#!/bin/sh

. /usr/share/libubox/jshn.sh

CONFIG="zigbee2mqtt"
SERVICE="/etc/init.d/zigbee2mqtt"
CTL="/usr/sbin/zigbee2mqttctl"

load_config() {
	json_init
	json_add_string "serial_port" "$(uci -q get ${CONFIG}.main.serial_port || echo /dev/ttyACM0)"
	json_add_string "mqtt_host" "$(uci -q get ${CONFIG}.main.mqtt_host || echo mqtt://127.0.0.1:1883)"
	json_add_string "mqtt_username" "$(uci -q get ${CONFIG}.main.mqtt_username || printf '')"
	json_add_string "mqtt_password" "$(uci -q get ${CONFIG}.main.mqtt_password || printf '')"
	json_add_string "base_topic" "$(uci -q get ${CONFIG}.main.base_topic || echo zigbee2mqtt)"
	json_add_string "frontend_port" "$(uci -q get ${CONFIG}.main.frontend_port || echo 8080)"
	json_add_string "channel" "$(uci -q get ${CONFIG}.main.channel || echo 11)"
	json_add_string "data_path" "$(uci -q get ${CONFIG}.main.data_path || echo /srv/zigbee2mqtt)"
	json_add_string "image" "$(uci -q get ${CONFIG}.main.image || echo ghcr.io/koenkk/zigbee2mqtt:latest)"
	json_add_string "timezone" "$(uci -q get ${CONFIG}.main.timezone || echo UTC)"
	json_add_boolean "enabled" "$( [ "$(uci -q get ${CONFIG}.main.enabled || echo 0)" = "1" ] && echo 1 || echo 0)"
}

diagnostics() {
	local serial="$(uci -q get ${CONFIG}.main.serial_port || echo /dev/ttyACM0)"
	json_add_object "diagnostics"
	json_add_boolean "cgroups" "$( [ -d /sys/fs/cgroup ] && echo 1 || echo 0 )"
	json_add_boolean "docker" "$( command -v docker >/dev/null 2>&1 && docker info >/dev/null 2>&1 && echo 1 || echo 0 )"
	json_add_boolean "serial_device" "$( [ -c "$serial" ] && echo 1 || echo 0 )"
	json_add_boolean "usb_module" "$( lsmod 2>/dev/null | grep -q 'cdc_acm' && echo 1 || echo 0 )"
	json_add_boolean "service_file" "$( [ -x "$SERVICE" ] && echo 1 || echo 0 )"
	json_close_object
}

status() {
	json_init
	load_config
	json_add_object "service"
	json_add_boolean "enabled" "$( "$SERVICE" enabled >/dev/null 2>&1 && echo 1 || echo 0 )"
	json_add_boolean "running" "$( "$SERVICE" status >/dev/null 2>&1 && echo 1 || echo 0 )"
	json_close_object
	diagnostics
	json_add_array "container"
	docker ps -a --filter "name=secbx-zigbee2mqtt" --format '{{.Names}}|{{.Status}}' 2>/dev/null | while IFS='|' read -r name st; do
		json_add_object
		json_add_string "name" "$name"
		json_add_string "status" "$st"
		json_close_object
	done
	json_close_array
	json_dump
}

apply() {
	read input
	json_load "$input"
	json_get_var serial_port serial_port
	json_get_var mqtt_host mqtt_host
	json_get_var mqtt_username mqtt_username
	json_get_var mqtt_password mqtt_password
	json_get_var base_topic base_topic
	json_get_var frontend_port frontend_port
	json_get_var channel channel
	json_get_var data_path data_path
	json_get_var image image
	json_get_var timezone timezone
	json_get_var enabled enabled

	[ -n "$serial_port" ] && uci set ${CONFIG}.main.serial_port="$serial_port"
	[ -n "$mqtt_host" ] && uci set ${CONFIG}.main.mqtt_host="$mqtt_host"
	[ -n "$mqtt_username" ] && uci set ${CONFIG}.main.mqtt_username="$mqtt_username"
	[ -n "$mqtt_password" ] && uci set ${CONFIG}.main.mqtt_password="$mqtt_password"
	[ -n "$base_topic" ] && uci set ${CONFIG}.main.base_topic="$base_topic"
	[ -n "$frontend_port" ] && uci set ${CONFIG}.main.frontend_port="$frontend_port"
	[ -n "$channel" ] && uci set ${CONFIG}.main.channel="$channel"
	[ -n "$data_path" ] && uci set ${CONFIG}.main.data_path="$data_path"
	[ -n "$image" ] && uci set ${CONFIG}.main.image="$image"
	[ -n "$timezone" ] && uci set ${CONFIG}.main.timezone="$timezone"
	[ -n "$enabled" ] && uci set ${CONFIG}.main.enabled="$enabled"
	uci commit ${CONFIG}

	if [ "$enabled" = "1" ]; then
		"$SERVICE" enable >/dev/null 2>&1
	else
		"$SERVICE" disable >/dev/null 2>&1
	fi

	"$SERVICE" restart >/dev/null 2>&1

	json_init
	json_add_boolean "success" 1
	json_dump
}

logs() {
	read input
	json_load "$input"
	json_get_var tail tail
	tail=${tail:-200}
	json_init
	json_add_array "lines"
	$CTL logs --tail "$tail" 2>&1 | while IFS= read -r line; do
		json_add_string "" "$line"
	done
	json_close_array
	json_dump
}

control() {
	read input
	json_load "$input"
	json_get_var action action
	case "$action" in
		start) "$SERVICE" start ;;
		stop) "$SERVICE" stop ;;
		restart) "$SERVICE" restart ;;
		*) json_init; json_add_boolean "success" 0; json_add_string "error" "invalid action"; json_dump; return ;;
	esac
	json_init
	json_add_boolean "success" 1
	json_dump
}

update() {
	$CTL update >/dev/null 2>&1
	json_init
	json_add_boolean "success" 1
	json_dump
}

run_helper() {
	local command="$1"
	shift
	local output
	output=$("$CTL" "$command" "$@" 2>&1)
	local rc=$?
	json_init
	if [ "$rc" -eq 0 ]; then
		json_add_boolean "success" 1
	else
		json_add_boolean "success" 0
	fi
	[ -n "$output" ] && json_add_string "output" "$output"
	json_dump
}

install() {
	run_helper install
}

check() {
	run_helper check
}

case "$1" in
	list)
		cat <<'JSON'
{
	"status": {},
	"apply": {},
	"logs": {},
	"control": {},
	"update": {},
	"install": {},
	"check": {}
}
JSON
	;;
	call)
		case "$2" in
			status) status ;;
			apply) apply ;;
			logs) logs ;;
			control) control ;;
			update) update ;;
			install) install ;;
			check) check ;;
			*) json_init; json_add_string "error" "unknown method"; json_dump ;;
		esac
		;;
esac