#!/bin/sh /etc/rc.common
# shellcheck disable=SC2034
# shellcheck disable=SC3043 # ash supports local

START=99
STOP=10
USE_PROCD=1

PRPLMESH_DIR=/usr/libexec/prplmesh
LOG_ROLL_INTERVAL_SECONDS=86400

mesh_enabled() {
	[ "$(uci -q get prplmesh.config.enabled)" = "1" ]
}

register_process() {
	local name="$1"; shift
	procd_open_instance "$name"
	procd_set_param command "$@"
	procd_set_param env PRPLMESH_DIR="$PRPLMESH_DIR"
	procd_set_param respawn 3600 5 5
	procd_set_param stdout 1
	procd_set_param stderr 1
	procd_close_instance
}

register_log_roller() {
	local helper="$PRPLMESH_DIR/scripts/prplmesh_utils.sh"

	procd_open_instance log-roller
	# shellcheck disable=SC2016
	procd_set_param command /bin/sh -c '
		helper=$1
		interval=$2
		while sleep "$interval"; do
			"$helper" roll_logs || logger -t prplmesh "log roll failed"
		done' sh "$helper" "$LOG_ROLL_INTERVAL_SECONDS"
	procd_set_param respawn 3600 5 5
	procd_set_param stdout 1
	procd_set_param stderr 1
	procd_close_instance
}

start_service() {
	local mode need_agent=1 need_controller=1 log_roller=1

	mesh_enabled || return 0

	# A standalone controller runs without local radios, a plain agent
	# without the controller; everything else keeps both.
	mode="$(uci -q get prplmesh.config.management_mode)"
	case "$mode" in
	Multi-AP-Controller) need_agent=0 ;;
	Multi-AP-Agent) need_controller=0 ;;
	esac

	[ -x "$PRPLMESH_DIR/bin/ieee1905_transport" ] || {
		logger -t prplmesh "ieee1905_transport is missing or not executable"
		return 1
	}

	# Log rotation is not worth keeping the mesh down for: run without
	# it when the helper is stripped from the image.
	[ -x "$PRPLMESH_DIR/scripts/prplmesh_utils.sh" ] || {
		logger -t prplmesh "log-roll helper is missing or not executable; log rotation disabled"
		log_roller=0
	}

	if [ "$need_controller" = 1 ]; then
		[ -x "$PRPLMESH_DIR/bin/beerocks_controller" ] || {
			logger -t prplmesh "beerocks_controller is missing or not executable"
			return 1
		}
	fi

	if [ "$need_agent" = 1 ]; then
		[ -x "$PRPLMESH_DIR/bin/beerocks_agent" ] || {
			logger -t prplmesh "beerocks_agent is missing or not executable"
			return 1
		}
		[ -n "$(uci -q get prplmesh.config.mandatory_interfaces)" ] || {
			logger -t prplmesh "mandatory_interfaces not set; agent left stopped"
			return 1
		}
	fi

	if [ "$log_roller" = 1 ] && [ ! -e /var/run/prplmesh.boot_roll ]; then
		# Prune previous-boot logs before the daemons open new ones: the
		# helper only deletes old rotations and signals running daemons,
		# and none of ours are up yet, so nothing is rotated out early.
		# Reload triggers re-enter start_service with the daemons up
		# (procd reload falls through to start), so stamp the roll as
		# done for this boot; /var/run is tmpfs and clears the stamp.
		"$PRPLMESH_DIR/scripts/prplmesh_utils.sh" roll_logs >/dev/null 2>&1 \
			|| logger -t prplmesh "startup log roll failed"
		touch /var/run/prplmesh.boot_roll
	fi

	register_process transport "$PRPLMESH_DIR/bin/ieee1905_transport"

	if [ "$log_roller" = 1 ]; then
		register_log_roller
	fi

	if [ "$need_controller" = 1 ]; then
		register_process controller "$PRPLMESH_DIR/bin/beerocks_controller"
	fi

	if [ "$need_agent" = 1 ]; then
		# hostapd recreates its control sockets on boot and on wireless
		# reloads, so wait for them under procd supervision instead of
		# failing the whole start on a transient race.
		# shellcheck disable=SC2016
		register_process agent /bin/sh -c '
			while :; do
				ok=1
				IFS=","
				for interface in $(uci -q get prplmesh.config.mandatory_interfaces); do
					unset IFS
					[ -n "$interface" ] || continue
					[ -S "/var/run/hostapd/$interface" ] || { ok=0; break; }
				done
				unset IFS
				[ "$ok" = 1 ] && break
				sleep 5
			done
			exec "$PRPLMESH_DIR/bin/beerocks_agent"'
	fi
}

service_triggers() {
	procd_add_reload_trigger prplmesh wireless network
}