#!/bin/sh
# SecuBox Domoticz manager

CONFIG="domoticz"
CONTAINER="secbx-domoticz"
OPKG_UPDATED=0

usage() {
	cat <<'USAGE'
Usage: domoticzctl <command>

Commands:
  install         Install prerequisites, prepare directories, pull image
  check           Run prerequisite checks
  update          Pull new image and restart
  status          Show container status
  logs            Show container logs (use -f to follow)
  service-run     Internal: run container via procd
  service-stop    Stop container
USAGE
}

require_root() { [ "$(id -u)" -eq 0 ]; }

uci_get() { uci -q get ${CONFIG}.main.$1; }

defaults() {
	image="$(uci_get image || echo domoticz/domoticz:latest)"
	data_path="$(uci_get data_path || echo /srv/domoticz)"
	devices_path="$(uci_get devices_path || echo /srv/devices)"
	port="$(uci_get port || echo 8080)"
	timezone="$(uci_get timezone || echo UTC)"
}

ensure_dir() { [ -d "$1" ] || mkdir -p "$1"; }

ensure_packages() {
	for pkg in "$@"; do
		if ! opkg status "$pkg" >/dev/null 2>&1; then
			if [ "$OPKG_UPDATED" -eq 0 ]; then
				opkg update || return 1
				OPKG_UPDATED=1
			fi
			opkg install "$pkg" || return 1
		fi
	done
}

check_prereqs() {
	defaults
	ensure_dir "$data_path"
	[ -d /sys/fs/cgroup ] || { echo "[ERROR] /sys/fs/cgroup missing" >&2; return 1; }
	ensure_packages dockerd docker containerd
	/etc/init.d/dockerd enable >/dev/null 2>&1
	/etc/init.d/dockerd start >/dev/null 2>&1
}

pull_image() { defaults; docker pull "$image"; }

stop_container() { docker stop "$CONTAINER" >/dev/null 2>&1 || true; docker rm "$CONTAINER" >/dev/null 2>&1 || true; }

cmd_install() {
	require_root || { echo Root required >&2; exit 1; }
	check_prereqs || exit 1
	ensure_dir "$data_path/config"
	pull_image || exit 1
	uci set ${CONFIG}.main.enabled='1'
	uci commit ${CONFIG}
	/etc/init.d/domoticz enable
	echo "Domoticz prerequisites installed. Start with /etc/init.d/domoticz start"
}

cmd_check() { check_prereqs; echo "Prerequisite check completed."; }

cmd_update() {
	require_root || { echo Root required >&2; exit 1; }
	pull_image || exit 1
	/etc/init.d/domoticz restart
}

cmd_status() { docker ps -a --filter "name=$CONTAINER"; }

cmd_logs() { docker logs "$@" "$CONTAINER"; }

cmd_service_run() {
	require_root || { echo Root required >&2; exit 1; }
	check_prereqs || exit 1
	defaults
	stop_container
	local docker_args="--name $CONTAINER -p ${port}:8080 -v $data_path/config:/config"
	[ -d "$devices_path" ] && docker_args="$docker_args -v $devices_path:/devices"
	exec docker run --rm $docker_args -e TZ="$timezone" "$image"
}

cmd_service_stop() { require_root || { echo Root required >&2; exit 1; }; stop_container; }

case "${1:-}" in
	install) shift; cmd_install "$@" ;;
	check) shift; cmd_check "$@" ;;
	update) shift; cmd_update "$@" ;;
	status) shift; cmd_status "$@" ;;
	logs) shift; cmd_logs "$@" ;;
	service-run) shift; cmd_service_run "$@" ;;
	service-stop) shift; cmd_service_stop "$@" ;;
	help|--help|-h|'') usage ;;
	*) echo "Unknown command: $1" >&2; usage >&2; exit 1 ;;
esac