import datetime
import sys

import paho.mqtt.client as mqtt

SHELLY_ID = ""
POWER_THRESHOLD = 0
TIME_THRESHOLD = 15 * 60

LAST_TIME = None

def on_message(client, userdata, msg):
    global LAST_TIME

    topic = msg.topic
    payload = msg.payload

    print(topic, file=sys.stderr)
    print(payload, file=sys.stderr)

    if topic.endswith("/relay/0/command") and payload.decode("UTF-8") == "on":
        if LAST_TIME == None:
            LAST_TIME = datetime.datetime.now()
            print("UPDATE TIME", file=sys.stderr)
    if topic.endswith("/relay/0/command") and payload.decode("UTF-8") == "off":
        LAST_TIME = None
        print("RESET TIME", file=sys.stderr)

    if topic.endswith("/relay/0/power") and LAST_TIME != None:
        if float(payload.decode("UTF-8")) > POWER_THRESHOLD:
            LAST_TIME = datetime.datetime.now()
            print("RESET POWER", file=sys.stderr)
        elif (datetime.datetime.now() - LAST_TIME).total_seconds() > TIME_THRESHOLD:
            #client.publish(f"shellies/{SHELLY_ID}/relay/0", "off")
            print('{ "state": "Free" }')
            sys.stdout.flush()
            LAST_TIME = None
            print("RESET STATE", file=sys.stderr)
        else:
            print("WAITING TIME", file=sys.stderr)
    sys.stderr.flush()

def ask_exit(*args):
    STOP.set()

def main(host):
    client = client = mqtt.Client(f"shelly_client_{SHELLY_ID}")

    client.on_message = on_message

    client.connect(host)
    client.subscribe(f"shellies/{SHELLY_ID}/relay/0/#")

    client.loop_forever()

if __name__ == '__main__':
    host = sys.argv[1]
    SHELLY_ID = sys.argv[2]
    POWER_THRESHOLD = int(sys.argv[3])

    main(host)