package com.kmlabz.birbnetes

import com.google.gson.GsonBuilder
import com.typesafe.config.ConfigFactory
import io.ktor.application.*
import io.ktor.config.*
import io.ktor.request.*
import io.ktor.routing.*
import io.ktor.util.*
import kotlin.text.toCharArray
import org.eclipse.paho.client.mqttv3.MqttClient
import org.eclipse.paho.client.mqttv3.MqttConnectOptions
import org.eclipse.paho.client.mqttv3.MqttMessage
import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence


fun main(args: Array<String>): Unit = io.ktor.server.netty.EngineMain.main(args)

@KtorExperimentalAPI
@Suppress("unused") // Referenced in application.conf
@kotlin.jvm.JvmOverloads
fun Application.module(testing: Boolean = false) {

    val appConfig = HoconApplicationConfig(ConfigFactory.load())
    val persistence = MemoryPersistence()
    val mqttClient = MqttClient(appConfig.property("ktor.mq.broker").getString(), MqttClient.generateClientId(), persistence)
    val connOpts = MqttConnectOptions()
    val gson = GsonBuilder().create()
    val message = MqttMessage("0".toByteArray())

    environment.monitor.subscribe(ApplicationStarted){
        connOpts.isCleanSession = true
        connOpts.userName = appConfig.property("ktor.mq.username").getString()
        connOpts.password = appConfig.property("ktor.mq.password").getString().toCharArray()
        mqttClient.connect(connOpts)
        message.qos = 0
    }

    environment.monitor.subscribe(ApplicationStopped){
        mqttClient.disconnect()
    }

    routing {
        get("/") {
            val requestBody : String = call.receiveText()
            val msgObj: MessageObject = gson.fromJson(requestBody,MessageObject::class.java)
            mqttClient.publish("command/${msgObj.device_id}", message)
        }
    }
}