#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
from devices.base import base
import json
import task
import time


class brennenstuhl_heatingvalve(base):
    """ Communication (MQTT)

        brennenstuhl_heatingvalve {
                                |      "away_mode": ["ON", "OFF"]
                                |      "battery": [0...100] %
                                |      "child_lock": ["LOCK", "UNLOCK"]
                                |      "current_heating_setpoint": [5...30] °C
                                |      "linkquality": [0...255] lqi
                                |      "local_temperature": [numeric] °C
                                |      "preset": ["manual", ...]
                                |      "system_mode": ["heat", ...]
                                |      "valve_detection": ["ON", "OFF"]
                                |      "window_detection": ["ON", "OFF"]
                                | }
                                +- set {
                                           "away_mode": ["ON", "OFF", "TOGGLE"]
                                           "child_lock": ["LOCK", "UNLOCK"]
                                           "current_heating_setpoint": [5...30] °C
                                           "preset": ["manual", ...]
                                           "system_mode": ["heat", ...]
                                           "valve_detection": ["ON", "OFF", "TOGGLE"]
                                           "window_detection": ["ON", "OFF", "TOGGLE"]
                                       }
    """
    KEY_LINKQUALITY = "linkquality"
    KEY_BATTERY = "battery"
    KEY_HEATING_SETPOINT = "current_heating_setpoint"
    KEY_TEMPERATURE = "local_temperature"
    #
    KEY_AWAY_MODE = "away_mode"
    KEY_CHILD_LOCK = "child_lock"
    KEY_PRESET = "preset"
    KEY_SYSTEM_MODE = "system_mode"
    KEY_VALVE_DETECTION = "valve_detection"
    KEY_WINDOW_DETECTION = "window_detection"
    #
    RETRY_CYCLE_TIME = 2.5
    MAX_TX_RETRIES = 20
    RETRY_TIMEOUT = RETRY_CYCLE_TIME * MAX_TX_RETRIES
    #
    TX_TYPE = base.TX_DICT
    #
    RX_KEYS = [KEY_LINKQUALITY, KEY_BATTERY, KEY_HEATING_SETPOINT, KEY_TEMPERATURE]
    RX_IGNORE_KEYS = [KEY_AWAY_MODE, KEY_CHILD_LOCK, KEY_PRESET, KEY_SYSTEM_MODE, KEY_VALVE_DETECTION, KEY_WINDOW_DETECTION]

    def __init__(self, mqtt_client, topic):
        super().__init__(mqtt_client, topic)
        self.mqtt_client.send(self.topic + '/' + self.TX_TOPIC, json.dumps({self.KEY_WINDOW_DETECTION: "ON",
                              self.KEY_CHILD_LOCK: "UNLOCK", self.KEY_VALVE_DETECTION: "ON", self.KEY_SYSTEM_MODE: "heat", self.KEY_PRESET: "manual"}))
        self.add_callback(self.KEY_HEATING_SETPOINT, None, self.__valave_temp_rx__)
        self.__tx_temperature__ = None
        self.__rx_temperature__ = None
        self.__tx_timestamp__ = 0
        #
        self.task = task.periodic(self.RETRY_CYCLE_TIME, self.__task__)
        self.task.run()

    def __state_logging__(self, inst, key, data):
        if key in [self.KEY_HEATING_SETPOINT, self.KEY_CHILD_LOCK, self.KEY_WINDOW_DETECTION, self.KEY_VALVE_DETECTION]:
            self.logger.info("State change of '%s' to '%s'", key, repr(data))

    def send_command(self, key, data):
        if key == self.KEY_HEATING_SETPOINT:
            self.__tx_temperature__ = data
            self.__tx_timestamp__ = time.time()
        base.send_command(self, key, data)

    def __valave_temp_rx__(self, inst, key, data):
        if key == self.KEY_HEATING_SETPOINT:
            self.__rx_temperature__ = data

    def __task__(self, rt):
        if self.__tx_temperature__ is not None and self.__tx_timestamp__ is not None:   # Already send a setpoint
            if self.__tx_temperature__ != self.__rx_temperature__:                      # Setpoint and valve feedback are unequal
                if time.time() - self.__tx_timestamp__ < self.RETRY_TIMEOUT:            # Timeout condition allows resend of setpoint
                    self.logger.warning("Setpoint not yet acknoledged by device. Sending setpoint again")
                    self.set_heating_setpoint(self.__tx_temperature__)
                    return
            else:
                self.__tx_timestamp__ = None                                            # Disable resend logic, if setpoint and valve setpoint are equal

    #
    # RX
    #
    @property
    def linkqulity(self):
        return self.get(self.KEY_LINKQUALITY)

    @property
    def heating_setpoint(self):
        return self.get(self.KEY_HEATING_SETPOINT)

    @property
    def temperature(self):
        return self.get(self.KEY_TEMPERATURE)

    #
    # TX
    #
    def set_heating_setpoint(self, setpoint):
        self.send_command(self.KEY_HEATING_SETPOINT, setpoint)

    def set_heating_setpoint_mcb(self, device, key, data):
        self.set_heating_setpoint(data)