#!/bin/bash

# omarchy:summary=Returns true when running on a laptop (has a lid or laptop chassis).

acpi_lid="${OMARCHY_ACPI_LID_PATH:-/proc/acpi/button/lid}"
input_class="${OMARCHY_INPUT_CLASS_PATH:-/sys/class/input}"
dmi_chassis="${OMARCHY_DMI_CHASSIS_TYPE_PATH:-/sys/class/dmi/id/chassis_type}"

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

# A lid switch is the definitive signal for clamshell-capable hardware.
for state in "${acpi_states[@]}"; do
  [[ -e $state ]] && exit 0
done

# Without an ACPI lid (Apple Silicon, for one), any input device that reports a
# lid switch (SW_LID, bit 0 of its switch capabilities, the last word of the
# bitmap) counts. The switch's name varies: Apple's SMC input device carries
# the same name on a Mac mini, where it reports no lid.
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 )) && exit 0
done

# Fall back to the DMI chassis type for laptops that don't expose an ACPI lid
# button. 8=Portable 9=Laptop 10=Notebook 14=Sub Notebook 30=Tablet
# 31=Convertible 32=Detachable.
chassis_type=""
read -r chassis_type <"$dmi_chassis" 2>/dev/null || true
case $chassis_type in
8 | 9 | 10 | 14 | 30 | 31 | 32) exit 0 ;;
esac

exit 1