# Makes tests

# Variables
FILTER=dist/lin.lua
FILES="tests/*.md"
VERBOSE=""
AST=false
CMD="sh $0"

# Prints help
echo_help () {
  echo "Usage:"
  echo "  $CMD [-vah] [FILES]"
  echo "Examples:"
  echo "  $CMD                  Tests for 'tests/*.md'"
  echo "  $CMD -v               Verbose tests for 'tests/*.md'"
  echo "  $CMD -a               Tests and AST for 'tests/*.md'"
  echo "  $CMD tests/fail*      Tests for 'tests/fail*'"
  echo "  $CMD -va tests/fail*  Verbose tests and AST for 'tests/fail*'"
  echo "  $CMD -h               Display this help"
  exit
}

# Obtains result as "pass" | "fail" | "diff" (AST doesn't match)
get_result () {
  result=$([[ $1 -ne 0 ]] && echo "fail" || echo "pass")
  if [ -f $2.json ]; then
    diff1=$(cat tmp.json | jq)
    diff2=$(cat $2.json | jq)
    difference=$(diff <( printf '%s\n' "$diff1" ) <( printf '%s\n' "$diff2" ))
    result=$([[ $? -eq 0 ]] && echo "pass" || echo "diff")
  fi
  echo $result
}

# Checks options
while getopts ':vah' opt; do
  case "$opt" in
    v) VERBOSE="--verbose" ; shift ;;
    a) AST=true ; shift ;;
    h) echo_help ;;
    ?) echo "ERROR: only -v, -a or -h is allowed" ; exit 1 ;;
  esac
done

# Checks for files
if [ $# -ne 0 ]; then
  for file in $*; do
    if [ ! -f $file ]; then
      echo "ERROR: '$file' is not a file; do '$CMD -h' for more info" ; exit 1
    fi
  done
  FILES=$*
fi

# Makes distribution bundle
sh scripts/make_dist.sh

# Does tests
clear && echo "🐾 Starting tests"
for file in $FILES; do
  echo "⚗️  $file:"
  expectation=${file:6:4}
  ast=$(pandoc $VERBOSE -L $FILTER -t json -o tmp.json $file)
  result=$(get_result $? $file)
  echo "  Expect: $expectation"
  echo "  Result: $result"
  [ "$VERBOSE" = "--verbose" ] && echo -e "$ast"
  [ "$AST" = true ] && pandoc -L $FILTER -t native $file
  rm tmp.json
done