package com.geeksville.mesh.service

import android.annotation.SuppressLint
import android.app.Service
import android.content.Context
import android.content.Intent
import android.content.pm.ServiceInfo
import android.os.IBinder
import android.os.RemoteException
import androidx.core.app.ServiceCompat
import androidx.core.location.LocationCompat
import com.geeksville.mesh.analytics.DataPair
import com.geeksville.mesh.android.GeeksvilleApplication
import com.geeksville.mesh.android.Logging
import com.geeksville.mesh.concurrent.handledLaunch
import com.geeksville.mesh.*
import com.geeksville.mesh.LocalOnlyProtos.LocalConfig
import com.geeksville.mesh.LocalOnlyProtos.LocalModuleConfig
import com.geeksville.mesh.MeshProtos.MeshPacket
import com.geeksville.mesh.MeshProtos.RouteDiscovery
import com.geeksville.mesh.MeshProtos.ToRadio
import com.geeksville.mesh.android.hasLocationPermission
import com.geeksville.mesh.database.MeshLogRepository
import com.geeksville.mesh.database.PacketRepository
import com.geeksville.mesh.database.entity.MeshLog
import com.geeksville.mesh.database.entity.Packet
import com.geeksville.mesh.model.DeviceVersion
import com.geeksville.mesh.repository.datastore.RadioConfigRepository
import com.geeksville.mesh.repository.location.LocationRepository
import com.geeksville.mesh.repository.network.MQTTRepository
import com.geeksville.mesh.repository.radio.BluetoothInterface
import com.geeksville.mesh.repository.radio.RadioInterfaceService
import com.geeksville.mesh.repository.radio.RadioServiceConnectionState
import com.geeksville.mesh.util.*
import com.google.protobuf.ByteString
import com.google.protobuf.InvalidProtocolBufferException
import dagger.Lazy
import dagger.hilt.android.AndroidEntryPoint
import java8.util.concurrent.CompletableFuture
import kotlinx.coroutines.CancellationException
import kotlinx.coroutines.CoroutineScope
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.Job
import kotlinx.coroutines.delay
import kotlinx.coroutines.flow.catch
import kotlinx.coroutines.flow.launchIn
import kotlinx.coroutines.flow.onEach
import kotlinx.coroutines.withTimeoutOrNull
import java.util.*
import java.util.concurrent.ConcurrentLinkedQueue
import java.util.concurrent.TimeUnit
import java.util.concurrent.TimeoutException
import javax.inject.Inject
import kotlin.math.absoluteValue

/**
 * Handles all the communication with android apps.  Also keeps an internal model
 * of the network state.
 *
 * Note: this service will go away once all clients are unbound from it.
 * Warning: do not override toString, it causes infinite recursion on some androids (because contextWrapper.getResources calls to string
 */
@AndroidEntryPoint
class MeshService : Service(), Logging {
    @Inject
    lateinit var dispatchers: CoroutineDispatchers

    @Inject
    lateinit var packetRepository: Lazy<PacketRepository>

    @Inject
    lateinit var meshLogRepository: Lazy<MeshLogRepository>

    @Inject
    lateinit var radioInterfaceService: RadioInterfaceService

    @Inject
    lateinit var locationRepository: LocationRepository

    @Inject
    lateinit var radioConfigRepository: RadioConfigRepository

    @Inject
    lateinit var mqttRepository: MQTTRepository

    companion object : Logging {

        /// Intents broadcast by MeshService

        private fun actionReceived(portNum: String) = "$prefix.RECEIVED.$portNum"

        /// generate a RECEIVED action filter string that includes either the portnumber as an int, or preferably a symbolic name from portnums.proto
        fun actionReceived(portNum: Int): String {
            val portType = Portnums.PortNum.forNumber(portNum)
            val portStr = portType?.toString() ?: portNum.toString()

            return actionReceived(portStr)
        }

        const val ACTION_NODE_CHANGE = "$prefix.NODE_CHANGE"
        const val ACTION_MESH_CONNECTED = "$prefix.MESH_CONNECTED"
        const val ACTION_MESSAGE_STATUS = "$prefix.MESSAGE_STATUS"

        open class NodeNotFoundException(reason: String) : Exception(reason)
        class InvalidNodeIdException(id: String) : NodeNotFoundException("Invalid NodeId $id")
        class NodeNumNotFoundException(id: Int) : NodeNotFoundException("NodeNum not found $id")
        class IdNotFoundException(id: String) : NodeNotFoundException("ID not found $id")

        class NoDeviceConfigException(message: String = "No radio settings received (is our app too old?)") :
            RadioNotConnectedException(message)

        /**
         * Talk to our running service and try to set a new device address.  And then immediately
         * call start on the service to possibly promote our service to be a foreground service.
         */
        fun changeDeviceAddress(context: Context, service: IMeshService, address: String?) {
            service.setDeviceAddress(address)
            startService(context)
        }

        fun createIntent() = Intent().setClassName(
            "com.geeksville.mesh",
            "com.geeksville.mesh.service.MeshService"
        )

        /** The minimum firmware version we know how to talk to. We'll still be able
         * to talk to 2.0 firmwares but only well enough to ask them to firmware update.
         */
        val minDeviceVersion = DeviceVersion("2.3.2")
    }

    enum class ConnectionState {
        DISCONNECTED,
        CONNECTED,
        DEVICE_SLEEP // device is in LS sleep state, it will reconnected to us over bluetooth once it has data
    }

    private var previousSummary: String? = null

    /// A mapping of receiver class name to package name - used for explicit broadcasts
    private val clientPackages = mutableMapOf<String, String>()
    private val serviceNotifications = MeshServiceNotifications(this)
    private val serviceBroadcasts = MeshServiceBroadcasts(this, clientPackages) {
        connectionState.also { radioConfigRepository.setConnectionState(it) }
    }
    private val serviceJob = Job()
    private val serviceScope = CoroutineScope(Dispatchers.IO + serviceJob)
    private var connectionState = ConnectionState.DISCONNECTED

    private var locationFlow: Job? = null
    private var mqttMessageFlow: Job? = null

    private fun getSenderName(packet: DataPacket?): String {
        val name = nodeDBbyID[packet?.from]?.user?.longName
        return name ?: getString(R.string.unknown_username)
    }

    private val notificationSummary
        get() = when (connectionState) {
            ConnectionState.CONNECTED -> getString(R.string.connected_count).format(
                numOnlineNodes,
                numNodes
            )
            ConnectionState.DISCONNECTED -> getString(R.string.disconnected)
            ConnectionState.DEVICE_SLEEP -> getString(R.string.device_sleeping)
        }

    /**
     * start our location requests (if they weren't already running)
     */
    private fun startLocationRequests() {
        // If we're already observing updates, don't register again
        if (locationFlow?.isActive == true) return

        @SuppressLint("MissingPermission")
        if (hasLocationPermission()) {
            locationFlow = locationRepository.getLocations().onEach { location ->
                sendPosition(
                    position {
                        latitudeI = Position.degI(location.latitude)
                        longitudeI = Position.degI(location.longitude)
                        if (LocationCompat.hasMslAltitude(location)) {
                            altitude = LocationCompat.getMslAltitudeMeters(location).toInt()
                        }
                        altitudeHae = location.altitude.toInt()
                        time = (location.time / 1000).toInt()
                        groundSpeed = location.speed.toInt()
                        groundTrack = location.bearing.toInt()
                        locationSource = MeshProtos.Position.LocSource.LOC_EXTERNAL
                    }
                )
            }.launchIn(serviceScope)
        }
    }

    private fun stopLocationRequests() {
        if (locationFlow?.isActive == true) {
            info("Stopping location requests")
            locationFlow?.cancel()
            locationFlow = null
        }
    }

    /** Send a command/packet to our radio.  But cope with the possibility that we might start up
    before we are fully bound to the RadioInterfaceService
     */
    private fun sendToRadio(p: ToRadio.Builder) {
        val built = p.build()
        debug("Sending to radio ${built.toPIIString()}")
        val b = built.toByteArray()

        radioInterfaceService.sendToRadio(b)
        changeStatus(p.packet.id, MessageStatus.ENROUTE)

        if (p.packet.hasDecoded()) {
            val packetToSave = MeshLog(
                UUID.randomUUID().toString(),
                "Packet",
                System.currentTimeMillis(),
                p.packet.toString()
            )
            insertMeshLog(packetToSave)
        }
    }

    /**
     * Send a mesh packet to the radio, if the radio is not currently connected this function will throw NotConnectedException
     */
    private fun sendToRadio(packet: MeshPacket) {
        queuedPackets.add(packet)
        startPacketQueue()
    }

    private fun updateMessageNotification(dataPacket: DataPacket) {
        val message: String = when (dataPacket.dataType) {
            Portnums.PortNum.TEXT_MESSAGE_APP_VALUE -> dataPacket.text!!
            Portnums.PortNum.WAYPOINT_APP_VALUE -> {
                getString(R.string.waypoint_received, dataPacket.waypoint!!.name)
            }

            else -> return
        }
        serviceNotifications.updateMessageNotification(getSenderName(dataPacket), message)
    }

    override fun onCreate() {
        super.onCreate()

        info("Creating mesh service")

        // Switch to the IO thread
        serviceScope.handledLaunch {
            radioInterfaceService.connect()
        }
        radioInterfaceService.connectionState.onEach(::onRadioConnectionState)
            .launchIn(serviceScope)
        radioInterfaceService.receivedData.onEach(::onReceiveFromRadio)
            .launchIn(serviceScope)
        radioConfigRepository.localConfigFlow.onEach { localConfig = it }
            .launchIn(serviceScope)
        radioConfigRepository.moduleConfigFlow.onEach { moduleConfig = it }
            .launchIn(serviceScope)
        radioConfigRepository.channelSetFlow.onEach { channelSet = it }
            .launchIn(serviceScope)

        // the rest of our init will happen once we are in radioConnection.onServiceConnected
    }

    /**
     * If someone binds to us, this will be called after on create
     */
    override fun onBind(intent: Intent?): IBinder {
        return binder
    }

    /**
     * If someone starts us (or restarts us) this will be called after onCreate)
     */
    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
        val a = radioInterfaceService.getBondedDeviceAddress()
        val wantForeground = a != null && a != "n"

        info("Requesting foreground service=$wantForeground")

        // We always start foreground because that's how our service is always started (if we didn't then android would kill us)
        // but if we don't really need foreground we immediately stop it.
        val notification = serviceNotifications.createServiceStateNotification(notificationSummary)

        try {
            ServiceCompat.startForeground(
                this,
                serviceNotifications.notifyId,
                notification,
                if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.Q) {
                    if (hasLocationPermission()) {
                        ServiceInfo.FOREGROUND_SERVICE_TYPE_MANIFEST
                    } else {
                        ServiceInfo.FOREGROUND_SERVICE_TYPE_CONNECTED_DEVICE
                    }
                } else {
                    0
                },
            )
        } catch (ex: Exception) {
            errormsg("startForeground failed", ex)
            return START_NOT_STICKY
        }
        return if (!wantForeground) {
            ServiceCompat.stopForeground(this, ServiceCompat.STOP_FOREGROUND_REMOVE)
            START_NOT_STICKY
        } else {
            START_STICKY
        }
    }

    override fun onDestroy() {
        info("Destroying mesh service")

        // Make sure we aren't using the notification first
        ServiceCompat.stopForeground(this, ServiceCompat.STOP_FOREGROUND_REMOVE)
        serviceNotifications.close()

        super.onDestroy()
        serviceJob.cancel()
    }

    ///
    /// BEGINNING OF MODEL - FIXME, move elsewhere
    ///

    val myNodeInfo: MyNodeInfo? get() = radioConfigRepository.myNodeInfo.value

    private val configTotal by lazy { ConfigProtos.Config.getDescriptor().fields.size }
    private val moduleTotal by lazy { ModuleConfigProtos.ModuleConfig.getDescriptor().fields.size }
    private var sessionPasskey: ByteString = ByteString.EMPTY

    private var localConfig: LocalConfig = LocalConfig.getDefaultInstance()
    private var moduleConfig: LocalModuleConfig = LocalModuleConfig.getDefaultInstance()
    private var channelSet: AppOnlyProtos.ChannelSet = AppOnlyProtos.ChannelSet.getDefaultInstance()

    /// True after we've done our initial node db init
    @Volatile
    private var haveNodeDB = false

    // The database of active nodes, index is the node number
    private val nodeDBbyNodeNum get() = radioConfigRepository.nodeDBbyNum.value

    // The database of active nodes, index is the node user ID string
    // NOTE: some NodeInfos might be in only nodeDBbyNodeNum (because we don't yet know an ID).
    private val nodeDBbyID get() = nodeDBbyNodeNum.mapKeys { it.value.user?.id }

    ///
    /// END OF MODEL
    ///

    private val deviceVersion get() = DeviceVersion(myNodeInfo?.firmwareVersion ?: "")
    private val appVersion get() = BuildConfig.VERSION_CODE
    private val minAppVersion get() = myNodeInfo?.minAppVersion ?: 0

    /// Map a nodenum to a node, or throw an exception if not found
    private fun toNodeInfo(n: Int) = nodeDBbyNodeNum[n] ?: throw NodeNumNotFoundException(n)

    /** Map a nodeNum to the nodeId string
    If we have a NodeInfo for this ID we prefer to return the string ID inside the user record.
    but some nodes might not have a user record at all (because not yet received), in that case, we return
    a hex version of the ID just based on the number */
    private fun toNodeID(n: Int): String =
        if (n == DataPacket.NODENUM_BROADCAST) DataPacket.ID_BROADCAST
        else nodeDBbyNodeNum[n]?.user?.id ?: DataPacket.nodeNumToDefaultId(n)

    private fun defaultUser(num: Int) = MeshUser(
        id = DataPacket.nodeNumToDefaultId(num),
        longName = getString(R.string.unknown_username),
        shortName = getString(R.string.unknown_node_short_name),
        hwModel = MeshProtos.HardwareModel.UNSET,
    )

    // given a nodeNum, return a db entry - creating if necessary
    private fun getOrCreateNodeInfo(n: Int) = nodeDBbyNodeNum[n] ?: NodeInfo(n, defaultUser(n))

    private val hexIdRegex = """\!([0-9A-Fa-f]+)""".toRegex()
    private val rangeTestRegex = Regex("seq (\\d{1,10})")

    /// Map a userid to a node/ node num, or throw an exception if not found
    /// We prefer to find nodes based on their assigned IDs, but if no ID has been assigned to a node, we can also find it based on node number
    private fun toNodeInfo(id: String): NodeInfo {
        // If this is a valid hexaddr will be !null
        val hexStr = hexIdRegex.matchEntire(id)?.groups?.get(1)?.value

        return nodeDBbyID[id] ?: when {
            id == DataPacket.ID_LOCAL -> toNodeInfo(myNodeNum)
            hexStr != null -> {
                val n = hexStr.toLong(16).toInt()
                nodeDBbyNodeNum[n] ?: throw IdNotFoundException(id)
            }
            else -> throw InvalidNodeIdException(id)
        }
    }

    private fun getUserName(num: Int): String {
        val user = nodeDBbyNodeNum[num]?.user
        val longName = user?.longName ?: getString(R.string.unknown_username)
        val shortName = user?.shortName ?: DataPacket.nodeNumToDefaultId(num)
        return "$longName ($shortName)"
    }

    private val numNodes get() = nodeDBbyNodeNum.size

    /**
     * How many nodes are currently online (including our local node)
     */
    private val numOnlineNodes get() = nodeDBbyNodeNum.values.count { it.isOnline }

    private fun toNodeNum(id: String): Int = when (id) {
        DataPacket.ID_BROADCAST -> DataPacket.NODENUM_BROADCAST
        DataPacket.ID_LOCAL -> myNodeNum
        else -> toNodeInfo(id).num
    }

    /// A helper function that makes it easy to update node info objects
    private inline fun updateNodeInfo(
        nodeNum: Int,
        withBroadcast: Boolean = true,
        crossinline updateFn: (NodeInfo) -> Unit,
    ) {
        val info = getOrCreateNodeInfo(nodeNum)
        updateFn(info)

        // This might have been the first time we know an ID for this node, so also update the by ID map
        val userId = info.user?.id.orEmpty()
        if (userId.isNotEmpty()) {
            if (haveNodeDB) serviceScope.handledLaunch {
                radioConfigRepository.upsert(info)
            }
        }

        // parcelable is busted
        if (withBroadcast)
            serviceBroadcasts.broadcastNodeChange(info)
    }

    /// My node num
    private val myNodeNum
        get() = myNodeInfo?.myNodeNum
            ?: throw RadioNotConnectedException("We don't yet have our myNodeInfo")

    /// My node ID string
    private val myNodeID get() = toNodeID(myNodeNum)

    /// Admin channel index
    private val adminChannelIndex: Int
        get() = channelSet.settingsList.indexOfFirst { it.name.equals("admin", ignoreCase = true) }
            .coerceAtLeast(0)

    /// Generate a new mesh packet builder with our node as the sender, and the specified node num
    private fun newMeshPacketTo(idNum: Int) = MeshPacket.newBuilder().apply {
        if (myNodeInfo == null)
            throw RadioNotConnectedException()

        from = 0 // don't add myNodeNum

        to = idNum
    }

    /**
     * Generate a new mesh packet builder with our node as the sender, and the specified recipient
     *
     * If id is null we assume a broadcast message
     */
    private fun newMeshPacketTo(id: String) = newMeshPacketTo(toNodeNum(id))

    /**
     * Helper to make it easy to build a subpacket in the proper protobufs
     */
    private fun MeshPacket.Builder.buildMeshPacket(
        wantAck: Boolean = false,
        id: Int = generatePacketId(), // always assign a packet ID if we didn't already have one
        hopLimit: Int = localConfig.lora.hopLimit,
        channel: Int = 0,
        priority: MeshPacket.Priority = MeshPacket.Priority.UNSET,
        initFn: MeshProtos.Data.Builder.() -> Unit
    ): MeshPacket {
        this.wantAck = wantAck
        this.id = id
        this.hopLimit = hopLimit
        this.channel = channel
        this.priority = priority
        decoded = MeshProtos.Data.newBuilder().also {
            initFn(it)
        }.build()

        return build()
    }


    /**
     * Helper to make it easy to build a subpacket in the proper protobufs
     */
    private fun MeshPacket.Builder.buildAdminPacket(
        id: Int = generatePacketId(), // always assign a packet ID if we didn't already have one
        wantResponse: Boolean = false,
        initFn: AdminProtos.AdminMessage.Builder.() -> Unit
    ): MeshPacket = buildMeshPacket(
        id = id,
        wantAck = true,
        channel = adminChannelIndex,
        priority = MeshPacket.Priority.RELIABLE
    ) {
        this.wantResponse = wantResponse
        portnumValue = Portnums.PortNum.ADMIN_APP_VALUE
        payload = AdminProtos.AdminMessage.newBuilder().also {
            initFn(it)
            it.sessionPasskey = sessionPasskey
        }.build().toByteString()
    }

    /// Generate a DataPacket from a MeshPacket, or null if we didn't have enough data to do so
    private fun toDataPacket(packet: MeshPacket): DataPacket? {
        return if (!packet.hasDecoded()) {
            // We never convert packets that are not DataPackets
            null
        } else {
            val data = packet.decoded

            // If the rxTime was not set by the device (because device software was old), guess at a time
            val rxTime = if (packet.rxTime != 0) packet.rxTime else currentSecond()

            DataPacket(
                from = toNodeID(packet.from),
                to = toNodeID(packet.to),
                time = rxTime * 1000L,
                id = packet.id,
                dataType = data.portnumValue,
                bytes = data.payload.toByteArray(),
                hopLimit = packet.hopLimit,
                channel = if (packet.pkiEncrypted) DataPacket.PKC_CHANNEL_INDEX else packet.channel,
            )
        }
    }

    private fun toMeshPacket(p: DataPacket): MeshPacket {
        return newMeshPacketTo(p.to!!).buildMeshPacket(
            id = p.id,
            wantAck = true,
            hopLimit = p.hopLimit,
            channel = p.channel,
        ) {
            portnumValue = p.dataType
            payload = ByteString.copyFrom(p.bytes)
        }
    }

    private val rememberDataType = setOf(
        Portnums.PortNum.TEXT_MESSAGE_APP_VALUE,
        Portnums.PortNum.WAYPOINT_APP_VALUE,
    )

    private fun rememberDataPacket(dataPacket: DataPacket, updateNotification: Boolean = true) {
        if (dataPacket.dataType !in rememberDataType) return
        val fromLocal = dataPacket.from == DataPacket.ID_LOCAL
        val toBroadcast = dataPacket.to == DataPacket.ID_BROADCAST
        val contactId = if (fromLocal || toBroadcast) dataPacket.to else dataPacket.from

        // contactKey: unique contact key filter (channel)+(nodeId)
        val contactKey = "${dataPacket.channel}$contactId"

        val packetToSave = Packet(
            0L, // autoGenerated
            myNodeNum,
            dataPacket.dataType,
            contactKey,
            System.currentTimeMillis(),
            fromLocal,
            dataPacket
        )
        serviceScope.handledLaunch {
            packetRepository.get().apply {
                insert(packetToSave)
                val isMuted = getContactSettings(contactKey).isMuted
                if (updateNotification && !isMuted) updateMessageNotification(dataPacket)
            }
        }
    }

    /// Update our model and resend as needed for a MeshPacket we just received from the radio
    private fun handleReceivedData(packet: MeshPacket) {
        myNodeInfo?.let { myInfo ->
            val data = packet.decoded
            val bytes = data.payload.toByteArray()
            val fromId = toNodeID(packet.from)
            val dataPacket = toDataPacket(packet)

            if (dataPacket != null) {

                // We ignore most messages that we sent
                val fromUs = myInfo.myNodeNum == packet.from

                debug("Received data from $fromId, portnum=${data.portnum} ${bytes.size} bytes")

                dataPacket.status = MessageStatus.RECEIVED

                // if (p.hasUser()) handleReceivedUser(fromNum, p.user)

                /// We tell other apps about most message types, but some may have sensitve data, so that is not shared'
                var shouldBroadcast = !fromUs

                when (data.portnumValue) {
                    Portnums.PortNum.TEXT_MESSAGE_APP_VALUE -> {
                        if (fromUs) return

                        // TODO temporary solution to Range Test spam, may be removed in the future
                        val isRangeTest = rangeTestRegex.matches(data.payload.toStringUtf8())
                        if (!moduleConfig.rangeTest.enabled && isRangeTest) return

                        debug("Received CLEAR_TEXT from $fromId")
                        rememberDataPacket(dataPacket)
                    }

                    Portnums.PortNum.WAYPOINT_APP_VALUE -> {
                        val u = MeshProtos.Waypoint.parseFrom(data.payload)
                        // Validate locked Waypoints from the original sender
                        if (u.lockedTo != 0 && u.lockedTo != packet.from) return
                        rememberDataPacket(dataPacket, u.expire > currentSecond())
                    }

                    // Handle new style position info
                    Portnums.PortNum.POSITION_APP_VALUE -> {
                        if (data.wantResponse) return // ignore data from position requests
                        val u = MeshProtos.Position.parseFrom(data.payload)
                        // debug("position_app ${packet.from} ${u.toOneLineString()}")
                        handleReceivedPosition(packet.from, u, dataPacket.time)
                    }

                    // Handle new style user info
                    Portnums.PortNum.NODEINFO_APP_VALUE ->
                        if (!fromUs) {
                            val u = MeshProtos.User.parseFrom(data.payload)
                                .copy { if (packet.viaMqtt) longName = "$longName (MQTT)" }
                            handleReceivedUser(packet.from, u, packet.channel)
                        }

                    // Handle new telemetry info
                    Portnums.PortNum.TELEMETRY_APP_VALUE -> {
                        val u = TelemetryProtos.Telemetry.parseFrom(data.payload)
                        handleReceivedTelemetry(packet.from, u, dataPacket.time)
                    }

                    Portnums.PortNum.ROUTING_APP_VALUE -> {
                        // We always send ACKs to other apps, because they might care about the messages they sent
                        shouldBroadcast = true
                        val u = MeshProtos.Routing.parseFrom(data.payload)
                        val isAck = u.errorReasonValue == MeshProtos.Routing.Error.NONE_VALUE

                        if (u.errorReason == MeshProtos.Routing.Error.DUTY_CYCLE_LIMIT) {
                            radioConfigRepository.setErrorMessage(getString(R.string.error_duty_cycle))
                        }

                        handleAckNak(isAck, fromId, data.requestId)
                        queueResponse.remove(data.requestId)?.complete(true)
                    }

                    Portnums.PortNum.ADMIN_APP_VALUE -> {
                        val u = AdminProtos.AdminMessage.parseFrom(data.payload)
                        handleReceivedAdmin(packet.from, u)
                        shouldBroadcast = false
                    }

                    Portnums.PortNum.STORE_FORWARD_APP_VALUE -> {
                        val u = StoreAndForwardProtos.StoreAndForward.parseFrom(data.payload)
                        handleReceivedStoreAndForward(dataPacket, u)
                        shouldBroadcast = false
                    }

                    Portnums.PortNum.RANGE_TEST_APP_VALUE -> {
                        if (!moduleConfig.rangeTest.enabled) return
                        val u = dataPacket.copy(dataType = Portnums.PortNum.TEXT_MESSAGE_APP_VALUE)
                        rememberDataPacket(u)
                    }

                    Portnums.PortNum.DETECTION_SENSOR_APP_VALUE -> {
                        val u = dataPacket.copy(dataType = Portnums.PortNum.TEXT_MESSAGE_APP_VALUE)
                        rememberDataPacket(u)
                    }

                    Portnums.PortNum.TRACEROUTE_APP_VALUE -> {
                        if (data.wantResponse) return // ignore data from traceroute requests
                        val parsed = MeshProtos.RouteDiscovery.parseFrom(data.payload)
                        handleReceivedTraceroute(packet, parsed)
                    }

                    else -> debug("No custom processing needed for ${data.portnumValue}")
                }

                // We always tell other apps when new data packets arrive
                if (shouldBroadcast)
                    serviceBroadcasts.broadcastReceivedData(dataPacket)

                GeeksvilleApplication.analytics.track(
                    "num_data_receive",
                    DataPair(1)
                )

                GeeksvilleApplication.analytics.track(
                    "data_receive",
                    DataPair("num_bytes", bytes.size),
                    DataPair("type", data.portnumValue)
                )
            }
        }
    }

    private fun handleReceivedAdmin(fromNodeNum: Int, a: AdminProtos.AdminMessage) {
        if (fromNodeNum == myNodeNum) {
            when (a.payloadVariantCase) {
                AdminProtos.AdminMessage.PayloadVariantCase.GET_CONFIG_RESPONSE -> {
                    val response = a.getConfigResponse
                    debug("Admin: received config ${response.payloadVariantCase}")
                    setLocalConfig(response)
                }

                AdminProtos.AdminMessage.PayloadVariantCase.GET_CHANNEL_RESPONSE -> {
                    val mi = myNodeInfo
                    if (mi != null) {
                        val ch = a.getChannelResponse
                        debug("Admin: Received channel ${ch.index}")

                        if (ch.index + 1 < mi.maxChannels) {
                            handleChannel(ch)
                        }
                    }
                }
                else ->
                    warn("No special processing needed for ${a.payloadVariantCase}")

            }
        } else {
            debug("Admin: Received session_passkey from $fromNodeNum")
            sessionPasskey = a.sessionPasskey
        }
    }

    /// Update our DB of users based on someone sending out a User subpacket
    private fun handleReceivedUser(fromNum: Int, p: MeshProtos.User, channel: Int = 0) {
        updateNodeInfo(fromNum) {
            it.user = MeshUser(p)
            it.channel = channel
        }
    }

    /** Update our DB of users based on someone sending out a Position subpacket
     * @param defaultTime in msecs since 1970
     */
    private fun handleReceivedPosition(
        fromNum: Int,
        p: MeshProtos.Position,
        defaultTime: Long = System.currentTimeMillis()
    ) {
        // Nodes periodically send out position updates, but those updates might not contain a lat & lon (because no GPS lock)
        // We like to look at the local node to see if it has been sending out valid lat/lon, so for the LOCAL node (only)
        // we don't record these nop position updates
        if (myNodeNum == fromNum && p.latitudeI == 0 && p.longitudeI == 0) {
            debug("Ignoring nop position update for the local node")
        } else {
            updateNodeInfo(fromNum) {
                debug("update position: ${it.user?.longName?.toPIIString()} with ${p.toPIIString()}")
                it.position = Position(p, (defaultTime / 1000L).toInt())
            }
        }
    }

    /// Update our DB of users based on someone sending out a Telemetry subpacket
    private fun handleReceivedTelemetry(
        fromNum: Int,
        t: TelemetryProtos.Telemetry,
        defaultTime: Long = System.currentTimeMillis()
    ) {
        updateNodeInfo(fromNum) {
            if (t.hasDeviceMetrics()) it.deviceMetrics = DeviceMetrics(
                t.deviceMetrics, if (t.time != 0) t.time else (defaultTime / 1000L).toInt()
            )
            if (t.hasEnvironmentMetrics()) it.environmentMetrics = EnvironmentMetrics(
                t.environmentMetrics, if (t.time != 0) t.time else (defaultTime / 1000L).toInt()
            )
        }
    }

    private fun handleReceivedStoreAndForward(
        dataPacket: DataPacket,
        s: StoreAndForwardProtos.StoreAndForward,
    ) {
        debug("StoreAndForward: ${s.variantCase} ${s.rr} from ${dataPacket.from}")
        when (s.variantCase) {
            StoreAndForwardProtos.StoreAndForward.VariantCase.STATS -> {
                val u = dataPacket.copy(
                    bytes = s.stats.toString().encodeToByteArray(),
                    dataType = Portnums.PortNum.TEXT_MESSAGE_APP_VALUE
                )
                rememberDataPacket(u)
            }

            StoreAndForwardProtos.StoreAndForward.VariantCase.HISTORY -> {
                val text = """
                    Total messages: ${s.history.historyMessages}
                    History window: ${s.history.window / 60000} min
                    Last request: ${s.history.lastRequest}
                """.trimIndent()
                val u = dataPacket.copy(
                    bytes = text.encodeToByteArray(),
                    dataType = Portnums.PortNum.TEXT_MESSAGE_APP_VALUE
                )
                rememberDataPacket(u)
            }

            StoreAndForwardProtos.StoreAndForward.VariantCase.TEXT -> {
                if (s.rr == StoreAndForwardProtos.StoreAndForward.RequestResponse.ROUTER_TEXT_BROADCAST) {
                    dataPacket.to = DataPacket.ID_BROADCAST
                }
                val u = dataPacket.copy(
                    bytes = s.text.toByteArray(),
                    dataType = Portnums.PortNum.TEXT_MESSAGE_APP_VALUE,
                )
                rememberDataPacket(u)
            }

            else -> {}
        }
    }

    @Suppress("MagicNumber")
    private fun formatTraceroutePath(nodesList: List<Int>, snrList: List<Int>): String {
        // nodesList should include both origin and destination nodes
        // origin will not have an SNR value, but destination should
        val snrStr = if (snrList.size == nodesList.size - 1) snrList else {
            // use unknown SNR for entire route if snrList has invalid size
            List(nodesList.size - 1) { -128 }
        }.map { snr ->
            val str = if (snr == -128) "?" else "${snr / 4}"
            "⇊ $str dB"
        }

        return nodesList.map { nodeId ->
            "■ ${getUserName(nodeId)}"
        }.flatMapIndexed { i, nodeStr ->
            if (i == 0) listOf(nodeStr) else listOf(snrStr[i-1], nodeStr)
        }.joinToString("\n")
    }

    private fun handleReceivedTraceroute(packet: MeshPacket, trace: RouteDiscovery) {
        val nodesToward = mutableListOf<Int>()
        nodesToward.add(packet.to)
        nodesToward += trace.routeList
        nodesToward.add(packet.from)

        val nodesBack = mutableListOf<Int>()
        if (packet.hopStart > 0 && trace.snrBackList.size > 0) { // otherwise back route is invalid
            nodesBack.add(packet.from)
            nodesBack += trace.routeBackList
            nodesBack.add(packet.to)
        }

        radioConfigRepository.setTracerouteResponse(buildString {
            append("Route traced toward destination:\n\n")
            append(formatTraceroutePath(nodesToward, trace.snrTowardsList))
            if (nodesBack.size > 0) {
                append("\n\n")
                append("Route traced back to us:\n\n")
                append(formatTraceroutePath(nodesBack, trace.snrBackList))
            }
        })
    }

    // If apps try to send packets when our radio is sleeping, we queue them here instead
    private val offlineSentPackets = mutableListOf<DataPacket>()

    /// Update our model and resend as needed for a MeshPacket we just received from the radio
    private fun handleReceivedMeshPacket(packet: MeshPacket) {
        if (haveNodeDB) {
            processReceivedMeshPacket(packet)
            onNodeDBChanged()
        } else {
            warn("Ignoring early received packet: ${packet.toOneLineString()}")
            //earlyReceivedPackets.add(packet)
            //logAssert(earlyReceivedPackets.size < 128) // The max should normally be about 32, but if the device is messed up it might try to send forever
        }
    }

    private val queuedPackets = ConcurrentLinkedQueue<MeshPacket>()
    private val queueResponse = mutableMapOf<Int, CompletableFuture<Boolean>>()
    private var queueJob: Job? = null

    private fun sendPacket(packet: MeshPacket): CompletableFuture<Boolean> {
        // send the packet to the radio and return a CompletableFuture that will be completed with the result
        val future = CompletableFuture<Boolean>()
        queueResponse[packet.id] = future
        try {
            if (connectionState != ConnectionState.CONNECTED) throw RadioNotConnectedException()
            sendToRadio(ToRadio.newBuilder().apply {
                this.packet = packet
            })
        } catch (ex: Exception) {
            errormsg("sendToRadio error:", ex)
            future.complete(false)
        }
        return future
    }

    private fun startPacketQueue() {
        if (queueJob?.isActive == true) return
        queueJob = serviceScope.handledLaunch {
            debug("packet queueJob started")
            while (connectionState == ConnectionState.CONNECTED) {
                // take the first packet from the queue head
                val packet = queuedPackets.poll() ?: break
                try {
                    // send packet to the radio and wait for response
                    val response = sendPacket(packet)
                    debug("queueJob packet id=${packet.id.toUInt()} waiting")
                    val success = response.get(2, TimeUnit.MINUTES)
                    debug("queueJob packet id=${packet.id.toUInt()} success $success")
                } catch (e: TimeoutException) {
                    debug("queueJob packet id=${packet.id.toUInt()} timeout")
                } catch (e: Exception) {
                    debug("queueJob packet id=${packet.id.toUInt()} failed")
                }
            }
        }
    }

    private fun stopPacketQueue() {
        if (queueJob?.isActive == true) {
            info("Stopping packet queueJob")
            queueJob?.cancel()
            queueJob = null
            queuedPackets.clear()
            queueResponse.entries.lastOrNull { !it.value.isDone }?.value?.complete(false)
            queueResponse.clear()
        }
    }

    private fun sendNow(p: DataPacket) {
        val packet = toMeshPacket(p)
        p.time = System.currentTimeMillis() // update time to the actual time we started sending
        // debug("Sending to radio: ${packet.toPIIString()}")
        sendToRadio(packet)
    }

    private fun processQueuedPackets() {
        val sentPackets = mutableListOf<DataPacket>()
        offlineSentPackets.forEach { p ->
            try {
                sendNow(p)
                sentPackets.add(p)
            } catch (ex: Exception) {
                errormsg("Error sending queued message:", ex)
            }
        }
        offlineSentPackets.removeAll(sentPackets)
    }

    private suspend fun getDataPacketById(packetId: Int): DataPacket? = withTimeoutOrNull(1000) {
        var dataPacket: DataPacket? = null
        while (dataPacket == null) {
            dataPacket = packetRepository.get().getDataPacketById(packetId)
            if (dataPacket == null) delay(100)
        }
        dataPacket
    }

    /**
     * Change the status on a DataPacket and update watchers
     */
    private fun changeStatus(packetId: Int, m: MessageStatus) = serviceScope.handledLaunch {
        if (packetId != 0) getDataPacketById(packetId)?.let { p ->
            if (p.status == m) return@handledLaunch
            packetRepository.get().updateMessageStatus(p, m)
            serviceBroadcasts.broadcastMessageStatus(packetId, m)
        }
    }

    /**
     * Handle an ack/nak packet by updating sent message status
     */
    private fun handleAckNak(isAck: Boolean, fromId: String, requestId: Int) {
        serviceScope.handledLaunch {
            val p = getDataPacketById(requestId)
            // distinguish real ACKs coming from the intended receiver
            val m = if (isAck && fromId == p?.to) MessageStatus.RECEIVED
            else if (isAck) MessageStatus.DELIVERED else MessageStatus.ERROR
            if (p != null && p.status != MessageStatus.RECEIVED)
                packetRepository.get().updateMessageStatus(p, m)
            serviceBroadcasts.broadcastMessageStatus(requestId, m)
        }
    }

    /// Update our model and resend as needed for a MeshPacket we just received from the radio
    private fun processReceivedMeshPacket(packet: MeshPacket) {
        val fromNum = packet.from

        // FIXME, perhaps we could learn our node ID by looking at any to packets the radio
        // decided to pass through to us (except for broadcast packets)
        //val toNum = packet.to

        // debug("Recieved: $packet")
        if (packet.hasDecoded()) {
            val packetToSave = MeshLog(
                UUID.randomUUID().toString(),
                "Packet",
                System.currentTimeMillis(),
                packet.toString()
            )
            insertMeshLog(packetToSave)

            serviceScope.handledLaunch {
                radioConfigRepository.emitMeshPacket(packet)
            }

            // Update last seen for the node that sent the packet, but also for _our node_ because anytime a packet passes
            // through our node on the way to the phone that means that local node is also alive in the mesh

            val isOtherNode = myNodeNum != fromNum
            updateNodeInfo(myNodeNum, withBroadcast = isOtherNode) {
                it.lastHeard = currentSecond()
            }

            // Do not generate redundant broadcasts of node change for this bookkeeping updateNodeInfo call
            // because apps really only care about important updates of node state - which handledReceivedData will give them
            updateNodeInfo(fromNum, withBroadcast = false) {
                // If the rxTime was not set by the device (because device software was old), guess at a time
                val rxTime = if (packet.rxTime != 0) packet.rxTime else currentSecond()

                // Update our last seen based on any valid timestamps.  If the device didn't provide a timestamp make one
                it.lastHeard = rxTime
                it.snr = packet.rxSnr
                it.rssi = packet.rxRssi

                // Generate our own hopsAway, comparing hopStart to hopLimit.
                if (packet.hopStart != 0 && packet.hopLimit <= packet.hopStart) {
                    it.hopsAway = packet.hopStart - packet.hopLimit
                }
            }
            handleReceivedData(packet)
        }
    }

    private fun insertMeshLog(packetToSave: MeshLog) {
        serviceScope.handledLaunch {
            // Do not log, because might contain PII
            // info("insert: ${packetToSave.message_type} = ${packetToSave.raw_message.toOneLineString()}")
            meshLogRepository.get().insert(packetToSave)
        }
    }

    private fun setLocalConfig(config: ConfigProtos.Config) {
        serviceScope.handledLaunch {
            radioConfigRepository.setLocalConfig(config)
        }
    }

    private fun setLocalModuleConfig(config: ModuleConfigProtos.ModuleConfig) {
        serviceScope.handledLaunch {
            radioConfigRepository.setLocalModuleConfig(config)
        }
    }

    private fun clearLocalConfig() {
        serviceScope.handledLaunch {
            radioConfigRepository.clearLocalConfig()
            radioConfigRepository.clearLocalModuleConfig()
        }
    }

    private fun updateChannelSettings(ch: ChannelProtos.Channel) = serviceScope.handledLaunch {
        radioConfigRepository.updateChannelSettings(ch)
    }

    private fun currentSecond() = (System.currentTimeMillis() / 1000).toInt()


    /// If we just changed our nodedb, we might want to do somethings
    private fun onNodeDBChanged() {
        maybeUpdateServiceStatusNotification()
    }

    /**
     * Send in analytics about mesh connection
     */
    private fun reportConnection() {
        val radioModel = DataPair("radio_model", myNodeInfo?.model ?: "unknown")
        GeeksvilleApplication.analytics.track(
            "mesh_connect",
            DataPair("num_nodes", numNodes),
            DataPair("num_online", numOnlineNodes),
            radioModel
        )

        // Once someone connects to hardware start tracking the approximate number of nodes in their mesh
        // this allows us to collect stats on what typical mesh size is and to tell difference between users who just
        // downloaded the app, vs has connected it to some hardware.
        GeeksvilleApplication.analytics.setUserInfo(
            DataPair("num_nodes", numNodes),
            radioModel
        )
    }

    private var sleepTimeout: Job? = null

    /// msecs since 1970 we started this connection
    private var connectTimeMsec = 0L

    /// Called when we gain/lose connection to our radio
    private fun onConnectionChanged(c: ConnectionState) {
        debug("onConnectionChanged: $connectionState -> $c")

        /// Perform all the steps needed once we start waiting for device sleep to complete
        fun startDeviceSleep() {
            stopPacketQueue()
            stopLocationRequests()
            stopMqttClientProxy()

            if (connectTimeMsec != 0L) {
                val now = System.currentTimeMillis()
                connectTimeMsec = 0L

                GeeksvilleApplication.analytics.track(
                    "connected_seconds",
                    DataPair((now - connectTimeMsec) / 1000.0)
                )
            }

            // Have our timeout fire in the appropriate number of seconds
            sleepTimeout = serviceScope.handledLaunch {
                try {
                    // If we have a valid timeout, wait that long (+30 seconds) otherwise, just wait 30 seconds
                    val timeout = (localConfig.power?.lsSecs ?: 0) + 30

                    debug("Waiting for sleeping device, timeout=$timeout secs")
                    delay(timeout * 1000L)
                    warn("Device timeout out, setting disconnected")
                    onConnectionChanged(ConnectionState.DISCONNECTED)
                } catch (ex: CancellationException) {
                    debug("device sleep timeout cancelled")
                }
            }

            // broadcast an intent with our new connection state
            serviceBroadcasts.broadcastConnection()
        }

        fun startDisconnect() {
            stopPacketQueue()
            stopLocationRequests()
            stopMqttClientProxy()

            GeeksvilleApplication.analytics.track(
                "mesh_disconnect",
                DataPair("num_nodes", numNodes),
                DataPair("num_online", numOnlineNodes)
            )
            GeeksvilleApplication.analytics.track("num_nodes", DataPair(numNodes))

            // broadcast an intent with our new connection state
            serviceBroadcasts.broadcastConnection()
        }

        fun startConnect() {
            // Do our startup init
            try {
                connectTimeMsec = System.currentTimeMillis()
                startConfig()
            } catch (ex: InvalidProtocolBufferException) {
                errormsg(
                    "Invalid protocol buffer sent by device - update device software and try again",
                    ex
                )
            } catch (ex: RadioNotConnectedException) {
                // note: no need to call startDeviceSleep(), because this exception could only have reached us if it was already called
                errormsg("Lost connection to radio during init - waiting for reconnect")
            } catch (ex: RemoteException) {
                // It seems that when the ESP32 goes offline it can briefly come back for a 100ms ish which
                // causes the phone to try and reconnect.  If we fail downloading our initial radio state we don't want to
                // claim we have a valid connection still
                connectionState = ConnectionState.DEVICE_SLEEP
                startDeviceSleep()
                throw ex // Important to rethrow so that we don't tell the app all is well
            }
        }

        // Cancel any existing timeouts
        sleepTimeout?.let {
            it.cancel()
            sleepTimeout = null
        }

        connectionState = c
        when (c) {
            ConnectionState.CONNECTED -> startConnect()
            ConnectionState.DEVICE_SLEEP -> startDeviceSleep()
            ConnectionState.DISCONNECTED -> startDisconnect()
        }

        // Update the android notification in the status bar
        maybeUpdateServiceStatusNotification()
    }

    private fun maybeUpdateServiceStatusNotification() {
        val currentSummary = notificationSummary
        if (previousSummary == null || !previousSummary.equals(currentSummary)) {
            serviceNotifications.updateServiceStateNotification(currentSummary)
            previousSummary = currentSummary
        }
    }

    private fun onRadioConnectionState(state: RadioServiceConnectionState) {
        // sleep now disabled by default on ESP32, permanent is true unless light sleep enabled
        val isRouter = localConfig.device.role == ConfigProtos.Config.DeviceConfig.Role.ROUTER
        val lsEnabled = localConfig.power.isPowerSaving || isRouter
        val connected = state.isConnected
        val permanent = state.isPermanent || !lsEnabled
        onConnectionChanged(
            when {
                connected -> ConnectionState.CONNECTED
                permanent -> ConnectionState.DISCONNECTED
                else -> ConnectionState.DEVICE_SLEEP
            }
        )
    }

    private fun onReceiveFromRadio(bytes: ByteArray) {
        try {
            val proto = MeshProtos.FromRadio.parseFrom(bytes)
            // info("Received from radio service: ${proto.toOneLineString()}")
            when (proto.payloadVariantCase.number) {
                MeshProtos.FromRadio.PACKET_FIELD_NUMBER -> handleReceivedMeshPacket(proto.packet)
                MeshProtos.FromRadio.CONFIG_COMPLETE_ID_FIELD_NUMBER -> handleConfigComplete(proto.configCompleteId)
                MeshProtos.FromRadio.MY_INFO_FIELD_NUMBER -> handleMyInfo(proto.myInfo)
                MeshProtos.FromRadio.NODE_INFO_FIELD_NUMBER -> handleNodeInfo(proto.nodeInfo)
                MeshProtos.FromRadio.CHANNEL_FIELD_NUMBER -> handleChannel(proto.channel)
                MeshProtos.FromRadio.CONFIG_FIELD_NUMBER -> handleDeviceConfig(proto.config)
                MeshProtos.FromRadio.MODULECONFIG_FIELD_NUMBER -> handleModuleConfig(proto.moduleConfig)
                MeshProtos.FromRadio.QUEUESTATUS_FIELD_NUMBER -> handleQueueStatus(proto.queueStatus)
                MeshProtos.FromRadio.METADATA_FIELD_NUMBER -> handleMetadata(proto.metadata)
                MeshProtos.FromRadio.MQTTCLIENTPROXYMESSAGE_FIELD_NUMBER -> handleMqttProxyMessage(proto.mqttClientProxyMessage)
                MeshProtos.FromRadio.CLIENTNOTIFICATION_FIELD_NUMBER -> {
                    handleClientNotification(proto.clientNotification)
                }
                else -> errormsg("Unexpected FromRadio variant")
            }
        } catch (ex: InvalidProtocolBufferException) {
            errormsg("Invalid Protobuf from radio, len=${bytes.size}", ex)
        }
    }

    /// A provisional MyNodeInfo that we will install if all of our node config downloads go okay
    private var newMyNodeInfo: MyNodeInfo? = null

    /// provisional NodeInfos we will install if all goes well
    private val newNodes = mutableListOf<MeshProtos.NodeInfo>()

    /// Used to make sure we never get foold by old BLE packets
    private var configNonce = 1

    private fun handleDeviceConfig(config: ConfigProtos.Config) {
        debug("Received config ${config.toOneLineString()}")
        val packetToSave = MeshLog(
            UUID.randomUUID().toString(),
            "Config ${config.payloadVariantCase}",
            System.currentTimeMillis(),
            config.toString()
        )
        insertMeshLog(packetToSave)
        setLocalConfig(config)
        val configCount = localConfig.allFields.size
        radioConfigRepository.setStatusMessage("Device config ($configCount / $configTotal)")
    }

    private fun handleModuleConfig(config: ModuleConfigProtos.ModuleConfig) {
        debug("Received moduleConfig ${config.toOneLineString()}")
        val packetToSave = MeshLog(
            UUID.randomUUID().toString(),
            "ModuleConfig ${config.payloadVariantCase}",
            System.currentTimeMillis(),
            config.toString()
        )
        insertMeshLog(packetToSave)
        setLocalModuleConfig(config)
        val moduleCount = moduleConfig.allFields.size
        radioConfigRepository.setStatusMessage("Module config ($moduleCount / $moduleTotal)")
    }

    private fun handleQueueStatus(queueStatus: MeshProtos.QueueStatus) {
        debug("queueStatus ${queueStatus.toOneLineString()}")
        val (success, isFull, requestId) = with(queueStatus) {
            Triple(res == 0, free == 0, meshPacketId)
        }
        if (success && isFull) return // Queue is full, wait for free != 0
        if (requestId != 0) queueResponse.remove(requestId)?.complete(success)
        else queueResponse.entries.lastOrNull { !it.value.isDone }?.value?.complete(success)
    }

    private fun handleChannel(ch: ChannelProtos.Channel) {
        debug("Received channel ${ch.index}")
        val packetToSave = MeshLog(
            UUID.randomUUID().toString(),
            "Channel",
            System.currentTimeMillis(),
            ch.toString()
        )
        insertMeshLog(packetToSave)
        if (ch.role != ChannelProtos.Channel.Role.DISABLED) updateChannelSettings(ch)
        val maxChannels = myNodeInfo?.maxChannels ?: 8
        radioConfigRepository.setStatusMessage("Channels (${ch.index + 1} / $maxChannels)")
    }

    private fun MeshProtos.NodeInfo.toEntity() = NodeInfo(
        num = num,
        user = if (hasUser()) {
            MeshUser(user.copy { if (viaMqtt) longName = "$longName (MQTT)" })
        } else {
            defaultUser(num)
        },
        position = if (hasPosition()) {
            Position(position)
        } else {
            null
        },
        snr = snr,
        lastHeard = lastHeard,
        deviceMetrics = if(hasDeviceMetrics()) {
            DeviceMetrics(deviceMetrics)
        } else {
            null
        },
        channel = channel,
        hopsAway = hopsAway,
    )

    private fun handleNodeInfo(info: MeshProtos.NodeInfo) {
        debug("Received nodeinfo num=${info.num}, hasUser=${info.hasUser()}, hasPosition=${info.hasPosition()}, hasDeviceMetrics=${info.hasDeviceMetrics()}")

        val packetToSave = MeshLog(
            UUID.randomUUID().toString(),
            "NodeInfo",
            System.currentTimeMillis(),
            info.toString()
        )
        insertMeshLog(packetToSave)

        newNodes.add(info)
        radioConfigRepository.setStatusMessage("Nodes (${newNodes.size} / 100)")
    }

    private var rawMyNodeInfo: MeshProtos.MyNodeInfo? = null
    private var rawDeviceMetadata: MeshProtos.DeviceMetadata? = null

    /** Regenerate the myNodeInfo model.  We call this twice.  Once after we receive myNodeInfo from the device
     * and again after we have the node DB (which might allow us a better notion of our HwModel.
     */
    private fun regenMyNodeInfo() {
        val myInfo = rawMyNodeInfo
        if (myInfo != null) {
            val mi = with(myInfo) {
                MyNodeInfo(
                    myNodeNum = myNodeNum,
                    hasGPS = false,
                    model = rawDeviceMetadata?.hwModel?.let { hwModel ->
                        if (hwModel == MeshProtos.HardwareModel.UNSET) null
                        else hwModel.name.replace('_', '-').replace('p', '.').lowercase()
                    },
                    firmwareVersion = rawDeviceMetadata?.firmwareVersion,
                    couldUpdate = false,
                    shouldUpdate = false, // TODO add check after re-implementing firmware updates
                    currentPacketId = currentPacketId and 0xffffffffL,
                    messageTimeoutMsec = 5 * 60 * 1000, // constants from current firmware code
                    minAppVersion = minAppVersion,
                    maxChannels = 8,
                    hasWifi = rawDeviceMetadata?.hasWifi ?: false,
                    channelUtilization = 0f,
                    airUtilTx = 0f,
                )
            }
            newMyNodeInfo = mi
        }
    }

    private fun sendAnalytics() {
        val myInfo = rawMyNodeInfo
        val mi = myNodeInfo
        if (myInfo != null && mi != null) {
            /// Track types of devices and firmware versions in use
            GeeksvilleApplication.analytics.setUserInfo(
                DataPair("firmware", mi.firmwareVersion),
                DataPair("hw_model", mi.model),
            )
        }
    }

    /**
     * Update MyNodeInfo (called from either new API version or the old one)
     */
    private fun handleMyInfo(myInfo: MeshProtos.MyNodeInfo) {
        val packetToSave = MeshLog(
            UUID.randomUUID().toString(),
            "MyNodeInfo",
            System.currentTimeMillis(),
            myInfo.toString()
        )
        insertMeshLog(packetToSave)

        rawMyNodeInfo = myInfo

        // We'll need to get a new set of channels and settings now
        serviceScope.handledLaunch {
            radioConfigRepository.clearChannelSet()
            radioConfigRepository.clearLocalConfig()
            radioConfigRepository.clearLocalModuleConfig()
        }
    }

    /**
     * Update our DeviceMetadata
     */
    private fun handleMetadata(metadata: MeshProtos.DeviceMetadata) {
        debug("Received deviceMetadata ${metadata.toOneLineString()}")
        val packetToSave = MeshLog(
            UUID.randomUUID().toString(),
            "DeviceMetadata",
            System.currentTimeMillis(),
            metadata.toString()
        )
        insertMeshLog(packetToSave)

        rawDeviceMetadata = metadata
        regenMyNodeInfo()
    }

    /**
     * Publish MqttClientProxyMessage (fromRadio)
     */
    private fun handleMqttProxyMessage(message: MeshProtos.MqttClientProxyMessage) {
        with(message) {
            when (payloadVariantCase) {
                MeshProtos.MqttClientProxyMessage.PayloadVariantCase.TEXT -> {
                    mqttRepository.publish(topic, text.encodeToByteArray(), retained)
                }

                MeshProtos.MqttClientProxyMessage.PayloadVariantCase.DATA -> {
                    mqttRepository.publish(topic, data.toByteArray(), retained)
                }

                else -> {}
            }
        }
    }

    private fun handleClientNotification(notification: MeshProtos.ClientNotification) {
        debug("Received clientNotification ${notification.toOneLineString()}")
        radioConfigRepository.setErrorMessage(notification.message)
    }

    /**
     * Connect, subscribe and receive Flow of MqttClientProxyMessage (toRadio)
     */
    private fun startMqttClientProxy() {
        if (mqttMessageFlow?.isActive == true) return
        if (moduleConfig.mqtt.enabled && moduleConfig.mqtt.proxyToClientEnabled) {
            mqttMessageFlow = mqttRepository.proxyMessageFlow.onEach { message ->
                sendToRadio(ToRadio.newBuilder().apply { mqttClientProxyMessage = message })
            }.catch { throwable ->
                radioConfigRepository.setErrorMessage("MqttClientProxy failed: $throwable")
            }.launchIn(serviceScope)
        }
    }

    private fun stopMqttClientProxy() {
        if (mqttMessageFlow?.isActive == true) {
            info("Stopping MqttClientProxy")
            mqttMessageFlow?.cancel()
            mqttMessageFlow = null
        }
    }

    /// If we've received our initial config, our radio settings and all of our channels, send any queued packets and broadcast connected to clients
    private fun onHasSettings() {

        processQueuedPackets() // send any packets that were queued up
        startMqttClientProxy()

        // broadcast an intent with our new connection state
        serviceBroadcasts.broadcastConnection()
        onNodeDBChanged()
        reportConnection()
    }

    private fun handleConfigComplete(configCompleteId: Int) = serviceScope.handledLaunch {
        if (configCompleteId == configNonce) {

            val packetToSave = MeshLog(
                UUID.randomUUID().toString(),
                "ConfigComplete",
                System.currentTimeMillis(),
                configCompleteId.toString()
            )
            insertMeshLog(packetToSave)

            // This was our config request
            if (newMyNodeInfo == null || newNodes.isEmpty()) {
                errormsg("Did not receive a valid config")
            } else {
                debug("Installing new node DB")
                radioConfigRepository.installNodeDB(newMyNodeInfo!!, newNodes.map { it.toEntity() })
                newNodes.clear() // Just to save RAM ;-)

                withTimeoutOrNull(timeMillis = 5000) {
                    while (myNodeInfo == null) {
                        delay(100)
                    }
                } ?: errormsg("Timeout: installNodeDB failed!")

                haveNodeDB = true // we now have nodes from real hardware

                sendToRadio(newMeshPacketTo(myNodeNum).buildAdminPacket {
                    setTimeOnly = currentSecond()
                })
                sendAnalytics()

                if (deviceVersion < minDeviceVersion || appVersion < minAppVersion) {
                    info("Device firmware or app is too old, faking config so firmware update can occur")
                    clearLocalConfig()
                    setLocalConfig(config { security = security.copy { isManaged = true } })
                }
                onHasSettings()
            }
        } else {
            warn("Ignoring stale config complete")
        }
    }

    /**
     * Start the modern (REV2) API configuration flow
     */
    private fun startConfig() {
        configNonce += 1
        newNodes.clear()
        newMyNodeInfo = null

        if (BluetoothInterface.invalidVersion) onHasSettings() // Device firmware is too old

        debug("Starting config nonce=$configNonce")

        sendToRadio(ToRadio.newBuilder().apply {
            this.wantConfigId = configNonce
        })
    }

    /**
     * Send a position (typically from our built in GPS) into the mesh.
     */
    private fun sendPosition(
        position: MeshProtos.Position,
        destNum: Int? = null,
        wantResponse: Boolean = false
    ) {
        try {
            val mi = myNodeInfo
            if (mi != null) {
                val idNum = destNum ?: mi.myNodeNum // when null we just send to the local node
                debug("Sending our position/time to=$idNum ${Position(position)}")

                // Also update our own map for our nodeNum, by handling the packet just like packets from other users
                handleReceivedPosition(mi.myNodeNum, position)

                sendToRadio(newMeshPacketTo(idNum).buildMeshPacket(
                    channel = if (destNum == null) 0 else nodeDBbyNodeNum[destNum]?.channel ?: 0,
                    priority = MeshPacket.Priority.BACKGROUND,
                ) {
                    portnumValue = Portnums.PortNum.POSITION_APP_VALUE
                    payload = position.toByteString()
                    this.wantResponse = wantResponse
                })
            }
        } catch (ex: BLEException) {
            warn("Ignoring disconnected radio during gps location update")
        }
    }

    /**
     * Send setOwner admin packet with [MeshProtos.User] protobuf
     */
    private fun setOwner(packetId: Int, user: MeshProtos.User) = with(user) {
        val dest = nodeDBbyID[id]
            ?: throw Exception("Can't set user without a NodeInfo") // this shouldn't happen
        val old = dest.user!!
        if (longName == old.longName && shortName == old.shortName && isLicensed == old.isLicensed) {
            debug("Ignoring nop owner change")
        } else {
            debug("setOwner Id: $id longName: ${longName.anonymize} shortName: $shortName isLicensed: $isLicensed")

            // Also update our own map for our nodeNum, by handling the packet just like packets from other users
            handleReceivedUser(dest.num, user)

            // encapsulate our payload in the proper protobuf and fire it off
            sendToRadio(newMeshPacketTo(dest.num).buildAdminPacket(id = packetId) {
                setOwner = user
            })
        }
    }


    /// Do not use directly, instead call generatePacketId()
    private var currentPacketId = Random(System.currentTimeMillis()).nextLong().absoluteValue

    /**
     * Generate a unique packet ID (if we know enough to do so - otherwise return 0 so the device will do it)
     */
    @Synchronized
    private fun generatePacketId(): Int {
        val numPacketIds =
            ((1L shl 32) - 1) // A mask for only the valid packet ID bits, either 255 or maxint

        currentPacketId++

        currentPacketId = currentPacketId and 0xffffffff // keep from exceeding 32 bits

        // Use modulus and +1 to ensure we skip 0 on any values we return
        return ((currentPacketId % numPacketIds) + 1L).toInt()
    }

    private fun enqueueForSending(p: DataPacket) {
        if (p.dataType in rememberDataType) {
            offlineSentPackets.add(p)
        }
    }

    private val binder = object : IMeshService.Stub() {

        override fun setDeviceAddress(deviceAddr: String?) = toRemoteExceptions {
            debug("Passing through device change to radio service: ${deviceAddr.anonymize}")

            val res = radioInterfaceService.setDeviceAddress(deviceAddr)
            if (res) {
                haveNodeDB = false
            } else {
                serviceBroadcasts.broadcastConnection()
            }
            res
        }

        // Note: bound methods don't get properly exception caught/logged, so do that with a wrapper
        // per https://blog.classycode.com/dealing-with-exceptions-in-aidl-9ba904c6d63
        override fun subscribeReceiver(packageName: String, receiverName: String) =
            toRemoteExceptions {
                clientPackages[receiverName] = packageName
            }

        override fun getUpdateStatus(): Int = -4 // ProgressNotStarted

        override fun startFirmwareUpdate() = toRemoteExceptions {
            // TODO reimplement this after we have a new firmware update mechanism
        }

        override fun getMyNodeInfo(): MyNodeInfo? = this@MeshService.myNodeInfo

        override fun getMyId() = toRemoteExceptions { myNodeID }

        override fun getPacketId() = toRemoteExceptions { generatePacketId() }

        override fun setOwner(user: MeshUser) = toRemoteExceptions {
            setOwner(generatePacketId(), user.toProto())
        }

        override fun setRemoteOwner(id: Int, payload: ByteArray) = toRemoteExceptions {
            val parsed = MeshProtos.User.parseFrom(payload)
            setOwner(id, parsed)
        }

        override fun getRemoteOwner(id: Int, destNum: Int) = toRemoteExceptions {
            sendToRadio(newMeshPacketTo(destNum).buildAdminPacket(id = id, wantResponse = true) {
                getOwnerRequest = true
            })
        }

        override fun send(p: DataPacket) {
            toRemoteExceptions {
                if (p.id == 0) p.id = generatePacketId()

                info("sendData dest=${p.to}, id=${p.id} <- ${p.bytes!!.size} bytes (connectionState=$connectionState)")

                if (p.dataType == 0)
                    throw Exception("Port numbers must be non-zero!") // we are now more strict

                if (p.bytes.size >= MeshProtos.Constants.DATA_PAYLOAD_LEN.number) {
                    p.status = MessageStatus.ERROR
                    throw RemoteException("Message too long")
                } else p.status = MessageStatus.QUEUED

                if (connectionState == ConnectionState.CONNECTED) try {
                    sendNow(p)
                } catch (ex: Exception) {
                    errormsg("Error sending message, so enqueueing", ex)
                    enqueueForSending(p)
                } else {
                    enqueueForSending(p)
                }
                serviceBroadcasts.broadcastMessageStatus(p)

                // Keep a record of DataPackets, so GUIs can show proper chat history
                rememberDataPacket(p, false)

                GeeksvilleApplication.analytics.track(
                    "data_send",
                    DataPair("num_bytes", p.bytes.size),
                    DataPair("type", p.dataType)
                )

                GeeksvilleApplication.analytics.track(
                    "num_data_sent",
                    DataPair(1)
                )
            }
        }

        override fun getConfig(): ByteArray = toRemoteExceptions {
            this@MeshService.localConfig.toByteArray() ?: throw NoDeviceConfigException()
        }

        /** Send our current radio config to the device
         */
        override fun setConfig(payload: ByteArray) = toRemoteExceptions {
            setRemoteConfig(generatePacketId(), myNodeNum, payload)
        }

        override fun setRemoteConfig(id: Int, num: Int, payload: ByteArray) = toRemoteExceptions {
            debug("Setting new radio config!")
            val config = ConfigProtos.Config.parseFrom(payload)
            sendToRadio(newMeshPacketTo(num).buildAdminPacket(id = id) { setConfig = config })
            if (num == myNodeNum) setLocalConfig(config) // Update our local copy
        }

        override fun getRemoteConfig(id: Int, destNum: Int, config: Int) = toRemoteExceptions {
            sendToRadio(newMeshPacketTo(destNum).buildAdminPacket(id = id, wantResponse = true) {
                getConfigRequestValue = config
            })
        }

        /** Send our current module config to the device
         */
        override fun setModuleConfig(id: Int, num: Int, payload: ByteArray) = toRemoteExceptions {
            debug("Setting new module config!")
            val config = ModuleConfigProtos.ModuleConfig.parseFrom(payload)
            sendToRadio(newMeshPacketTo(num).buildAdminPacket(id = id) { setModuleConfig = config })
            if (num == myNodeNum) setLocalModuleConfig(config) // Update our local copy
        }

        override fun getModuleConfig(id: Int, destNum: Int, config: Int) = toRemoteExceptions {
            sendToRadio(newMeshPacketTo(destNum).buildAdminPacket(id = id, wantResponse = true) {
                getModuleConfigRequestValue = config
            })
        }

        override fun setRingtone(destNum: Int, ringtone: String) = toRemoteExceptions {
            sendToRadio(newMeshPacketTo(destNum).buildAdminPacket {
                setRingtoneMessage = ringtone
            })
        }

        override fun getRingtone(id: Int, destNum: Int) = toRemoteExceptions {
            sendToRadio(newMeshPacketTo(destNum).buildAdminPacket(id = id, wantResponse = true) {
                getRingtoneRequest = true
            })
        }

        override fun setCannedMessages(destNum: Int, messages: String) = toRemoteExceptions {
            sendToRadio(newMeshPacketTo(destNum).buildAdminPacket {
                setCannedMessageModuleMessages = messages
            })
        }

        override fun getCannedMessages(id: Int, destNum: Int) = toRemoteExceptions {
            sendToRadio(newMeshPacketTo(destNum).buildAdminPacket(id = id, wantResponse = true) {
                getCannedMessageModuleMessagesRequest = true
            })
        }

        override fun setChannel(payload: ByteArray?) = toRemoteExceptions {
            setRemoteChannel(generatePacketId(), myNodeNum, payload)
        }

        override fun setRemoteChannel(id: Int, num: Int, payload: ByteArray?) = toRemoteExceptions {
            val channel = ChannelProtos.Channel.parseFrom(payload)
            sendToRadio(newMeshPacketTo(num).buildAdminPacket(id = id) { setChannel = channel })
        }

        override fun getRemoteChannel(id: Int, destNum: Int, index: Int) = toRemoteExceptions {
            sendToRadio(newMeshPacketTo(destNum).buildAdminPacket(id = id, wantResponse = true) {
                getChannelRequest = index + 1
            })
        }

        override fun beginEditSettings() = toRemoteExceptions {
            sendToRadio(newMeshPacketTo(myNodeNum).buildAdminPacket {
                beginEditSettings = true
            })
        }

        override fun commitEditSettings() = toRemoteExceptions {
            sendToRadio(newMeshPacketTo(myNodeNum).buildAdminPacket {
                commitEditSettings = true
            })
        }

        override fun getChannelSet(): ByteArray = toRemoteExceptions {
            this@MeshService.channelSet.toByteArray()
        }

        override fun getNodes(): MutableList<NodeInfo> = toRemoteExceptions {
            val r = nodeDBbyNodeNum.values.toMutableList()
            info("in getOnline, count=${r.size}")
            // return arrayOf("+16508675309")
            r
        }

        override fun connectionState(): String = toRemoteExceptions {
            val r = this@MeshService.connectionState
            info("in connectionState=$r")
            r.toString()
        }

        override fun startProvideLocation() = toRemoteExceptions {
            startLocationRequests()
        }

        override fun stopProvideLocation() = toRemoteExceptions {
            stopLocationRequests()
        }
        override fun removeByNodenum(requestId: Int, nodeNum: Int) = toRemoteExceptions {
            sendToRadio(newMeshPacketTo(myNodeNum).buildAdminPacket {
                removeByNodenum = nodeNum

            })

        }
        override fun requestPosition(destNum: Int, position: Position) = toRemoteExceptions {
            if (destNum != myNodeNum) {
                // request position
                sendToRadio(newMeshPacketTo(destNum).buildMeshPacket(
                    channel = nodeDBbyNodeNum[destNum]?.channel ?: 0,
                    priority = MeshPacket.Priority.BACKGROUND,
                ) {
                    portnumValue = Portnums.PortNum.POSITION_APP_VALUE
                    wantResponse = true
                })
            } else {
                // send fixed position (local only/no remote method)
                sendToRadio(newMeshPacketTo(destNum).buildAdminPacket {
                    if (position != Position(0.0, 0.0, 0)) {
                        setFixedPosition = position {
                            latitudeI = Position.degI(position.latitude)
                            longitudeI = Position.degI(position.longitude)
                            altitude = position.altitude
                        }
                            .also { sendPosition(it) } // TODO remove after minDeviceVersion >= 2.3.3
                    } else {
                        removeFixedPosition = true
                    }
                })
            }
        }

        override fun requestTraceroute(requestId: Int, destNum: Int) = toRemoteExceptions {
            sendToRadio(newMeshPacketTo(destNum).buildMeshPacket(
                wantAck = true,
                id = requestId,
                channel = nodeDBbyNodeNum[destNum]?.channel ?: 0,
            ) {
                portnumValue = Portnums.PortNum.TRACEROUTE_APP_VALUE
                wantResponse = true
            })
        }

        override fun requestShutdown(requestId: Int, destNum: Int) = toRemoteExceptions {
            sendToRadio(newMeshPacketTo(destNum).buildAdminPacket(id = requestId) {
                shutdownSeconds = 5
            })
        }

        override fun requestReboot(requestId: Int, destNum: Int) = toRemoteExceptions {
            sendToRadio(newMeshPacketTo(destNum).buildAdminPacket(id = requestId) {
                rebootSeconds = 5
            })
        }

        override fun requestFactoryReset(requestId: Int, destNum: Int) = toRemoteExceptions {
            sendToRadio(newMeshPacketTo(destNum).buildAdminPacket(id = requestId) {
                factoryResetDevice = 1
            })
        }

        override fun requestNodedbReset(requestId: Int, destNum: Int) = toRemoteExceptions {
            sendToRadio(newMeshPacketTo(destNum).buildAdminPacket(id = requestId) {
                nodedbReset = 1
            })
        }
    }
}