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

import config
import devices
from function.rooms import room_shelly
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 brightness_choose_n_action(object):
    def __init__(self, mqtt_client, button_tradfri, topic_led):
        self.gui_led_active_device = devices.nodered_gui_leds(mqtt_client, topic_led)
        # brightness change
        button_tradfri.add_callback(devices.tradfri_button.KEY_ACTION,
                                    devices.tradfri_button.ACTION_BRIGHTNESS_DOWN_LONG, self.brightness_action)
        button_tradfri.add_callback(devices.tradfri_button.KEY_ACTION, devices.tradfri_button.ACTION_BRIGHTNESS_UP_LONG, self.brightness_action)
        button_tradfri.add_callback(devices.tradfri_button.KEY_ACTION,
                                    devices.tradfri_button.ACTION_BRIGHTNESS_DOWN_RELEASE, self.brightness_action)
        button_tradfri.add_callback(devices.tradfri_button.KEY_ACTION,
                                    devices.tradfri_button.ACTION_BRIGHTNESS_UP_RELEASE, self.brightness_action)
        # device change
        button_tradfri.add_callback(devices.tradfri_button.KEY_ACTION, devices.tradfri_button.ACTION_BRIGHTNESS_UP, self.choose_next_device)
        button_tradfri.add_callback(devices.tradfri_button.KEY_ACTION, devices.tradfri_button.ACTION_BRIGHTNESS_DOWN, self.choose_prev_device)
        #
        self.brightness_device_list = []
        self.callback_device_list = []
        self.device_states = []
        self.active_device_state = None
        self.update_active_device_led()

    def add(self, brightness_device, callback_device, callback_key):
        """
        brightness_device: A device for brightness function needs to have the following methods:
        * .default_inc()
        * .default_dec()
        * .default_stop()
        callback_device: A device for installing callback which are executed, when the device is switched on or off. It needs the following method:
        * .add_callback(key, data or None, callback, on_changes_only)
        """
        if len(self.brightness_device_list) >= len(devices.nodered_gui_leds.KEY_LED_LIST):
            raise ValueError("Number of devices is limited by number of leds in devices.nodered_gui_leds.")
        self.brightness_device_list.append(brightness_device)
        self.callback_device_list.append((callback_device, callback_key))
        self.device_states.append(False)
        callback_device.add_callback(callback_key, True, self.device_state_action, True)
        callback_device.add_callback(callback_key, False, self.device_state_action, True)

    def device_state_action(self, device, key, data):
        self.device_states[self.callback_device_list.index((device, key))] = data
        if data is True:
            self.active_device_state = self.callback_device_list.index((device, key))
            self.update_active_device_led()
        else:
            self.choose_next_device()

    def update_active_device_led(self):
        for i in range(0, len(self.brightness_device_list)):
            self.gui_led_active_device.set_led(devices.nodered_gui_leds.KEY_LED_LIST[i], self.active_device_state == i)

    def choose_prev_device(self, device=None, key=None, data=None):
        if self.active_device_state is not None:
            start_value = self.active_device_state
            for i in range(0, len(self.brightness_device_list)):
                target_state = (start_value - i - 1) % (len(self.brightness_device_list))
                if self.device_states[target_state]:
                    self.active_device_state = target_state
                    self.update_active_device_led()
                    return
        self.active_device_state = None
        self.update_active_device_led()

    def choose_next_device(self, device=None, key=None, data=None):
        if self.active_device_state is not None:
            start_value = self.active_device_state
            for i in range(0, len(self.brightness_device_list)):
                target_state = (start_value + i + 1) % (len(self.brightness_device_list))
                if self.device_states[target_state]:
                    self.active_device_state = target_state
                    self.update_active_device_led()
                    return
        self.active_device_state = None
        self.update_active_device_led()

    def brightness_action(self, device, key, data):
        if self.active_device_state is not None:
            target = self.brightness_device_list[self.active_device_state]
            if data == devices.tradfri_button.ACTION_BRIGHTNESS_UP_LONG:
                logger.info("Increasing \"%s\" - %s", type(self).__name__, target.topic)
                target.default_inc()
            elif data == devices.tradfri_button.ACTION_BRIGHTNESS_DOWN_LONG:
                logger.info("Decreasing \"%s\" - %s", type(self).__name__, target.topic)
                target.default_dec()
            elif data in [devices.tradfri_button.ACTION_BRIGHTNESS_UP_RELEASE, devices.tradfri_button.ACTION_BRIGHTNESS_DOWN_RELEASE]:
                target.default_stop()


class circulation_pump(room_shelly):
    def __init__(self, mqtt_client):
        super().__init__(mqtt_client, config.TOPIC_FFE_KITCHEN_CIRCULATION_PUMP_SHELLY, config.TOPIC_FFE_KITCHEN_CIRCULATION_PUMP_GUI)
        #
        self.main_light_shelly.add_callback(devices.shelly.KEY_OUTPUT_0, None, self.circ_pump_actions, True)
        #
        self.gui_main_light.set_timer('-')
        #
        self.ct = task.periodic(6, self.cyclic_task)
        self.pump_timer = None
        #
        self.ct.run()

    def circ_pump_actions(self, device, key, data):
        if data is True:
            self.pump_timer = 10
            self.gui_main_light.set_timer(self.pump_timer)
        else:
            self.pump_timer = None
            self.gui_main_light.set_timer('-')

    def cyclic_task(self, rt):
        if self.pump_timer is not None:
            if self.pump_timer <= 0:
                self.pump_timer = None
                self.gui_main_light.set_timer('-')
            else:
                self.gui_main_light.set_timer(self.pump_timer)
                self.pump_timer -= self.ct.cycle_time / 60


class radiator_function(object):
    BOOST_TEMPERATURE = 30
    AWAY_REDUCTION = 5
    SUMMER_TEMPERATURE = 5

    def __init__(self, mqtt_client, topic_valve, topic_gui, default_temperature):
        self.default_temperature = default_temperature
        self.regular_temp_setpoint = self.default_temperature
        self.__away_mode__ = False
        self.__summer_mode__ = False
        #
        self.ct = task.periodic(1, self.cyclic_task)
        #
        self.heating_valve = devices.brennenstuhl_heatingvalve(mqtt_client, topic_valve)
        self.gui_heating = devices.nodered_gui_radiator(mqtt_client, topic_gui)
        #
        self.heating_valve.set_heating_setpoint(self.default_temperature)
        self.heating_valve.add_callback(devices.brennenstuhl_heatingvalve.KEY_TEMPERATURE, None, self.gui_heating.set_temperature_mcb)
        self.heating_valve.add_callback(devices.brennenstuhl_heatingvalve.KEY_HEATING_SETPOINT, None, self.get_radiator_setpoint)
        #
        self.gui_heating.add_callback(devices.nodered_gui_radiator.KEY_SETPOINT_TEMP, None, self.set_heating_setpoint)
        self.gui_heating.add_callback(devices.nodered_gui_radiator.KEY_BOOST, None, self.boost)
        self.gui_heating.add_callback(devices.nodered_gui_radiator.KEY_SETPOINT_TO_DEFAULT, None, self.setpoint_to_default)
        self.gui_heating.add_callback(devices.nodered_gui_radiator.KEY_AWAY, None, self.away_mode)
        self.gui_heating.add_callback(devices.nodered_gui_radiator.KEY_SUMMER, None, self.summer_mode)
        #
        self.boost_timer = None
        #
        self.ct.run()

    def cyclic_task(self, rt):
        if self.boost_timer is not None:
            self.gui_heating.set_timer(round(self.boost_timer / 60, 1))
            #
            self.boost_timer -= self.ct.cycle_time
            if self.boost_timer <= 0:
                self.cancel_boost()
                self.heating_valve.set_heating_setpoint(self.regular_temp_setpoint)

    def cancel_boost(self, device=None, key=None, data=None):
        if self.boost_timer is not None:
            self.heating_valve.logger.info('Timer expired. returning to regular temperature setpoint %.1f°C.', self.regular_temp_setpoint)
            self.boost_timer = None
            self.gui_heating.set_timer('-')

    def update_states(self, away_mode=None, summer_mode=None):
        if away_mode is not None:
            self.__away_mode__ = away_mode
        if summer_mode is not None:
            self.__summer_mode__ = summer_mode
        self.gui_heating.set_away(self.__away_mode__)
        self.gui_heating.set_summer(self.__summer_mode__)
        self.gui_heating.set_enable(not self.__away_mode__ and not self.__summer_mode__)

    def away_mode(self, device, key, value):
        if value is True:
            self.cancel_boost()
            self.update_states(away_mode=value, summer_mode=False)
            self.heating_valve.set_heating_setpoint(self.default_temperature - self.AWAY_REDUCTION)
        else:
            self.update_states(away_mode=value)
            self.heating_valve.set_heating_setpoint(self.default_temperature)

    def summer_mode(self, device, key, value):
        if value is True:
            self.cancel_boost()
            self.update_states(away_mode=False, summer_mode=value)
            self.heating_valve.set_heating_setpoint(self.SUMMER_TEMPERATURE)
        else:
            self.update_states(summer_mode=value)
            self.heating_valve.set_heating_setpoint(self.default_temperature)

    def boost(self, device, key, data):
        if self.boost_timer is None:
            self.heating_valve.logger.info('Starting boost mode with setpoint %.1f°C.', self.BOOST_TEMPERATURE)
            self.boost_timer = 15*60
            self.heating_valve.set_heating_setpoint(self.BOOST_TEMPERATURE)
        else:
            self.boost_timer += 15 * 60
        if self.boost_timer > 60 * 60:
            self.boost_timer = 60 * 60
        self.update_states(away_mode=False, summer_mode=False)

    def setpoint_to_default(self, device, key, data):
        self.set_heating_setpoint(device, key, self.default_temperature)

    def set_heating_setpoint(self, device, key, data):
        self.heating_valve.set_heating_setpoint(data)
        self.cancel_boost()
        self.update_states(away_mode=False, summer_mode=False)

    def get_radiator_setpoint(self, device, key, data):
        self.gui_heating.set_setpoint_temperature(data)
        self.update_states()
        if self.boost_timer is None and not self.__away_mode__ and not self.__summer_mode__:
            self.regular_temp_setpoint = data