#!/usr/bin/env bash
set -e
set -E
set -T

BATS_COUNT_ONLY=""
if [ "$1" = "-c" ]; then
  BATS_COUNT_ONLY=1
  shift
fi

BATS_EXTENDED_SYNTAX=""
if [ "$1" = "-x" ]; then
  BATS_EXTENDED_SYNTAX="$1"
  shift
fi

BATS_TEST_FILENAME="$1"
if [ -z "$BATS_TEST_FILENAME" ]; then
  echo "usage: bats-exec <filename>" >&2
  exit 1
elif [ ! -f "$BATS_TEST_FILENAME" ]; then
  echo "bats: $BATS_TEST_FILENAME does not exist" >&2
  exit 1
else
  shift
fi

BATS_TEST_DIRNAME="${BATS_TEST_FILENAME%/*}"
BATS_TEST_NAMES=()

load() {
  local name="$1"
  local filename

  if [ "${name:0:1}" = "/" ]; then
    filename="${name}"
  else
    filename="$BATS_TEST_DIRNAME/${name}.bash"
  fi

  if [[ ! -f "$filename" ]]; then
    echo "bats: $filename does not exist" >&2
    exit 1
  fi

  source "${filename}"
}

run() {
  local e E T oldIFS
  [[ ! "$-" =~ e ]] || e=1
  [[ ! "$-" =~ E ]] || E=1
  [[ ! "$-" =~ T ]] || T=1
  set +e
  set +E
  set +T
  output="$("$@" 2>&1)"
  status="$?"
  oldIFS=$IFS
  IFS=$'\n' lines=($output)
  [ -z "$e" ] || set -e
  [ -z "$E" ] || set -E
  [ -z "$T" ] || set -T
  IFS=$oldIFS
}

setup() {
  true
}

teardown() {
  true
}

skip() {
  BATS_TEST_SKIPPED=${1:-1}
  BATS_TEST_COMPLETED=1
  exit 0
}

bats_test_begin() {
  BATS_TEST_DESCRIPTION="$1"
  if [ -n "$BATS_EXTENDED_SYNTAX" ]; then
    echo "begin $BATS_TEST_NUMBER $BATS_TEST_DESCRIPTION" >&3
  fi
  setup
}

bats_test_function() {
  local test_name="$1"
  BATS_TEST_NAMES["${#BATS_TEST_NAMES[@]}"]="$test_name"
}

bats_capture_stack_trace() {
  BATS_PREVIOUS_STACK_TRACE=( "${BATS_CURRENT_STACK_TRACE[@]}" )
  BATS_CURRENT_STACK_TRACE=()

  local test_pattern=" $BATS_TEST_NAME $BATS_TEST_SOURCE"
  local setup_pattern=" setup $BATS_TEST_SOURCE"
  local teardown_pattern=" teardown $BATS_TEST_SOURCE"

  local frame
  local i

  for ((i=2; i != ${#FUNCNAME[@]}; ++i)); do
    frame="${BASH_LINENO[$((i-1))]} ${FUNCNAME[$i]} ${BASH_SOURCE[$i]}"
    BATS_CURRENT_STACK_TRACE["${#BATS_CURRENT_STACK_TRACE[@]}"]="$frame"
    if [[ "$frame" = *"$test_pattern"     || \
          "$frame" = *"$setup_pattern"    || \
          "$frame" = *"$teardown_pattern" ]]; then
      break
    fi
  done

  bats_frame_filename "${BATS_CURRENT_STACK_TRACE[0]}" 'BATS_SOURCE'
  bats_frame_lineno "${BATS_CURRENT_STACK_TRACE[0]}" 'BATS_LINENO'
}

bats_print_stack_trace() {
  local frame
  local index=1
  local count="${#@}"
  local filename
  local lineno

  for frame in "$@"; do
    bats_frame_filename "$frame" 'filename'
    bats_trim_filename "$filename" 'filename'
    bats_frame_lineno "$frame" 'lineno'

    if [ $index -eq 1 ]; then
      echo -n "# ("
    else
      echo -n "#  "
    fi

    local fn
    bats_frame_function "$frame" 'fn'
    if [ "$fn" != "$BATS_TEST_NAME" ]; then
      echo -n "from function \`$fn' "
    fi

    if [ $index -eq $count ]; then
      echo "in test file $filename, line $lineno)"
    else
      echo "in file $filename, line $lineno,"
    fi

    let index+=1
  done
}

bats_print_failed_command() {
  local frame="$1"
  local status="$2"
  local filename
  local lineno
  local failed_line
  local failed_command

  bats_frame_filename "$frame" 'filename'
  bats_frame_lineno "$frame" 'lineno'
  bats_extract_line "$filename" "$lineno" 'failed_line'
  bats_strip_string "$failed_line" 'failed_command'
  printf '%s' "#   \`${failed_command}' "

  if [ $status -eq 1 ]; then
    echo "failed"
  else
    echo "failed with status $status"
  fi
}

bats_frame_lineno() {
  printf -v "$2" '%s' "${1%% *}"
}

bats_frame_function() {
  local __bff_function="${1#* }"
  printf -v "$2" '%s' "${__bff_function%% *}"
}

bats_frame_filename() {
  local __bff_filename="${1#* }"
  __bff_filename="${__bff_filename#* }"

  if [ "$__bff_filename" = "$BATS_TEST_SOURCE" ]; then
    __bff_filename="$BATS_TEST_FILENAME"
  fi
  printf -v "$2" '%s' "$__bff_filename"
}

bats_extract_line() {
  local __bats_extract_line_line
  local __bats_extract_line_index='0'

  while IFS= read -r __bats_extract_line_line; do
    if [[ "$((++__bats_extract_line_index))" -eq "$2" ]]; then
      printf -v "$3" '%s' "${__bats_extract_line_line%$'\r'}"
      break
    fi
  done <"$1"
}

bats_strip_string() {
  [[ "$1" =~ ^[[:space:]]*(.*)[[:space:]]*$ ]]
  printf -v "$2" '%s' "${BASH_REMATCH[1]}"
}

bats_trim_filename() {
  if [[ "$1" =~ ^${BATS_CWD}/ ]]; then
    printf -v "$2" '%s' "${1#$BATS_CWD/}"
  else
    printf -v "$2" '%s' "$1"
  fi
}

bats_debug_trap() {
  if [ "$BASH_SOURCE" != "$1" ]; then
    bats_capture_stack_trace
  fi
}

# When running under Bash 3.2.57(1)-release on macOS, the `ERR` trap may not
# always fire, but the `EXIT` trap will. For this reason we call it at the very
# beginning of `bats_teardown_trap` (the `DEBUG` trap for the call will move
# `BATS_CURRENT_STACK_TRACE` to `BATS_PREVIOUS_STACK_TRACE`) and check the value
# of `$?` before taking other actions.
bats_error_trap() {
  local status="$?"
  if [[ "$status" -ne '0' ]]; then
    BATS_ERROR_STATUS="$status"
    BATS_ERROR_STACK_TRACE=( "${BATS_PREVIOUS_STACK_TRACE[@]}" )
    trap - debug
  fi
}

bats_teardown_trap() {
  bats_error_trap
  trap "bats_exit_trap" exit
  local status=0
  teardown >>"$BATS_OUT" 2>&1 || status="$?"

  if [ $status -eq 0 ]; then
    BATS_TEARDOWN_COMPLETED=1
  elif [ -n "$BATS_TEST_COMPLETED" ]; then
    BATS_ERROR_STATUS="$status"
    BATS_ERROR_STACK_TRACE=( "${BATS_CURRENT_STACK_TRACE[@]}" )
  fi

  bats_exit_trap
}

bats_exit_trap() {
  local status
  local skipped
  trap - err exit

  if [ -n "$BATS_TEST_SKIPPED" ]; then
    skipped=" # skip"
    if [ "1" != "$BATS_TEST_SKIPPED" ]; then
      skipped+=" $BATS_TEST_SKIPPED"
    fi
  fi

  if [ -z "$BATS_TEST_COMPLETED" ] || [ -z "$BATS_TEARDOWN_COMPLETED" ]; then
    echo "not ok $BATS_TEST_NUMBER $BATS_TEST_DESCRIPTION" >&3
    bats_print_stack_trace "${BATS_ERROR_STACK_TRACE[@]}" >&3
    bats_print_failed_command "${BATS_ERROR_STACK_TRACE[${#BATS_ERROR_STACK_TRACE[@]}-1]}" "$BATS_ERROR_STATUS" >&3
    sed -e "s/^/# /" < "$BATS_OUT" >&3
    status=1
  else
    echo "ok ${BATS_TEST_NUMBER} ${BATS_TEST_DESCRIPTION}${skipped}" >&3
    status=0
  fi

  rm -f "$BATS_OUT"
  exit "$status"
}

bats_perform_tests() {
  echo "1..$#"
  test_number=1
  status=0
  for test_name in "$@"; do
    "$0" $BATS_EXTENDED_SYNTAX "$BATS_TEST_FILENAME" "$test_name" "$test_number" || status=1
    let test_number+=1
  done
  exit "$status"
}

bats_perform_test() {
  BATS_TEST_NAME="$1"
  if declare -F "$BATS_TEST_NAME" >/dev/null; then
    BATS_TEST_NUMBER="$2"
    if [ -z "$BATS_TEST_NUMBER" ]; then
      echo "1..1"
      BATS_TEST_NUMBER="1"
    fi

    BATS_TEST_COMPLETED=""
    BATS_TEARDOWN_COMPLETED=""
    trap "bats_debug_trap \"\$BASH_SOURCE\"" debug
    trap "bats_error_trap" err
    trap "bats_teardown_trap" exit
    "$BATS_TEST_NAME" >>"$BATS_OUT" 2>&1
    BATS_TEST_COMPLETED=1

  else
    echo "bats: unknown test name \`$BATS_TEST_NAME'" >&2
    exit 1
  fi
}

if [ -z "$TMPDIR" ]; then
  BATS_TMPDIR="/tmp"
else
  BATS_TMPDIR="${TMPDIR%/}"
fi

BATS_TMPNAME="$BATS_TMPDIR/bats.$$"
BATS_PARENT_TMPNAME="$BATS_TMPDIR/bats.$PPID"
BATS_OUT="${BATS_TMPNAME}.out"

bats_preprocess_source() {
  BATS_TEST_SOURCE="${BATS_TMPNAME}.src"
  . bats-preprocess <<< "$(< "$BATS_TEST_FILENAME")"$'\n' > "$BATS_TEST_SOURCE"
  trap "bats_cleanup_preprocessed_source" err exit
  trap "bats_cleanup_preprocessed_source; exit 1" int
}

bats_cleanup_preprocessed_source() {
  rm -f "$BATS_TEST_SOURCE"
}

bats_evaluate_preprocessed_source() {
  if [ -z "$BATS_TEST_SOURCE" ]; then
    BATS_TEST_SOURCE="${BATS_PARENT_TMPNAME}.src"
  fi
  source "$BATS_TEST_SOURCE"
}

exec 3<&1

if [ "$#" -eq 0 ]; then
  bats_preprocess_source
  bats_evaluate_preprocessed_source

  if [ -n "$BATS_COUNT_ONLY" ]; then
    echo "${#BATS_TEST_NAMES[@]}"
  else
    bats_perform_tests "${BATS_TEST_NAMES[@]}"
  fi
else
  bats_evaluate_preprocessed_source
  bats_perform_test "$@"
fi