# simclient/simclient.py
import time
import paho.mqtt.client as mqtt


def on_message(client, userdata, msg):
    print(f"Empfangen: {msg.topic} {msg.payload.decode()}")


def main():
    client = mqtt.Client()
    client.on_message = on_message
    # Im Docker-Netzwerk: Hostname des MQTT-Brokers ist "mqtt"
    client.connect("mqtt", 1883)
    client.subscribe("infoscreen/+/now")
    while True:
        # Heartbeat senden
        client.publish("infoscreen/client1/heartbeat", "alive")
        client.loop(timeout=1.0)
        time.sleep(5)


if __name__ == "__main__":
    main()