package mqtt

import (
	"fmt"
	"log"

	"github.com/dustinpianalto/errors"
	"github.com/dustinpianalto/weather"
	mqtt "github.com/eclipse/paho.mqtt.golang"
)

var (
	AmbientService weather.AmbientService
)

func CreateMQTTClient(host, username, password string, port int) {
	opts := mqtt.NewClientOptions()
	opts.AddBroker(fmt.Sprintf("tcp://%s:%d", host, port))
	opts.SetClientID("weather_bridge")
	opts.SetUsername(username)
	opts.SetPassword(password)
	opts.OnConnect = connectHandler
	opts.OnConnectionLost = connectionLostHandler
	client := mqtt.NewClient(opts)
	log.Println("mqtt client created")
	token := client.Connect()
	if token.Wait() && token.Error() != nil {
		log.Println(token.Error())
		return
	}
	initServices(&client)
	log.Println("mqtt client initalized")
}

func connectHandler(client mqtt.Client) {
	log.Println("MQTT Connected")
}

func connectionLostHandler(client mqtt.Client, err error) {
	const method string = "mqtt/connectionLostHandler"
	log.Println(errors.E(method, errors.Internal, "MQTT Connection Lost", err))
}

func initServices(client *mqtt.Client) {
	AmbientService = eventService{client: client}
}