#!/bin/sh

# mlvwm-powerdown - Wrapper OS-specific implementations of sleep, reboot, and/or
# power off of the system
#
# There may be OS-specific configuration required

tool="$(basename "$0")"
os="$(uname -s)"

_usage() {
  echo "Usage: ${tool} [-s | -r | -p]"
  exit 1
}

_unsupported() {
  echo "${tool}: ${1} is not supported under ${os}."
  exit 1
}

_confirm() {
  mlvwm-confirm "${1}" "Are you sure you want to $(echo "${1}" | tr "[:upper:]" "[:lower:]") your computer?"
}

_sleep_now() {
  case "$os" in
    "OpenBSD")
      pgrep -q apmd && zzz
      ;;
    *)
      _unsupported "sleep"
      ;;
  esac
}

_reboot_now() {
  case "$os" in
    "OpenBSD"|"FreeBSD"|"Linux")
      _confirm "Restart" && shutdown -r now
      ;;
    *)
      _unsupported "reboot"
      ;;
  esac
}

_poweroff_now() {
  case "$os" in
    "OpenBSD"|"FreeBSD")
      _confirm "Shut Down" && shutdown -p now
      ;;
    "Linux")
      _confirm "Shut Down" && shutdown -P now
      ;;
    *)
      _unsupported "power off"
      ;;
  esac
}

case "$1" in
  "-s")
    _sleep_now
    ;;
  "-r")
    _reboot_now
    ;;
  "-p")
    _poweroff_now
    ;;
  *)
    _usage
    ;;
esac