#!/usr/bin/env bash
# One-shot hardware discovery for the Quickshell bar.
# Prints stable sysfs paths the QML side then reads directly via FileView,
# so no per-tick subprocess is needed. Output (one key per line):
#
#   TEMP <path to hwmon/thermal temp*_input>
#   BAT  <path to power_supply battery dir>
#
# Re-run only when hardware topology might change (rare); paths are stable
# across a boot.

set -u

# CPU package temperature sensor (coretemp / k10temp / zenpower ...).
discover_temp_input() {
	local hw name lbl base
	for hw in /sys/class/hwmon/hwmon*; do
		name=$(cat "$hw/name" 2>/dev/null) || continue
		case "$name" in
			coretemp|k10temp|zenpower)
				# Prefer the package/Tctl/Tdie label if present.
				for lbl in "$hw"/temp*_label; do
					[ -e "$lbl" ] || continue
					case "$(cat "$lbl" 2>/dev/null)" in
						"Package id 0"|Tctl|Tdie)
							base="${lbl%_label}"
							echo "${base}_input"
							return 0
							;;
					esac
				done
				[ -e "$hw/temp1_input" ] && { echo "$hw/temp1_input"; return 0; }
				;;
		esac
	done
	# Fallback: x86_pkg_temp thermal zone, else first thermal zone.
	local z t
	for z in /sys/class/thermal/thermal_zone*; do
		t=$(cat "$z/type" 2>/dev/null)
		[ "$t" = "x86_pkg_temp" ] && { echo "$z/temp"; return 0; }
	done
	[ -e /sys/class/thermal/thermal_zone0/temp ] && echo /sys/class/thermal/thermal_zone0/temp
}

# Main system battery (skip peripherals like wacom/mouse which set scope=Device).
discover_battery() {
	local ps t scope
	for ps in /sys/class/power_supply/*; do
		t=$(cat "$ps/type" 2>/dev/null)
		[ "$t" = "Battery" ] || continue
		scope=$(cat "$ps/scope" 2>/dev/null)
		[ "$scope" = "Device" ] && continue
		echo "$ps"
		return 0
	done
}

printf 'TEMP %s\n' "$(discover_temp_input)"
printf 'BAT %s\n' "$(discover_battery)"