import json
import logging
import mqtt
import nagios
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(__name__)


class base(object):
    FOLLOW_REQUEST_WARNING = 5      # Seconds, till warning comes up, if device does not follow the command
    FOLLOW_REQUEST_ERROR = 60       # Seconds, till error comes up, if device does not follow the command
    FOLLOW_KEYS = ["current_heating_setpoint", ]
    #
    BATTERY_LVL_WARNING = 10
    BATTERY_LVL_ERROR = 5

    def __init__(self, mqtt_client: mqtt.mqtt_client, topic):
        self.topic = topic
        #
        mqtt_client.add_callback(topic, self.__rx__)
        mqtt_client.add_callback(topic + '/#', self.__rx__)
        #
        self.__target_storage__ = {}
        self.__state_storage__ = {}
        #
        self.battery = None

    def __rx__(self, client, userdata, message):
        pass

    def target(self, key, value):
        tm_t, value_t = self.__target_storage__.get(key, (0, None))
        if value != value_t:
            self.__target_storage__[key] = time.time(), value
        logger.debug("Target value for device identified: %s: %s", key, repr(value))

    def state(self, key, value):
        self.__state_storage__[key] = time.time(), value
        logger.debug("Device state identified: %s: %s", key, repr(value))

    def status(self, key):
        #
        # FOLLOW SETPOINT
        #
        if key in self.FOLLOW_KEYS:
            tm_s, value_s = self.__state_storage__.get(key, (0, None))
            try:
                tm_t, value_t = self.__target_storage__[key]
            except KeyError:
                if value_s is not None:
                    return {"status": nagios.Nagios.WARNING, "msg": "Current temperature setpoint %.1f°C (age=%.1fs), but never received a setpoint" % (value_s, time.time()-tm_s)}
                return {"status": nagios.Nagios.UNKNOWN, "msg": "Device exists, but no data received or unknown monitoring"}
            else:
                tm = time.time()
                dt = tm - tm_t
                if value_t != value_s and dt > self.FOLLOW_REQUEST_ERROR:
                    return {"status": nagios.Nagios.ERROR, "msg": "Requested setpoint unequal valve setpoint since %.1f°C (age=%.1fs)" % (value_s, time.time()-tm_s)}
                elif value_t != value_s and dt > self.FOLLOW_REQUEST_WARNING:
                    return {"status": nagios.Nagios.WARNING, "msg": "Requested setpoint unequal valve setpoint since %.1f°C (age=%.1fs)" % (value_s, time.time()-tm_s)}
                return {"status": nagios.Nagios.OK, "msg": "Requested setpoint equal valve setpoint %.1f°C (age=%.1fs)" % (value_s, time.time()-tm_s)}
        #
        # BATTERY
        #
        elif key == "battery":
            if self.battery is None:
                return {"status": nagios.Nagios.UNKNOWN, "msg": "Device exists, but no data received or unknown monitoring"}
            elif self.battery < self.BATTERY_LVL_ERROR:
                return {"status": nagios.Nagios.ERROR, "msg": "Battery level critical low (%.1f%%)" % self.battery}
            elif self.battery < self.BATTERY_LVL_WARNING:
                return {"status": nagios.Nagios.WARNING, "msg": "Battery level low (%.1f%%)" % self.battery}
            else:
                return {"status": nagios.Nagios.OK, "msg": "Battery okay (%.1f%%)" % self.battery}


class group(object):
    def __init__(self, *args, **kwargs):
        pass


class shelly_sw1(base):
    pass


class tradfri_sw(base):
    pass


class tradfri_sw_br(base):
    pass


class tradfri_sw_br_ct(base):
    pass


class tradfri_button(base):
    pass


class livarno_sw_br_ct(base):
    pass


class brennenstuhl_heatingvalve(base):
    def __init__(self, mqtt_client: mqtt.mqtt_client, topic):
        base.__init__(self, mqtt_client, topic)

    def __rx__(self, client, userdata, message):
        payload = json.loads(message.payload)
        if "current_heating_setpoint" in payload:
            if message.topic == self.topic + '/set':
                self.target("current_heating_setpoint", payload["current_heating_setpoint"])
            if message.topic == self.topic:
                self.state("current_heating_setpoint", payload["current_heating_setpoint"])
        if "battery" in payload and message.topic == self.topic:
            self.battery = payload["battery"]


class silvercrest_powerplug(base):
    pass


class silvercrest_motion_sensor(base):
    pass


class my_powerplug(base):
    pass


class audio_status(base):
    pass


class remote(base):
    pass