#!/usr/bin/env bash
set -Eeuo pipefail
command_name=${0##*/}
: "${TEST_MOCK_LOG:?TEST_MOCK_LOG must identify the isolated test log}"
printf '%q' "$command_name" >>"$TEST_MOCK_LOG"
for argument in "$@"; do printf ' %q' "$argument" >>"$TEST_MOCK_LOG"; done
printf '\n' >>"$TEST_MOCK_LOG"
if [[ -n ${MOCK_FLOCK_CHANGE_TO:-} && -z ${MOCK_FLOCK_CHANGED_MARKER:-} && -f $MOCK_FLOCK_CHANGE_TO && -n ${WG_MANAGER_CONFIG:-} ]]; then
  cp -- "$MOCK_FLOCK_CHANGE_TO" "$WG_MANAGER_CONFIG"
  export MOCK_FLOCK_CHANGED_MARKER=1
fi
if [[ $# == 2 && $1 == -n && $2 =~ ^[0-9]+$ ]]; then
  [[ ${MOCK_FLOCK_BUSY:-0} == 1 ]] && exit 1
  [[ ${MOCK_FLOCK_FAIL:-0} == 1 ]] && exit 97
  exit 0
fi
if [[ $# -ge 3 && $1 == -n && $2 =~ ^[0-9]+$ && ( $3 == printf || $3 == cat ) ]]; then
  [[ ${MOCK_FLOCK_BUSY:-0} == 1 ]] && exit 1
  [[ ${MOCK_FLOCK_FAIL:-0} == 1 ]] && exit 97
  shift 2
  command "$@"
  exit $?
fi
if [[ $# == 1 && $1 =~ ^[0-9]+$ || $# == 2 && $1 == -s && $2 =~ ^[0-9]+$ ]]; then
  [[ ${MOCK_FLOCK_BUSY:-0} == 1 ]] && exit 1
  [[ ${MOCK_FLOCK_FAIL:-0} == 1 ]] && exit 97
  real_flock=${REAL_FLOCK:-}
  if [[ -z $real_flock ]]; then
    for candidate in /usr/bin/flock /bin/flock; do
      if [[ -x $candidate ]]; then real_flock=$candidate; break; fi
    done
  fi
  [[ -n $real_flock ]] || exit 98
  exec "$real_flock" "$@"
fi
if [[ $# -ge 2 && ( $1 == -s || $1 != -* ) && ${1#-} =~ ^[0-9]+$ || $1 == -s && ${2:-} =~ ^[0-9]+$ ]]; then
  [[ ${MOCK_FLOCK_BUSY:-0} == 1 ]] && exit 1
  [[ ${MOCK_FLOCK_FAIL:-0} == 1 ]] && exit 97
  real_flock=${REAL_FLOCK:-}
  if [[ -z $real_flock ]]; then
    for candidate in /usr/bin/flock /bin/flock; do
      if [[ -x $candidate ]]; then real_flock=$candidate; break; fi
    done
  fi
  [[ -n $real_flock ]] || exit 98
  exec "$real_flock" "$@"
fi
exit 99