#!/usr/bin/env python
# -*- coding: utf-8 -*-
#

import devices
import logging
import task

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 heating_function_brennenstuhl(object):
    RETURN_TO_DEFAULT_TIME = 45 * 60
    BOOST_TEMP_OFFSET = 5

    def __init__(self, mqtt_client, topic_valve, default_temperature, topic_boost, topic_setpoint, topic_led):
        self.ct = task.periodic(1, self.cyclic_task)
        #
        self.topic = topic_valve
        self.default_temperature = default_temperature
        #
        self.heating_valve = devices.brennenstuhl_heatingvalve(mqtt_client, topic_valve)
        self.heating_valve.set_heating_setpoint(self.default_temperature)
        self.heating_valve.add_callback(
            devices.brennenstuhl_heatingvalve.KEY_HEATING_SETPOINT, None, self.heating_setpoint_actions)

        self.gui_value_temp_setp = devices.nodered_gui(mqtt_client, topic_setpoint)
        self.gui_value_temp_setp.add_callback(
            devices.nodered_gui.KEY_HEATING_SETPOINT, None, self.heating_setpoint_actions)

        self.gui_button_boost = devices.nodered_gui(mqtt_client, topic_boost)
        self.gui_button_boost.add_callback(None, None, self.boost_actions)

        self.gui_led_boost = devices.nodered_gui(mqtt_client, topic_led)

        #
        self.return_to_default_timer = None
        self.return_to_default_setpoint = None
        self.gui_led_boost.set_feedback(False)
        #
        self.ct.run()

    def heating_setpoint_actions(self, device, key, data):
        if device.topic == self.heating_valve.topic:
            # valve setpoint action
            self.gui_value_temp_setp.set_feedback(data)
            if data > self.default_temperature:
                if data != self.return_to_default_setpoint:
                    logger.info('Got heating setpoint (%.1f°C) \"%s\" with deviation to the default value (%.1f°C). Starting timer for returning to default.',
                                data, self.topic, self.default_temperature)
                    self.return_to_default_timer = self.RETURN_TO_DEFAULT_TIME
                    self.return_to_default_setpoint = data
                    self.gui_led_boost.set_feedback(True)
            else:
                if self.return_to_default_timer is not None:
                    logger.info('Deleting timer \"%s\" for returning to default.', self.topic)
                self.return_to_default_timer = None
                self.return_to_default_setpoint = None
                self.gui_led_boost.set_feedback(False)
        elif device.topic == self.gui_value_temp_setp.topic:
            # user setpoint action
            logger.info('Setpoint change \"%s\" to %.1f°C', self.topic, data)
            self.default_temperature = data
            self.heating_valve.set_heating_setpoint(self.default_temperature)
            self.return_to_default_timer = None
            self.return_to_default_setpoint = None
            self.gui_led_boost.set_feedback(False)

    def boost_actions(self, davice, key, data):
        logger.info('Starting boost mode \"%s\" with setpoint %.1f°C.',
                    self.topic, self.default_temperature + self.BOOST_TEMP_OFFSET)
        self.heating_valve.set_heating_setpoint(self.default_temperature + self.BOOST_TEMP_OFFSET)

    def cyclic_task(self, rt):
        if self.return_to_default_timer is not None:
            self.return_to_default_timer -= self.ct.cycle_time
            if self.return_to_default_timer <= 0:
                logger.info('Return to default timer expired \"%s\".', self.topic)
                self.heating_valve.set_heating_setpoint(self.default_temperature)
                self.return_to_default_timer = None
                self.return_to_default_setpoint = None
                self.gui_led_boost.set_feedback(False)