#!/bin/sh
# SPDX-License-Identifier: AGPL-3.0-only
# Copyright 2022 Sxmo Contributors
# shellcheck source=scripts/core/sxmo_common.sh
. sxmo_common.sh

if [ "$1" = clear ]; then
	rm -f "$XDG_RUNTIME_DIR"/sxmo.multikey.count.*
	exit
fi

identifier="$1"
threshold="${SXMO_THRESHOLD:-0.15}"

# Fast path: when locked or screenoff, single/double/triple presses on power/pickup
# all wake and unlock the phone, so execute immediately without waiting 300ms.
STATE_FILE="${SXMO_STATE:-$XDG_RUNTIME_DIR/sxmo.state}"
if [ -r "$STATE_FILE" ]; then
	read -r cur_state < "$STATE_FILE" 2>/dev/null || cur_state=""
	if [ "$cur_state" != "unlock" ]; then
		case "$identifier" in
			powerbutton|pickup)
				rm -f "$XDG_RUNTIME_DIR"/sxmo.multikey.count."$identifier"
				exec sxmo_hook_inputhandler.sh "$2"
				;;
		esac
	fi
fi

count_file="$XDG_RUNTIME_DIR"/sxmo.multikey.count."$identifier"

if [ -f "$count_file" ]; then
	read -r old_counter < "$count_file" 2>/dev/null || old_counter=0
	counter="$((old_counter+1))"
else
	counter=1
fi

printf %s "$counter" > "$count_file"

shift "$counter"
if [ "$#" -eq 0 ]; then
	exit
fi

sleep "$threshold"

read -r new_counter < "$count_file" 2>/dev/null || new_counter="$counter"
if [ "$counter" != "$new_counter" ] && [ "$#" -ne 1 ]; then # Only the last count can overflow
	exit
fi

eval sxmo_hook_inputhandler.sh "$1" &

if [ "$counter" != "$new_counter" ]; then # overflowed
	sleep "$threshold"
	sleep "$threshold"
fi

rm -f "$count_file"