package main

import (
	"fmt"
	MQTT "github.com/eclipse/paho.mqtt.golang"
	"os"
	"time"
)

var f MQTT.MessageHandler = func(client MQTT.Client, msg MQTT.Message) {
	fmt.Printf("TOPIC: %s (%s)\n", msg.Topic(), msg.MessageID())
	fmt.Printf("MSG: %s\n", msg.Payload())
}

func main() {
	opts := MQTT.NewClientOptions().AddBroker("tcp://localhost:1883")
	opts.SetClientID("go-simple")
	opts.SetCleanSession(false)
	opts.SetDefaultPublishHandler(f)

	c := MQTT.NewClient(opts)
	if token := c.Connect(); token.Wait() && token.Error() != nil {
		panic(token.Error())
	}

	if token := c.Subscribe("test/#", 0, nil); token.Wait() && token.Error() != nil {
		fmt.Println(token.Error())
		os.Exit(1)
	}

	time.Sleep(300 * time.Second)

	if token := c.Unsubscribe("go-mqtt/sample"); token.Wait() && token.Error() != nil {
		fmt.Println(token.Error())
		os.Exit(1)
	}

	c.Disconnect(250)
}