# -*- coding: utf-8 -*-

"""
alarm
~~~~~

This module contains the ATFC alarm logic.
"""

from abc import ABC, abstractmethod


class Alarm(ABC):
    """The base Alarm"""

    def __init__(self, params):
        self._params = params

    def get(self, property_name):
        return self._params.get(property_name)

    def set_alarm(self, category):
        self._params.update({'alarm_type': category})

    @abstractmethod
    def procedure(self):
        raise NotImplementedError


class FanCoilUnitAlarm(Alarm):

    def __init__(self, params):
        super().__init__(params)

    def procedure(self):
        if self.get('water_valve_switch') == 1 and 0 not in self.get('water_valve_history_status'):
            if len(set(self.get('tap_history_status'))) == 1:

                air_temp_diff = self.get('return_air_temp') - abs(self.get('supply_air_temp'))
                water_temp_diff = self.get('water_out_temp') - abs(self.get('water_in_temp'))
                if air_temp_diff > 13 and water_temp_diff < 1.5:
                    self.set_alarm(1)

        return