#!/bin/bash

# omarchy:summary=Returns true when the laptop lid is closed
# omarchy:hidden=true

acpi_lid="${OMARCHY_ACPI_LID_PATH:-/proc/acpi/button/lid}"
input_class="${OMARCHY_INPUT_CLASS_PATH:-/sys/class/input}"

shopt -s nullglob
acpi_states=("$acpi_lid"/*/state)
input_switches=("$input_class"/*/capabilities/sw)
shopt -u nullglob

# An input device that reports a lid switch: SW_LID, bit 0 of the last word
# of its switch bitmap.
has_lid_switch() {
  local switches word
  local -a words

  for switches in "${input_switches[@]}"; do
    [[ -r $switches ]] || continue
    read -r -a words <"$switches" || true
    (( ${#words[@]} )) || continue
    word=${words[-1]}
    [[ $word =~ ^[0-9a-fA-F]+$ ]] || continue
    (( 16#$word & 1 )) && return 0
  done
  return 1
}

if (( ${#acpi_states[@]} )); then
  # An ACPI lid reports its own state.
  for state in "${acpi_states[@]}"; do
    [[ -r $state ]] || continue
    [[ $(<"$state") == *"closed"* ]] && exit 0
  done
elif has_lid_switch; then
  # Elsewhere (Apple Silicon's SMC, for one) only logind reads the switch. Ask
  # it only then: it answers "open" when it tracks no lid. This runs in sudo's
  # and polkit's PAM stack where fingerprint login is set up, so a stalled
  # logind must not hold up every sudo.
  lid_state=$(busctl --timeout=2 get-property org.freedesktop.login1 \
    /org/freedesktop/login1 org.freedesktop.login1.Manager LidClosed 2>/dev/null)
  [[ $lid_state == "b true" ]] && exit 0
fi

exit 1