#!/usr/bin/env bash
set -euo pipefail

: "${PERSIST_MOCK_LOG:=/tmp/persist-mock.log}"
: "${PERSIST_MOCK_FAIL:=0}"
: "${PERSIST_MOCK_DELAY_SECS:=0}"
: "${PERSIST_MOCK_ACTIVE_DIR:=}"
: "${PERSIST_MOCK_FAIL_ON_CONCURRENT:=0}"

printf '%s %s\n' "$(basename -- "$0")" "$*" >>"${PERSIST_MOCK_LOG}"

cleanup() {
  [[ -n ${PERSIST_MOCK_ACTIVE_DIR} ]] || return 0
  rmdir "${PERSIST_MOCK_ACTIVE_DIR}" 2>/dev/null || true
}

if [[ -n ${PERSIST_MOCK_ACTIVE_DIR} ]]; then
  if ! mkdir "${PERSIST_MOCK_ACTIVE_DIR}" 2>/dev/null; then
    if [[ ${PERSIST_MOCK_FAIL_ON_CONCURRENT} == 1 ]]; then
      exit 1
    fi
  else
    trap cleanup EXIT
  fi
fi

if [[ ${PERSIST_MOCK_DELAY_SECS} != 0 ]]; then
  sleep "${PERSIST_MOCK_DELAY_SECS}"
fi

if [[ ${PERSIST_MOCK_FAIL} == 1 ]]; then
  exit 1
fi