import paho.mqtt.client as mqtt
import yaml
import ssl
import redis
import time
import signal
import sys
import os
import logging


# TODO: yaml configuration file for redis and mqtt settings

def on_connect(client, userdata, flags, rc):
    logging.info("Connected with result code "+str(rc))
    #client.subscribe("$SYS/#")


def on_publish(client, userdata, mid):
    pass


def redis_listen(client, logger):
    logger.info("Listening in redis events")
    r = redis.StrictRedis(host='localhost', port=6379, db=0)
    while 1:
        time.sleep(0)
        data = r.brpop("mqtt_events", 10)
        if data:
            info = data[1].split('|')
            logger.info("Channel: " + info[0] + " message: " + info[1])
            #client.publish(info[0], info[1])
            # set QoS level to 1 for published messages
            client.publish(info[0], info[1], 1)



def get_logger():
    logger = logging.getLogger("mqtt_logger")
    logger.setLevel(logging.INFO)

    fh = logging.FileHandler("/tmp/mqtt_sender.log")
    fmt = '%(asctime)s - %(threadName)s - %(levelname)s - %(message)s'
    formatter = logging.Formatter(fmt)
    fh.setFormatter(formatter)
 
    logger.addHandler(fh)
    return logger

def main():
    logger = get_logger()
    logger.info("Starting mqtt_sender")
    logger.info("Connecting to MQTT server")

    client = mqtt.Client()
    client.on_connect = on_connect
    client.on_publish = on_publish

    # configure mqtt broker to accept localhost
    client.connect("localhost", 1883, 60)

    client.loop_start()
    redis_listen(client, logger)
    client.loop_end()

    #client.loop_forever()


main()