#!/sbin/openrc-run
# Copyright 2026 Calculate Linux Community
# Distributed under the terms of the GNU General Public License v2

description="AmneziaWG userspace daemon (amneziawg-go)"

confd="/etc/conf.d/amneziawg-go"

: "${AWG_QUICK:=yes}"
: "${AWG_CONFDIR:=/etc/amneziawg}"

IFNAME="${SVCNAME#*.}"

pidfile="/run/amneziawg-go.${IFNAME}.pid"
command="/usr/bin/amneziawg-go"
command_args="-f ${IFNAME}"
command_background="yes"

depend() {
	need net
	use dns
}

checkconfig() {
	if [[ ${IFNAME} == "${SVCNAME}" ]] || ! [[ ${IFNAME} =~ ^[a-zA-Z0-9_=+.-]{1,15}$ ]]; then
		eerror "This script cannot be called directly. Create a symlink named after the interface:"
		eerror "    ln -s /etc/init.d/amneziawg-go /etc/init.d/amneziawg-go.wg0"
		eerror "    /etc/init.d/amneziawg-go.wg0 start"
		return 1
	fi
	if [[ ! -e ${AWG_CONFDIR}/${IFNAME}.conf ]]; then
		eerror "Config file ${AWG_CONFDIR}/${IFNAME}.conf does not exist"
		return 1
	fi
	return 0
}

start_pre() {
	checkconfig || return 1
	if [[ ! -e /dev/net/tun ]]; then
		modprobe tun 2>/dev/null || true
	fi
	if [[ ! -e /dev/net/tun ]]; then
		eerror "/dev/net/tun is missing and the tun module failed to load"
		return 1
	fi
	if ip link show dev "${IFNAME}" >/dev/null 2>&1; then
		ewarn "${IFNAME} already exists, deleting before start"
		ip link delete dev "${IFNAME}" >/dev/null 2>&1 || true
	fi
	return 0
}

start_post() {
	[[ ${AWG_QUICK} == yes ]] || return 0
	local i=0
	while (( i < 50 )); do
		[[ -S /run/amneziawg/${IFNAME}.sock ]] && break
		sleep 0.1
		((i++))
	done
	if [[ ! -S /run/amneziawg/${IFNAME}.sock ]]; then
		eerror "amneziawg-go control socket /run/amneziawg/${IFNAME}.sock did not appear"
		return 1
	fi
	awg-quick up "${AWG_CONFDIR}/${IFNAME}.conf"
}

stop_pre() {
	[[ ${AWG_QUICK} == yes ]] || return 0
	awg-quick down "${AWG_CONFDIR}/${IFNAME}.conf" >/dev/null 2>&1 || true
	return 0
}