -x "$root/cases/$file" >"$output" 2>&1; then
            echo "$file FAILED"
            if [ -z "$VERBOSE" ]; then
                echo "output of test is as follows"
                echo "------------------------------"
                cat "$output"
                echo "------------------------------"
            fi
            exit 1
        fi
    )
done

echo -e '\nall tests succeeded!'