"""
EnergySystem module
SPDX - License - Identifier: LGPL - 3.0 - or -later
Copyright © 2020 Project Author Pilar Monsalvete Alvarez de Uribarri pilar.monsalvete@concordia.ca
Contributor Peter Yefi peteryefi@gmail.com
"""

from city_model_structure.city_object import CityObject
from city_model_structure.energy_systems.heat_pump import HeatPump


class EnergySystem(CityObject):
  """
  EnergySystem(CityObject) class
  """

  def __init__(self, name, lod, surfaces, city_lower_corner):
    super().__init__(name, lod, surfaces, city_lower_corner)
    self._heat_pump = None
    self._type = 'energy_system'

  @property
  def heat_pump(self) -> HeatPump:
    """
    Heat pump energy system
    :return:
    """
    return self._heat_pump

  @heat_pump.setter
  def heat_pump(self, value):
    """
    Set heat pumm for energy system
    :param value: HeatPump
    """
    if self._heat_pump is None:
      self._heat_pump = value

  @property
  def type(self) -> str:
    """
    Type of city object
    :return: str
    """
    return self._type