import config
import logging
import paho.mqtt.client as mqtt
import report
import subprocess
import time

try:
    from config import APP_NAME as ROOT_LOGGER_NAME
except ImportError:
    ROOT_LOGGER_NAME = 'root'
logger = logging.getLogger(ROOT_LOGGER_NAME).getChild('main')


class sispmctl(object):
    AMP_CHANNEL = 0

    def __init__(self, mqtt_client):
        logger.info("Starting sispmctl module...")
        self.__mqtt_client__ = mqtt_client
        self.__state__ = [False, False, False, False]
        self.__state_requests__ = [{}, {}, {}, {}]
        try:
            out_txt = subprocess.check_output(["sudo", "sispmctl", "-f", "all"]).decode('UTF-8')
        except subprocess.CalledProcessError as grepexc:                                                                                                   
            logger.error("sispm error code %d", grepexc.returncode)
        else:
            logger.info('sispmctl all channels switched off')
        self.publish_states()

    def __filter_output_parameter__(self, output):
        try:
            return int(output)
        except ValueError:
            return output

    def set_out_state(self, output, state):
        if output == "all":
            if self.__state__ != [state, state, state, state]:
                self.__set_out_state__(output, state)
        else:
            if self.__state__[int(output) - 1] != state:
                self.__set_out_state__(output, state)            

    def __set_out_state__(self, output, state):
            try:
                out_txt = subprocess.check_output(["sudo", "sispmctl", "-o" if state == True else "-f", output]).decode('UTF-8')
            except subprocess.CalledProcessError as grepexc:                                                                                                   
                logger.error("sispm error code %d", grepexc.returncode)
            else:
                logger.info('sispmctl channel %s changed to %s', output, state)
                self.publish_states()

    def get_out_states(self):
        try:
            out_txt = subprocess.check_output(["sudo", "sispmctl", "-g", "all"])
        except subprocess.CalledProcessError as grepexc:
            logger.error("sispm error code %d", grepexc.returncode)
        else:
            rv = []
            for i in range(1, 5):
                rv.append(out_txt.decode("UTF-8").split("\n")[i].split("\t")[1] == "on")
            return rv

    def publish_states(self):
        self.__state__ = self.get_out_states()
        for i in range(1, 5):
            self.send_state(i)

    def send_state(self, output):
        topic = config.MQTT_TOPIC + "/status/" + str(output)
        logger.info("Sending Powerplug status information of plug %s to mqtt %s = %s", str(output), topic, str(self.__state__[output - 1]))
        self.__mqtt_client__.publish(topic, "true" if self.__state__[output - 1] else "false")


class mqtt_powerplug(object):
    SUBTOPICS = [
        "set/1",
        "set/2",
        "set/3",
        "set/4",
        "set/all"
    ]

    def __init__(self):
        self.__client__ = mqtt.Client("mqtt_powerplug")                         # create client object
        self.__client__.on_message = self.__receive__                           # attach function to callback
        self.__client__.username_pw_set(config.MQTT_USER, config.MQTT_PASS)     # login with credentials
        self.__client__.connect(config.MQTT_SERVER, 1883)                       # establish connection
        self.__client__.loop_start()                                            # start the loop
        self.__topics__ = []
        for subtopic in self.SUBTOPICS:
            self.__topics__.append(config.MQTT_TOPIC + "/" + subtopic)
            self.__client__.subscribe(self.__topics__[-1])                      # subscibe a topic
        self.__sc__ = sispmctl(self.__client__)

    def __receive__(self, client, userdata, message):
        if message.topic in self.__topics__:
            output = message.topic.split("/")[-1]
            state = message.payload == b"true"
            logger.info("Received request to set output channel %s to state %s", output, str(state))
            self.__sc__.set_out_state(output, state)
        else:
            logger.warning("Ignoring unknown mqtt topic %s", message.topic)

    def __del__(self):
        self.__client__.loop_stop()                                              # stop the loop


if __name__ == '__main__': 
    report.appLoggingConfigure(config.__BASEPATH__, config.LOGTARGET, ((config.APP_NAME, config.LOGLVL), ), fmt=config.formatter, host=config.LOGHOST, port=config.LOGPORT)
    #    
    mp = mqtt_powerplug()

    while True:
        time.sleep(30)
        mp.__sc__.publish_states()