# -*- coding: utf-8 -*-
import asyncio

from cbpi.api import parameters, Property, CBPiSensor
from cbpi.api import *
import logging
import json

@parameters([Property.Text(label="Topic", configurable=True, description="MQTT Topic"),
             Property.Text(label="PayloadDictionary", configurable=True, default_value="",
                           description="Where to find msg in payload, leave blank for raw payload")])
class MQTTSensor(CBPiSensor):

    def __init__(self, cbpi, id, props):
        super(MQTTSensor, self).__init__(cbpi, id, props)
        self.Topic = self.props.get("Topic", None)
        self.payload_text = self.props.get("PayloadDictionary", None)
        if self.payload_text != None:
            self.payload_text = self.payload_text.split('.')
        self.mqtt_task = self.cbpi.satellite.subcribe(self.Topic, self.on_message)
        self.value: float = 999

    async def on_message(self, message):
        val = json.loads(message)
        try:
            if self.payload_text is not None:
                for key in self.payload_text:
                    val = val.get(key, None)

            if isinstance(val, (int, float, str)):
                self.value = float(val)
                self.log_data(self.value)
                self.push_update(self.value)
        except Exception as e:
            logging.info("MQTT Sensor Error {}".format(e))

    async def run(self):
        while self.running:
            await asyncio.sleep(1)

    def get_state(self):
        return dict(value=self.value)

    async def on_stop(self):
        if self.mqtt_task.done() is False:
            self.mqtt_task.cancel()
            try:
                await self.mqtt_task
            except asyncio.CancelledError:
                pass


def setup(cbpi):
    '''
    This method is called by the server during startup
    Here you need to register your plugins at the server

    :param cbpi: the cbpi core
    :return:
    '''
    if str(cbpi.static_config.get("mqtt", False)).lower() == "true":
        cbpi.plugin.register("MQTTSensor", MQTTSensor)